US3890900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical safing and arming circuit
Assignee: United States Department of the Army
•
Filing: 1960-10-05
•
Granted: 1975-06-24
•
Expires: 1980-10-05
Abstract
Abstract An electronic safety and arming circuit is disclosed for fuze systems in ordinance missiles. Specifically, the system is designed for inhibiting normal fuze response over a specified time interval during which spurious signals generated within the fuze system might otherwise cause premature function. A capacitance means and a high voltage variable impedance means are connected in series between a plate voltage source and the input of an amplifier for blocking the firing circuit during the activation time of the plate voltage source.
Inventors
- 👤 Jr William I Gould
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:36
CPC Classifications
F; F42; F42C; F42C11/00; F42C11/008; F42C15/00; F42C15/40
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
91 words
A safing and arming circuit for blocking transients in an electronic fuze caused by the rising voltage of a deferred-action battery, comprising: an amplifier having a plate electrode connected to said battery, a control grid, an input terminal, and a resistor connecting said grid to said terminal; and an inhibiting circuit having a capacitor, a gaseous discharge voltage regulator tube, and a current limiting resistor connected serially between said battery and said input terminal for producing an inhibiting voltage at said terminal only during the rise time of said rising voltage.
Claim 2
Dependent Claim
91 words
A safing and arming circuit for blocking transients in an electronic fuze caused by the rising voltage of a deferred-action battery, comprising: an amplifier having a plate electrode connected to said battery, a control grid, an input terminal, and a resistor connecting said grid to said terminal; and an inhibiting circuit having a capacitor, a gaseous discharge voltage regulator tube, and a current limiting resistor connected serially between said battery and said input terminal for producing an inhibiting voltage at said terminal only during the rise time of said rising voltage.
Claim 3
Dependent Claim
100 words
An amplifier comprising in combination: a deferred-action battery having a predetermined activation time, and comprising a positive terminal and a negative terminal; amplifier means comprising a vacuum tube having at least a control grid, a cathode and a plate electrode, an input terminal, a resistor connecting said control grid to said input terminal, and a conductor connecting said positive battery terminal to said plate electrode; and a series circuit including a capacitor and a voltage controlled variable impedance means connected between said positive battery terminal and said input terminal so that the amplifier is inhibited only during said activation time.
Claim 4
Dependent Claim
100 words
An amplifier comprising in combination: a deferred-action battery having a predetermined activation time, and comprising a positive terminal and a negative terminal; amplifier means comprising a vacuum tube having at least a control grid, a cathode and a plate electrode, an input terminal, a resistor connecting said control grid to said input terminal, and a conductor connecting said positive battery terminal to said plate electrode; and a series circuit including a capacitor and a voltage controlled variable impedance means connected between said positive battery terminal and said input terminal so that the amplifier is inhibited only during said activation time.
Claim 5
Dependent Claim
121 words
In a frequency modulated fuze system, an F-M discriminator for producing a target indicating signal in response to a predetermined input signal; an integrating circuit connected to said discriminator; a D-C amplifier having an anode, a cathode, a control grid, an input terminal connected to said integrating circuit, and a resistor connected between said control grid and said input terminal; a deferred-action battery connected to said anode; a thyratron firing circuit coupled to said anode; a detonator connected to said firing circuit; and inhibiting means for preventing actuation of said detonator only during the activation time of said battery, said means comprising a capacitor and a gaseous voltage regulator tube connected in series between said amplifier input terminal and said battery.
Claim 6
Dependent Claim
121 words
In a frequency modulated fuze system, an F-M discriminator for producing a target indicating signal in response to a predetermined input signal; an integrating circuit connected to said discriminator; a D-C amplifier having an anode, a cathode, a control grid, an input terminal connected to said integrating circuit, and a resistor connected between said control grid and said input terminal; a deferred-action battery connected to said anode; a thyratron firing circuit coupled to said anode; a detonator connected to said firing circuit; and inhibiting means for preventing actuation of said detonator only during the activation time of said battery, said means comprising a capacitor and a gaseous voltage regulator tube connected in series between said amplifier input terminal and said battery.
Claim 7
Dependent Claim
80 words
In an amplifier having at least a control element, an input terminal, an output terminal, a power supply, and a resistor connecting said input terminal to said control element, improved means for inhibiting said amplifier during power supply voltage transients, said means comprising: a capacitor, a gaseous discharge device, and a first resistor connected in series between said power supply and said input terminal, and a second resistor connected between the junction of said capacitor and said device and ground.
Claim 8
Dependent Claim
80 words
In an amplifier having at least a control element, an input terminal, an output terminal, a power supply, and a resistor connecting said input terminal to said control element, improved means for inhibiting said amplifier during power supply voltage transients, said means comprising: a capacitor, a gaseous discharge device, and a first resistor connected in series between said power supply and said input terminal, and a second resistor connected between the junction of said capacitor and said device and ground.
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) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |