Patent US3853056A successfully refreshed from Google Patents.
US3853056A
Expired / Lapsed
US
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Safety and arming device
Assignee: United States Department of the Navy
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Filing: 1963-12-30
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Granted: 1974-12-10
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Expires: 1983-12-30
Abstract
Abstract 1. A safety and arming device for underwater ordnance items comprising A HOUSING, A DETONATOR MOUNTED ON SAID HOUSING. A BOOSTER MOUNTED ON SAID HOUSING IN AXIAL ALIGNMENT WITH SAID DETONATOR, A SHUTTER MOVABLY MOUNTED ON SAID HOUSING BETWEEN SAID DETONATOR AND SAID BOOSTER, A TRANSMISSION CHARGE CARRIED BY SAID SHUTTER AND OPERABLE TO COMPLETE AN EXPLOSIVE TRAIN WHEN AXIALLY ALIGNED WITH SAID DETONATOR AND SAID BOOSTER. RESILIENT MEANS NORMALLY URGING SAID SHUTTER AND SAID TRANSMISSION CHARGE OUT OF AXIAL ALIGNMENT WITH SAID DETONATOR AND SAID BOOSTER WHEREBY THE EXPLOSIVE TRAIN IS INTERRUPTED AND THE ORDNANCE ITEM IS DISARMED, AND A FLOAT HAVING A SPECIFIC GRAVITY LESS THAN ONE POSITIONED WITHIN A CAVITY IN SAID HOUSING IN FLUID COMMUNICATION WITH THE WATER WHEN THE HOUSING IS IMMERSED THEREIN AND DIRECTLY CONNECTED TO SAID SHUTTER WHEREBY, UPON IMMERSION OF THE ORDANCE ITEM IN WATER, SAID SHUTTER IS MOVED BY SAID FLOAT AGAINST THE URGING OF SAID RESIIENT MEANS TO AXIALLY ALIGN SAID TRANSMISSION CHARGE WITH SAID DETONATOR AND SAID BOOSTER TO COMPLETE THE EXPLOSIVE TRAIN AND ARM THE ORDNANCE ITEM.
Inventors
- 👤 L Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:20
CPC Classifications
F; F42; F42C; F42C14/00; F42C14/04; F42C15/00; F42C15/18; F42C15/184
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
178 words
A safety and arming device for underwater ordnance items comprising: a housing, a detonator mounted on said housing, a booster mounted on said housing in axial alignment with said detonator, a shutter movably mounted on said housing between said detonator and said booster, a transmission charge carried by said shutter and operable to complete an explosive train when axially aligned with said detonator and said booster, resilient means normally urging said shutter and said transmission charge out of axial alignment with said detonator and said booster whereby the explosive train is interrupted and the ordnance item is disarmed, and a float having a specific gravity less than one positioned within a cavity in said housing in fluid communication with the water when the housing is immersed therein and directly connected to said shutter whereby, upon immersion of the ordnance item in water, said shutter is moved by said float against the urging of said resilient means to axially align said transmission charge with said detonator and said booster to complete the explosive train and arm the ordnance item.
Claim 2
Dependent Claim
178 words
A safety and arming device for underwater ordnance items comprising: a housing, a detonator mounted on said housing, a booster mounted on said housing in axial alignment with said detonator, a shutter movably mounted on said housing between said detonator and said booster, a transmission charge carried by said shutter and operable to complete an explosive train when axially aligned with said detonator and said booster, resilient means normally urging said shutter and said transmission charge out of axial alignment with said detonator and said booster whereby the explosive train is interrupted and the ordnance item is disarmed, and a float having a specific gravity less than one positioned within a cavity in said housing in fluid communication with the water when the housing is immersed therein and directly connected to said shutter whereby, upon immersion of the ordnance item in water, said shutter is moved by said float against the urging of said resilient means to axially align said transmission charge with said detonator and said booster to complete the explosive train and arm the ordnance item.
Claim 3
Dependent Claim
39 words
A safety and arming device as defined in claim 1 wherein a soluble element is connected to said shutter for restraining said float from arming the ordnance item until said soluble element has dissolved whereby the arming is delayed.
Claim 4
Dependent Claim
47 words
A safety and arming device as defined in claim 1 wherein a removable arming wire is connected to said shutter for restraining said float from moving said shutter to the armed position prior to removal of said wire whereby inadvertent arming of the ordnance item is precluded.
Claim 5
Dependent Claim
17 words
A safety and arming device as defined in claim 1 wherein said float is formed of cork.
Claim 6
Dependent Claim
18 words
A safety and arming device as defined in claim 1 wherein said float is a hollow metal float.
Claim 7
Dependent Claim
20 words
A safety and arming device as defined in claim 1 wherein said float is formed of a foamed plastic material.
Claim 8
Dependent Claim
244 words
A safety and arming device for underwater ordnance items comprising: a housing, a detonator mounted on said housing, a booster mounted on said housing in axial alignment with said detonator, a shutter movably mounted on said housing between said detonator and said booster, a transmission charge carried by said shutter and operable to complete an explosive train when axially aligned with said detonator and said booster, resilient means normally urging said shutter and said transmission charge out of the axial alignment with said detonator and said booster whereby the explosive train is interrupted and the ordnance item is disarmed, a float having a specific gravity less than one positioned within a cavity in said housing in fluid communication with the water when the housing is immersed therein and directly connected to said shutter whereby, upon immersion of the ordnance item in water, said shutter is moved by said float against the urging of said resilient means to axially align said transmission charge with said detonator and said booster to complete the explosive train and arm the ordnance item, a soluble washer connected to said shutter for restraining said float from arming the ordnance item until said soluble washer has dissolved whereby the arming is delayed, and a removable arming wire disposed in an aperture in said shutter for restraining said float from moving said shutter to the armed position prior to removal of said wire whereby inadvertent arming of the ordnance item is precluded.
Claim 9
Dependent Claim
244 words
A safety and arming device for underwater ordnance items comprising: a housing, a detonator mounted on said housing, a booster mounted on said housing in axial alignment with said detonator, a shutter movably mounted on said housing between said detonator and said booster, a transmission charge carried by said shutter and operable to complete an explosive train when axially aligned with said detonator and said booster, resilient means normally urging said shutter and said transmission charge out of the axial alignment with said detonator and said booster whereby the explosive train is interrupted and the ordnance item is disarmed, a float having a specific gravity less than one positioned within a cavity in said housing in fluid communication with the water when the housing is immersed therein and directly connected to said shutter whereby, upon immersion of the ordnance item in water, said shutter is moved by said float against the urging of said resilient means to axially align said transmission charge with said detonator and said booster to complete the explosive train and arm the ordnance item, a soluble washer connected to said shutter for restraining said float from arming the ordnance item until said soluble washer has dissolved whereby the arming is delayed, and a removable arming wire disposed in an aperture in said shutter for restraining said float from moving said shutter to the armed position prior to removal of said wire whereby inadvertent arming of the ordnance item is precluded.
Claim 10
Dependent Claim
18 words
A safety and arming device as defined in claim 7 wherein said float is formed of solid cork.
Claim 11
Dependent Claim
18 words
A safety and arming device as defined in claim 7 wherein said float is a hollow metal float.
Claim 12
Dependent Claim
21 words
A safety and arming device as defined in claim 7 wherein said float is formed of a foamed plastic material. >
References Cited (Backward Citations)
US1473148A
Cited
US2960030A
Cited
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 |