GB592519A - Telephone switching key - Google Patents
Telephone switching keyInfo
- Publication number
- GB592519A GB592519A GB8640/45A GB864045A GB592519A GB 592519 A GB592519 A GB 592519A GB 8640/45 A GB8640/45 A GB 8640/45A GB 864045 A GB864045 A GB 864045A GB 592519 A GB592519 A GB 592519A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pin
- holes
- cam
- stroke
- 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
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
Landscapes
- Telephone Set Structure (AREA)
- Push-Button Switches (AREA)
Abstract
592,519. Switches with quick action. STANDARD TELEPHONES & CABLES, Ltd. April 7, 1945, No. 8640. Convention date, May 6, 1944. [Class 38(v)] A telephone switching key comprises two frame parts 10, 11 having a plurality of pairs of holes oppositely disposed in each, and a block 14 mounting the contact stacks 16, 17, all held together by a single screw 12. The cam body 24 is mounted on a pin 30 in one pair of holes, and carries on a pin 23 a roller 22 which engages the contact actuating springs 20, 21, and is retained on the pin 23 by a dependent lip 26 on the frame part 10. Projections 52 on the frame engage projections 51 on the cam body, limiting its stroke in either direction to the "locking position " wherein the actuating springs 20, 21, exert no return force on the cam. The stroke may be further restricted on either or both sides, to the " non-locking " position by inserting pins 54 in the upper pair of holes 29, or a two - position key may be obtained by inserting the pin in one of the lower holes 29, which blocks the motion of the cam on that side. A double-sided key may be similarly constructed Figs. 6, 7, 8, (not shown).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US534420A US2410062A (en) | 1944-05-06 | 1944-05-06 | Telephone key |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB592519A true GB592519A (en) | 1947-09-19 |
Family
ID=24129945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8640/45A Expired GB592519A (en) | 1944-05-06 | 1945-04-07 | Telephone switching key |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2410062A (en) |
| BE (1) | BE475396A (en) |
| FR (1) | FR928660A (en) |
| GB (1) | GB592519A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2541336A (en) * | 1948-08-23 | 1951-02-13 | Automatic Elect Lab | Secretary's answering key cabinet |
| US2560324A (en) * | 1948-10-09 | 1951-07-10 | Standard Telephones Cables Ltd | Switching key with roller actuating means |
| BE534383A (en) * | 1953-12-24 |
-
0
- BE BE475396D patent/BE475396A/xx unknown
-
1944
- 1944-05-06 US US534420A patent/US2410062A/en not_active Expired - Lifetime
-
1945
- 1945-04-07 GB GB8640/45A patent/GB592519A/en not_active Expired
- 1945-12-27 FR FR928660D patent/FR928660A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR928660A (en) | 1947-12-04 |
| BE475396A (en) | |
| US2410062A (en) | 1946-10-29 |
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