US3900786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High voltage pulse generating circuit
Assignee: THOMAS CUSACK Inc A CORP OF MI
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Filing: 1973-12-21
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Granted: 1975-08-19
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Expires: 1993-12-21
Abstract
Abstract A high voltage pulse generating circuit of the capacitor discharge type is disclosed. The circuitry is especially adapted for use with anti-personnel electric shocking devices and/or capacitor discharge ignition systems. The circuit comprises a transistor inverter which supplies an alternating voltage to a voltage doubler which charges a storage capacitor to a relatively high value. The storage capacitor is connected to a discharge circuit including the primary of a voltage transforming means through a thyristor such as a silicon controlled rectifier. Control means for the thristor is provided to turn it on when the voltage across the storage capacitor reaches a predetermined value. Alternatively, the pulses may be synchronized with an associated device and the control means turns on the thyristor in response to actuation of an external switch.
Inventors
- 👤 Richard James Jordan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:25
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/53; H03K3/57; F; F02; F02P; F02P15/00; F02P15/001; F02P15/003; F02P15/10; F02P3/00; F02P3/06; F02P3/08; F02P3/0807; F02P3/0838; F02P3/0876; F02P3/0884; H05; H05C; H05C1/00; H05C1/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
162 words
A high voltage pulse generating circuit comprising an alternating voltage source, a charging circuit including a coupling capacitor, a rectifier and a storage capacitor connected in series across said source, a thyristor including an anode, a cathode and a gate, a discharging circuit including the anode and cathode of the thyristor, and an induction coil connected in series across said storage capacitor, and control means connected with the gate of said thyristor for turning on the thyristor at controlled switching intervals to discharge the storage capacitor through said induction coil, the frequency of said source being high enough in relation to said controlled switching intervals so that there is at least one charging cycle for each switching interval whereby there is at least one discharging cycle during each switching interval, said coupling capacitor being the sole charging path for said storage capacitor whereby the current drawn from said source during the discharge cycle is limited by the impedance of said coupling capacitor.
Claim 2
Dependent Claim
162 words
A high voltage pulse generating circuit comprising an alternating voltage source, a charging circuit including a coupling capacitor, a rectifier and a storage capacitor connected in series across said source, a thyristor including an anode, a cathode and a gate, a discharging circuit including the anode and cathode of the thyristor, and an induction coil connected in series across said storage capacitor, and control means connected with the gate of said thyristor for turning on the thyristor at controlled switching intervals to discharge the storage capacitor through said induction coil, the frequency of said source being high enough in relation to said controlled switching intervals so that there is at least one charging cycle for each switching interval whereby there is at least one discharging cycle during each switching interval, said coupling capacitor being the sole charging path for said storage capacitor whereby the current drawn from said source during the discharge cycle is limited by the impedance of said coupling capacitor.
Claim 3
Dependent Claim
17 words
The invention as defined in claim 1 wherein said alternating voltage source is the pushpull transistor oscillator.
Claim 4
Dependent Claim
42 words
The invention as defined in claim 1 wherein said control means causes discharge of said storage capacitor during each cycle of said oscillator and the half-cycle of said oscillator following initiation of said discharge is of a polarity to quench said thyristor.
Claim 5
Dependent Claim
61 words
The invention as defined in claim 1 wherein said rectifier is a first rectifying diode, a second rectifying diode connected from the junction of the first rectifying diode and the coupling capacitor to one terminal of said storage capacitor and a blocking diode connected between the other terminal of the first rectifying diode and the other terminal of said storage capacitor.
Claim 6
Dependent Claim
15 words
The invention as defined in claim 1 wherein said thyristor is a silicon controlled rectifier.
Claim 7
Dependent Claim
42 words
The invention as defined in claim 1 wherein said control means comprises an impedance element connected between said gate and a point in said discharging circuit which is at an electrical potential different from said cathode when said storage capacitor is charged.
Claim 8
Dependent Claim
18 words
The invention as defined in claim 6 including a voltage threshold device connected in series with said gate.
Claim 9
Dependent Claim
22 words
The invention as dEfined in claim 7 wherein said impedance element is a part of a voltage divider which includes a capacitor.
Claim 10
Dependent Claim
21 words
The invention as defined in claim 6 wherein said control means further comprises a switch connected between the gate and cathode.
Claim 11
Dependent Claim
25 words
The invention as defined in claim 6 wherein said control means further comprises a switch connected in series with said impedance element and said gate.
Claim 12
Dependent Claim
45 words
The invention as defined in claim 1 wherein said frequency is high enough in relation to said control switching intervals so that there are two or more charging cycles for each switching interval, whereby there are two or more discharging cycles during each switching interval.
References Cited (Backward Citations)
US3118103A
Cited
US3259829A
Cited
US3243683A
Cited
US3337787A
Cited
US3349284A
Cited
US3478258A
Cited
US3566150A
Cited
US3541347A
Cited
US3662185A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |