US3706867A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic anti-intrusion device
Assignee: United States Department of the Army
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Filing: 1971-02-18
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Granted: 1972-12-19
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Expires: 1991-02-18
Abstract
Abstract An electronic anti-intrusion device having an electric noisemaker activated by an anti-disturbance switch, which is sensitive to specific physical movement, a mechanical switch for simultaneously energizing the device and unshorting the noisemaker after dispersal, an electronic timing circuit for delaying activation during a first interval of time and an electronic circuit for activating the noisemaker any time after the first interval of time regardless of whether the antidisturbance switch is in an open or closed position.
Inventors
- 👤 Henry T Rand
- 👤 Maxine Bohacz
- 👤 Jerry Lyon
- 👤 Robert L Pitman
- 👤 Donald N Shaw
- 👤 John Bianchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:11
CPC Classifications
H; H01; H01H; H01H35/00; H01H35/14; H01H35/144
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
200 words
An anti-disturbance switch which comprises: a flanged header cup having a plurality of orifices in a closed end wall and a flanged rim on an open end; an insulator partially filling said header cup; a first contact lead, longitudinally held in said insulator, having one end fixed to an inner surface of said closed end and the other end partially protruding out of said open end; a plurality of second contact leads each longitudinally held in said insulator aligned within one of said orifices partially protrudes through said header cup closed end wall and partially protrudes through said open end, said insulator electrically isolates said plurality of second contact leads from said header cup; a flanged header cover having a closed end wall and a flanged open end larger than said flanged header cup, and positioned circumambient to said flanged header cup forms an enclosed space; and a plurality of contact balls located within said enclosed space free to roll when said anti-intrusion device is moved, causing said first and said plurality of second lead contacts to be electrically connected when said plurality of contact balls simultaneously touch said plurality of second contact leads and said header cup top surface.
Claim 2
Dependent Claim
200 words
An anti-disturbance switch which comprises: a flanged header cup having a plurality of orifices in a closed end wall and a flanged rim on an open end; an insulator partially filling said header cup; a first contact lead, longitudinally held in said insulator, having one end fixed to an inner surface of said closed end and the other end partially protruding out of said open end; a plurality of second contact leads each longitudinally held in said insulator aligned within one of said orifices partially protrudes through said header cup closed end wall and partially protrudes through said open end, said insulator electrically isolates said plurality of second contact leads from said header cup; a flanged header cover having a closed end wall and a flanged open end larger than said flanged header cup, and positioned circumambient to said flanged header cup forms an enclosed space; and a plurality of contact balls located within said enclosed space free to roll when said anti-intrusion device is moved, causing said first and said plurality of second lead contacts to be electrically connected when said plurality of contact balls simultaneously touch said plurality of second contact leads and said header cup top surface.
References Cited (Backward Citations)
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US3559203A
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US3504632A
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Cited
US3575114A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |