GB475292A - Improvements in controlling mechanism for electric signalling or indicating systems - Google Patents

Improvements in controlling mechanism for electric signalling or indicating systems

Info

Publication number
GB475292A
GB475292A GB2138736A GB2138736A GB475292A GB 475292 A GB475292 A GB 475292A GB 2138736 A GB2138736 A GB 2138736A GB 2138736 A GB2138736 A GB 2138736A GB 475292 A GB475292 A GB 475292A
Authority
GB
United Kingdom
Prior art keywords
key
switch
group
depressed
lock
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
GB2138736A
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.)
HARRY ARCHIBALD THOMPSETT
INSTANTA ELECTRIC Ltd
Original Assignee
HARRY ARCHIBALD THOMPSETT
INSTANTA ELECTRIC 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 HARRY ARCHIBALD THOMPSETT, INSTANTA ELECTRIC Ltd filed Critical HARRY ARCHIBALD THOMPSETT
Priority to GB2138736A priority Critical patent/GB475292A/en
Publication of GB475292A publication Critical patent/GB475292A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/27—Devices whereby a plurality of signals may be stored simultaneously
    • H04M1/272—Devices whereby a plurality of signals may be stored simultaneously with provision for storing only one subscriber number at a time, e.g. by keyboard or dial

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Mechanical Control Devices (AREA)

Abstract

475,292. Electric signalling systems. INSTANTA ELECTRIC, Ltd., and THOMPSETT, H. A. Aug. 1, 1936, No. 21387. [Class 40 (i)] In a system for operating indicators as described in Specification 433,788, the operating keys are arranged in groups and group mercury switches are provided so that a signal is operated through contacts of both the common group switch and the individual switch. When a key 2 in any one of the rows is depressed the key is locked down and bridging piece 10 connects the corresponding pair of group contacts 15. Depression of start key 54 tilts lever 57 to move the lock 64 out of the slot in cam 39 and operates switch 62 to start motor 37. Cams 34 tilt group mercury switches 28 in turn so that the indication is given when the relative group switch is effective. The signals set up are repeated until the stop key 53 is depressed to reset bar 48. Lock 64 now rides on the surface of cam 39 until a complete sequence has been sent when the lock drops into the slot 65 and lifts member 40 so that the clutch 46 is disengaged. The switch 62 is also restored to stop motor 37. The depressed keys are released by key 25. Specification 427,040 also is referred to.
GB2138736A 1936-08-01 1936-08-01 Improvements in controlling mechanism for electric signalling or indicating systems Expired GB475292A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2138736A GB475292A (en) 1936-08-01 1936-08-01 Improvements in controlling mechanism for electric signalling or indicating systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2138736A GB475292A (en) 1936-08-01 1936-08-01 Improvements in controlling mechanism for electric signalling or indicating systems

Publications (1)

Publication Number Publication Date
GB475292A true GB475292A (en) 1937-11-17

Family

ID=10162056

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2138736A Expired GB475292A (en) 1936-08-01 1936-08-01 Improvements in controlling mechanism for electric signalling or indicating systems

Country Status (1)

Country Link
GB (1) GB475292A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4443789A (en) * 1974-01-22 1984-04-17 Microwriter Limited Keyboard

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4443789A (en) * 1974-01-22 1984-04-17 Microwriter Limited Keyboard

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