US3317660A - Printing telegraph motor start-stop mechanism - Google Patents
Printing telegraph motor start-stop mechanism Download PDFInfo
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- US3317660A US3317660A US300485A US30048563A US3317660A US 3317660 A US3317660 A US 3317660A US 300485 A US300485 A US 300485A US 30048563 A US30048563 A US 30048563A US 3317660 A US3317660 A US 3317660A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L13/00—Details of the apparatus or circuits covered by groups H04L15/00 or H04L17/00
- H04L13/02—Details not particular to receiver or transmitter
- H04L13/04—Driving mechanisms; Clutches
Definitions
- This invention relates to motor control circuits for printing telegraph systems and more particularly to motor start-stop circuits for telegraph printers.
- Another object of the invention is to provide a simple and inexpensive motor start-stop mechanism for a telegraph printer.
- Still further object of the invention is the provision of a simple motor start-stop circuit for printing telegraph receivers which is responsive to remotely generated line signals.
- the driving motor of a printing telegraph receiver is con nected to and disconnected from its current source by one brush of a rotary switch which maybe stepped from one static position to another by an actuating electromagnet that is normally held energized in series with the selector magnet of the telegraph receiver by a marking (current) condition on the telegraph line.
- a second brush of the rotary switch serves in one of the static conditions of the switch to connect the actuating electromagnet in series with the selector magnet and in a second of the static conditions to disconnect the actuating electromagnet from its series relation with the selector magnet.
- the third brush of the rotary switch in its respective static conditions, prepares and disables an auxiliary circuit for the actuating electromagnet for completion by a signal controlled contact responsive to a predetermined code combination of signals received by the selector magnet.
- the actuating electromagnet is rendered operative to step the rotary switch from one static position to another upon the receipt in the telegraph receiver of a spacing (no current) condition on the telegraph line followed by a marking condition on the telegraph line or upon the alternative receipt of the predetermined code combination in the receiver.
- a spacing condition on the signal line followed by a marking condition serves to start the motor through the operation of the actuating electromagnet and the receipt of the predetermined code combination of signals servesto disconnect the drive motor from its current source.
- a motor 1 which may drive a printing telegraph receiver unit of the type illustrated in Patent No. 2,505,729, issued Apr. 25, 1950, to W.” J. Zenner.
- a selector magnet 2 which is the equivalent of the selector magnet'13 of said Zenner patent.
- the receiver is equipped with a function control mechanism of the type disclosed in Patent No. 2,667,533 issued Jan. .26, 1954, to W. J. Zenner which function control mechanism comprises a function pawl 3 and a function operating lever 4 which are the equivalent of the function pawl 244 and function operating lever 246 of Patent No. 2,667,533 mentioned hereinbefore.
- These two patents disclose a suitable receiver of the general type to which the present invention pertains and are incorporated herein by reference as though completely described in detail.
- the motor 1 is designed to be supplied with current from a suitable voltage source 5. Upon the receipt in the receiver of a spacing line signal followed, after a suitable interval, by a marking signal, the motor will be started and as disclosed in detail in the patent to W. J. Zenner, 2,505,729, the selector magnet 2 will respond to signals from a telegraph signal line 6. In the normal condition of the telegraph line 6 a marking condition is maintained, that is, current is applied to the line when no messages are being transmitted and this current will maintain the selector magnet 2 energized.
- a rotary switch which comprises a slow to release electromagnet 7 having an armature 8 which upon energization of the electromagnet 7 will move a pawl 9 to the position shown in the drawing.
- a ratchet 10 Positioned for cooperation with the pawl 9 is a ratchet 10 fixed to a shaft 11 which drives three brushes 12, 13 and 14 step-by-step over switch contacts 12-1 through 12-8, 13-1 through 13-8 and 14-1 through 14-8, respectively, in unison.
- the selector magnet 2 When a spacing signal is received over the line 6 the selector magnet 2 will be deenergized and the just described circuit, through brush 13 and leads 20 and 21, will be broken to release the actuating electromagnet 7, provided the break in the circuit or spacing pulse is of sufiicient duration.
- the electromagnet 7 is made slow to release so that it will not react to line hits such, for example, as might be caused by lightning. If, after a proper interval of time, the signal line is returned to a marking or current condition after the electromagnet 7 has been released, the pawl 9 will be actuated and will step the ratchet 10 one step due to the release and reenergization of the electromagnet 7.
- the energization of the electromagnet 7 will step the ratchet one step to move the brushes 12, 13 and 14 to the position where they will interconnect their respective contacts 4 and 8, that is, the brush 12 will interconnect contacts 12-4 and 12-8; brush 13 will interconnect contacts 13-4 and 13-8; and brush 14 will interconnect contacts 14-4 and 14-8.
- This will break the series connection between the selector magnet 2 and the actuating electromagnet 7 at brush 13 and will complete a circuit from the source 5 through contact 14-8, brush 14, contact 14-4 and through the motor 1 to initiate operation of the motor.
- the brush 13 upon its release and re-energization, the brush 13 will interconnect its contacts 13-4 and 13-8 to prepare a circuit from one side of the signal line 6 through the selector magnet 2, a lead 22, contact 138, brush 13, contact 13-4 and back to the other side of the signal line 6 through lead 23. This will condition the selector magnet 2 to receive marking or spacing signals and respond thereto to control the printing telegraph receiver.
- the brush 12 in moving to position to interconnect its contacts 12-4 and 12-8 will complete a circuit from one side of the winding of the actuating electromagnet over lead 21 through contact 1-28, brush 12, contact 12-4 and a lead 24 to one side of an auxiliary source of current 25, the other side of which is connected to a movable contact 26.
- the movable contact 26 will remain in the position shown in the drawing during the reception of code combinations of signals representing messages but upon the receipt of a predetermined code combination of signals, the function pawl 3 will be operated and as a consequence thereof will rock the function operating lever 4 in a counterclockwise direction whereby the contact 26 will be moved to engage a stationary contact 27 that is connected through a lead 28 to the opposite side of the actuating electromagnet 7. This will cause the operation of the electromagnet 7 which had been deenergized when the series circuit for it and the selector magnet 2 was broken.
- a motor control circuit for printing telegraph apparatus having a selector magnet connected to a transmission line for controlling printing and function operations of the apparatus and also having a motor for supplying power to effect such controlled operations comprising (a) switching means having a normally energized driving magnet operable upon de-energization followed by re-energization for switching a plurality of connections from one condition to another,
- a motor control circuit for printing telegraph apparatus having a selector magnet connected to a transmission line for controlling printing and function operations of the apparatus and also having a motor for supplying power to effect such controlled operations comprising (a) a multi-brush rotary switch having a driving magnet for stepping said brushes from one position to another in unison,
- second circuit means including a second of said brushes in said other position for establishing a circuit path to connect said selector magnet and said driving magnet in series with the transmission line and in said one position to break said series connection and establish another path to connect only the selector magnet to the transmission line,
- a motor control circuit for printing telegraph apparatus having a selector magnet connected to a transmission line for controlling printing and function operations of the apparatus and also having a motor for supplying power to effect such controlled operations comprising (a) a three brush rotary switch having a driving magnet operable upon de-energization followed by reenergization for stepping said brushes from one position to another in unison,
- circuit means including one of said brushes for supplying power to said motor
- circuit means including a second of said brushes for normally establishing a path to connect said selector magnet and said driving magnet in series in the transmission line and operable to break said series connection and establish another path to connect only the selector magnet to the transmission line,
- a motor control circuit for printing telegraph apparatus having a selector magnet connected to a transmission line for controlling printing and function operations of the apparatus and also having a motor for supplying power to effect such controlled operation comprising (a) an electromagnet,
- circuit means connected to the circuit connections associated with one of said devices for connecting and disconnecting said motor to a source of power
- circuit means connected to another plurality of circuit connections associated with another of said devices for normally maintaining a series connection from the signal line through the selector magnet and said electromagnet, and
- circuit means connected to the plurality of circuit connections associated with a third of said devices and responsive to code combinations of signals on said line for connecting an alternate source of current to actuate the electromagnet.
- a motor control circuit for printing telegraph apparatus having a selector magnet connected to a transmission line for controlling printing and function operations of the apparatus and also having a motor for supplying power to effect such controlled operations comprising (a) an electromagnet,
- circuit means connected to the contacts associated with one of said brushes for connecting and disconnecting said motor to a source of power
- circuit means connected to another group of contacts associated with another brush for normally maintaining a series connection from the transmission line through the selector magnet and said electromagnet, and
- circuit means connected to yet another group of contacts associated with a third brush and responsive to code combinations of signals on said line for connecting an alternate source of current to actuate the electromagnet.
- a motor control circuit for printing telegraph apparatus having a selector magnet connected to a transmission line for controlling printing and function operations of the apparatus and also having a motor for supplying power to effect such controlled operations comprising (a) a stepping switch including an electromagnet,
- (g) means responsive to code combinations of signals for completing the thus prepared circuit.
- a motor control circuit for printing telegraph apparatus having a motor for supplying power to the ap- 5 paratus connected to a signal line and including (a) an electromagnet,
- circuit means connected to the circuit connections associated with a first one of said devices for connecting and disconnecting said motor to a source of power
- (f) means connected to second circuit connections associated with one of said devices other than said first one of the devices for energizing the electromagnet from a separate source of current irrespective of the signals present on the signal line.
- a motor control circuit for printing telegraph apparatus connected to a transmission line and having a motor for supplying power to the apparatus including (a) an electromagnet,
- circuit means connected to the contacts associated with a first one of said brushes for connecting and disconnecting said motor to a source of power
- (g) means connected in series with contacts associated with a brush other than the first brush for providing an alternate path from a separate source of current for actuating the electromagnet.
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Description
P. R. SIMMS 3,317,660
May 2, 1967 Filed Aug. 7, 1965 INVENTOR PAUL R. SIMMS BY ML ATTORNEY United States Patent 3,317,660 PRINTING TELEGRAPH MOTOR START-STOP MECHANISM Paul R. Simms, Mount Prospect, 11]., assignor to Teletype Corporation, Skokie, Ill., a corporation of Delaware Filed Aug. 7, 1963, Ser. No. 300,485 8 Claims. (Cl. 1784.1)
This invention relates to motor control circuits for printing telegraph systems and more particularly to motor start-stop circuits for telegraph printers.
It is an object of the present invention to simplify the circuits which control the driving motor of a printing telegraph receiver.
Another object of the invention is to provide a simple and inexpensive motor start-stop mechanism for a telegraph printer.
-A still further object of the invention is the provision of a simple motor start-stop circuit for printing telegraph receivers which is responsive to remotely generated line signals. 7
In accordance with one embodiment of the invention the driving motor of a printing telegraph receiver is con nected to and disconnected from its current source by one brush of a rotary switch which maybe stepped from one static position to another by an actuating electromagnet that is normally held energized in series with the selector magnet of the telegraph receiver by a marking (current) condition on the telegraph line. A second brush of the rotary switch serves in one of the static conditions of the switch to connect the actuating electromagnet in series with the selector magnet and in a second of the static conditions to disconnect the actuating electromagnet from its series relation with the selector magnet. The third brush of the rotary switch in its respective static conditions, prepares and disables an auxiliary circuit for the actuating electromagnet for completion by a signal controlled contact responsive to a predetermined code combination of signals received by the selector magnet.
The actuating electromagnet is rendered operative to step the rotary switch from one static position to another upon the receipt in the telegraph receiver of a spacing (no current) condition on the telegraph line followed by a marking condition on the telegraph line or upon the alternative receipt of the predetermined code combination in the receiver. A spacing condition on the signal line followed by a marking condition serves to start the motor through the operation of the actuating electromagnet and the receipt of the predetermined code combination of signals servesto disconnect the drive motor from its current source.
A more complete understanding of the invention may be had by reference to the following detailed description when considered in conjunction with the accompanying drawing wherein the single figure comprises a schematic illustration of the mechanism comprising a preferred form of the invention.
In the drawing, a motor 1 is shown which may drive a printing telegraph receiver unit of the type illustrated in Patent No. 2,505,729, issued Apr. 25, 1950, to W." J. Zenner. In this. receiver there is provided a selector magnet 2 which is the equivalent of the selector magnet'13 of said Zenner patent. In addition to the motor 1 and selector magnet 2 the receiver is equipped with a function control mechanism of the type disclosed in Patent No. 2,667,533 issued Jan. .26, 1954, to W. J. Zenner which function control mechanism comprises a function pawl 3 and a function operating lever 4 which are the equivalent of the function pawl 244 and function operating lever 246 of Patent No. 2,667,533 mentioned hereinbefore. These two patents disclose a suitable receiver of the general type to which the present invention pertains and are incorporated herein by reference as though completely described in detail.
The motor 1 is designed to be supplied with current from a suitable voltage source 5. Upon the receipt in the receiver of a spacing line signal followed, after a suitable interval, by a marking signal, the motor will be started and as disclosed in detail in the patent to W. J. Zenner, 2,505,729, the selector magnet 2 will respond to signals from a telegraph signal line 6. In the normal condition of the telegraph line 6 a marking condition is maintained, that is, current is applied to the line when no messages are being transmitted and this current will maintain the selector magnet 2 energized.
In order to initiate a receiving operation of the receiving printer, the motor 1 must be started before signals are transmitted over the line 6 to the printer and as just pointed out this initiation of the operation of the motor 1 will take place upon the receipt of a spacing signal over the line followed by a marking signal. In order to eifect this operation a rotary switch is provided which comprises a slow to release electromagnet 7 having an armature 8 which upon energization of the electromagnet 7 will move a pawl 9 to the position shown in the drawing. Positioned for cooperation with the pawl 9 is a ratchet 10 fixed to a shaft 11 which drives three brushes 12, 13 and 14 step-by-step over switch contacts 12-1 through 12-8, 13-1 through 13-8 and 14-1 through 14-8, respectively, in unison.
In the normally quiescent condition of the telegraph line 6 a marking condition will prevail whereby current will flow from the line 6 through the selector magnet 2, the contact 13-1, brush 13, contact 13-5, through the winding of the electromagnet 7 and back to the other side of the signal line. Thus, when no messages are being transmitted over the line, that is, when the apparatus is in its normal condition, the electromagnet 7 will be held energized in series with the selector magnet 2. This circuit will extend from one side of the line 6 through the selector magnet 2, brush 13, interconnected contacts 13-1 and 13-5, over a lead 20 through the actuating electromagnet 7 and a lead 21 to the other side of the signal line 6. With the rotary switch in this position the brush 14 will be in a position where it is in contact with contacts 14-1 and 14-5 thus holding open the circuit from the 117 volt A.C. source at 5 to the motor 1. Similarly, the brush 12 will be in contact with contacts 12-1 and 12-5 to maintain an open circuit at this brush.
When a spacing signal is received over the line 6 the selector magnet 2 will be deenergized and the just described circuit, through brush 13 and leads 20 and 21, will be broken to release the actuating electromagnet 7, provided the break in the circuit or spacing pulse is of sufiicient duration. The electromagnet 7 is made slow to release so that it will not react to line hits such, for example, as might be caused by lightning. If, after a proper interval of time, the signal line is returned to a marking or current condition after the electromagnet 7 has been released, the pawl 9 will be actuated and will step the ratchet 10 one step due to the release and reenergization of the electromagnet 7. The energization of the electromagnet 7 will step the ratchet one step to move the brushes 12, 13 and 14 to the position where they will interconnect their respective contacts 4 and 8, that is, the brush 12 will interconnect contacts 12-4 and 12-8; brush 13 will interconnect contacts 13-4 and 13-8; and brush 14 will interconnect contacts 14-4 and 14-8. This will break the series connection between the selector magnet 2 and the actuating electromagnet 7 at brush 13 and will complete a circuit from the source 5 through contact 14-8, brush 14, contact 14-4 and through the motor 1 to initiate operation of the motor. 1
' On this first operation of the electromagnet 7, that is,
upon its release and re-energization, the brush 13 will interconnect its contacts 13-4 and 13-8 to prepare a circuit from one side of the signal line 6 through the selector magnet 2, a lead 22, contact 138, brush 13, contact 13-4 and back to the other side of the signal line 6 through lead 23. This will condition the selector magnet 2 to receive marking or spacing signals and respond thereto to control the printing telegraph receiver. The brush 12 in moving to position to interconnect its contacts 12-4 and 12-8 will complete a circuit from one side of the winding of the actuating electromagnet over lead 21 through contact 1-28, brush 12, contact 12-4 and a lead 24 to one side of an auxiliary source of current 25, the other side of which is connected to a movable contact 26.
The movable contact 26 will remain in the position shown in the drawing during the reception of code combinations of signals representing messages but upon the receipt of a predetermined code combination of signals, the function pawl 3 will be operated and as a consequence thereof will rock the function operating lever 4 in a counterclockwise direction whereby the contact 26 will be moved to engage a stationary contact 27 that is connected through a lead 28 to the opposite side of the actuating electromagnet 7. This will cause the operation of the electromagnet 7 which had been deenergized when the series circuit for it and the selector magnet 2 was broken. This will cause the brushes 12, 13 and 14 to be moved into position to interconnect their respective contacts 12-3 and 12-7, 13-3 and 13-7, and 14-3 and 147, respetcively, thus to restore the circuit to the normal condition where the motor will be disconnected from its current source 5. The electromagnet 7 will again be connected in series with the selector magnet 2 and the receiver will be in a quiescent condition awaiting the receipt of a spacing signal of relatively long duration followed by a marking signal to again start the printer motor 1.
Although a specific embodiment of the invention is shown in the drawings and described in the foregoing specification, it will be understood that invention is not limited to the specific embodiment described but is capable of modification and rearrangement and substitution of parts and elements without departing from the spirit of the invention.
What is claimed is:
1. A motor control circuit for printing telegraph apparatus having a selector magnet connected to a transmission line for controlling printing and function operations of the apparatus and also having a motor for supplying power to effect such controlled operations comprising (a) switching means having a normally energized driving magnet operable upon de-energization followed by re-energization for switching a plurality of connections from one condition to another,
(b) first circuit means controlled by said switching means for supplying power to said motor when said switching means is in said other condition,
() second circuit means controlled by said switching means for normally connecting said selector magnet and said driving magnet in series with said transmission line when said switching means is in said one condition and operable to break said series connection and establish another path to connect the selector magnet to the transmission line when said switching means is in said other condition,
(d) third circuit means controlled by said switching means for preparing an alternate circuit path to said driving magnet when said switching means is in said other condition,
(e) an auxiliary source of current in said third circuit means, and
(f) signal responsive means for completing said alternate circuit from the path prepared by said third circuit means.
2. A motor control circuit for printing telegraph apparatus having a selector magnet connected to a transmission line for controlling printing and function operations of the apparatus and also having a motor for supplying power to effect such controlled operations comprising (a) a multi-brush rotary switch having a driving magnet for stepping said brushes from one position to another in unison,
(b) first circuit means including one of said brushes in said one of its positions for supplying power to said motor,
(c) second circuit means including a second of said brushes in said other position for establishing a circuit path to connect said selector magnet and said driving magnet in series with the transmission line and in said one position to break said series connection and establish another path to connect only the selector magnet to the transmission line,
((1) a third circuit means including a third of said brushes in said one position for preparing an alternate circuit path to said driving magnet,
(e) an auxiliary source of current in said third circuit means, and
(f) signal responsive means for completing said alternate circuit over the path prepared by said third brush.
3. A motor control circuit for printing telegraph apparatus having a selector magnet connected to a transmission line for controlling printing and function operations of the apparatus and also having a motor for supplying power to effect such controlled operations comprising (a) a three brush rotary switch having a driving magnet operable upon de-energization followed by reenergization for stepping said brushes from one position to another in unison,
(b) circuit means including one of said brushes for supplying power to said motor,
(c) circuit means including a second of said brushes for normally establishing a path to connect said selector magnet and said driving magnet in series in the transmission line and operable to break said series connection and establish another path to connect only the selector magnet to the transmission line,
(d) a third circuit means including the third of said brushes for preparing an alternate circuit path to said driving magnet,
(e) an auxiliary source of current in said third circuit means, and
(f) signal responsive means for completing said alternate circuit over the path prepared by said third brush.
4. A motor control circuit for printing telegraph apparatus having a selector magnet connected to a transmission line for controlling printing and function operations of the apparatus and also having a motor for supplying power to effect such controlled operation comprising (a) an electromagnet,
(b) a plurality of switching devices actuated by said electromagnet upon de-energization thereof followed by re-energization thereof,
(c) a plurailty of circuit connections associated with each of said devices,
((1) circuit means connected to the circuit connections associated with one of said devices for connecting and disconnecting said motor to a source of power,
(e) circuit means connected to another plurality of circuit connections associated with another of said devices for normally maintaining a series connection from the signal line through the selector magnet and said electromagnet, and
(f) circuit means connected to the plurality of circuit connections associated with a third of said devices and responsive to code combinations of signals on said line for connecting an alternate source of current to actuate the electromagnet.
5. A motor control circuit for printing telegraph apparatus having a selector magnet connected to a transmission line for controlling printing and function operations of the apparatus and also having a motor for supplying power to effect such controlled operations comprising (a) an electromagnet,
(b) pawl and ratchet means actuated by said electromagnet,
(c) a plurality of brushes connected to said pawl and ratchet means for actuation thereby,
(d) a plurality of groups of contacts, a separate group being associated with each of said brushes,
(e) circuit means connected to the contacts associated with one of said brushes for connecting and disconnecting said motor to a source of power,
(f) circuit means connected to another group of contacts associated with another brush for normally maintaining a series connection from the transmission line through the selector magnet and said electromagnet, and
(g) circuit means connected to yet another group of contacts associated with a third brush and responsive to code combinations of signals on said line for connecting an alternate source of current to actuate the electromagnet.
6. A motor control circuit for printing telegraph apparatus having a selector magnet connected to a transmission line for controlling printing and function operations of the apparatus and also having a motor for supplying power to effect such controlled operations comprising (a) a stepping switch including an electromagnet,
(b) first circuit means connectable by said switch and operative in one of the stepped positions of the switch for normally connecting said electromagnet in series with said selector magnet to hold said electromagnet energized, said first circuit means being effective in a second position of said switch for breaking the series connection between the selector magnet and the electromagnet,
(c) second circuit means connectable by said switch and operative in said one position for normally disconnecting said motor from a power source, said second circuit means being operative in said second position for connecting said motor to its power source.
(d) an auxiliary power supply,
(e) a third circuit means connectable by said switch and operative in said one position for disconnecting said electromagnet from said auxiliary power source,
(f) said third circuit means in said second position being operative to prepare an operating path from the auxiliary power source to the electromagnet, and
(g) means responsive to code combinations of signals for completing the thus prepared circuit.
7. A motor control circuit for printing telegraph apparatus having a motor for supplying power to the ap- 5 paratus connected to a signal line and including (a) an electromagnet,
(b) a plurality of switching devices actuated by said electromagnet upon deenergization thereof followed by re-energization thereof,
(c) circuit connections associated with each of said 10 devices,
(d) circuit means connected to the circuit connections associated with a first one of said devices for connecting and disconnecting said motor to a source of power,
(e) means connected to first circuit connections associated with another of said devices for causing the electromagnet to be controlled in accordance with signals present on the signal line, and
(f) means connected to second circuit connections associated with one of said devices other than said first one of the devices for energizing the electromagnet from a separate source of current irrespective of the signals present on the signal line.
8. A motor control circuit for printing telegraph apparatus connected to a transmission line and having a motor for supplying power to the apparatus including (a) an electromagnet,
(b) pawl and ratchet means actuated by said electromagnet,
(c) a plurality of brushes connected to said pawl and ratchet means for actuation thereby,
(d) a plurality of contacts associated with each of said brushes,
(e) circuit means connected to the contacts associated with a first one of said brushes for connecting and disconnecting said motor to a source of power,
(f) means connected to contacts associated with another brush for causing the operation of the electromagnet to be controlled by signals appearing on the transmission line, and
(g) means connected in series with contacts associated with a brush other than the first brush for providing an alternate path from a separate source of current for actuating the electromagnet.
References Cited by the Examiner UNITED STATES PATENTS 2,649,497
NEIL C. READ, Primary Examiner.
THOMAS A. ROBINSON, Examiner.
8/1953 Munck 1784.1
Claims (1)
1. A MOTOR CONTROL CIRCUIT FOR PRINTING TELEGRAPH APPARATUS HAVING A SELECTOR MAGNET CONNECTED TO A TRANSMISSION LINE FOR CONTROLLING PRINTING AND FUNCTION OPERATIONS OF THE APPARATUS AND ALSO HAVING A MOTOR FOR SUPPLYING POWER TO EFFECT SUCH CONTROLLED OPERATIONS COMPRISING (A) SWITCHING MEANS HAVING A NORMALLY ENERGIZED DRIVING MAGNET OPERABLE UPON DE-ENERGIZATION FOLLOWED BY RE-ENERGIZATION FOR SWITCHING A PLURALITY OF CONNECTIONS FROM ONE CONDITION TO ANOTHER, (B) FIRST CIRCUIT MEANS CONTROLLED BY SAID SWITCHING MEANS FOR SUPPLYING POWER TO SAID MOTOR WHEN SAID SWITCHING MEANS IS IN SAID OTHER CONDITION, (C) SECOND CIRCUIT MEANS CONTROLLED BY SAID SWITCHING MEANS FOR NORMALLY CONNECTING SAID SELECTOR MAGNET AND SAID DRIVING MAGNET IN SERIES WITH SAID TRANSMISSION LINE WHEN SAID SWITCHING MEANS IS IN SAID ONE CONDITION AND OPERABLE TO BREAK SAID SERIES CONNECTION AND ESTABLISH ANOTHER PATH TO CONNECT THE SELECTOR MAGNET TO THE TRANSMISSION LINE WHEN SAID SWITCHING MEANS IS IN SAID OTHER CONDITION, (D) THIRD CIRCUIT MEANS CONTROLLED BY SAID SWITCHING MEANS FOR PREPARING AN ALTERNATE CIRCUIT PATH TO SAID DRIVING MAGNET WHEN SAID SWITCHING MEANS IS IN SAID OTHER CONDITION, (E) AN AUXILIARY SOURCE OF CURRENT IN SAID THIRD CIRCUIT MEANS, AND (F) SIGNAL RESPONSIVE MEANS FOR COMPLETING SAID ALTERNATE CIRCUIT FROM THE PATH PREPARED BY SAID THIRD CIRCUIT MEANS.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US300485A US3317660A (en) | 1963-08-07 | 1963-08-07 | Printing telegraph motor start-stop mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US300485A US3317660A (en) | 1963-08-07 | 1963-08-07 | Printing telegraph motor start-stop mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3317660A true US3317660A (en) | 1967-05-02 |
Family
ID=23159294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US300485A Expired - Lifetime US3317660A (en) | 1963-08-07 | 1963-08-07 | Printing telegraph motor start-stop mechanism |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US3317660A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3659047A (en) * | 1970-07-13 | 1972-04-25 | Hans Staffel | Device for printing the elevation coordinates on a map |
| US3800069A (en) * | 1972-11-06 | 1974-03-26 | Teletype Corp | Single step tape reader |
| US4724308A (en) * | 1983-11-02 | 1988-02-09 | Fanuc Ltd. | Rewind control unit for a tape reader |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2649497A (en) * | 1949-01-04 | 1953-08-18 | Creed & Co Ltd | Control of dirving motors of teleprinters |
-
1963
- 1963-08-07 US US300485A patent/US3317660A/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2649497A (en) * | 1949-01-04 | 1953-08-18 | Creed & Co Ltd | Control of dirving motors of teleprinters |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3659047A (en) * | 1970-07-13 | 1972-04-25 | Hans Staffel | Device for printing the elevation coordinates on a map |
| US3800069A (en) * | 1972-11-06 | 1974-03-26 | Teletype Corp | Single step tape reader |
| US4724308A (en) * | 1983-11-02 | 1988-02-09 | Fanuc Ltd. | Rewind control unit for a tape reader |
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