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US3678859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two stage impact fuze
Assignee: United States Department of the Air Force
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Filing: 1970-10-06
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Granted: 1972-07-25
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Expires: 1990-10-06
Abstract
Abstract A two-stage omni-directional impact fuze having a firing pin assembly and a rotor containing a detonator. A pressure actuated locking arm assembly allows for the rotation of the rotor to the first stage arming position, while the removal of a wind tab allows for the rotation of the rotor to the second stage or fully armed position. In this position under impact in any direction a spherical weight located adjacent to the firing pin assembly causes movement thereof against the detonator and subsequent detonation of the fuze. It is this pressure actuation in conjunction with two-stage arming and omni-directional impact detonation which makes this fuze extremely safe and reliable in operation.
Inventors
- 👤 Jerry J Wesson
- 👤 Thomas W Boulter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:52
CPC Classifications
F; F42; F42C; F42C1/00; F42C1/02; F42C1/04; F42C1/06
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
146 words
A two stage omni-directional impact fuze comprising a fuze guide, a fuze body mounted within said guide, a rotor rotatably mounted within said body, means operably connected to said rotor for causing rotation thereof, a wind tab, said wind tab having locking means thereon for engaging said rotor to prevent removal of said wind tab, at least one locking arm assembly, said locking arm assembly being movably mounted on said body and capable of preventing the rotation of said rotor in the unarmed position, and a firing pin lever assembly pivotally mounted at one end thereof to said body whereby upon movement of said locking arm assembly said rotor rotates to the first stage arming position thereby disengaging said wind tab locking means from said rotor and upon complete removal of said wind tab from said fuze body said rotor rotates to the fully armed position.
Claim 2
Dependent Claim
146 words
A two stage omni-directional impact fuze comprising a fuze guide, a fuze body mounted within said guide, a rotor rotatably mounted within said body, means operably connected to said rotor for causing rotation thereof, a wind tab, said wind tab having locking means thereon for engaging said rotor to prevent removal of said wind tab, at least one locking arm assembly, said locking arm assembly being movably mounted on said body and capable of preventing the rotation of said rotor in the unarmed position, and a firing pin lever assembly pivotally mounted at one end thereof to said body whereby upon movement of said locking arm assembly said rotor rotates to the first stage arming position thereby disengaging said wind tab locking means from said rotor and upon complete removal of said wind tab from said fuze body said rotor rotates to the fully armed position.
Claim 3
Dependent Claim
64 words
A two stage omni-directional impact fuze as defined in claim 1 wherein said fuze body has a top portion and a spherical weight is located between said firing pin lever assembly and said top portion of said body whereby movement of said spherical weight in any direction while said fuze is in said fully armed position causes movement of said firing pin lever assembly.
Claim 4
Dependent Claim
48 words
A two-stage omni-directional impact fuze as defined in claim 2 further comprising a biasing means, said biasing means being mounted between said rotor and said firing pin assembly for moving said body and said wind tab relative to said guide during the first stage arming of said fuze.
Claim 5
Dependent Claim
68 words
A two-stage omni-directional impact fuze as defined in claim 3 wherein said firing pin lever assembly has a firing pin mounted at the other end thereof and said rotor has a detonator thereon, whereby in the unarmed position of said fuze said firing pin and said detonator are 180* apart and in said fully armed position said firing pin and said detonator are in alignment with each other.
Claim 6
Dependent Claim
63 words
A two-stage omni-directional impact fuze as defined in claim 4 wherein said rotor has at least one rotor locking tab thereon and said wind tab has a stop means thereon, whereby in said unarmed position said rotor locking tab engages said locking arm assembly and in said first stage arming position said rotor locking tab engages said stop means on said wind tab.
Claim 7
Dependent Claim
44 words
A two-stage omni-directional impact fuze as defined in claim 5 wherein said rotor has a cutout portion therein and a rotor stop is fixedly secured to said body whereby in said fully armed position said rotor stop abuts the end of said cutout portion.
Claim 8
Dependent Claim
28 words
A two-stage omni-directional impact fuze as defined in claim 6 wherein said fuze guide and said fuze body have a pressure window therein adjacent said locking arm assembly.
Claim 9
Dependent Claim
30 words
A two stage omni-directional impact fuze as defined in claim 7 wherein said top portion of said body and said firing pin lever assembly are of a converging conical configuration.
Claim 10
Dependent Claim
32 words
A two stage omni-directional impact fuze as defined in claim 8 further comprising a rotor pin fixedly secured to said guide and protruding into said body, said rotor being rotatably mounted thereon.
Claim 11
Dependent Claim
19 words
A two stage omni-directional impact fuze as defined in claim 9 wherein said biasing means is a leaf spring.
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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |