US3608494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time delay fuse
Assignee: General Electric Co
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Filing: 1969-03-05
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Granted: 1971-09-28
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Expires: 1989-03-05
Abstract
Abstract A time delay fuse has a ball rotor carrying the detonator charge in a bore along the axis of mass symmetry, and normally held safe, out of line by a detent clip. Release of the clip requires both adequate set back force and centrifugal force. Once the rotor has rotated into the armed, in-line disposition, it is interlocked in this disposition.
Inventors
- 👤 Richard T Ziemba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:13
CPC Classifications
F; F42; F42C; F42C15/00; F42C15/18; F42C15/188; F42C15/192; F42C15/196; F42C15/20; F42C15/22
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
314 words
A time delay fuse mechanism having a safed disposition and an armed disposition, for ammunition, comprising: a housing having a longitudinal axis extending fore and aft, and a substantially spherical cavity therein which is symmetrical about said axis; a substantially spherical rotor disposed in said cavity having an axis of mass symmetry and a diametral bore coaxial therewith and adapted to receive a detonating charge therein; a first annular groove formed into the periphery of said rotor perpendicular to a first diameter which is angularly displaced from said axis of mass symmetry and which first diameter, in the safed disposition is coaxial with said housing longitudinal axis, said groove defining a cone having a portion of relatively smaller diameter proximate to the center of said rotor and a portion of relatively larger diameter remote from said center of Said rotor; a second annular groove formed into the wall of said housing cavity perpendicular to said housing longitudinal axis and adjacent to said cone portion of relatively larger diameter; a third annular groove formed into the wall of said housing cavity perpendicular to said housing longitudinal axis, adjacent to said cone portion of relatively smaller diameter, and contiguous to and of smaller diameter than said second annular groove; and an expansible element, normally disposed on and embracing said cone portion of relatively smaller diameter, and extending at least in part into said third annular groove thereby precluding rotation of said rotor in said cavity; said expansible element adapted, upon the application of an adequate setback force, to ride aft along said longitudinal axis from the normal disposition adjacent said third annular groove to an intermediate disposition adjacent said second annular groove, and when in said intermediate disposition, upon the application of an adequate centrifugal force, to expand into said second annular groove to free said rotor for rotation within said cavity into the armed disposition.
Claim 2
Dependent Claim
314 words
A time delay fuse mechanism having a safed disposition and an armed disposition, for ammunition, comprising: a housing having a longitudinal axis extending fore and aft, and a substantially spherical cavity therein which is symmetrical about said axis; a substantially spherical rotor disposed in said cavity having an axis of mass symmetry and a diametral bore coaxial therewith and adapted to receive a detonating charge therein; a first annular groove formed into the periphery of said rotor perpendicular to a first diameter which is angularly displaced from said axis of mass symmetry and which first diameter, in the safed disposition is coaxial with said housing longitudinal axis, said groove defining a cone having a portion of relatively smaller diameter proximate to the center of said rotor and a portion of relatively larger diameter remote from said center of Said rotor; a second annular groove formed into the wall of said housing cavity perpendicular to said housing longitudinal axis and adjacent to said cone portion of relatively larger diameter; a third annular groove formed into the wall of said housing cavity perpendicular to said housing longitudinal axis, adjacent to said cone portion of relatively smaller diameter, and contiguous to and of smaller diameter than said second annular groove; and an expansible element, normally disposed on and embracing said cone portion of relatively smaller diameter, and extending at least in part into said third annular groove thereby precluding rotation of said rotor in said cavity; said expansible element adapted, upon the application of an adequate setback force, to ride aft along said longitudinal axis from the normal disposition adjacent said third annular groove to an intermediate disposition adjacent said second annular groove, and when in said intermediate disposition, upon the application of an adequate centrifugal force, to expand into said second annular groove to free said rotor for rotation within said cavity into the armed disposition.
Claim 3
Dependent Claim
170 words
A time delay fuse mechanism, having a safed disposition and an armed disposition, for ammunition, comprising; a housing having a longitudinal axis extending fore and aft, and a cavity therein which is symmetrical about said axis; a substantially spherical rotor disposed in said cavity having an axis of mass symmetry and a diametral bore coaxial therewith and adapted to receive a detonating charge therein, and a first diameter which is angularly displaced from said axis of mass symmetry; spin releasable interlocking means disposed in part in said rotor and in part in said cavity for normally retaining said rotor with said first diameter coaxial with said longitudinal axis, and adapted, under adequate centrifugal force to release said rotor for rotation in said cavity to the armed disposition with said axis of mass symmetry coaxial with said longitudinal axis; additional interlocking means disposed in part on said rotor and in part on a surface of said cavity for retaining said rotor, upon rotation into said armed disposition, in said armed disposition.
Claim 4
Dependent Claim
170 words
A time delay fuse mechanism, having a safed disposition and an armed disposition, for ammunition, comprising; a housing having a longitudinal axis extending fore and aft, and a cavity therein which is symmetrical about said axis; a substantially spherical rotor disposed in said cavity having an axis of mass symmetry and a diametral bore coaxial therewith and adapted to receive a detonating charge therein, and a first diameter which is angularly displaced from said axis of mass symmetry; spin releasable interlocking means disposed in part in said rotor and in part in said cavity for normally retaining said rotor with said first diameter coaxial with said longitudinal axis, and adapted, under adequate centrifugal force to release said rotor for rotation in said cavity to the armed disposition with said axis of mass symmetry coaxial with said longitudinal axis; additional interlocking means disposed in part on said rotor and in part on a surface of said cavity for retaining said rotor, upon rotation into said armed disposition, in said armed disposition.
Claim 5
Dependent Claim
52 words
A fuse according to claim 2, wherein: said cavity has a forward portion of substantially hemispherical shape, with a chordal flat surface perpendicular to said longitudinal axis; and said rotor has a mating chordal flat surface perpendicular to said axis of mass symmetry; said flat surfaces serving as said additional interlocking means.
Claim 6
Dependent Claim
38 words
A fuse according to claim 1, further including: interlocking means disposed in part on said rotor and in on a surface of said cavity for retaining said rotor, upon rotation into said armed disposition, in said armed disposition.
Claim 7
Dependent Claim
52 words
A fuse according to claim 4, wherein: said cavity has a forward portion of substantially hemispherical shape, with a chordal flat surface perpendicular to said longitudinal axis; and said rotor has a mating chordal flat surface perpendicular to said axis of mass symmetry; said flat surfaces serving as said additional interlocking means.
References Cited (Backward Citations)
US2715873A
Cited
US3397640A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |