Patent US4915733B1 successfully refreshed from Google Patents.
Patent US3718877A successfully refreshed from Google Patents.
US3718877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switch for push key
Assignee: Hattori Tokeiten KK
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Filing: 1971-09-16
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Granted: 1973-02-27
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Expires: 1991-09-16
Abstract
Abstract A switch for a push key of a calculator or the like comprising, a switch case with built-in members and a cover. Hooks projecting downwardly from the cover engage with edges of an upper flange of the switch case and the extreme ends of said hooks fit into positioning holes bored in a supporting plate on the calculator. This enables the key-top to be mounted at a desired position.
Inventors
- 👤 A Matsushima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:13
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/721; C08G18/727; G; G10; G10H; G10H1/00; G10H1/02; G10H1/04; G10H1/043; H; H01; H01H; H01H13/00; H01H13/50; H01H13/52; H01H36/00; H01H36/0006; H01H36/004; H01H36/0046; H03; H03C; H03C3/00; H03C3/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
103 words
For use in a calculator and the like, in combination, a pushkey, a switch case, switch means in said case having contacts operable to a closed and open position in response to actuation of said push-key, means on said switch key for actuating said switch contacts, a cover on said case having integral thereon snap-on hooks extending in a direction for engaging catch surfaces on said case, a support member having mounting holes, and said hooks having portions extending past said cOver surfaces when said cover is mounted on said case for being received snugly in said mounting holes on said support member.
Claim 2
Dependent Claim
103 words
For use in a calculator and the like, in combination, a pushkey, a switch case, switch means in said case having contacts operable to a closed and open position in response to actuation of said push-key, means on said switch key for actuating said switch contacts, a cover on said case having integral thereon snap-on hooks extending in a direction for engaging catch surfaces on said case, a support member having mounting holes, and said hooks having portions extending past said cOver surfaces when said cover is mounted on said case for being received snugly in said mounting holes on said support member.
Claim 3
Dependent Claim
39 words
The combination according to claim 1, in which said hooks comprise, a portion mounted adjacent the periphery of said cover bendable outwardly from said periphery for clearing said case and snapping back to engage said hooks on said surfaces.
Claim 4
Dependent Claim
27 words
The combination according to claim 1, in which said switch comprises, a reed switch, said means on said push-key for actuating said contacts comprising a permanent magnet.
Claim 5
Dependent Claim
16 words
The combination according to claim 3, in which said integral hooks comprise, a bendable plastic material.
Claim 6
Dependent Claim
120 words
A case for a push-key comprising, a body, a cover having an opening for inserting a key therein into said body, said body having an inner space for housing a push-key actuated switch, said cover having a greater transverse dimension than said body, said cover having integral hooks extending in a direction for engaging surfaces on said case body, said hooks having shanks integral with said cover and having bevelled surfaces for engaging said body and being actuated outwardly away from said body and snapping back to engage said body, said body having flange surfaces for actuating said hooks outwardly when said bevelled surfaces are pressed against said flange surfaces and undersurfaces defining the first-mentioned surfaces engaged by said hooks.
Claim 7
Dependent Claim
120 words
A case for a push-key comprising, a body, a cover having an opening for inserting a key therein into said body, said body having an inner space for housing a push-key actuated switch, said cover having a greater transverse dimension than said body, said cover having integral hooks extending in a direction for engaging surfaces on said case body, said hooks having shanks integral with said cover and having bevelled surfaces for engaging said body and being actuated outwardly away from said body and snapping back to engage said body, said body having flange surfaces for actuating said hooks outwardly when said bevelled surfaces are pressed against said flange surfaces and undersurfaces defining the first-mentioned surfaces engaged by said hooks.
Claim 8
Dependent Claim
34 words
A case for a push-key according to claim 5, in which said bevelled surfaces extend downwardly of said hooks for being received in mounting openings on a support member on which case is mounted.
References Cited (Backward Citations)
US3462719A
Cited
US3609268A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |