US2167528A - Telegraph transmitter - Google Patents

Telegraph transmitter Download PDF

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Publication number
US2167528A
US2167528A US69772A US6977236A US2167528A US 2167528 A US2167528 A US 2167528A US 69772 A US69772 A US 69772A US 6977236 A US6977236 A US 6977236A US 2167528 A US2167528 A US 2167528A
Authority
US
United States
Prior art keywords
cam
lever
contact tongue
transmitting
transmitter
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
US69772A
Other languages
English (en)
Inventor
Salmon Reginald Dennis
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 US2167528A publication Critical patent/US2167528A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L17/00—Apparatus or local circuits for transmitting or receiving codes wherein each character is represented by the same number of equal-length code elements, e.g. Baudot code
    • H04L17/02—Apparatus or circuits at the transmitting end
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L17/00—Apparatus or local circuits for transmitting or receiving codes wherein each character is represented by the same number of equal-length code elements, e.g. Baudot code
    • H04L17/02—Apparatus or circuits at the transmitting end
    • H04L17/04—Apparatus or circuits at the transmitting end with keyboard co-operating with code-bars
    • H04L17/06—Contact operating means

Definitions

  • This invention relates to telegraph transmitters of the kind in which signal controlling means such as a key determine the successive operation of a single transmitting contact tongue in accordance with the elements of a signal.
  • I provide a telegraph transmitter of the kind referred to in which every transit of the transmitting contact tongue is determined by positive cam action.
  • I provide a telegraph transmitter of the kind referred to in which a selector lever moved by means of a key or the like according to the character of a signal element to be transmitted is effective to determine the position of the transmitting contact tongue during a brief portion only of each signal element period.
  • a telegraph transmitter of the kind referred to comprising a selector lever adapted to be moved according to the character of a signal element to be transmitted, a cam for determining the duration of the signal element, and an intermediate lever adapted to be struck by the cam to cause the selector lever to position the transmitting contact tongue according to the position of the selector lever.
  • FIG. 1 shows diagrammatically the principle of the invention
  • Fig. 3 is a View in vertical cross section of the transmitter of Fig. 2, showing one of the selector levers and associated mechanism, and
  • a keyboard transmitter for sending signals on a start stop system comprising six combination bars CB (one only of which is shown), one moved invariably by the depression of any key and the other live moved in combinations according to the key depressed.
  • the transmitting cam spindle I carries seven cams 6 co-operating with seven intermediate levers 5 which also co-operate with seven selecting arms 4.
  • Each arm 4 is carried at one end of a two-armed lever 8 engaging at its other end combination bar 9 which is under the control of the keybars which are not shown.
  • the selecting arms 4 are arranged to co-operate with two rocking frames 3 carrying two lever arms 2 which carry at their topmost ends a link I which engages with the transmitting contact lever ZI.
  • the transmitting spindle l is normally driven by a friction clutch, and is held stationary by means of a detent I2 engaging with a stop arm II).
  • the other arm II of the stop arm I0 is under the control of a resetting cam I3, and also co-operates with a stop M.
  • the stop I6 is engaged by a latch I5 carried by a bellcrank lever I6 which also engages with the trip bar H, which is also under the control of the keybars not shown.
  • the trip bar I! Upon the depression of any key the trip bar I! is moved to the left and the combination bars 9 are set in accordance with the keybar which has been depressed.
  • the movement of the trip bar I? rotates the bellcrank I6, thereby pulling the latch I5 downwards, thereby rotating the stop I4 against the action of its spring 23 in a clockwise direction.
  • the movement of the stop I4 releases the stop arm I0, thereby permitting it to be withdrawn from engagement with the detent I2 under the action of its spring 22, thereby releasing the transmitting spindle 'I, and permitting it to rotate under the action of its driving clutch.
  • stop arm that engages the detent holding the transmitting cam spindle stationary is not directly linked to the universal bar but is held by means of a pivoted stop, withdrawn by the movement of the universal bar.
  • the setting of the combination bars 9 through the medium of the two arm levers 8 moves the arms 4 in a righthand or lefthand position.
  • the intermediate levers 5 are lifted seriatim, thereby striking the arms 4 against one or other of the rocking frames 3, and consequently moving the link I in one direction or the other.
  • the movement of the link I moves the transmitting contact arm 2
  • a telegraph transmitter of the kind referred to comprising, a transmitting contact tongue, a selector lever operatively associated with said transmitting contact tongue, means for moving said selector lever in accordance with the character of a signal element to be transmitted, a cam for determining the duration of the signal element, an intermediate lever mounted between said cam and said selector lever, to cause said selector lever to position said transmitting contact tongue according to the position of the selector lever, and means for holding said transmitting contact tongue in the position into which it was last moved.
  • a telegraph transmitter as claimed in claim 3 in which the intermediate lever, is formed with a nose adapted to be struck by a cam.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmission Devices (AREA)
  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Push-Button Switches (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
US69772A 1935-04-05 1936-03-20 Telegraph transmitter Expired - Lifetime US2167528A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB10580/35A GB454593A (en) 1935-04-05 1935-04-05 Improvements in or relating to telegraph transmitters

Publications (1)

Publication Number Publication Date
US2167528A true US2167528A (en) 1939-07-25

Family

ID=32071264

Family Applications (1)

Application Number Title Priority Date Filing Date
US69772A Expired - Lifetime US2167528A (en) 1935-04-05 1936-03-20 Telegraph transmitter

Country Status (5)

Country Link
US (1) US2167528A (de)
CH (1) CH233477A (de)
DE (1) DE891553C (de)
FR (2) FR804750A (de)
GB (2) GB454593A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2691062A (en) * 1951-10-23 1954-10-05 Teletype Corp Telegraph transmitter
US2754364A (en) * 1951-06-14 1956-07-10 Kleinschmidt Lab Inc Keyboard transmitter

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE941916C (de) * 1951-12-14 1956-04-19 Autelca Ag Einrichtung zur Abgabe von Stromimpulskombinationen, insbesondere fuer Fernschreiber

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE419919C (de) * 1921-04-30 1925-10-15 Morkrum Company Drucktelegraphenanlage nach Art des Baudotschen Systems
CH164048A (de) * 1931-05-01 1933-09-15 Fuld & Co Telephon & Telegraph Durch eine Hilfskraft betätigter Stromstosssender.
GB388785A (en) * 1931-09-03 1933-03-03 Creed & Co Ltd Improvements in or relating to keyboard controlled apparatus for telegraph systems
US1942588A (en) * 1932-02-06 1934-01-09 Int Communications Lab Inc Telegraph regenerative repeater
US1956704A (en) * 1933-07-11 1934-05-01 American Telephone & Telegraph Regenerative signal repeater

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2754364A (en) * 1951-06-14 1956-07-10 Kleinschmidt Lab Inc Keyboard transmitter
US2691062A (en) * 1951-10-23 1954-10-05 Teletype Corp Telegraph transmitter

Also Published As

Publication number Publication date
GB454593A (en) 1936-10-05
FR50850E (fr) 1941-04-18
GB517701A (en) 1940-02-06
DE891553C (de) 1953-09-28
CH233477A (de) 1944-07-31
FR804750A (fr) 1936-10-31

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