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US3892931A Expired / Lapsed US ⏱️ 0.0 years remaining

Miniature momentary rotary type switch for resetting electronic watch digital display

Assignee: TE Connectivity Corp
•
Filing: 1974-03-15
•
Granted: 1975-07-01
•
Expires: 1994-03-15
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Abstract

Abstract A switch having planar contacts and a rotary brush engageable with the contacts to perform a switching function has printed circuit board mounting lugs integral with planar contact circuitry. The lugs allow mounting of the switch to the edge of the printed circuit board and is of miniature size suitable for use with a watch stem of an electronic wristwatch. Tactile feel and positive detent of the switch rotor is provided with a resilient beam which detents against the irregular surface of a cam provided on the rotor. The cam has an offset finger that resiliently deflects a return spring which returns the switch rotor to an off position providing only a momentary switching function when the rotor is manually rotated and then released. The switch parts are designed for stackable assembly without a need for fasteners. The switching function, in this instance, is associated with resetting of the hour and minute time display.

Inventors

  • 👤 Joseph Larue Lockard

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 21:31
CPC Classifications
H; H01; H01H; H01H19/00; H01H19/46; H01H19/48; G; G04; G04C; G04C3/00; G04C3/001; G04C3/005; H01H2300/00; H01H2300/016

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 134 words
A switch, comprising: a base having recessed portions, coplanar circuits secured to said base and defining a plurality of switch poles, portions of said circuits projecting outwardly of the plane of said circuits and into said recess portions to provide mounting lugs, a cam having a shaft received rotatably through said base, a rotor mounted on said shaft having brush contacts thereon engageable selectively on said circuits upon rotation of said rotor, said circuits being interposed between said cam and said rotor, and resilient means encircling said shaft and having end portions engaged on said base, said cam being rotatable from a central position in either of two directions biasing resiliently the corresponding end portions of said spring means to store resilient spring energy for return rotation of said cam to said central position.
Claim 2
Dependent Claim 134 words
A switch, comprising: a base having recessed portions, coplanar circuits secured to said base and defining a plurality of switch poles, portions of said circuits projecting outwardly of the plane of said circuits and into said recess portions to provide mounting lugs, a cam having a shaft received rotatably through said base, a rotor mounted on said shaft having brush contacts thereon engageable selectively on said circuits upon rotation of said rotor, said circuits being interposed between said cam and said rotor, and resilient means encircling said shaft and having end portions engaged on said base, said cam being rotatable from a central position in either of two directions biasing resiliently the corresponding end portions of said spring means to store resilient spring energy for return rotation of said cam to said central position.
Claim 3
Dependent Claim 39 words
The structure as recited in claim 1, and further including: two stop means on said base defining limits to rotation of said cam, said cam being engageable on respective stop means to limit rotation thereof in said two directions.
Claim 4
Dependent Claim 58 words
The structure as recited in claim 2, and further including: at least a pair of blocks secured to said base and rotatably receiving said rotor therebetween, said blocks having stops thereon defining limits to rotation of said rotor, and said rotor having a projection engageable on a corresponding stop upon rotation of said cam from said central position.

References Cited (Backward Citations)

US2121671A Cited
US3214536A Cited
US3271531A Cited
US3271534A Cited
US3284584A Cited
US3470333A Cited
US3506798A Cited
US3643044A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-06-30 1978-12-30 1979-07-01 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-06-30 1982-12-30 1983-07-01 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-06-30 1986-12-30 1987-07-01 $7700.00 Window Closed / Lapsed

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