US3624323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microswitch
Assignee: WP Borgmann KG
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Filing: 1970-01-05
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Granted: 1971-11-30
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Expires: 1990-01-05
Abstract
Abstract A microswitch with a flexible lamella is retained between individual contact lamellas which are cast in insulating material. The operating lamella is switchable by movement of an actuating lamella which in turn moves a scroll-spring to switch the operating lamella.
Inventors
- 👤 Wilhelm Peter Borgmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:39
CPC Classifications
H; H01; H01H; H01H5/00; H01H5/04; H01H5/18
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
286 words
A microswitch comprising at least one pair of longitudinally extending contact lamellas secured at one end thereof in generally parallel relationship a fixed distance from each other, a contact member positioned at the free opposite end of each said contact lamellas, means for making an electrical connection at each of said one ends of said contact lamellas, insulating material substantially fully covering the surface of said contact lamellas extending from said contact members to the one ends thereof, a longitudinally extending operating lamella one end of which is secured between said contact lamellas and the opposite free end of which is movable into contact with said contact members alternatively, an actuating lamella secured at one end thereof adjacent said contact lamellas with the opposite free end projecting beyond the end of said contact lamellas and movable in the same direction as said operating lamella, an insulating member secured to the free end of said actuating lamella, an insulating plate between said actuating and contact lamellas, and a compression spring member positioned between said insulating member and the free end of said actuating lamella, the spring member when not compressed being longer than the distance between the insulating member and the free end of said actuating lamella whereby said operating lamella is pressed by said spring member against either of said contact lamellas at all times and movement of said actuating lamella causes said spring to be compressed over the middle axis of the operating lamella and the free end of the operating lamella to be moved from contact with one of said contact lamellas to contact with the other of said contact lamella and said insulating material, insulating plate and insulating member serve to prevent flashover.
Claim 2
Dependent Claim
286 words
A microswitch comprising at least one pair of longitudinally extending contact lamellas secured at one end thereof in generally parallel relationship a fixed distance from each other, a contact member positioned at the free opposite end of each said contact lamellas, means for making an electrical connection at each of said one ends of said contact lamellas, insulating material substantially fully covering the surface of said contact lamellas extending from said contact members to the one ends thereof, a longitudinally extending operating lamella one end of which is secured between said contact lamellas and the opposite free end of which is movable into contact with said contact members alternatively, an actuating lamella secured at one end thereof adjacent said contact lamellas with the opposite free end projecting beyond the end of said contact lamellas and movable in the same direction as said operating lamella, an insulating member secured to the free end of said actuating lamella, an insulating plate between said actuating and contact lamellas, and a compression spring member positioned between said insulating member and the free end of said actuating lamella, the spring member when not compressed being longer than the distance between the insulating member and the free end of said actuating lamella whereby said operating lamella is pressed by said spring member against either of said contact lamellas at all times and movement of said actuating lamella causes said spring to be compressed over the middle axis of the operating lamella and the free end of the operating lamella to be moved from contact with one of said contact lamellas to contact with the other of said contact lamella and said insulating material, insulating plate and insulating member serve to prevent flashover.
Claim 3
Dependent Claim
15 words
A microswitch according to claim 1 wherein said compression spring member is a scroll spring.
Claim 4
Dependent Claim
89 words
A microswitch according to claim 1 wherein said contact lamellas and said operating lamella are secured together by a pair of metal plates and at least one rivet passing through said metal plates and said contact and operating lamellas located therebetween, said insulating material comprising a first insulating element surrounding the surface of one of said contact lamellas and the exterior cylindrical surface of said rivet and a second insulating element surrounding the surface of the other of said contact lamellas and a part of said first insulating element.
Claim 5
Dependent Claim
51 words
A microswitch according to claim 3 wherein one of said metal plates adjacent said actuating lamella extends towards the free end of said actuating lamella a spaced distance therefrom anD includes adjusting means extending between said one plate and said actuating lamella for adjusting the rest position of said actuating lamella.
Claim 6
Dependent Claim
49 words
A microswitch as claimed in claim 1 comprising a plurality of pairs of contact lamellas and an operating lamella located between each pair and an insulating plate secured to the free ends of said operating lamellas, said compression spring member extending between said actuating lamella and said insulating plate.
Claim 7
Dependent Claim
14 words
A microswitch according to claim 1 wherein said actuating lamella comprises a bimetal strip.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |