GB128809A - Improvements in or relating to Telephone Switching Apparatus. - Google Patents

Improvements in or relating to Telephone Switching Apparatus.

Info

Publication number
GB128809A
GB128809A GB1537518A GB1537518A GB128809A GB 128809 A GB128809 A GB 128809A GB 1537518 A GB1537518 A GB 1537518A GB 1537518 A GB1537518 A GB 1537518A GB 128809 A GB128809 A GB 128809A
Authority
GB
United Kingdom
Prior art keywords
switches
ringing
telephone
side plates
balls
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
GB1537518A
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.)
ROBERT RICHARDSON WADE
Automatic Telephone Manufacturing Co Ltd
Original Assignee
ROBERT RICHARDSON WADE
Automatic Telephone Manufacturing 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 ROBERT RICHARDSON WADE, Automatic Telephone Manufacturing Co Ltd filed Critical ROBERT RICHARDSON WADE
Priority to GB1537518A priority Critical patent/GB128809A/en
Publication of GB128809A publication Critical patent/GB128809A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
    • H01H21/02—Details
    • H01H21/18—Movable parts; Contacts mounted thereon
    • H01H21/36—Driving mechanisms
    • H01H21/50—Driving mechanisms with indexing or latching means, e.g. indexing by ball and spring; with means to ensure stopping at intermediate operative positions

Landscapes

  • Telephone Set Structure (AREA)

Abstract

128,809. Automatic Telephone Manufacturing Co., Savin, J., an.l Wade,. R. R. Sept. 21, 1918. Retractive switches; switches, quick-break; switches, locking and unlocking.-Ringing and listening keys for telephone circuits have the key lever 1 provided with a helical spring 13, adapted to force a ball or balls 14 into holes or depressions 15 in a side plate or plates 6, upon the key lever attaining its mid or normal positions, for the purpose of obviating the click otherwise produced in. a subscriber's telephone receiver by the key striking the ringing springs when resetting it from the listening position. If the side plates 6 are of soft metal, readily-renewable semi-circular steel members, held in position thereon by such means as integral pins engaging holes in the side plates, may serve as races upon which the balls move.
GB1537518A 1918-09-21 1918-09-21 Improvements in or relating to Telephone Switching Apparatus. Expired GB128809A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1537518A GB128809A (en) 1918-09-21 1918-09-21 Improvements in or relating to Telephone Switching Apparatus.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1537518A GB128809A (en) 1918-09-21 1918-09-21 Improvements in or relating to Telephone Switching Apparatus.

Publications (1)

Publication Number Publication Date
GB128809A true GB128809A (en) 1919-07-03

Family

ID=32346754

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1537518A Expired GB128809A (en) 1918-09-21 1918-09-21 Improvements in or relating to Telephone Switching Apparatus.

Country Status (1)

Country Link
GB (1) GB128809A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0090542A2 (en) * 1982-03-25 1983-10-05 LRE RELAYS & ELECTRONICS LIMITED Improvements relating to keyboards

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0090542A2 (en) * 1982-03-25 1983-10-05 LRE RELAYS & ELECTRONICS LIMITED Improvements relating to keyboards
EP0090542A3 (en) * 1982-03-25 1985-11-06 Lre Relays & Electronics Limited Improvements relating to keyboards

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