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US3721779A Expired / Lapsed US ⏱️ 0.0 years remaining

Sliding action electrical switch with ramp portions between contacts and insulating strips

Assignee: Indak Manufacturing Corp
•
Filing: 1971-06-04
•
Granted: 1973-03-20
•
Expires: 1991-06-04
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Abstract

Abstract The illustrated switch comprises an insulating carriage which is slidable longitudinally within a casing. The carriage is arranged to be actuated by a pin which projects into an opening in the carriage through a slot in the casing. In this case, the pin is movable along a curved path and is slidable in the opening, which is laterally elongated. A contactor is mounted on the carriage and is provided with three contact points which are engageable with three contact strips secured to an insulating support on the casing. A spring is provided to bias the contactor toward the contact strips. The strips extend parallel to the path of movement of the contactor and are disposed along laterally spaced lines. The line of the first strip extends between the lines of the second and third strips. Two terminals are connected to the first strip and the second and third strips, which are connected together. The switch has an off position in which the first contact point engages the first strip, while the second and third contact points engage insulating bosses or projections disposed opposite the ends of the second and third strips. Upon movement of the contactor, the second and third contact points move smoothly from the insulating bosses into substantially simultaneous engagement with the ends of the second and third strips, which are provided with inclined ramp portions. Throughout a range of movement of the carriage, the three contact points engage the three contact strips.

Inventors

  • 👤 A Raab

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 13:09
CPC Classifications
H; H01; H01H; H01H15/00; H01H15/02; H01H15/06

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 279 words
An electrical switch, comprising a casing, an insulating carriage slidable linearly within said casing along a predetermined path, first, second and third contact strips disposed opposite said carriage and extending parallel to the path thereof, said casing including insulating means for supporting said contact strips, said strips being disposed along parallel lines which are spaced apart laterally, the line of said first strip being disposed between the lines of said second and third strips, conductive means connected between said second and third strips, a first terminal connected to said first strip, a second terminal connected to said second and third strips, and a contactor mounted on said carriage and engageable with said sTrips, said contactor including first, second and third contact points projecting therefrom toward said strips, said first contact point being slidably engaged with said first strip, said second and third contact points being slidable into and out of engagement with said respective second and third strips as said carriage is moved in opposite directions within said casing, said second and third strips including end portions for initial engagement by said second and third contact points, said insulating means including insulating projections adjacent said end portions and substantially flush with said second and third strips, said end portions of said second and third strips including ramp elements bent at an inclined angle therefrom for engagement by said second and third contact points whereby said second and third contact points are enabled to slide smoothly between said insulating projections and said ramp elements on said end portions of said second and third strips, said insulating means having openings adjacent said insulating projections for receiving and locating said ramp elements.
Claim 2
Dependent Claim 279 words
An electrical switch, comprising a casing, an insulating carriage slidable linearly within said casing along a predetermined path, first, second and third contact strips disposed opposite said carriage and extending parallel to the path thereof, said casing including insulating means for supporting said contact strips, said strips being disposed along parallel lines which are spaced apart laterally, the line of said first strip being disposed between the lines of said second and third strips, conductive means connected between said second and third strips, a first terminal connected to said first strip, a second terminal connected to said second and third strips, and a contactor mounted on said carriage and engageable with said sTrips, said contactor including first, second and third contact points projecting therefrom toward said strips, said first contact point being slidably engaged with said first strip, said second and third contact points being slidable into and out of engagement with said respective second and third strips as said carriage is moved in opposite directions within said casing, said second and third strips including end portions for initial engagement by said second and third contact points, said insulating means including insulating projections adjacent said end portions and substantially flush with said second and third strips, said end portions of said second and third strips including ramp elements bent at an inclined angle therefrom for engagement by said second and third contact points whereby said second and third contact points are enabled to slide smoothly between said insulating projections and said ramp elements on said end portions of said second and third strips, said insulating means having openings adjacent said insulating projections for receiving and locating said ramp elements.
Claim 3
Dependent Claim 27 words
A switch according to claim 1, in which said first contact strip includes an end portion fitted between said insulating projections and thereby restrained against lateral movement.

References Cited (Backward Citations)

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US2912873A Cited
US3225150A Cited
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US3051801A Cited
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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) 1976-03-19 1976-09-18 1977-03-20 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-03-19 1980-09-18 1981-03-20 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-03-19 1984-09-18 1985-03-20 $7700.00 Window Closed / Lapsed

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