US4095527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Specialized detonator firing circuit
Assignee: United States Department of the Navy
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Filing: 1964-09-15
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Granted: 1978-06-20
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Expires: 1984-09-15
Abstract
Abstract 1. A condition responsive electronic firing circuit responsive to a predetermined change in supply voltage comprising:
Inventors
- 👤 Morrison Bert Moore, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:19
CPC Classifications
F; F42; F42C; F42C11/00; F42C11/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
164 words
A condition responsive electronic firing circuit responsive to a predetermined change in supply voltage comprising: a first switch means normally biased for conduction, a second switch means including a controlled rectifier normally biased for non-conduction, wherein the gate electrode is responsively connected to said first switch means whereby a change in the conductive state of said first switch effects a corresponding change in the conductive state of said second switch; a detonator connected between one of the output electrodes of the controlled rectifier and a source of power whereby a detonating current passes therethrough when the rectifier becomes conductive; a bypass capacitor connected between the gate and the other rectifier output electrode for preventing inadvertent actuation of the rectifier by spurious signals; a zener diode interconnecting said first switch means and a source of power; a storage means connected across the output electrodes of said controlled rectifier to provide a discharge pulse to said detonator upon the initiation of conduction in said controlled rectifier.
Claim 2
Dependent Claim
164 words
A condition responsive electronic firing circuit responsive to a predetermined change in supply voltage comprising: a first switch means normally biased for conduction, a second switch means including a controlled rectifier normally biased for non-conduction, wherein the gate electrode is responsively connected to said first switch means whereby a change in the conductive state of said first switch effects a corresponding change in the conductive state of said second switch; a detonator connected between one of the output electrodes of the controlled rectifier and a source of power whereby a detonating current passes therethrough when the rectifier becomes conductive; a bypass capacitor connected between the gate and the other rectifier output electrode for preventing inadvertent actuation of the rectifier by spurious signals; a zener diode interconnecting said first switch means and a source of power; a storage means connected across the output electrodes of said controlled rectifier to provide a discharge pulse to said detonator upon the initiation of conduction in said controlled rectifier.
Claim 3
Dependent Claim
64 words
The circuit of claim 1 wherein said first switch means includes a transistor having its output electrode connected to the gate electrode of said controlled rectifier and its control electrode connected to said Zener diode whereby a rise in voltage at said gate electrode proportional to the rise in voltage of the output electrode of said transistor causes said controlled rectifier to become conducting.
Claim 4
Dependent Claim
76 words
The circuit of claim 2 wherein a source of supply voltage and said Zener diode are connected in parallel, said supply voltage being connected between the input and output electrodes of said transistor and said Zener diode being connected between said control and output electrodes whereby said Zener diode enables said transistor to be cut off and thereby turn on said controlled rectifier at a supply voltage level below which is insufficient to fire said detonator.
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) | 1981-06-19 | 1981-12-19 | 1982-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-19 | 1985-12-19 | 1986-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-19 | 1989-12-19 | 1990-06-20 | $7700.00 | Window Closed / Lapsed |