GB616078A - Improvements in or relating to telephone keys - Google Patents

Improvements in or relating to telephone keys

Info

Publication number
GB616078A
GB616078A GB25475/46A GB2547546A GB616078A GB 616078 A GB616078 A GB 616078A GB 25475/46 A GB25475/46 A GB 25475/46A GB 2547546 A GB2547546 A GB 2547546A GB 616078 A GB616078 A GB 616078A
Authority
GB
United Kingdom
Prior art keywords
supporting plate
aug
plate
springs
plates
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
GB25475/46A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB616078A publication Critical patent/GB616078A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/24—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting
    • H01H1/26—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting with spring blade support
    • H01H1/28—Assembly of three or more contact-supporting spring blades

Landscapes

  • Push-Button Switches (AREA)

Abstract

616,078. Mechanical switches held set and freed mechanically. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. Aug. 26, 1946, No. 25475. Convention date, Aug. 28, 1945. [Class 38 (v)] A telephone key has a one-piece moulded plastic frame comprising three mutuallyperpendicular plates, namely a base-plate 1 for attachment to the keyboard, and projecting therefrom a supporting plate 3 carrying a mounting plate 2 for the contact-spring sets. The end of the supporting plate 3 has a dovetail profile 17 fitting into corresponding slots in the insulating plates 10 separating the contact springs. The moving contact springs are connected at their free ends by insulating ladders 21, 22, and the stationary springs are held with initial set by side projections engaging in slots 25 in strips 23, 24 glued in channels in the supporting plate 3. The central offposition is located by a spring-loaded ball in a bore 26 engaging a slit 28 in the cylindrical surface of the key.
GB25475/46A 1945-08-28 1946-08-26 Improvements in or relating to telephone keys Expired GB616078A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL616078X 1945-08-28

Publications (1)

Publication Number Publication Date
GB616078A true GB616078A (en) 1949-01-17

Family

ID=19788266

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25475/46A Expired GB616078A (en) 1945-08-28 1946-08-26 Improvements in or relating to telephone keys

Country Status (2)

Country Link
FR (1) FR932807A (en)
GB (1) GB616078A (en)

Also Published As

Publication number Publication date
FR932807A (en) 1948-04-02

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