US1933650A - Signaling system - Google Patents

Signaling system Download PDF

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US1933650A
US1933650A US181528A US18152827A US1933650A US 1933650 A US1933650 A US 1933650A US 181528 A US181528 A US 181528A US 18152827 A US18152827 A US 18152827A US 1933650 A US1933650 A US 1933650A
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line
impulses
distributor
transmitting
cylinder
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US181528A
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Henry M Bascom
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AT&T Corp
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American Telephone and Telegraph Co Inc
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M3/00Automatic or semi-automatic exchanges
    • H04M3/60Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator
    • H04M3/64Arrangements for signalling the number or class of the calling line to the operator

Definitions

  • Thisinvention relates to indicating systems for the display at one point of numbers, characters, or other symbols in response to thevactuation of a suitable sending device at a distant point, and
  • a transmitting mechanism comprising a rotary distributor adapted to connect a source of direct potential to its segments inv rapid succession, said segments being associated, respectively, with contacts of a selector switch which is set by means of a keyboard or dial in accordance with the number to be called and the brushes of which are associated with the line,V whereby corresponding properly spaced impulses are transmitted.
  • At the receiving end of the line is a mechanism rftating in synchronism with thedistributor and controlling the light from a glow lamp, which is momentarily lighted by each received impulse, to thereby set up the desired number on a translucent screen by means of an optical system.
  • Fig. 2 is a front view of the ground glass screen of the indicator of Fig. 1 and shows projected thereon a four-digit number; e
  • Figs. 3 and 4 show analternative arrangement which differs principally from the arrangement of Figs. 1 and 2 in that the indicator employs an opaque revolving disc instead of a cylinder on which appears a transparent arrow which is illuminated by the glow lamp and points to a number on a stationary number plate surrounding the revolving disc, and that, in the vdistributor, instead of the brush making direct contact with the segments, it passes before vthe segments without actually touching them but sumi ciently close to cause an inductive disturbance in an associated output ampliiier circuit.
  • the indicator employs an opaque revolving disc instead of a cylinder on which appears a transparent arrow which is illuminated by the glow lamp and points to a number on a stationary number plate surrounding the revolving disc, and that, in the vdistributor, instead of the brush making direct contact with the segments, it passes before vthe segments without actually touching them but sumi ciently close to cause an inductive disturbance in an associated output amplii
  • 1 is a rotary distributor similar to equipment employed in printing telegraphy, etc. having a plurality of 6, contact segments 2 wiped over by brush arm 3 driven at a rate of speed, of the order of 6000 revolutions per minute, through the medium of a shaft 4 by a motor 5.
  • a grounded battery is connected to the brush arm 3.
  • the number of dstributor segments or contacts is determined by the number of digits in the number to be transmitted and assuming a four digit number, a minimum of forty segments is required.
  • switches 6-U, 6-T, 6-H, and -TH Associated with the distributor, and assuming provisions for transmitting a four-digit number, are four selective switches 6-U, 6-T, 6-H, and -TH, each of which consists of a bank of ten contacts, one contact for each of the ten digits in the units, tens, hundreds, and thousands groups.
  • switches may be well-known stepby-step switches used in automatic telephony,
  • Each of the forty switch contacts is individually wired to one of the distributor segments, as shown.
  • the contact arms of the switches are connected in multiple to one terminal of a winding of a transformer or repeating coil 7, the other terminal of which is connected to ground.
  • a second transformer 12 may be inserted, the secondary winding of which is connected to the terminals of a neon tube or lamp 13, which has the property of responding promptly to the connection and disconnection of electrical potential.
  • an opaque cylinder 14 Surrounding the lamp 13 is an opaque cylinder 14 rotating on a shaft and driven by a motor 16 which operates in synchronism with the motor no 5 at the transmitting end of the line.
  • Any suitable means well known in the ait such as used in printing telegraphy, may be employed for maintaining the two motors in synchronism, for example, a line 19 terminating in synchronizing equipment 17 associated with each motor .may be utilized, but as the method of synchronizing forms no part of the present invention, it has not been described in any detail.
  • Behindihe neon lamp 13 is a reflector 20 arranged so as to cause a narrow band of light to shine onthe inner surface of the cylinder parallel to its axis. Obviously, this band of light will illuminateffthe translucent digit which is oppositjthis .point in the Cylinder at the instant the lamp is lighted.
  • a stationary lens 22 Outside the cylinder and in line with each row of digits is a stationary lens 22 and in front of the row of lenses is a stationary ground glass screen.
  • the lenses 22 are so constructed and arranged as to project, on the screen, the illuminated digit somewhat enlarged in size,
  • the lamp 13 Due to the speed of the distributor or impulser at the transmitting station, which as before stated is of the order of revoluions per second, the lamp 13 will be illuminated and extinguished so rapidly that the eye is unable to distinguish the flashes and it therefore appears as a steady light.
  • a fifth switch not shown, and four additional segments would be required at lthe transmitting station and a fifth row of translucent digits and a corresponding lens would be required in connection with the indicator.
  • These amplifiers consist of -a vacuum tube having a grid battery C and a plate battery B together with an associated output coil 25. 'I'he rotating segment of the distributor is connected to battery andas it passes before any one of the stationary segments, the potential of that segment, as determined by the C battery of the corresponding amplifier 23 is changed by virtue of the fact that the high resistance R, which serves as a grid leak, is introduced in series with the grid battery.
  • the battery connected to the rotary segment is, of course, of a different potential than the C battery of the amplifier, and consequently, the potential on the grid G of any particular tube is increased when the rotating member of the distributor passes the stationary contact to which the grid is connected and is restored to normal after the rotating member has passed by the segment in question.
  • This change of grid potential causes a single ampliedimpulse to be sent to the associated selector switch, such as -TH.
  • the switches -TI-I, 6-H, etc. are set in accordanceI with any desired number, and party line designation, as, for example, 1234.1, bythe action of a dial or operators keyboard as previously mentioned.
  • the one-Way tubes 24, etc. are provided with a C battery C2 and a resistance R2 for the purpose of maintaining the potential of the associated selective switch brush at normal while it is being rotated during the setting operation.
  • the secondary winding of the transformer 7 is connected to the line L which may be equipped with additional amplifiers 9 and 11.
  • Wires from the secondary winding of transformer 12 are run to a circular-shaped neon tube or lamp 13 which is lighted ⁇ for each digit transmitted as in the previously described arrangement.
  • the neon lamp is inclosed in a casing 20.
  • a plate 14 which is opaque except for a transparent arrow 22. This plate is rotated by a motor 16 which operates in synchronism with the motor 5 of the transmitting distributor or impulser l.
  • a stationary circular number plate 21 is mounted on the casing 20 and surrounding the rotating plate 14. On this number plate is indicated the units, tens, hundreds and thousands digit of a four-digit number and also the four party letters, W, R, M and J, or any other desired code.
  • Fig. 1 or Fig. 3 may serve as a common impulse device for a number of groups of selector switches 6.
  • a transmitting station for selectively transmitting to the line a cyclically recurring succession of electrical impulses selectively spaced within the cycle in accordance with a predetermined code corresponding to a plurality of characters which it is desired to simultaneously indicate at the receiving station, said cyclic impulses being transmitted at such a rate that they will be repeated within a time interval not greater than the period of persistence of vision, and a mechanism at the receiving station operating in synchronism with the transmitting distributor for luminously displaying in a row, due to persistence in vision, the plurality of characters transmitted.
  • a transmitting station a receiving station, a line interconnecting them, a mechanism at the transmitting station including a rotary distributor for selectively transmitting to the line a cyclically recurring succession of electrical impulses selectively spaced within the cycle in accordance with a,predetermined code corresponding to a plurality of characters which it is desired to simultaneously indicate at the receiving station, said cyclic impulses being transmitted at such a rate that they will be repeated within a time interval not greater than the period of persistence of vision, and a mechanism at the receiving station including an opaque cylinder rotating in synchronism with the distributor at the transmitting station, a plurality of staggered sets of transparent openings arranged in circumferential rows in the cylinder wall, the openings of each set having different characteristic shapes corresponding to the characters to be indicated, a glow lamp connected to the line and positioned within the cylinder, and stationary means associated with the cylinder for restricting instanianeous visibility of said openings to a single row.
  • a transmitting station for producing and selectively transmitting a cyclically recurring succession of electrical impulses spaced within the cycle in accordance with a predetermined code corresponding to a plurality of characters which it is desired to simultaneously indicate at the receiving station, said impulses being transmitted at such a rate that they will be repeated cyclically within a time interval not greater than the period of persistence of vision
  • said means including a rotating distributor for transmitting the impulses to the line and a selector switch adapted to be set to determine the spacing of the impulses transmitted
  • a mechanism at the receiving station including an opaque cylinder rotating in synchronism with the distributor at the transmitting station, variously shaped transparent openings in the cylinder wall each representing one of the characters which are to be transmitted, a glow lamp connected to the line and so adapted and positioned within the cylinder as to illuminate said transparent openings with each impulse, and means including a screenand a system of lenses
  • a line means at one end thereof for producing and transmitting to said line a cyclically recurring succession of electrical impulses selectively spaced within the cycle in accordance with a predetermined code corresponding to a plurality of characters which it is desired to simultaneously indicate at the other end of the line, said means including a rotating device for transmitting said impulses at such a rate that each cyclic impulse will be repeated within a time interval not greater than the period of persistence of vision, an indicating mechanism at the other end of the line including a rotatable opaque screen, means for rotating said screen in synchronism with the means at the transmitting station, a transparent indicator opening in the opaque screen, an electric glow lamp associated with the line and made active by said line impulses, said lamp being so positioned with respect to said screen as to illuminate said opening, and stationary means cooperating with said rotating screen, and bearing representations of the characters which are to be transmitted, said character representations being so positioned that when the opening in said screen is illuminated, character representations on said stationary members will
  • a telephone call indicator for transmitting and indicating characters
  • means including a rotating member for producing and selectively transmitting to a line a cyclically recurring succession of electrical impulses selectively spaced within the cycle in accordance with a plurality of desired characters to be transmitted and at a cyclic rate such that each impulse will be repeated within a time interval not greater than the period of persistence of vision and means for receiving said impulses and indicating said character comprising an opaque screen revolving in synchronism with the rotating member at the transmitter, a plurality of staggered rows of transparent openings in said screen, the openings of each row being of various shapes to represent the characters transmitted, a glow lamp responsive to the line impulses and so positioned as to illuminate the transparent openings and a stationary member so positioned with respect to the screen as to restrict instantaneous visibility of said illuminated openings to a single row.

Description

Nov. 7, 1933. H. M. BAscoM SIGNALING SYSTEM Filed April 6, 1927 2 Sheets-Sheet l Nov. 7, 1933. H, M. BAscoM 1,933,650
SIGNALING SYSTEM Filed April 6, 1927 2 Sheets-Sheet 2 Patented Nov. 7, 1933 UNITED STATES PATENT OFFICE SIGNALN G SYSTEM Henry M. Bascom, Brooklyn, N. Y., assignor to American Telephone and Telegraph Company, a corporation vof New York Application April 6, 1927. Serial No. 181,528
5Claims.
Thisinvention relates to indicating systems for the display at one point of numbers, characters, or other symbols in response to thevactuation of a suitable sending device at a distant point, and
more particularly to a system for indicating to an' object of the present invention is to provide a' system which makes use of shorter impulses than heretofore, and of such duration that they may be effectively.- transmitted over any circuits capable of transmitting voice frequency currents. The invention has its preferred embodiment, specifically stated in a transmitting mechanism comprising a rotary distributor adapted to connect a source of direct potential to its segments inv rapid succession, said segments being associated, respectively, with contacts of a selector switch which is set by means of a keyboard or dial in accordance with the number to be called and the brushes of which are associated with the line,V whereby corresponding properly spaced impulses are transmitted. At the receiving end of the line is a mechanism rftating in synchronism with thedistributor and controlling the light from a glow lamp, which is momentarily lighted by each received impulse, to thereby set up the desired number on a translucent screen by means of an optical system.
In the drawings Figure 1 illustrates the preferred form of the invention just referred to;
Fig. 2 is a front view of the ground glass screen of the indicator of Fig. 1 and shows projected thereon a four-digit number; e
Figs. 3 and 4 show analternative arrangement which differs principally from the arrangement of Figs. 1 and 2 in that the indicator employs an opaque revolving disc instead of a cylinder on which appears a transparent arrow which is illuminated by the glow lamp and points to a number on a stationary number plate surrounding the revolving disc, and that, in the vdistributor, instead of the brush making direct contact with the segments, it passes before vthe segments without actually touching them but sumi ciently close to cause an inductive disturbance in an associated output ampliiier circuit.
A detailed description of the invention will now be given.
` Referring to Fig. 1 of the drawings, 1 is a rotary distributor similar to equipment employed in printing telegraphy, etc. having a plurality of 6, contact segments 2 wiped over by brush arm 3 driven at a rate of speed, of the order of 6000 revolutions per minute, through the medium of a shaft 4 by a motor 5. A grounded battery is connected to the brush arm 3. The number of dstributor segments or contacts is determined by the number of digits in the number to be transmitted and assuming a four digit number, a minimum of forty segments is required.
Associated with the distributor, and assuming provisions for transmitting a four-digit number, are four selective switches 6-U, 6-T, 6-H, and -TH, each of which consists of a bank of ten contacts, one contact for each of the ten digits in the units, tens, hundreds, and thousands groups. These switches may be well-known stepby-step switches used in automatic telephony,
'each having a movable contact arm or brush adapted to be set on any desired one of the ten segments'by well-known means controlled by a dial or operators keyboard, not shown. Each of the forty switch contacts is individually wired to one of the distributor segments, as shown.
The contact arms of the switches are connected in multiple to one terminal of a winding of a transformer or repeating coil 7, the other terminal of which is connected to ground.
It will now be obvious that for any setting of the switch arms on the contacts of switches 6-U, 6-T, 6-H, and-TI-I, the brush arm 3 of the distributor in making one complete revolution will close a circuit from battery through the winding of transformer '7, four times, i. e., when the brush contacts with segments 1', 12, 23 and 9 34, thereby transmitting four alternating current impulses over the line L in which may be located amplifiers 9 and 11 for compensating i'or losses occasioned by the characteristics of the line and equipment, indicated at 8 and 9, through 10o which the current impulses must pass. v
At the distant end of the line a second transformer 12 may be inserted, the secondary winding of which is connected to the terminals of a neon tube or lamp 13, which has the property of responding promptly to the connection and disconnection of electrical potential.
Surrounding the lamp 13 is an opaque cylinder 14 rotating on a shaft and driven by a motor 16 which operates in synchronism with the motor no 5 at the transmitting end of the line. Any suitable means well known in the ait, such as used in printing telegraphy, may be employed for maintaining the two motors in synchronism, for example, a line 19 terminating in synchronizing equipment 17 associated with each motor .may be utilized, but as the method of synchronizing forms no part of the present invention, it has not been described in any detail.
Around the circumference of the cylinder 14 are ,four rows of translucent digits 21-TH, 21-H, 21 T and 21-U and so staggered that a line drawn at any point on the cylinder, parallel to its axis, would pass through but one digit.
Behindihe neon lamp 13 is a reflector 20 arranged so as to cause a narrow band of light to shine onthe inner surface of the cylinder parallel to its axis.. Obviously, this band of light will illuminateffthe translucent digit which is oppositjthis .point in the Cylinder at the instant the lamp is lighted.
Outside the cylinder and in line with each row of digits is a stationary lens 22 and in front of the row of lenses is a stationary ground glass screen. The lenses 22 are so constructed and arranged as to project, on the screen, the illuminated digit somewhat enlarged in size,
' Due to the speed of the distributor or impulser at the transmitting station, which as before stated is of the order of revoluions per second, the lamp 13 will be illuminated and extinguished so rapidly that the eye is unable to distinguish the flashes and it therefore appears as a steady light. Now if the cylinder 14 is in such a position that digit 1 of row 21-TH is opposite the lamp 13 and reflector 20 at the instant distributor arm 3 passes'over segment 1 of the distributor, and assuming that the brush of selective switch G-TH is set on conact l, the digit 1 will be illuminated and projected onthe screen 23, where it will be visible to an operator and if the cylinder rotates in synchronism with the arm of the transmitting distributor or impulser and the digits are properly spaced around the circumference of the cylinder, this digit will continue to be displayed so rapidly as to appear as a steady number on the screen as long as the selective switch is set on contact 1 or until the circuit is broken in some other manner.
Now, for example, if the brushes of switches 6-TH, -H, 6-T and 6-U representing the thousands, hundreds, tens and units digits of a number to be transmitted are set on contacts l, 2, 3 and 4, respectively, to transmit the number 1234, these same respective digits on the cylinder 14 will be successively illuminated as they pass in front of the lamp 13 and will be individually projected on the screen 23, as shown in Fig. 2.
In case it is desired to transmit a party line code designation, such as the letters W, R, M or- J, a fifth switch, not shown, and four additional segments would be required at lthe transmitting station and a fifth row of translucent digits and a corresponding lens would be required in connection with the indicator.
An alternative arrangement embodying the same fundamental principles as previously described is shown in Figs. 3 and 4.
Referring to Fig. 3 a single rotary segment at the outer end of the distributor arm 3, driven by the"`motor 5, passes before each of the stationary contacts 2, but does not actually come in contact therewith.
In each lead from the segments to the contacts of the selector switches 6--TH, 6--H, 6-T,
B-U and 6-C, an amplifier 23, 23', 232, etc.. irs introduced. These amplifiers consist of -a vacuum tube having a grid battery C and a plate battery B together with an associated output coil 25. 'I'he rotating segment of the distributor is connected to battery andas it passes before any one of the stationary segments, the potential of that segment, as determined by the C battery of the corresponding amplifier 23 is changed by virtue of the fact that the high resistance R, which serves as a grid leak, is introduced in series with the grid battery.
The battery connected to the rotary segment is, of course, of a different potential than the C battery of the amplifier, and consequently, the potential on the grid G of any particular tube is increased when the rotating member of the distributor passes the stationary contact to which the grid is connected and is restored to normal after the rotating member has passed by the segment in question.
This change of grid potential causes a single ampliedimpulse to be sent to the associated selector switch, such as -TH. The switches -TI-I, 6-H, etc. are set in accordanceI with any desired number, and party line designation, as, for example, 1234.1, bythe action of a dial or operators keyboard as previously mentioned.
From the brushes or contact arms of the switches 6--'IH, etc. leads are run to vacuum tubes 244, 243, etc., which serve as one-way paths for the current impulses. The plate circuits of all these tubes are connected in parallel with output transformer 7.
Without the use of these one-way tubes in the selector switch brush leads, it would be possible, for example, for a pulse incoming to contact l of the switch 6--TH to cause a change in potential on contact 2 of 6-H, contact 3 of S-T, contact 4 of 6-U and contact J of 6-C, thereby effecting, falsely, the contacts of other multiple selective switches which are also adapted to control impulses from the common distributor or impulser 1.
The one-Way tubes 24, etc., are provided with a C battery C2 and a resistance R2 for the purpose of maintaining the potential of the associated selective switch brush at normal while it is being rotated during the setting operation.
The secondary winding of the transformer 7 is connected to the line L which may be equipped with additional amplifiers 9 and 11.
Wires from the secondary winding of transformer 12 are run to a circular-shaped neon tube or lamp 13 which is lighted `for each digit transmitted as in the previously described arrangement.
The neon lamp is inclosed in a casing 20. In front of the lamp is a plate 14 which is opaque except for a transparent arrow 22. This plate is rotated by a motor 16 which operates in synchronism with the motor 5 of the transmitting distributor or impulser l.
A stationary circular number plate 21 is mounted on the casing 20 and surrounding the rotating plate 14. On this number plate is indicated the units, tens, hundreds and thousands digit of a four-digit number and also the four party letters, W, R, M and J, or any other desired code.
With motors 5 and 16 operating in synchronism the transparent varrow is steadily illuminated and points to the digit or a letter corresponding to the setting of the selective switch. Five steady illuminated arrows (Fig. 4) will point to the digits and letter corresponding to the setting of the selective switches 6-TH, 6-H, etc.
It is understood that the distributor of either Fig. 1 or Fig. 3 may serve as a common impulse device for a number of groups of selector switches 6.
What is claimed is:
1. In a telephone call indicating system, a transmitting station, a receiving station, a line interconnecting them, a mechanism at the transmitting station including a rotary distributor for selectively transmitting to the line a cyclically recurring succession of electrical impulses selectively spaced within the cycle in accordance with a predetermined code corresponding to a plurality of characters which it is desired to simultaneously indicate at the receiving station, said cyclic impulses being transmitted at such a rate that they will be repeated within a time interval not greater than the period of persistence of vision, and a mechanism at the receiving station operating in synchronism with the transmitting distributor for luminously displaying in a row, due to persistence in vision, the plurality of characters transmitted.
2. In a telephone call indicating system, a transmitting station, a receiving station, a line interconnecting them, a mechanism at the transmitting station including a rotary distributor for selectively transmitting to the line a cyclically recurring succession of electrical impulses selectively spaced within the cycle in accordance with a,predetermined code corresponding to a plurality of characters which it is desired to simultaneously indicate at the receiving station, said cyclic impulses being transmitted at such a rate that they will be repeated within a time interval not greater than the period of persistence of vision, and a mechanism at the receiving station including an opaque cylinder rotating in synchronism with the distributor at the transmitting station, a plurality of staggered sets of transparent openings arranged in circumferential rows in the cylinder wall, the openings of each set having different characteristic shapes corresponding to the characters to be indicated, a glow lamp connected to the line and positioned within the cylinder, and stationary means associated with the cylinder for restricting instanianeous visibility of said openings to a single row.
3. In a telephone call indicating system, a transmitting station, a receiving station, a line' interconnecting them, means at the transmitting station for producing and selectively transmitting a cyclically recurring succession of electrical impulses spaced within the cycle in accordance with a predetermined code corresponding to a plurality of characters which it is desired to simultaneously indicate at the receiving station, said impulses being transmitted at such a rate that they will be repeated cyclically within a time interval not greater than the period of persistence of vision, said means including a rotating distributor for transmitting the impulses to the line and a selector switch adapted to be set to determine the spacing of the impulses transmitted, and a mechanism at the receiving station including an opaque cylinder rotating in synchronism with the distributor at the transmitting station, variously shaped transparent openings in the cylinder wall each representing one of the characters which are to be transmitted, a glow lamp connected to the line and so adapted and positioned within the cylinder as to illuminate said transparent openings with each impulse, and means including a screenand a system of lenses positioned adjacent said cylinder, said openings being so disposed around the Wall' of said cylinder and said lens system and screen so disposed with respect to the cylinder that during the transmission of character impulses the plurality of characters corresponding to the impulses transmitted will appear in a row on said screen.
4. In a telephone call indicating system, a line, means at one end thereof for producing and transmitting to said line a cyclically recurring succession of electrical impulses selectively spaced within the cycle in accordance with a predetermined code corresponding to a plurality of characters which it is desired to simultaneously indicate at the other end of the line, said means including a rotating device for transmitting said impulses at such a rate that each cyclic impulse will be repeated within a time interval not greater than the period of persistence of vision, an indicating mechanism at the other end of the line including a rotatable opaque screen, means for rotating said screen in synchronism with the means at the transmitting station, a transparent indicator opening in the opaque screen, an electric glow lamp associated with the line and made active by said line impulses, said lamp being so positioned with respect to said screen as to illuminate said opening, and stationary means cooperating with said rotating screen, and bearing representations of the characters which are to be transmitted, said character representations being so positioned that when the opening in said screen is illuminated, character representations on said stationary members will be simultaneously indicated, due to the persistence of vision, which correspond to the code of impulses transmitted.
5. In a telephone call indicator for transmitting and indicating characters, means including a rotating member for producing and selectively transmitting to a line a cyclically recurring succession of electrical impulses selectively spaced within the cycle in accordance with a plurality of desired characters to be transmitted and at a cyclic rate such that each impulse will be repeated within a time interval not greater than the period of persistence of vision and means for receiving said impulses and indicating said character comprising an opaque screen revolving in synchronism with the rotating member at the transmitter, a plurality of staggered rows of transparent openings in said screen, the openings of each row being of various shapes to represent the characters transmitted, a glow lamp responsive to the line impulses and so positioned as to illuminate the transparent openings and a stationary member so positioned with respect to the screen as to restrict instantaneous visibility of said illuminated openings to a single row.
HENRY M. BASCOM.
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US2944471A (en) * 1953-04-22 1960-07-12 Phototypograph Corp Composing apparatus
US2959638A (en) * 1955-06-03 1960-11-08 Sperry Rand Corp Magnetic printer
US3007380A (en) * 1957-08-28 1961-11-07 Lichtdrukpapierfabriek De Atla Method and a machine for utilizing accounting and similar data
DE1247053B (en) * 1962-03-08 1967-08-10 Anelex Corp Quick printing device
DE1264833B (en) * 1960-11-25 1968-03-28 Potter Instrument Co Inc Drum or chain high-speed printer
DE1267007B (en) * 1964-12-04 1968-04-25 Raytheon Co Device for displaying a message
US3850097A (en) * 1962-03-08 1974-11-26 Mohawk Data Sciences Corp High speed printers with staggered fonts

Cited By (42)

* Cited by examiner, † Cited by third party
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US2580740A (en) * 1940-01-20 1952-01-01 Ibm Accounting apparatus
US2418406A (en) * 1943-08-12 1947-04-01 American Telephone & Telegraph Selective signaling system
US2431651A (en) * 1943-08-28 1947-11-25 Rca Corp Tape printer
US2426245A (en) * 1943-10-09 1947-08-26 Bell Telephone Labor Inc Time and distance measuring system
US2516936A (en) * 1943-11-01 1950-08-01 Standard Telephones Cables Ltd Signal pulse responsive facsimile receiving system
US2427355A (en) * 1944-02-12 1947-09-16 Keinath George Flash print recorder
US2486406A (en) * 1944-07-11 1949-11-01 Higonnet Rene Photographic type composing machine having stroboscopic character scanning system
US2475497A (en) * 1944-11-15 1949-07-05 Harris Seybold Co Phototypograph film advancing and flash control means
US2510485A (en) * 1945-11-08 1950-06-06 Standard Electronic Res Corp Electrical measuring system
US2648832A (en) * 1946-09-03 1953-08-11 Ervin G Johnson Time system
US2790362A (en) * 1946-12-26 1957-04-30 Graphic Arts Res Foundation In Photo composing machine
US2510093A (en) * 1947-02-17 1950-06-06 Farnsworth Res Corp Stroboscopic telemetering apparatus
US2896523A (en) * 1947-06-07 1959-07-28 Harris Intertype Corp Phototypograph
US2725803A (en) * 1947-06-07 1955-12-06 Cecil L Tansel Photographic composing apparatus
US2666911A (en) * 1948-01-12 1954-01-19 Marchant Calculators Inc Changeable exhibitor
US2599005A (en) * 1948-04-07 1952-06-03 Automatic Temperature Control Co Inc Plural scale indicator
US2787654A (en) * 1948-07-29 1957-04-02 Walter E Peery Electronic photo-typecomposing system
US2865270A (en) * 1949-01-12 1958-12-23 Graphic Arts Res Foundation In Photocomposing apparatus
US2676085A (en) * 1949-02-02 1954-04-20 Nielsen A C Co Apparatus for indicating instantaneously and at a remote point the tuning condition of one or more wave signal receivers
US2676084A (en) * 1949-02-02 1954-04-20 Nielsen A C Co Apparatus for indicating instantaneously and at a remote point the tuning condition of one or more wave signal receivers
US2713456A (en) * 1949-10-24 1955-07-19 Marchant Calculators Inc Machine for translating binary values to decimal values
US2714199A (en) * 1950-02-25 1955-07-26 Itt Projection display apparatus
US2755163A (en) * 1950-03-02 1956-07-17 Nielsen A C Co Recording device
US2831410A (en) * 1950-10-09 1958-04-22 Lester M Walden Equipment for type setting
US2633297A (en) * 1950-12-29 1953-03-31 Monroe Calculating Machine Stroboscopic indicator
US2720642A (en) * 1951-05-26 1955-10-11 Ibm Flashtube ignition circuit for record controlled machines
US2739304A (en) * 1952-04-05 1956-03-20 Research Corp Indicating device
US2779655A (en) * 1952-12-01 1957-01-29 Honeywell Regulator Co Graphical to digital indication converter
US2944471A (en) * 1953-04-22 1960-07-12 Phototypograph Corp Composing apparatus
US2745092A (en) * 1953-04-23 1956-05-08 Ohio Commw Eng Co Stroboscopic visual intelligence presenter
US2818172A (en) * 1953-06-12 1957-12-31 British Timken Ltd Electro-optical measuring, testing or grading apparatus
US2784397A (en) * 1954-01-15 1957-03-05 Bell Telephone Labor Inc Number display device
US2889546A (en) * 1954-05-21 1959-06-02 Toledo Scale Corp Electronic counter readout device
US2740106A (en) * 1954-10-26 1956-03-27 Sperry Rand Corp Private line communication system
US2959638A (en) * 1955-06-03 1960-11-08 Sperry Rand Corp Magnetic printer
US2907020A (en) * 1955-10-10 1959-09-29 Bendix Aviat Corp Digi-graphic recorder
US2927960A (en) * 1956-03-29 1960-03-08 Teletype Corp Telegraph system
US3007380A (en) * 1957-08-28 1961-11-07 Lichtdrukpapierfabriek De Atla Method and a machine for utilizing accounting and similar data
DE1264833B (en) * 1960-11-25 1968-03-28 Potter Instrument Co Inc Drum or chain high-speed printer
DE1247053B (en) * 1962-03-08 1967-08-10 Anelex Corp Quick printing device
US3850097A (en) * 1962-03-08 1974-11-26 Mohawk Data Sciences Corp High speed printers with staggered fonts
DE1267007B (en) * 1964-12-04 1968-04-25 Raytheon Co Device for displaying a message

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