US3675579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure actuated safety and arming device
Assignee: United States Department of the Navy
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Filing: 1970-02-25
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Granted: 1972-07-11
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Expires: 1990-02-25
Abstract
Abstract A safety and arming device having a spring biased bellows inflatable under air pressure of a predetermined magnitude. A tube is connected to the bellows and a stud is fixed to the inside of the tube. A shaft having a helical slot formed therein fits into the tube with the stud extending into the helical slot and an arming rotor is fixed to the end of the shaft. Under air pressure of a predetermined magnitude, the bellows expands and moves the tube which causes the stud, which is fixed to the inside of the tube and riding in the helical slot, to rotate the shaft and thereby rotate the arming rotor. A gear rack connected to the outside of the tube is in engagement with an escapement mechanism to limit the rate of travel of the bellows to preclude premature arming under the influence of shocks.
Inventors
- 👤 Sherman L Min
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:08
CPC Classifications
F; F42; F42C; F42C5/00; F42C5/02; F42C15/00; F42C15/28; F42C15/29; F42C15/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
205 words
A safety and arming device for an orDnance comprising: fluid pressure operated means for changing from a first position to a second position under the influence of fluid pressure above a predetermined magnitude; biasing means acting on said fluid pressure operated means in opposition to the fluid pressure for returning said fluid pressure operated means to a first position when the fluid pressure decreases below a predetermined magnitude; arming means movable between an unarmed position wherein an explosive train to the ordnance is interrupted and an armed position wherein the explosive train to the ordnance is complete; and transmission means connecting said fluid pressure operated means to said arming for causing movement of said arming means from an unarmed position to an armed position when said fluid pressure operated means changes from the first position to the second position under influence of fluid pressure above said predetermined magnitude and for returning said arming means to an unarmed position when said fluid pressure operated means is returned to the first position; and switch means coupled to said first fluid pressure operated means for establishing electrical contact between a delivery vehicle and an ordnance only while said fluid pressure operated means is located in the second position.
Claim 2
Dependent Claim
205 words
A safety and arming device for an orDnance comprising: fluid pressure operated means for changing from a first position to a second position under the influence of fluid pressure above a predetermined magnitude; biasing means acting on said fluid pressure operated means in opposition to the fluid pressure for returning said fluid pressure operated means to a first position when the fluid pressure decreases below a predetermined magnitude; arming means movable between an unarmed position wherein an explosive train to the ordnance is interrupted and an armed position wherein the explosive train to the ordnance is complete; and transmission means connecting said fluid pressure operated means to said arming for causing movement of said arming means from an unarmed position to an armed position when said fluid pressure operated means changes from the first position to the second position under influence of fluid pressure above said predetermined magnitude and for returning said arming means to an unarmed position when said fluid pressure operated means is returned to the first position; and switch means coupled to said first fluid pressure operated means for establishing electrical contact between a delivery vehicle and an ordnance only while said fluid pressure operated means is located in the second position.
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |