US3734019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vent and destruct system
Assignee: United States Department of the Navy
•
Filing: 1971-09-29
•
Granted: 1973-05-22
•
Expires: 1991-09-29
Abstract
Abstract A vent and destruct system for balloons and the like which utilizes pyrotechnic strands covered with tubes of braided copper wire to perform the functions of venting and destructing. The braided copper wire covering on the pyrotechnic strands provides a safety means by preventing static electricity from accidentally igniting the pyrotechnic strands when the system is being attached to a balloon or the like. When the system is activated the tubes of braided copper wire are destroyed by the heat produced by the pyrotechnic strands.
Inventors
- 👤 A Rentz
- 👤 L Jackson
- 👤 R Willard
- 👤 V Burklund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:57
CPC Classifications
B; B64; B64B; B64B1/00; B64B1/58; B64B1/64; F; F42; F42D; F42D3/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
143 words
A vent and destruct system for balloons comprising: a. a firing mechanism; b. slow burning fuse means affixed to the firing mechanism in a manner whereby said slow burning fuse means will be ignited by said firing mechanism when the mechanism is fired; c. a venting pyrotechnic strand affixed to the system at a point intermediate between the ends of the slow burning fuse means in a manner whereby it will be ignited as the slow burning fuse means burns by; d. a destruct pyrotechnic strand affixed to the slow burning fuse means at the end of said means most remote from the firing mechanism in a manner whereby it will be ignited by said means as said means finishes burning; and e. tubes of braided copper wire completely covering all exposed parts of said slow burning fuse means and said pyrotechnic strands.
Claim 2
Dependent Claim
143 words
A vent and destruct system for balloons comprising: a. a firing mechanism; b. slow burning fuse means affixed to the firing mechanism in a manner whereby said slow burning fuse means will be ignited by said firing mechanism when the mechanism is fired; c. a venting pyrotechnic strand affixed to the system at a point intermediate between the ends of the slow burning fuse means in a manner whereby it will be ignited as the slow burning fuse means burns by; d. a destruct pyrotechnic strand affixed to the slow burning fuse means at the end of said means most remote from the firing mechanism in a manner whereby it will be ignited by said means as said means finishes burning; and e. tubes of braided copper wire completely covering all exposed parts of said slow burning fuse means and said pyrotechnic strands.
Claim 3
Dependent Claim
70 words
A venT and destruct mechanism according to claim 1 wherein said slow burning fuse means consists of two lengths of slow burning fuse, the second length of which is ignited by the first length as the first finishes burning and wherein the venting pyrotechnic strand is attached to the system in a manner whereby it is ignited at the time when the first length of slow burning fuse finishes burning.
Claim 4
Dependent Claim
50 words
A vent and destruct system according to claim 2 wherein the ends of said second length of slow burning fuse and said venting pyrotechnic strand are affixed in close proximity with the end of said first length of slow burning fuse by means of a crimped on flared copper tube.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |