GB433788A - Improvements in or relating to electric signalling systems - Google Patents

Improvements in or relating to electric signalling systems

Info

Publication number
GB433788A
GB433788A GB546834A GB546834A GB433788A GB 433788 A GB433788 A GB 433788A GB 546834 A GB546834 A GB 546834A GB 546834 A GB546834 A GB 546834A GB 433788 A GB433788 A GB 433788A
Authority
GB
United Kingdom
Prior art keywords
key
operated
cams
circuit
motor
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
Application number
GB546834A
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.)
ERIC LOVERSEED THOMPSON
Original Assignee
ERIC LOVERSEED THOMPSON
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 ERIC LOVERSEED THOMPSON filed Critical ERIC LOVERSEED THOMPSON
Priority to GB546834A priority Critical patent/GB433788A/en
Publication of GB433788A publication Critical patent/GB433788A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B47/00—Time-pieces combined with other articles which do not interfere with the running or the time-keeping of the time-piece

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Input From Keyboards Or The Like (AREA)

Abstract

433,788. Keyboard switches. CLAYTON, G. C. H., and THOMPSON, E. L., 1, Creed Lane, Doctors Commons, London. Feb. 19, 1934, No. 5468. [Class 38 (v)] [See also Group XXXVIII] The transmitter of an electric signalling system comprises rows of keys 5, 5<1>, 5<2> carrying loosely mounted cam followers 23 which co-operate with cams 12 mounted on geared shafts 11, 11<1>, 11<2>, driven by an electric motor. Each follower when depressed by its key is brought into the range of operation of the lever 10 of a pivoted mercury switch connected in the circuit of a signalling device. The cams of each shaft are set at different angles so that upon depression of a key in each row the corresponding signalling devices are operated repeatedly in a predetermined sequence. Each operated key is maintained in a depressed position by a spring latch which may be released by a release key. The driving motor circuit is closed manually but maintained automatically until a complete signal is terminated. Moreover when the motor circuit is opened a brake is operated to prevent further rotation of the motor shaft. Specification 427,040, [Group XXXVIII], is referred to.
GB546834A 1934-02-19 1934-02-19 Improvements in or relating to electric signalling systems Expired GB433788A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB546834A GB433788A (en) 1934-02-19 1934-02-19 Improvements in or relating to electric signalling systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB546834A GB433788A (en) 1934-02-19 1934-02-19 Improvements in or relating to electric signalling systems

Publications (1)

Publication Number Publication Date
GB433788A true GB433788A (en) 1935-08-19

Family

ID=9796742

Family Applications (1)

Application Number Title Priority Date Filing Date
GB546834A Expired GB433788A (en) 1934-02-19 1934-02-19 Improvements in or relating to electric signalling systems

Country Status (1)

Country Link
GB (1) GB433788A (en)

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