US1879524A - Telegraph system and apparatus - Google Patents

Telegraph system and apparatus Download PDF

Info

Publication number
US1879524A
US1879524A US519038A US51903831A US1879524A US 1879524 A US1879524 A US 1879524A US 519038 A US519038 A US 519038A US 51903831 A US51903831 A US 51903831A US 1879524 A US1879524 A US 1879524A
Authority
US
United States
Prior art keywords
transmitter
keyboard
station
key
cam
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US519038A
Other languages
English (en)
Inventor
Salmon Reginald Dennis
Thomas Frank Reginald
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Creed and Co Ltd
Original Assignee
Creed and Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Creed and Co Ltd filed Critical Creed and Co Ltd
Application granted granted Critical
Publication of US1879524A publication Critical patent/US1879524A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/06—Answer-back mechanisms or circuits

Definitions

  • the present invention relates to telegraph systems and apparatus and has more particularly reference to telegraph systems in which 2 stations, means operable on transmission of a particular signal from one station to obtain at that station an indication individual to the station to which it is connected.
  • a keyboard transmitter and a receiving print er at a station are associated with a line circuit, a selector bar in said printer is actuated on receipt of a particular signal over said line, and mechanical means associated with said keyboard transmitter is operable on actuation of the selector bar in said printer to transmit a group of signals characteristic of that transmitter.
  • a printing telegraph system comprises a printer in which one of a plurality of selector bars is actuated in accordance with each received signal.
  • a keyboard transmitter having a series of notched combination bars set longitudinally in varying combinations in accordance with each signal to be transmitted,
  • cam means clutched to a rotating shaft for one revolutlon on actuation of a particular 45 one of the selector bars in said printer to 0perate a rock shaft in a series of steps corresponding to successive signals to be trans-.
  • a telegraph transmitter aseries of notched combination bars are set longitudinally in varying combinations in accordance with each one of a pluralty of keys in a keyboard, so as to control signalling contact means, and cam means under independent control are adapted to control the signalling contact means also through said seriesof combination bars to send groups of signals independent of said keyboard.
  • local means is associated .therewith to transmit an indication individis allottedv therein to'transmit a signal a apted to obtain anindication individual to any other station towhich it is connected, and means 70 i is actuated by said key to prevent the actuation of said local means during the continued depression of'said key.
  • a transmitter means operable during the transmission of an indication individual to-thattransmitter to prevent the depression of any key of the keyboard.
  • Fig.1 shows diagrammaticallyf'as much of a telegraph transmitter as is considered necessary forthe comprehension of the invention together with the means associated therewith-for transmitting to line an indication individual to that trans-
  • Fig. 2 shows one method whereby the'keys of the transmitter may be locked against operation durin .the period the'means associated therewit are transmitting an indic'a tion individual to that transmitteror station to line.
  • v p Y Fig.3 showsone method whereby the operation of the means shown in Fig. 1 is prevented when the key 'of the keyboard. at'that station is depressed for the purpose of obm taining an indication individual to the other station to which it is connected.
  • Fig. 4 is an exploded view of a modified form of signalling drum and Fig. 5 shows the drum assembled.
  • any convenient type of keyboard transmitter may be employed in.
  • notched combination bars of which only the extremities 1 5 are here shown, is set longitudinally in combinations varying in accordance with the key depressed.
  • These notched combination bars may be moved positively on the depression of a key by notches inclined in one direction or the other according to the longitudinal direction in which it is desired that the bar should be moved.
  • certain of the bars may be held against longitudinal movement Whilst the remainder are actuated either by mechanical power or by spring tension under the control of cams released on actuation of the usual universal bar.
  • a cam sleeve 6 is adapted to co-operate in-the appropriate manner as will hereinafter be evident.
  • combination bars 1 5 are longitudinally movable in varying combinations under the control either of the usual key levers, only one of which, 7 is here shown and to which special functions are allotted as will be clear from that which follows, or under the control of the cam sleeve '6.
  • sleeve 6 On the surface of sleeve 6 is a series of cam projections 37 which co-operate in sequence on rotation of the sleeve with the extremities of the combination bars 1 5. . These projections may be arranged, so that upon rotation of sleeve 6 the projections or groups thereof in an axial direction control the longitudinal position of the series of combination bars 1 5 to form combinations corresponding to desired characters.
  • the groups of projections at different circumferential positlons of the sleeve 6 may be so arranged that different combinations corresponding to difierent characters can be sequentially set up on the combination bars 1 5.
  • keyboard transmitters of the class herein referred to means is provided to cause the actuation of the distributor or equivalent device on the depression of any key to send 1n correct sequence the combination of signal impulses as determined by the setting of the combination barsl 5.
  • Such means usually consists of a universal bar which is actuated on depression of any key to release a clutch for one revolution. In Fig. 1 this means is represented by bar 8. If now bar 8 is actuated at intervals and the sleeve 6 is correspondingly stepped round so as to bring consecutive groups of thecam projections 37 into operative relation with bars 1 5 it will be seen that the transmitter will automatically transmit signals corresponding to a group of characters and these characters may be arranged to constitute the indication individual to that transmitter or station.
  • This indication serves as the identity of that station and as in telephone practice may conveniently be a letter or letters indicating an exchange, followed by a number indicating the number of that transmitter or station. It will readily be seen that any desired number of characters may be arranged for by making sleeve 6 of sufiicient diameter to contain the requisite number of groups of projections round the circumference.
  • Fig. 1 In order to actuate the universal bar 8 and rotate sleeve 6 step by step for the transmission of successive characters, the means shown in Fig. 1 may conveniently be employed.
  • This consists of a rock shaft 9 to which are fixed lever arms 10, 11, 12 and cam 13.
  • a gear wheel 14 driven at a suitable speed and preferably by the same source of mechanical power as is utilized to drive the distributor device of the transmitter rotates a shaft 15 and a detent 16 engages the escapement of a clutch 17.
  • clutch 17 Upon release of the escapement, clutch 17 operates in a manner already well known so as to rotate sleeve 18 and cam 13 for one revolution only.
  • Cam 13 is arranged with a series of projections corresponding in number to the number of groups of signals on the sleeve 6.
  • Lever arm 10 carries a roller or suitable bearing surface at the extremity which bears on the cam 13.
  • the detent 16 is preferably under the control of a selector bar in a printer associated with the transmitter at that station.
  • a selector bar 21 and combination discs 22. 26 of such printer are shown in Fig. 1.
  • a special signal is sent by the depression of a key allotted for that purpose in the keyboard and which may be called who are you or number enquiry key which selects selector bar 21 in the printer at the distant station by means of the setting of combination discs 22 26 in the same way as any other particular character is selected.
  • this particular bar 21 may be arranged to release detent 16 of the automatic return signalling means associated with the key; board transmitter. This release may through the medium of mechanical links, through a flexible cable as shown in Fig. 1 or otherwise I or example by electromagnetic means controlled by a contact closed by bar 21.
  • Cam 27 has a raised portion, as shown, which is arranged to rest under the extremity of lever 28 when the escapement of clutch 17 is in engagement with detent 16, in its normal position of rest.
  • the lever 28 rests on the lower portion of the cam surface, the locking bar 30 of the keyboard is thus actuated by spring tension under the ends of the key bars of the transmitter. This prevents any key from being depressed during this period.
  • the special key on the keyboard for obtaining the identity of the distant station is also conveniently locked out during this period and thus prevents the possibility of mutilation of the signals due to mutual interference.
  • Figures 4 and 5 show a modified method of forming the signalling drum which has the advantage that the designation or number set up and required to be transmitted can be readily changed.
  • a barrel 37 mounted on the driving shaft 38 is formed with a reduced end on which is feathered a detachable drum 39 cut with slots 40 adapted to receive small plates 41 having projections corresponding to the required combinations of the signal code. These plates 41 are inserted in the stop 40 where they are held by a nut 42 which is threaded on the shaft 38 or upon a reduced portion of the barrel 37. The plates 41 are prevented from moving or vibrating by virtue of the shape of their ends which are dovetailed to engage with suitably inclined abutting faces of the nut 42 and barrel 37.
  • a selector bar in said printer actuated on receipt of a particular signal over said line, and mechanical means associated with said keyboard transmitter operable on the actuation of the said selector bar in said printer to transmit a signal or group of signals characteristic of said transmitter.
  • a keyboard transmitter having a series of notched combination printing telegraph system, a keybars adapted to be set in varying combinations in accordance with each one of a plurality of keys in a keyboard, means for controlling signalling contacts in accordance with the setting of said combination bars and mechanical means under independent control adapted to control said signalling contact means through the medium of said series of combination bars to send a signal or group of signals independent of said keyboard.
  • a keyboard transmitter-and a receiving printer at a station associated with a line circuit a series of notched combination bars adapted to be set in varying combinations in accordance with each one of the keys of a keyboard, cam means in said transmitter for actuating said combination bars independently of said keyboard, a selector bar in said printer ada ted to be actuated on receipt of a particu ar signal over said line and means responsive to the actuation of said selector bar in said printer for initiating the operation of said cam means.
  • a printer In a printing telegraph system, a printer, a plurality of selector bars in said printer one of which is actuated in accordance with each received signal, a keyboard transmitter having a series of notched combination bars set longitudinally in Varying combinations in accordance with each signal to be transmitted, cam means in said transmitter adapted to be clutched to a rotating shaft for one revolution responsive to the actuation of a particular selector bar in said printer, a rock shaft adapted to be reciprocated by said cam means and other cam means ada ted to be advanced step-by-step by said roc shaft to control the position of the combination bars for successive signals as timed by said stepping operation.
  • a keyboard transmitter for a telegraph system a series of notched combination bars set longitudinally in varying combinations in accordance with each one of a plurality of keys in a keyboard and controlling thereby signalling contact means, mechanical means under independent control also adapted to control the signalling contact means through said combination bars to send signals independent of said keyboard and means for locking said keys against operation during the actuation of said mechanical means under independent control.
  • a keyboard transmitter at said first station having a key the depression of which causes the transmission of a su ervisory signal responsive to which sai second station is adapted to transmit one or more signals indicative of its identity
  • local means associated with the transmitter at said first station adapted to transmit one or more signals indicative of its own identity in response to a received supervisory signal and means actuated by said key for preventing the actuation of said local means during the depression of said ke 7.
  • a printer In a printing telegraph system, a printer, a plurality of selector bars in said printer one of which is actuated in accordance with each received signal, a keyboard transmitter having a series of combination bars set in varying combinations in accordance with each signal to be transmitted, cam means in said transmitter adapted to be clutched to a rotating shaft for one revoluion responsive to the actuation of a particular selector bar in said printer, a kc board for said transmitter, a key in said key oard for causing the transmission of a supervisory signal and means actuated by said key for preventing the clutching of said cam means to said rotating shaft during the operation and continued depression of said key.
  • a printer selective means in said printer actuated in accordance with received signals, a keyboard transmitter, selective means in said transmitter actuated in accordance with the operation of a keyboard, mechanical means in said transmitter for transmitting a signal or group of signals individual to said transmitter in response to a particular setting of the selective means in said printer, means associated with said transmitter for causing the transmission of a special supervisory signal, and means for preventing the operation of the said mechanical means during the transmission of said special supervisory signal.
  • a keyboard transmitter selective means in said transmitter actuated in accordance with the operation of the keys of a keyboard to control the actuation of signalling contact means, mechanical means under independent control adapted to control said contact means to send signals independent of said keyboard, and locking means rendered effective by the initial actuation of said mechanical means to prevent the actuation of said keyboard during the operation of said mechanical means.
  • a keyboard transmitter having a series of notched combination bars adapted to be set in varying combinations in accordance with each one of a plurality of keys in a keyboard
  • means for controlling signalling contacts in accordance with the setting of said combination bars cam means under independent control adapted to control said signalling contact means through the medium of said series of combination bars to send signals independent of said keyboard and a locking bar to lock said keys controlled by said cam means.
  • cam-means comprises a rotatable drum provided with projections which cooperate with said combination bars to initiate the transmission of said signals.
  • cam means comprises a rotatable drum or cylinder provided with integral projections which cooperate with the ends of said combination bars.
  • cam means comprises a slotted drum in which is detachably mounted, plate members the edges of which are formed with teeth or projections adapted to cooperate with the ends of said selector bars.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Input From Keyboards Or The Like (AREA)
  • Devices For Checking Fares Or Tickets At Control Points (AREA)
  • Time Recorders, Dirve Recorders, Access Control (AREA)
  • Printing Methods (AREA)
  • Lock And Its Accessories (AREA)
US519038A 1930-03-19 1931-02-28 Telegraph system and apparatus Expired - Lifetime US1879524A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8821/30A GB351018A (en) 1930-03-19 1930-03-19 Improvements in or relating to telegraph systems

Publications (1)

Publication Number Publication Date
US1879524A true US1879524A (en) 1932-09-27

Family

ID=9859857

Family Applications (1)

Application Number Title Priority Date Filing Date
US519038A Expired - Lifetime US1879524A (en) 1930-03-19 1931-02-28 Telegraph system and apparatus

Country Status (5)

Country Link
US (1) US1879524A (enrdf_load_stackoverflow)
BE (1) BE377618A (enrdf_load_stackoverflow)
DE (1) DE753439C (enrdf_load_stackoverflow)
FR (1) FR711721A (enrdf_load_stackoverflow)
GB (1) GB351018A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2752414A (en) * 1952-09-16 1956-06-26 Teletype Corp Answer back device for printing telegraph systems

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE974367C (de) * 1953-08-21 1960-12-08 Hell Rudolf Dr Ing Fa Namengeber fuer Bildtelegraphie

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2752414A (en) * 1952-09-16 1956-06-26 Teletype Corp Answer back device for printing telegraph systems

Also Published As

Publication number Publication date
GB351018A (en) 1931-06-19
DE753439C (de) 1952-10-27
BE377618A (enrdf_load_stackoverflow)
FR711721A (fr) 1931-09-16

Similar Documents

Publication Publication Date Title
US2225657A (en) Telegraph message classification system
US1921407A (en) Telegraph transmitting apparatus
US1864074A (en) Telegraph signaling system
USRE20330E (en) Keyboard mechanism for telegraph
US1879524A (en) Telegraph system and apparatus
US2773931A (en) Printing telegraph apparatus
US1932932A (en) Start-stop telegraph system and apparatus therefor
US1941916A (en) Combined keyboard transmitter and perforated tape transmitter
US2358477A (en) Apparatus for selectively positioning typewheels
US2752414A (en) Answer back device for printing telegraph systems
US1936656A (en) Printing telegraph system
US2110506A (en) Start-stop telegraph
US2003325A (en) Telegraph system
GB504501A (en) Printing telegraph automatic exchange system
US2015323A (en) Printing telegraph system
US2672508A (en) Teletypewriter line feed transmitting and counting apparatus
US1909838A (en) Telegraph exchange system
US2554903A (en) Vertical tabulation mechanism for telegraph printers
US1870392A (en) Telegraph printer
US2613265A (en) Message numbering device
US1564421A (en) Printing telegraph
US2272420A (en) Telegraph keyboard apparatus
US1275559A (en) Auxiliary signal arrangement for printing-telegraph systems.
US1895108A (en) Telegraph keyboard controlled apparatus
US1576167A (en) Storing transmitter