US4351995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vibration-preventing mechanism for use in a push button switch
Assignee: Alps Alpine Co Ltd
•
Filing: 1980-09-05
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Granted: 1982-09-28
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Expires: 2000-09-05
Abstract
Abstract A vibration-preventing mechanism for a lock type push button switch eliminates vibration, chattering and vibration noise of a resilient spring contact by forming a projection on each push button.
Inventors
- 👤 Akihiko Inoue
- 👤 Takeo Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:26
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/70; H01H13/72; H01H13/74; H01H1/00; H01H1/50
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
91 words
In a push button switch including a plurality of push buttons having means for deflecting resilient contacts and having a spring member engaging said push buttons to urge them in a direction opposite that for deflecting the resilient contacts, the improvement including means for preventing the resilient contacts from vibrating upon release of the deflecting force from the associated push button, said means including a respective projection formed on the lower portion of said push buttons and extending towards a respective contact and dimensioned to prevent the associated contact from vibrating.
Claim 2
Dependent Claim
91 words
In a push button switch including a plurality of push buttons having means for deflecting resilient contacts and having a spring member engaging said push buttons to urge them in a direction opposite that for deflecting the resilient contacts, the improvement including means for preventing the resilient contacts from vibrating upon release of the deflecting force from the associated push button, said means including a respective projection formed on the lower portion of said push buttons and extending towards a respective contact and dimensioned to prevent the associated contact from vibrating.
Claim 3
Dependent Claim
62 words
The vibration-preventing mechanism according to claim 1 said contacts being formed in an inverted V shape and said projection extending from the respective push button in such a manner that a line connecting the point of engagement of the push button with the respective contact to the tip of said projection is substantially equal to the inclination of said inverted V-shaped contact.
Claim 4
Dependent Claim
27 words
The vibration-preventing mechanism according to claim 2, wherein the shape of the tip of said projection is substantially equal to the inclination of said inverted V-shaped contact.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-09-27 | 1986-03-29 | 1986-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-27 | 1990-03-29 | 1990-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-27 | 1994-03-29 | 1994-09-28 | $7700.00 | Window Closed / Lapsed |