Patent US3853065A successfully refreshed from Google Patents.
US3853065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Canopy penetration fuze
Assignee: United States Department of the Army
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Filing: 1967-10-02
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Granted: 1974-12-10
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Expires: 1987-10-02
Abstract
Abstract A proximity-type fuze suitable for use against ground targets below a high ground cover, or canopy, such as a thick layer of high foliage. As the fuze approaches the canopy the firing signal resulting from the proximity of the canopy is utilized to operate an explosive switch or other form of latching relay, that closes a short time after receiving the firing signal. Closing of the switch connects the detonator to the firing circuit. A delay circuit allows the fuze to penetrate the ground cover before the firing circuit can again be activated. When the fuze approaches the ground the proximity of the ground produces a second firing signal which will fire the detonator.
Inventors
- 👤 M Apstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:46
CPC Classifications
F; F42; F42C; F42C13/00; F42C13/04
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
100 words
A canopy-penetration type of proximity fuze, for use against ground targets, that will descend through a high ground cover of foliage or the like without detonating and that will thereafter detonate in response to the proximity of the ground, said fuze comprising: a. proximity-response signal means to produce a signal upon approach of said means to the canopy and ground respectively; b. detonator means; c. means responsive to said signal produced upon approach to said canopy to connect a detonator in circuit with said signal means so that the signal produced upon approach to the ground will activate said detonator.
Claim 2
Dependent Claim
100 words
A canopy-penetration type of proximity fuze, for use against ground targets, that will descend through a high ground cover of foliage or the like without detonating and that will thereafter detonate in response to the proximity of the ground, said fuze comprising: a. proximity-response signal means to produce a signal upon approach of said means to the canopy and ground respectively; b. detonator means; c. means responsive to said signal produced upon approach to said canopy to connect a detonator in circuit with said signal means so that the signal produced upon approach to the ground will activate said detonator.
Claim 3
Dependent Claim
78 words
The invention according to claim 1 wherein the signal means includes: a. an oscillator-detector circuit which emits a signal indicative of the distance to a target; b. an amplifier connected to said oscillator-detector circuit; c. a firing circuit connected to the amplifier which will be operable when the signal from the amplifier exceeds a predetermined level, and having a built in delay means to delay reset of the firing means for a short period of time after operation.
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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |