US3634638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical switch responsive to sudden movements of an external element
Assignee: Israel Aircraft Industries Ltd
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Filing: 1970-06-24
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Granted: 1972-01-11
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Expires: 1990-06-24
Abstract
Abstract An electric switch responsive to sudden movements of an external element, but not to slow movements thereof, comprises a pair of electrical contacts separated by a yieldable connection which causes one to move with the other, and a flowable material, such as silicone putty, tending to resist the movement of the one contact with the other, the flowable material being free-flowing under low stress but not under a sudden high stress, whereby under s sudden movement of the external element and the one contact, the flowable material resists the movement of the other while the yieldable connection yields, thus effecting actuation of the switch; whereas upon a slow movement of the external element and the one contact, the flowable material flows and permits the other contact to move therewith, thus not effecting actuation of the switch.
Inventors
- 👤 Ori Even-Tov
- 👤 Pinchas Dagan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:58
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/02; G08B13/12; G08B13/122; H; H01; H01H; H01H35/00; H01H35/14
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
192 words
An electrical switch responsive to sudden movements of an external element, characterized in that it includes a housing formed with an internal chamber containing a first electrical contact adapted to be physically connected to said external element to be moved thereby, a second electrical contact movable relative to said first contact to effect the actuation of said switch, a yieldable connection between said first and second contacts tending to cause the latter to move with the former upon the movement of the former by said external element, and a flowable material tending to resist the movement of said second contact with said first contact, said flowable material being substantially more free flowing under a low stress than under a sudden high stress, whereby a sudden movement of the external element causes the flowable material to resist the movement of said second contact with said first contact while said yieldable connection yields, thus effecting actuation of said switch, whereas a slow movement of the external element causes the flowable material to permit the movement of said second contact with said first contact by said yieldable connection, thus not effecting actuation of said switch.
Claim 2
Dependent Claim
192 words
An electrical switch responsive to sudden movements of an external element, characterized in that it includes a housing formed with an internal chamber containing a first electrical contact adapted to be physically connected to said external element to be moved thereby, a second electrical contact movable relative to said first contact to effect the actuation of said switch, a yieldable connection between said first and second contacts tending to cause the latter to move with the former upon the movement of the former by said external element, and a flowable material tending to resist the movement of said second contact with said first contact, said flowable material being substantially more free flowing under a low stress than under a sudden high stress, whereby a sudden movement of the external element causes the flowable material to resist the movement of said second contact with said first contact while said yieldable connection yields, thus effecting actuation of said switch, whereas a slow movement of the external element causes the flowable material to permit the movement of said second contact with said first contact by said yieldable connection, thus not effecting actuation of said switch.
Claim 3
Dependent Claim
15 words
An electrical switch as defined in claim 1, wherein said flowable material is silicone putty.
Claim 4
Dependent Claim
39 words
An electrical switch as defined in claim 1, wherein said second contact is a metal sleeve, and said yieldable connection is a resilient insulating sleeve normally supporting said second contact around and out of engagement with said first contact.
Claim 5
Dependent Claim
50 words
An electrical switch as defined in claim 3, wherein said resilient sleeve is carried by a resilient cap closing the upper end of said housing, said resilient cap supporting said first contact in suspension and including a rigid member passing therethrough and adapted to be connected to said external element.
Claim 6
Dependent Claim
31 words
An electrical switch as defined in claim 4, wherein said flowable material fills said housing chamber to the level of said second contact, the latter being tapered at its lower end.
Claim 7
Dependent Claim
36 words
An electrical switch as defined in claim 1, further including a metal bracket arm attached to the housing at the lower end thereof, there being an electrical connection between saiD second contact and said bracket arm.
Claim 8
Dependent Claim
27 words
An electrical switch as defined in claim 6, further including a second bracket arm attached to a midportion of said housing for mounting same to a support.
Claim 9
Dependent Claim
39 words
An electrical switch as defined in claim 2, wherein said second contact is a metal sleeve, and said yieldable connection is a resilient insulating sleeve normally supporting said second contact around and out of engagement with said first contact.
Claim 10
Dependent Claim
50 words
An electrical switch as defined in claim 8, wherein said resilient sleeve is carried by a resilient cap closing the upper end of said housing, said resilient cap supporting said first contact in suspension and including a rigid member passing therethrough and adapted to be connected to said external element.
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) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |