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
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.
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0090542A2 (en) * | 1982-03-25 | 1983-10-05 | LRE RELAYS & ELECTRONICS LIMITED | Improvements relating to keyboards |
-
1918
- 1918-09-21 GB GB1537518A patent/GB128809A/en not_active Expired
Cited By (2)
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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