US3751612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Snap action capacitive type switch
Assignee: DECISION DATA Inc A CORP OF
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Filing: 1971-08-30
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Granted: 1973-08-07
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Expires: 1991-08-30
Abstract
Abstract Electrical signaling device in the form of a capacitor or condenser having a fixed plate and a generally dome-shaped snap action plate which may be deformed toward the fixed plate, wherein the dome-shaped plate, when in its normal or relaxed state, is in the form of a hollow geometric solid having an open polyagonal base with a planar side wall extending from each side of the base at equal angles thereto toward each other and are joined by an arcuate surface, the base having arcuate corners bent to extend from the opposite side of the base as the side walls. When the number of sides equals three, it has a base which has the general shape of an equilateral triangle with apexes which are arcuate, the latter being bent angularly to the general plane of the plate, forming abutments which resist the deforming force applied to the dome-shaped plate.
Inventors
- 👤 W Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:52
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/94; H03K17/965; H03K17/975; H03K17/945
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
111 words
A curved snap-action movable sheet metal spring plate for a snap-action switch, said spring plate being in the form of a hollow geometric solid connectable to circuitry responsive to the snap-action switch, said spring plate comprising: an open polyagonal base having a plurality of sides; a plurality of planar side walls, one of said side walls extending from each side of said base at equal angles thereto and toward each other; an arcuate surface interconnecting said side walls; and an arcuate corner interconnecting each pair of adjacent sides of said base and being bent to extend from said sides of said base in a direction generally opposite to said side walls.
Claim 2
Dependent Claim
111 words
A curved snap-action movable sheet metal spring plate for a snap-action switch, said spring plate being in the form of a hollow geometric solid connectable to circuitry responsive to the snap-action switch, said spring plate comprising: an open polyagonal base having a plurality of sides; a plurality of planar side walls, one of said side walls extending from each side of said base at equal angles thereto and toward each other; an arcuate surface interconnecting said side walls; and an arcuate corner interconnecting each pair of adjacent sides of said base and being bent to extend from said sides of said base in a direction generally opposite to said side walls.
Claim 3
Dependent Claim
21 words
A movable spring plate, as claimed in claim 1, wherein: said polygonal base is triangular; and said arcuate base is spherical.
Claim 4
Dependent Claim
67 words
A snap-action switch comprising a curved spring plate as defined in claim 1 and further including: a flat stationary plate conductive means positioned adjacent to and spaced from said curved spring plate, said curved spring plate and stationary plate conductive means being connectable to circuitry responsive to a decrease in the spacing of said curved spring plate and stationary plate conductive means to provide an output signal.
Claim 5
Dependent Claim
69 words
A snap-action switch, as claimed in claim 3, wherein said stationary plate conductive means includes. a circular element adjacent to and spaced from said movable plate; and a ring-shaped element concentrically disposed with respect to said circular element, said circular element and said ring-shaped element being connectable to separate circuitry, each responsive to a decrease in spacing with respect to said curved spring plate to provide respective output signals.
Claim 6
Dependent Claim
189 words
A snap-action switch for supplying signals to a circuit, said switch comprising: a flat stationary target conductive means connectable to circuitry responsive to said switch; a curved movable conductive plate in the form of a hollow geometric solid connectable to the circuitry to provide an output signal thereto, said movable conductive plate including: an open polygonal base having a plurality of sides; a plurality of planar side walls, one of said side walls extending from each side of said base at equal angles thereto toward each other; an arcuate surface interconnecting said side walls; and an arcuate corner interconnecting each pair of adjacent sides of said base and being bent to extend from said sides of said base in a direction generally opposite to said side walls, said corners supporting said movable conductive plate adjacent said target conductive means and spaced therefrom; and means for applying pressure to said arcuate surface of said curved movable conductive plate to abruptly decrease the distance between said curved movable conductive plate and said flat stationary target conductive means to provide a signal to the circuitry in response to said decrease in distance.
Claim 7
Dependent Claim
189 words
A snap-action switch for supplying signals to a circuit, said switch comprising: a flat stationary target conductive means connectable to circuitry responsive to said switch; a curved movable conductive plate in the form of a hollow geometric solid connectable to the circuitry to provide an output signal thereto, said movable conductive plate including: an open polygonal base having a plurality of sides; a plurality of planar side walls, one of said side walls extending from each side of said base at equal angles thereto toward each other; an arcuate surface interconnecting said side walls; and an arcuate corner interconnecting each pair of adjacent sides of said base and being bent to extend from said sides of said base in a direction generally opposite to said side walls, said corners supporting said movable conductive plate adjacent said target conductive means and spaced therefrom; and means for applying pressure to said arcuate surface of said curved movable conductive plate to abruptly decrease the distance between said curved movable conductive plate and said flat stationary target conductive means to provide a signal to the circuitry in response to said decrease in distance.
Claim 8
Dependent Claim
33 words
A snap-action switch, as claimed in claim 5, wherein said flat stationary target conductive means includes: a layer of electret material on the side of the flat plate facing said curved plate. Pg,12
Claim 9
Dependent Claim
20 words
A snap-action switch, as claimed in claim 5, wherein: said polygonal base is triangular; and said arcuate surface is spherical.
References Cited (Backward Citations)
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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) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |