US3583319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Delay arming mechanism
Assignee: Hamilton Watch Co
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Filing: 1969-03-20
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Granted: 1971-06-08
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Expires: 1989-03-20
Abstract
Abstract The mechanism includes a housing having a blast opening through one end wall coincident with the spin axis of the projectile and a fuse mechanism including an explosive charge adjacent the opposite end wall. Three rotor assemblies mounted on pivots offset from the projectile spin axis, overlie the blast hole with their rotors disposed to initially prevent propagation of the explosive output from the charge to the blast hole. Two such assemblies have their centers of gravity coincident with the projectile spin axis while one rotor assembly has its center of gravity slightly offset from the spin axis. The first rotor assembly is locked by a pair of detents and the second and third assemblies are locked by cams carried on the first and second assemblies respectively. When the projectile spins, the detents unlock the first rotor assembly, and centrifugal force causes it to rotate to a position unlocking the second rotor assembly. The first rotor assembly drives the second rotor assembly such that its center of gravity is offset from the projectile spin axis. The second rotor assembly then rotates under centrifugal force to positions to respectively unlock the third rotor assembly and drive the latter such that its center of gravity is offset from the spin axis. The three rotors rotate under centrifugal force to locate cutout portions in line with the blast hole and the third rotor places a detonator in direct alignment with the blast hole. These rotor movements permit explosive propagation through the delay arming mechanism.
Inventors
- 👤 John O James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:53
CPC Classifications
F; F42; F42C; F42C15/00; F42C15/20; F42C15/22
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
204 words
Apparatus for delaying transmission of a fuse output to a charge in a rifle-launched projectile comprising a housing; first and second rotor assemblies carried by said housing for rotation about axes substantially parallel to and laterally offset from the spin axis of the projectile; at least portions of said rotor assemblies in their initial positions being located to interrupt transmission of the fuse output to the charge; said first rotor assembly having its center of gravity offset from the pivotal axis thereof and initially offset from the spin axis of the projectile; said second rotor assembly having its center of gravity offset from its pivotal axis and initially substantially coincident with the spin axis of the projectile; said first rotor assembly being rotatable from said initial position into a second position in response to rotation of the projectile; means responsive to the rotation of said first rotor assembly for offsetting the center of gravity of said second rotor assembly from the spin axis of the projectile, said second rotor assembly being thereby rotatable in response to rotation of the projectile into a second position, said rotor assemblies being formed to enable transmission of the fuse output to the charge when it their second positions.
Claim 2
Dependent Claim
204 words
Apparatus for delaying transmission of a fuse output to a charge in a rifle-launched projectile comprising a housing; first and second rotor assemblies carried by said housing for rotation about axes substantially parallel to and laterally offset from the spin axis of the projectile; at least portions of said rotor assemblies in their initial positions being located to interrupt transmission of the fuse output to the charge; said first rotor assembly having its center of gravity offset from the pivotal axis thereof and initially offset from the spin axis of the projectile; said second rotor assembly having its center of gravity offset from its pivotal axis and initially substantially coincident with the spin axis of the projectile; said first rotor assembly being rotatable from said initial position into a second position in response to rotation of the projectile; means responsive to the rotation of said first rotor assembly for offsetting the center of gravity of said second rotor assembly from the spin axis of the projectile, said second rotor assembly being thereby rotatable in response to rotation of the projectile into a second position, said rotor assemblies being formed to enable transmission of the fuse output to the charge when it their second positions.
Claim 3
Dependent Claim
36 words
Apparatus according to claim 1 including means for normally disabling said second rotor assembly from rotation, said disabling means being responsive to rotation of said first rotor assembly to enable said second rotor assembly for rotation.
Claim 4
Dependent Claim
32 words
Apparatus according to claim 2 wherein said disabling means includes a portion of said first rotor assembly engageable with a portion of said second rotor assembly for preventing rotation of the latter.
Claim 5
Dependent Claim
40 words
Apparatus according to claim 2 including means for normally disabling said first rotor assembly from rotation, said first rotor assembly disabling means being responsive to a predetermined spin velocity of the projectile to enable said first rotor assembly for rotation.
Claim 6
Dependent Claim
32 words
Apparatus according to claim 1 including means for normally disabling said rotor assemblies from rotation and operable in response to rotation of said projectile to sequentially enable said rotor assemblies for rotation.
Claim 7
Dependent Claim
31 words
Apparatus according to claim 1 wherein said offsetting means includes a portion of said first rotor assembly engageable with said second rotor assembly for rotating the latter from its initial position.
Claim 8
Dependent Claim
68 words
Apparatus according to claim 1 wherein each of said rotor assemblies includes a rotor, portions of said rotors inItially overlying one another and the charge to interrupt transmission of the fuse output to the charge, said rotors having cutout portions, said cutout portions being in alignment one with the other when said rotors lie in said second positions to enable transmission of the fuse output to the charge.
Claim 9
Dependent Claim
136 words
Apparatus according to claim 1 wherein said first rotor assembly includes a rotor carrying a pin and a cam, said second rotor assembly including a rotor having a shoulder and a cam follower, means for disabling said first rotor assembly from rotation when said first rotor lies in said initial position, said cam and cam follower being initially engageable with one another for disabling said second rotor from rotation, said first rotor-disabling means being responsive to a predetermined spin velocity of the projectile to enable said first rotor for rotation, said cam and cam follower being disengageable one from the other to enable rotation of said second rotor in response to rotation of said first rotor, said pin being engageable with said shoulder in response to rotation of said first rotor to drive said second rotor.
Claim 10
Dependent Claim
152 words
Apparatus according to claim 1 including a third rotor assembly carried by said housing for rotation about an axis substantially parallel to and laterally offset from the spin axis of the projectile, at least a portion of said third rotor assembly being initially located to interrupt transmission of the fuse output to the charge, said third rotor assembly having its center of gravity initially substantially coincident with the spin axis of the projectile, means responsive to the rotation of said second rotor assembly for offsetting the center of gravity of said third rotor assembly from the spin axis of the projectile, said third rotor assembly being thereby rotatable into a second position in response to rotation of said projectile, said third rotor being formed and cooperating with said first and second rotor assemblies in their second positions to enable transmission of the fuse output to the charge when in said second position.
Claim 11
Dependent Claim
44 words
Apparatus according to claim 9 including means for normally disabling said second and third rotor assemblies from rotation, said disabling means being sequentially responsive to rotation of said first and second rotor assemblies to enable said second and third rotor assemblies for rotation respectively.
Claim 12
Dependent Claim
236 words
Apparatus according to claim 9 wherein said first rotor assembly includes a rotor carrying a pin and a cam, said second rotor assembly including a rotor having a shoulder and a cam follower, means for disabling said first rotor assembly from rotation when said first rotor lies in said initial position, said cam and cam follower being initially engageable with one another for disabling said second rotor from rotation, said first rotor disabling means being responsive to a predetermined spin velocity of the projectile to enable said first rotor for rotation, said cam and cam follower being disengageable one from the other to enable rotation of said second rotor in response to rotation of said first rotor, said pin being engageable with said shoulder in response to rotation of said first rotor to drive second rotor, said third rotor assembly including a rotor having an inset portion along its periphery and a shoulder, said second rotor including a peripheral portion initially engageable with said inset portion carried by said third rotor for disabling said third rotor from rotation, said disabling portions of said second and third rotors being disengageable one from the other to enable rotation of said third rotor in response to rotation of said third rotor, said second rotor including a pin, said second pin being engageable with said third shoulder in response to rotation of said second rotor to drive said third rotor.
Claim 13
Dependent Claim
98 words
Apparatus according to claim 11 wherein each of said rotors have portions initially overlying one another and the charge to initially interrupt transmission of the fuse output to the charge, Said first and second rotors having cutout portions, said cutout portions being in alignment one with the other when said first and second rotors lie in said second position, said third rotor including a sleeve rotatable therewith, said sleeve being disposed within the cutout portions of said first and second rotors when said third rotor is in said second position to transmit the fuse output to the charge.
References Cited (Backward Citations)
US2479851A
Cited
US2718850A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |