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GB517202A - Improvements in push-button switches - Google Patents

Improvements in push-button switches

Info

Publication number
GB517202A
GB517202A GB2184438A GB2184438A GB517202A GB 517202 A GB517202 A GB 517202A GB 2184438 A GB2184438 A GB 2184438A GB 2184438 A GB2184438 A GB 2184438A GB 517202 A GB517202 A GB 517202A
Authority
GB
United Kingdom
Prior art keywords
keys
bar
shank
bears
key
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
GB2184438A
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.)
Plessey Co Ltd
Original Assignee
Plessey 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 Plessey Co Ltd filed Critical Plessey Co Ltd
Priority to GB2184438A priority Critical patent/GB517202A/en
Publication of GB517202A publication Critical patent/GB517202A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H03J5/24—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection
    • H03J5/26—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection or for television channel selection operated by hand
    • H03J5/32—Stationary tuning circuits or elements selected by push-button

Landscapes

  • Push-Button Switches (AREA)

Abstract

517,202. Keyboard switches. PLESSEY CO., Ltd., and GILLARD, F. G. July 22, 1938, Nos. 21844, 27075 and 30596. [Class 38 (v)] A bank of switch keys in a frame are each latched on depression by a common latching bar, any previously locked being released. Each keyshank 16 is a flat bar and bears a tooth 17 projecting from a flat side co-operating with the latch bar 21. The projection preferably comprises a punched-out part of the bar. A second projection 18 may be provided to release any keys that may be pressed down simultaneously. The switch frame comprises two metal plates 10. 11 braced by cross members 12, 13. Fixed contacts 30 are mounted on separate side panels 26, for each key. Each key-shank bears an insulating carrier 31 for moving contacts, the carriers being guided in slots on the side panels and attached to the shank solely by holes fitting over studs 34 riveted &c. to the shank. The moving-contact carriers may extend lengthwise of the row of keys instead of transversely as shown. The return of the keys, under pressure of the springs 20, may be buffered by a layer of soft material against which the top edge of the contact carriers may strike. Specification 501,273, [Group XXXVI], is referred to.
GB2184438A 1938-07-22 1938-07-22 Improvements in push-button switches Expired GB517202A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2184438A GB517202A (en) 1938-07-22 1938-07-22 Improvements in push-button switches

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2184438A GB517202A (en) 1938-07-22 1938-07-22 Improvements in push-button switches

Publications (1)

Publication Number Publication Date
GB517202A true GB517202A (en) 1940-01-23

Family

ID=10169755

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2184438A Expired GB517202A (en) 1938-07-22 1938-07-22 Improvements in push-button switches

Country Status (1)

Country Link
GB (1) GB517202A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2691702A (en) * 1949-03-17 1954-10-12 Grigsby Allison Company Inc Push-button electric switch
DE1018487B (en) * 1953-01-16 1957-10-31 Siemens Ag Switching device operated by pushbuttons, especially for radio receivers
DE973427C (en) * 1951-07-31 1960-02-18 Siemens Elektrogeraete Gmbh Switching device with several push buttons

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2691702A (en) * 1949-03-17 1954-10-12 Grigsby Allison Company Inc Push-button electric switch
DE973427C (en) * 1951-07-31 1960-02-18 Siemens Elektrogeraete Gmbh Switching device with several push buttons
DE1018487B (en) * 1953-01-16 1957-10-31 Siemens Ag Switching device operated by pushbuttons, especially for radio receivers

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