Patent US3638151A successfully refreshed from Google Patents.
US3638151A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contact device
Assignee: US Philips Corp
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Filing: 1970-09-15
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Granted: 1972-01-25
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Expires: 1990-09-15
Abstract
Abstract Contact device comprising an electrically conductive contact spring clamped tight at one end, whereas its freely movable end is located opposite a countercontact, and comprising an energizing coil controlling the contact spring and having its field extending in the direction of length of the contact spring, which is provided at its movable part near the clamped end with at least one permanent magnet surrounded by the energizing coil and polarized transversely of the direction of length of the contact spring.
Inventors
- 👤 Hendrik Van Der Heide
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:21
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/28; H01H51/284
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
105 words
A contact device comprising at least one electrically conductive contact spring clamped tight at one end and having its other freely movable end located opposite a countercontact, at least one energizing coil controlling the contact spring and having its field extending in the direction of length of the contact spring, at least one permanent magnet provided on the movable part of the contact spring near the clamped end and polarized transversely to the direction of length of the contact spring and adapted to be moved by the field of the energizing coil, said permanent magnet being arranged in the space surrounded by the energizing coil.
Claim 2
Dependent Claim
105 words
A contact device comprising at least one electrically conductive contact spring clamped tight at one end and having its other freely movable end located opposite a countercontact, at least one energizing coil controlling the contact spring and having its field extending in the direction of length of the contact spring, at least one permanent magnet provided on the movable part of the contact spring near the clamped end and polarized transversely to the direction of length of the contact spring and adapted to be moved by the field of the energizing coil, said permanent magnet being arranged in the space surrounded by the energizing coil.
Claim 3
Dependent Claim
33 words
A contact device as claimed in claim 1 comprising two partly overlapping, parallel contact springs clamped tight in a hermetically closed envelope, characterized in that the energizing coil surrounds the hermetically closed envelope.
Claim 4
Dependent Claim
52 words
A contact device as claimed in claim 1 characterized in that the contact spring which is provided with a permanent magnet comprises a readily flexible portion which is located between the part of the contact spring provided with the permanent magnet and the part of the contact spring which is clamped tight.
Claim 5
Dependent Claim
64 words
A contact device as claimed in claim 1 wherein said countercontact comprises a second electrically conductive contact spring, a sealed envelope, said first and second contact springs being clamped tight within said envelope at opposite ends of the envelope and extending parallel to one another and partly overlapping at their free ends, said coil surrounding the sealed envelope in the vicinity of the magnet.
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) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |