Patent US3834310A successfully refreshed from Google Patents.
US3834310A
Expired / Lapsed
US
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Remote control circuit and apparatus for exploding explosives
Assignee: NOF Corp
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Filing: 1973-06-18
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Granted: 1974-09-10
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Expires: 1993-06-18
Abstract
Abstract A remote control circuit and apparatus for exploding explosives. Electric power generated at a resonance circuit when it is tuned to a control electromagnetic field is used to charge an ignition condenser. Provision is made for a control circuit including a controlled rectifier called a triac. The control circuit is adapted to generate a starting pulse at an instant when the control electromagnetic field is extinguished. The starting pulse serves to make the controlled rectifier conductive and hence discharge the ignition condenser through a detonator, thereby initiating it and exploding blasting explosives used to break rock and other solid material.
Inventors
- 👤 T Ueda
- 👤 Y Ohsumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:14
CPC Classifications
F; F42; F42D; F42D1/00; F42D1/04; F42D1/045; F42D1/05
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
88 words
A remote control circuit for exploding explosives comprising a control circuit comprising a. a circuit including a resonance circuit adapted to be tuned to a control electromagnetic field and an ignition condenser adapted to be charged by an electric power generated at said resonance circuit when tuned to said control electromagnetic field, and b. an ignition circuit including a controlled rectifier for generating a starting pulse at an instant when said control electromagnetic field is extinguished and discharging the electric power of said ignition condenser through a detonator.
Claim 2
Dependent Claim
88 words
A remote control circuit for exploding explosives comprising a control circuit comprising a. a circuit including a resonance circuit adapted to be tuned to a control electromagnetic field and an ignition condenser adapted to be charged by an electric power generated at said resonance circuit when tuned to said control electromagnetic field, and b. an ignition circuit including a controlled rectifier for generating a starting pulse at an instant when said control electromagnetic field is extinguished and discharging the electric power of said ignition condenser through a detonator.
Claim 3
Dependent Claim
109 words
A remote control apparatus for exploding explosives comprising a control circuit comprising a. a circuit including a resonance circuit adapted to be tuned to a control electromagnetic field and an ignition condenser adapted to be charged by electric power generated at said resonance circuit when tuned to said control electromagnetic field, and b. an ignition circuit including a controlled rectifier for generating a starting pulse at an instant when said control electromagnetic field is extinguished and discharging the electric power of said ignition condenser through a detonator, and c. a control device including an oscillator and a loop antenna and adapted to remotely control said circuit for exploding explosives.
Claim 4
Dependent Claim
109 words
A remote control apparatus for exploding explosives comprising a control circuit comprising a. a circuit including a resonance circuit adapted to be tuned to a control electromagnetic field and an ignition condenser adapted to be charged by electric power generated at said resonance circuit when tuned to said control electromagnetic field, and b. an ignition circuit including a controlled rectifier for generating a starting pulse at an instant when said control electromagnetic field is extinguished and discharging the electric power of said ignition condenser through a detonator, and c. a control device including an oscillator and a loop antenna and adapted to remotely control said circuit for exploding explosives.
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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |