US4149466A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Explosive device
Assignee: Banyaszati Kutato Intezet
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Filing: 1977-03-31
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Granted: 1979-04-17
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Expires: 1997-03-31
Abstract
Abstract An explosive device comprises an explosive charge and an initiator, the initiator having a discharge lamp optically coupled with said explosive charge and connected to a voltage source via a first switch. According to the invention said discharge lamp has a series resistor shunted via a second switch which is open before and closed when the explosive charge is initiated. The glow discharge evoked through said series resistor cannot initiate the explosive charge, but it shortens the time delay of the avalanche discharge and makes it independent of the stochastic natural ionization.
Inventors
- 👤 Lajos Fojt
- 👤 Jozsef Kirschner
- 👤 Laszlo Nemeth
- 👤 Janos Thesz
- 👤 Peter Tuti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:27
CPC Classifications
F; F42; F42C; F42C19/00; F42C19/08; F42C19/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
58 words
An explosive device having an explosive charge and an initiator, the initiator comprising a discharge lamp optically coupled with said explosive charge and connected to a voltage source via a first switching means, said discharge lamp having a series resistor shunted via a second switching means which is open before and closed when the explosive charge is initiated.
Claim 2
Dependent Claim
58 words
An explosive device having an explosive charge and an initiator, the initiator comprising a discharge lamp optically coupled with said explosive charge and connected to a voltage source via a first switching means, said discharge lamp having a series resistor shunted via a second switching means which is open before and closed when the explosive charge is initiated.
Claim 3
Dependent Claim
17 words
The explosive device according to claim 1, wherein at least two discharge lamps are connected in series.
Claim 4
Dependent Claim
25 words
The explosive device according to claim 2, wherein the discharge lamps are identical, each being shunted by a resistor, all resistors being of equal value.
Claim 5
Dependent Claim
15 words
The explosive device according to claim 1, and an indicator series-connected with the discharge lamp.
Claim 6
Dependent Claim
16 words
The explosive device according to claim 1, and a radioactive isotope disposed in the discharge lamp.
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) | 1982-04-16 | 1982-10-16 | 1983-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-16 | 1986-10-16 | 1987-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-16 | 1990-10-16 | 1991-04-17 | $7700.00 | Window Closed / Lapsed |