US3855488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Push button pulse signal generator
Assignee: SIMONDS INDUSTRIES Inc A DE CORP
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Filing: 1973-09-17
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Granted: 1974-12-17
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Expires: 1993-09-17
Abstract
Abstract A push button signal generator includes a coil mounted in a cylindrical housing with a plunger positioned in the center of the coil. The plunger is held in a fixed position by a permanent magnet within the housing. A push button may be depressed to drive the plunger through the coil thereby generating a pulse signal in the coil when the coil is placed in a circuit. Alternatively, the plunger may be positioned against a piezoelectric crystal. Flexing of the crystal will provide an electric output signal.
Inventors
- 👤 L Britton
- 👤 F Vojir
- 👤 W Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:31
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/94; H03K17/96; H03K17/964; H03K17/9643
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
182 words
A push button signal generator comprising, in combination: a housing having a longitudinal axis and having mounted therein the following: a. a piezoelectric plate mounted in one end of said housing, said plate having signal leads; b. A movable plunger of magnetic material including an extension at one end engageable with said plate, said plunger also including an intermediate flange portion and a projection at the other end; c. A fixed magnet adjacent said flange portion for magnetically attracting said plunger in a first direction to a first position not engaging said plate; d. a keeper plate for engaging said projection to limit the travel of said plunger in said first direction and prevent said flange from engaging said magnet; and e. push button means including an extension for engaging said plunger and driving said plunger in a direction opposite the first direction against the force of said magnet and into engagement with said plate to thereby generate an electrical signal across said leads, said magnet acting to return said plunger to said first position upon release of said push button means.
Claim 2
Dependent Claim
182 words
A push button signal generator comprising, in combination: a housing having a longitudinal axis and having mounted therein the following: a. a piezoelectric plate mounted in one end of said housing, said plate having signal leads; b. A movable plunger of magnetic material including an extension at one end engageable with said plate, said plunger also including an intermediate flange portion and a projection at the other end; c. A fixed magnet adjacent said flange portion for magnetically attracting said plunger in a first direction to a first position not engaging said plate; d. a keeper plate for engaging said projection to limit the travel of said plunger in said first direction and prevent said flange from engaging said magnet; and e. push button means including an extension for engaging said plunger and driving said plunger in a direction opposite the first direction against the force of said magnet and into engagement with said plate to thereby generate an electrical signal across said leads, said magnet acting to return said plunger to said first position upon release of said push button means.
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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) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |