US3862602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contact delay and self-destruct circuit
Assignee: United States Department of the Navy
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Filing: 1970-05-14
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Granted: 1975-01-28
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Expires: 1990-05-14
Abstract
Abstract A circuit for providing a predetermined time delay after missile impact before detonation, and a self-destruct system controlled by the missile''s operation. The circuit utilizes a quad inverter fed by the self-destruct system and the contact delay system, in parallel, driving a firing system. The contact delay system is basically a one-shot multivibrator, utilizing pulses from piezoelectric crystals as inputs, and having an RC timing circuit to trigger the firing system. The self-destruct system utilizes a reduced voltage resulting from an extinquished gas generator to trigger the firing system. The firing system has an SCR gate triggered by the quad inverter output.
Inventors
- 👤 Larry G Manning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:28
CPC Classifications
F; F42; F42C; F42C11/00; F42C11/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
126 words
A fuze system for use in a projectile, comprising; first electrical means for providing a time delay after a first predetermined event before an electrical signal is provided as an output, wherein said first predetermined event is the projectile''s contact with a target, including an input from a source responsive to said contact, a quad inverter coupled to the input and providing a time delayed output after the contact, and a time delay circuit coupled to said quad inverter for delaying the output of said quad inverter; second electrical means for providing a time delay after a second predetermined event before an electrical signal is provided as an output; and means for providing said electrical signal output after either said first or said second predetermined event.
Claim 2
Dependent Claim
126 words
A fuze system for use in a projectile, comprising; first electrical means for providing a time delay after a first predetermined event before an electrical signal is provided as an output, wherein said first predetermined event is the projectile''s contact with a target, including an input from a source responsive to said contact, a quad inverter coupled to the input and providing a time delayed output after the contact, and a time delay circuit coupled to said quad inverter for delaying the output of said quad inverter; second electrical means for providing a time delay after a second predetermined event before an electrical signal is provided as an output; and means for providing said electrical signal output after either said first or said second predetermined event.
Claim 3
Dependent Claim
31 words
The system of claim 1 wherein said second electrical means is a means for detonating an explosive charge in said projectile at some time after said projectile''s flight has been initiated.
Claim 4
Dependent Claim
16 words
The system of claim 1 wherein said time delay circuit comprises; a resistor and a capacitor.
Claim 5
Dependent Claim
86 words
The system of claim 1 wherein said first electrical means further includes; a crystal, which provides an electric pulse when impulse stressed such as by impact, electrically connected to a one-shot multivibrator; a one-shot multivibrator connectEd to said crystal for providing an electric signal to said electrical signal output providing means including said quad inverter; and wherein said electrical signal output providing means includes; a firing circuit electrically connected to said multivibrator and triggerable by said multivibrator for providing an electric signal to said explosive charge.
Claim 6
Dependent Claim
77 words
The system of claim 1 wherein said second electrical means includes; an electric generator, means for reducing the voltage output of said generator, control means for providing an electric signal to said electrical signal output providing means when said generator voltage output is reduced; and wherein said electrical signal output providing means includes; a firing circuit electrically connected to said control means and triggerable by said control means for providing an electric signal to said explosive charge.
Claim 7
Dependent Claim
43 words
The system of claim 1 wherein said electrical signal output providing means includes a firing circuit electrically connected to said quad inverter and triggerable by said quad inverter and electrically connected to said second electrical means and triggerable by said second electrical means.
Claim 8
Dependent Claim
69 words
The system of claim 1 wherein said quad inverter includes first, second, third, and fourth transistors and the base of said first transistor is effectively coupled to said input, the output terminal of said third transistor is coupled to the base of said second transistor, and the output terminals of said first and second transistors and the base of said third transistor are coupled to said time delay circuit.
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) | 1978-01-27 | 1978-07-29 | 1979-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-27 | 1982-07-29 | 1983-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-27 | 1986-07-29 | 1987-01-28 | $7700.00 | Window Closed / Lapsed |