US3562639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for testing exploding bridgewire ordnance devices
Assignee: United States Department of the Army
•
Filing: 1969-01-09
•
Granted: 1971-02-09
•
Expires: 1989-01-09
Abstract
Abstract A device and method wherein a first potential is applied to an exploding bridgewire unit (EBW), including a spark gap, to determine if the EBW is shorted. If the EBW is shorted, a lamp will be lighted. If the lamp is not lighted a second potential may be applied to the EBW to check continuity of the bridgewire of the EBW. The second potential is high enough to cause the spark gap of the EBW to break down and conduct if continuity of the bridgewire exists. If the lamp does not light the EBW is defective. Current through the EBW is limited to render the possibility of damage to or explosion of the EBW negligible.
Inventors
- 👤 James B Wright
- 👤 James D Holder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:41
CPC Classifications
F; F42; F42B; F42B35/00; G; G01; G01R; G01R31/00; G01R31/50
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
178 words
Apparatus for testing the spark gap of an exploding bridgewire ordnance device for shorts and testing the series connection of the spark gap and bridgewire of an exploding bridgewire ordnance device for continuity comprising: a first and second output terminal; a DC voltage source having a first and second output terminal; a first and second lamp; a first and second resistor connected in series between said first and second output terminal of said voltage source; at a third and fourth resistor; means connecting said third resistor between said first output terminal of said voltage source and said first output terminal of said test unit; said means further connecting said fourth resistor from between said first and second resistors and said first output terminal of said test unit; said first lamp being connected in parallel with said third resistor; said second lamp being connected in parallel with said fourth resistor; said second output terminals being connected together; and said exploding bridgewire ordnance device being adapted to be connected between said first and second output terminals of said test unit.
Claim 2
Dependent Claim
178 words
Apparatus for testing the spark gap of an exploding bridgewire ordnance device for shorts and testing the series connection of the spark gap and bridgewire of an exploding bridgewire ordnance device for continuity comprising: a first and second output terminal; a DC voltage source having a first and second output terminal; a first and second lamp; a first and second resistor connected in series between said first and second output terminal of said voltage source; at a third and fourth resistor; means connecting said third resistor between said first output terminal of said voltage source and said first output terminal of said test unit; said means further connecting said fourth resistor from between said first and second resistors and said first output terminal of said test unit; said first lamp being connected in parallel with said third resistor; said second lamp being connected in parallel with said fourth resistor; said second output terminals being connected together; and said exploding bridgewire ordnance device being adapted to be connected between said first and second output terminals of said test unit.
Claim 3
Dependent Claim
75 words
Apparatus as set forth in claim 1 wherein said means connecting comprises a switch having a normally open pole and normally closed pole, said normally open pole being connected between said output terminal of said voltage source and said parallel connection of said first lamp and said third resistor; and said normally closed pole being connected from between said first and second resistor and said parallel combination of said second lamp and said fourth resistor.
References Cited (Backward Citations)
US2036084A
Cited
US2862179A
Cited
US3015790A
Cited
US2917705A
Cited
US3135913A
Cited
US3217244A
Cited
US3277364A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |