US3742858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sensor-detonator module
Assignee: Zeneca Inc
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Filing: 1971-05-20
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Granted: 1973-07-03
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Expires: 1991-05-20
Abstract
Abstract A sensor-detonator module for sensing a change in motion and electrically firing a detonator in response thereto. The sensor and detonator are sealed within a can. An insulated pin passes through the can to connect to a source of electricity. A capacitor and a diode may be provided to insure the firing of the detonator even though the circuit to the electrical source is broken or shorted.
Inventors
- 👤 D Stonestrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:17
CPC Classifications
B; B60; B60R; B60R21/00; B60R21/01; F; F42; F42C; F42C15/00; F42C15/40; F42C19/00; F42C19/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
103 words
A sensor-detonator module comprising: a. a sealed metal can having a metal pin passing therethrough in sealed insulated relationship therewith; b. an electrically activated detonator inside said can, said detonator having two electrical terminals, one of which is electrically connected to said can; and c. a sensor inside said can for detecting a change in motion and for closing a switch in response thereto, said switch having a first and a second terminal, said first terminal being electrically connected to said pin and said second terminal being electrically connected to the terminal of said detonator which is not electrically connected to said can.
Claim 2
Dependent Claim
103 words
A sensor-detonator module comprising: a. a sealed metal can having a metal pin passing therethrough in sealed insulated relationship therewith; b. an electrically activated detonator inside said can, said detonator having two electrical terminals, one of which is electrically connected to said can; and c. a sensor inside said can for detecting a change in motion and for closing a switch in response thereto, said switch having a first and a second terminal, said first terminal being electrically connected to said pin and said second terminal being electrically connected to the terminal of said detonator which is not electrically connected to said can.
Claim 3
Dependent Claim
18 words
A module according to claim 1 wherein said pin is sealed to said can by a glass seal.
Claim 4
Dependent Claim
20 words
A module according to claim 1 wherein said can has a well for a linear shaped charge adjacent said detonator.
Claim 5
Dependent Claim
13 words
A module according to claim 1 wherein said sensor is an omnidirectional switch.
Claim 6
Dependent Claim
20 words
A module according to claim 1 wherein a capacitor is electrically connected to said can and to said first terminal.
Claim 7
Dependent Claim
21 words
A module according to claim 5 wherein a diode is electrically connected in series between said pin and said first terminal.
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) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |