US978435A

US978435A - Telegraph-transmitter apparatus.

Info

Publication number: US978435A
Application number: US52318909A
Authority: US
Inventors: Harry G Davis
Original assignee: ELECTRIC PRESS BULLETIN Co
Current assignee: ELECTRIC PRESS BULLETIN Co
Priority date: 1909-10-18
Filing date: 1909-10-18
Publication date: 1910-12-13
Anticipated expiration: 1927-12-13

Description

I 'H. a. DAVIS. TELEGRAPH TRANSMITTER APPARATUS.

APPLICATION IILED'OOT. 18, 1q09.

Patented Dec. 13, 1910.

1 'lransmitter Apparatus,

1 UNITED STATES PATENT OFFICE.

HARRY G. DAVIS, OF WILLIAMSPORT, PENNSYLVANIA, ASSIGNOR TO ELECTRIC PRESS BULLETIN COMPANY, OF WILLIAMSPORT, PENNSYLVANIA, A CORPORATION OF DELAWARE Specification-of Letters Patent.

TELEGRAPH-TRANSMITTER APPARATUS.

Patented Dec. 13, 1910.

Application filed October 18, 1909. Serial No. 623,189.

To all whom it may concern:

citizen of the UnitedStates, and resident of \Vdliamspor-t, Lycomin county, State of Pennsylvania, have ma e certaln newand useful Inventions Relatin to Telegraphlowing is a speci cation, taken in connection with the accompanying drawings,'forn11ng part of the same.

' This invention relates to telegraph transmitter apparatus and relates especially to transmitting apparatus for actuating'telegraph printers of the type described in the application of Campbell and Davis, 162,059, filed November 11, 1908. r v

In the accompanying drawings showing in a somewhat diagrammatic manner an illustrative embodiment of this invention. Figure 1 is a transverse sectional viewof the transmitter; Fig. 2 is a longitudinal section thereof; Fig. 3 is a detailed plan view showing the unison arm mounting.

In the illustrative embodiment of this invention shown in the drawings the transmitter may comprise the pin drum 1 rigidly mounted on the drive shaft 54 which may ,be rotated through the frictional drive clutch 47 or other devices giving a slight torque and allowing slip when the drum is held against rotation. A spirally arranged series of pins 2 are mounted on the drum so as to cooperate with a corresponding se ries of latches 3 mounted on the latch pin 20 .at'the upper end of the latch arms 9 carried at either end of the latch shaft 10 as indicated in Fig. 1. The series of keys 4 5 may be arranged as in a regular typewriter keyboard andpivoted about the key pin T-in the frame member 8. The latches may be connected with the keys in any desired way as by the stirrups (5 loosely connecting each latch with its corresponding key which of course normally held in raised inoperative position-by suitable light wire 17 and is adapted to engage the contact 14 connected to the,wire 18 when the lug is pressed backward by any latch being brought into engagement with the pin on which the fol-' the drum which tends torotate as indicated by the arrow.

The usual unison thread 43 may be mounted on the drive shaft 54 as indicated in Fig. 2 and be engaged by a suitable pin on the unison arm 28 which'also carries the unison stud 26 for engagement with :1 corresponding stud on the unison crank 56 mounted on the drive shaft. As indicated in Fig. 1 this umison arm 28 is pivotally secured'to the stud 29 and is provided with an inclined cam surface with which the cooperating releasing cam 35on the printing lever 31 is adapted to engage so to raise this unison arm out of cooperation with the unison thread and allow it to swing back into its initial position at the right of this thread in Fig. 2 as is usual so that every time one of the latches comes into engagement and dinal movement by a suitable escapcment bar 33 mounted by the brackets 41 on the rod 34 and engaging the collar (31 on the type wheel, so that the spring 4 2 shown in dotted lines in Fig. 2 normally tends to draw this eseapement bar and typewheel to the right, its n'iovement being limited by the usual typewriter escapement pawls 32nvhich feed the type wheel forward one space whenevc'r the printing lever 31 is oscillated. This printing lever carries the printing bar 36 which is adapted to bring the paper sheet 37 into en agement with the characters on the type wieel 39 so as to print therefrom, the characters being of course inked by any suitable inking devlce not shown.

A suitable unison lever 23 may be mounted as indicated in Fig. 1 to cooperate with the end of the unison arm 28 when this arm. has been moved to its extreme position in which the stud 2Q engages the unison crank 56 indicated in Figs. 1 and 2, and locks after arm 28 has been moved a predetermined distance sufiicient for instance toallow the drum shaft to make one more revolution. Under these conditions the unison lock or bar 21 supported on the arms 22 is rigidly held belease of the unison arm from ILS extreme operative position. As is indicated in Fig. 2, however,-the lock 21 does not project under the unison key 5 so that this key may under these conditions be readily depressed, throwing down the unison latch 38 so that its inclined or cam surface 103 engages the corresponding unison pin on the stationary drum,

as is indicated in Fig. 1, thus wedging back the latch arms 9 and actuating the contacts and other devices described.

The interrupter or commutator segments 44, 45 may as indicated, be mounted on the drive shaft 54 and electrically energized by the brushes 50, 51 engaging the sleeves 146, 46 respectively so as to positively oralega tively energize the contacts 44, 45 from the batteries or other sources of electricity 48, 49. The

corresponding brushes

144 and 145 are similarly energized by their engagement with the commutator segments 44, 45 to send out the alternating electrical impulses over the lines to the various controller and printing devices at the receiving stations. These alternating impulses normally pass through.

the transmitter resistance 52 so as to transmit moderate selective impulses to the vari- '30 ous selector devices at the receiving station, but when the latch arms are forced back by engagement of any of the latches with the pin drum the contacts 14, 16 are brought into engagement and. complete the shunt circuit through the connected

wires

17, 18, so that a stronger actuating impulse may thus be transmitted to the receiving device. This stronger actuating impulse may as indicated in Fig. 2 operate a suitable signal device, such as the signal lamp 53 connected with each line leading to the corresponding receivingdevice which ma Y comprise a releasing resistance or other means for reducing,-

the current strength and correspondingly affecting the signal device at the sending station when the printing operation is com pleted in the machine connected with that particular line.

It is of course understood that any number of controller and printing devices at different stations may be connected to the same 'transmitter through similar actuating contacts 16 which areoperated by thesan'ic latch lug or projection 19, these actuating contacts being similarly crmrmcted -with corresponding signal la mps and transmitter resistances and with the same or similar interrupter-s 'on the drive shaft 54.

If desired a suitable cushioning device may be connected with the latch to minimize undesira ble impact'when the. transmitter is rapidly operated. This cushioning device may as indicated in Fig. l comprise a suitable pneumatic cylinder 9.6 mounted on the frame and provided With the. adjustable position, so that in this way the desired amount of pneumatic cushioning action may be secured as the latch member is thrown back by. the pin 'drum..

Havlng described this invention in connection with an illustrative embodiment thereof, to the details of which disclosure the invention is not of course to be limited, what is claimed as new and what is desired to be secured by Letters Patent is set'forth in the appended claims.

1. In telegraphtransmitter apparatus, a frictionally operated drive shaft and connected pin drum, a series of pins on said drum, a latch shaft, latch arms connected to said latch, shaft, a latch pin connected to said latch arms, a series of latches mounted erativ'ely connected with said latches, a unison device operated by said drive shaft and comprising a unison arm, a unison lock in the path of said character keys, a connected unison lever in the path of said unison arm and held against movement when saidfunison device is in actuating position, a unison key, a connected unison latchhaving a cam surface coEJ'pera-ting with a unison pin on said drum, a pneumatic cushioning cylinder having an adjustable throttling valve cooperating with one of said latch arms, a

spring pressed piston in said cylinder normally engaging said latch arms to cushion the same, a latchlug-mounted on one of said latch arms, an electrical actuating contact in cotiperating with said latch lug to be closed thereby when said latches are 'a tuated, a type wheel connected with said drive shaft, printing devices cooperating with said type wheel actuated by one of said latch-arms, means including an interrupter mounted on said driveshaft to generate alternating electrical impulses, a trans mitter resistance through which said impulses nori'nally pass to the line and a signal and actuatii'ig circuit comprising a signal lamp and said actuating contact in shunt around said .transi-i'iitter' resistance;

2. ln telegraph transn'iitter apparatus, a frictionally operated drive shaft and corn nected pin drum, :1 series of pins on said drum, a latch shaft, latch. arms connected to said latch shaft, a latch pin connected to said latch arms, a series of latches mounted on said latch pin and coiiperating with the corresponding pins on sa1ddrum,'a corresponding series of. character keys loosely. connected with said latches, a unison device operated by said drive shaftand comprising;

in the path of sand unison arm and held against movement when said unison device 1s 1n actuating position, a unison key, a connected unison latch having a cam. surface cooperating with a unison pin on said drum, a latch lug mountedon one of said latch arms, a'resllient electrical actuating contact in cotiperation with said latch lug to be closed thereby when said latches are actuated, a type Wheel slidingly mounted on said drive shaft, a printer bar and printing lever connected with and actuated by one of said latch arms, a feed device for said type wheel controlled by said printing lever. means comprising an interrupter mounted on said drive shaft to generate alternating electrical impulses, a transmitter resistance through which'said impulses normally pass to the line'and a signal and actuating circuit comprising a signal lamp and said actuating contact in shunt around said transmitter resistance. i

3. In telegraph transmitter apparatus, a

normally operated drive shaft and connected pin drum. a series of pins on said drum, a latch shaft, a latch arm connected to said latch shatt, a latclupin connected to said latch arm, a series of latches mounted on said latch pin and cooperating with the cor; responding pins on said drum, a corresponding series of character keys connected with said latches, a unison device connected to said drive shaft and comprising a unison arm, a unison lock in the path of said character keys having'a connected unison lever in the path of said unison arm and held against movement when said unison device is in actuating position, a unison key, a connected unison latch having an actuating member cooperating with a unison pin on said drum, an electrical actuating contact cooperating with said latch arm to be closed thereby when said latches are actuated. means comprisingan interrupter connected with said drive shaft to generate electrical impulses. a transmitter resistance through which said impulses normally pass to the line. a signal and actiulting circuit comprising a-signal lamp and said actuating contact in shunt around said transmitter resistance.

4. In telegraph transmitter apparatus, a normally operated drive shaft and connect ed pin drum, a series of pins on said drum. a movably mounted latch arm, a latch pin connected to saidplatch arm, a series of latches mounted on said latch pin and cooperating with the corresponding pins on said drum, a corresponding series of character keys loosely connected with said latches,

Mon arm held against movement; whensaid unison device is in actuating position, a unison key, a connected unison, latch havlng a cam surface cooperating with a unison pin on said drum, an clectrical actuating con tact cooperating with said latch arm to be closed thereby when said latches are actuated, means comprising an interrupter -C0llnected to said drive shaft to generate electrical impulses, a transmitter resistance through which said impulses normally pass to the line and a signal and actuating circuit comprising'a signal device and said actuating contact connected in shunt around Si1i( transmitter resistance.

-In telegraph transmitter apparatus, a pin drum, a series of pins on said drum, a latch device and latches connected to said latch device and cooperating with the corresponding pins on said drum, a corresponding series of keys connected with said latches. a pneumatic cushioning device connected with said latch device, an electrical actuating contact. in cooperation with said latch device to be operated thereby when said latches are actuated, means comprising an interrupter connected with said pin drum, to generate electrical impulses, a

transmitter resistance through which said impulses pass to the line and a signal and actuating circuit comprising a signal device and said actuating contact connected in shunt around said transmitter resistance. 6. In telegraph transmitter apparatus, a pin drum provided with pins, a latch device, latches connected to said latch device and cooperating with the corresponding pins on said drum, means to operate said latches. a cushioning device connected to said latch device, an electrical actuating contact cooperating with said latch device to be closed thereby when said latches are actuated and an interrupter connected with said pin drum and said actuating contact.

7.'In telegraph transmitter,apparatus, a pin drum, latches and a latch device coopcrating with said pin drum, a pneumatic cushioning device connected with said latch device, an actuating contact cooperating with said latch device to be operated thereby when said latches are operated and means comprising an interrupter connected with said pin drum and said actuating contact to generate electrical impulses.

8. In telegraph transmitter apparatus, a pin drum. a series of pins on said drum, a latch device, latches connected to said latch device and cooperating with thecorres'ponding pins on said drum, a corresponding series of keys connected with said latches, an electrical actuating contact in cooperation with said latch device to be closed thereby when said latches are actuated, means comprising an interrupter connected with'said pin drum to generate electrical impulses, a

impulses pass to the line and a signal and actuating circuit coinprisin'g a signal deviceand said actuating contact connected in shunt around said transmitter resistance.

7 9.111 telegraph. transmitter apparatus, a. pin drum, a series of pins on said drum, a latcl'i devic-e, latches connected to said latch device, aseries oi keys connectedwith said latches, an electrical contact cooperating with said latch device to beclosed thereby when. said latches are actuated, means conr prising aninterrupter connected'with said pin drum to generate electrical impulses, a transmitter resistance through which said impulses 'normally'pass to the line and a signal and a'ctuatingcircuit comprising a signal device and said actuating contact eonnected in'shunt around said transmitter resistance.

10.111 telegraph transmitter apparatus, a pin' drum provided with pins, a series of keys and latches cooperating with said pin drum, an electrical. actuating contact and means to close said contact when said latches are'actuated, means comprising an interrupter connected \Vltll said pin drum to generate electrical impulses, a transmitter resistance through Which said impulsesnormally pass to the line and a signal and actuating circuit comprising a signal. deviceand said actuating contact connected in shunt around said transmitter resistance.

11-. In telegraph transmitter apparatus. a

electrical actuating contact coiiperating with i said latch device to be closed thereby when said latches are actuated, means comprising an interrupter connected with asid pin drum to generate electrical impulses and a signal and actuating circuit comprising asignal device and said actuating contact totransmit stronger electrical impulses to theline when said-actuating contact is operated.

12'. In telegraph transmitter apparatus, a pin drum provided with pins, a latch device and a connected series of keys and latches cooperating with said pin drum, an electrical actuating contact cooperating with saidiatch device, a cushioning device eooperating with said latch device to cushion its action, means comprising'an interrupter connected with saidpin drum to generate electrical impulses and a signal and a'ctuat- 'ing circuit comprising a signal device and said actuating contact'to transmit'stronger electrical nnpulses to'the line when said actuating contact 1s operated.

transmitter resistance through which said '13. In telegraph transmitter apparatus, a

pin drum provided with pins, a latch device and a connected series-of keys and latches cooperating with said pin drum, an electrical actuating contact cooperating With said latch device to he closed thereby When said latches are actuated, apneumatic cushioning device cooperating with said'latch device, means comprising an interrupter connected with said pin drum to generate electrical impulses and asignal and actuating circuit comprising a signal device and said actuating contact'to transmit stronger electrical impulses to the line when said actuating contact is operated.

14.. In telegraph transmitter apparatus, a I

pin drum provided with pine, a latch device and a connected series of he s and latches cooperating With said pin rum, an electrical. actuating contact coiiperatin'g With said latch device to be closed thereby When said latches are actuated, a pneumatic cushioning cylinder having an adjustable throttling valve and eotiperating With said latch device, means comprising an interrupter connected wlth said pm drum "to generate electrical impulses and a. signal and actuating circuit comprising a signal device and said.

actuating contact to transmit stronger electrical impulses. to the line when; said actuat ing contact is operated.

15. In telegraph transmitter apparatus, a

pin drum. a latch device-cotiperating with said pin drum, a pneumatic cushioning device connected with said latch device, said cushioning device comprising a cushioning cylinder and means to adjust the action of said cushioning cylinder, an actuating contact-coiiperatlng the said latch devlce to be operated thereby when said latches are operated and means comprising an interrupter connected with said pin drum and said actuating. contact to generate electrical impulses. v

16. Intelegraph transmitter apparatus, a pindrum, a latch device 'coiiperating' With said pin drum, a pneumatic cushioning device connected with said latch, device, said cushioning deviceicomprising a cushioning cylinder having an adjustable throttling valve to govern its action, an actuating contact cooperating the said latch'device to be is operated thereby when said latc'hes are oper ated and means comprlsing an interrupter connected withsald pin drum and said actus .ating contact to generate electrical impulses.

. HARRY G. DAVIS. Witnesses:

Finn). WV. Cassm'r,

. ALLAN J. CASSIDY.