FR726541A - Security device for telephone keys - Google Patents
Security device for telephone keysInfo
- Publication number
- FR726541A FR726541A FR726541DA FR726541A FR 726541 A FR726541 A FR 726541A FR 726541D A FR726541D A FR 726541DA FR 726541 A FR726541 A FR 726541A
- Authority
- FR
- France
- Prior art keywords
- security device
- telephone keys
- keys
- telephone
- security
- 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
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR726541T | 1931-01-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR726541A true FR726541A (en) | 1932-05-30 |
Family
ID=9110758
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR726541D Expired FR726541A (en) | 1931-01-22 | 1931-01-22 | Security device for telephone keys |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR726541A (en) |
-
1931
- 1931-01-22 FR FR726541D patent/FR726541A/en not_active Expired
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