US3745276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit breaking device
Assignee: STURDOBE Corp A CORP OF DE
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Filing: 1972-03-01
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Granted: 1973-07-10
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Expires: 1992-03-01
Abstract
Abstract A device for breaking a circuit which comprises an anvil and a cutter cooperating with the anvil and a printed circuit board between the anvil and cutter, the circuit to be broken comprising conductors in each of the cutter and anvil and a connection between those conductors through the printed circuit board. Actuation of the device, for example by an explosive cartridge, causes the cutter to move toward the anvil and break a piece from the printed circuit board and at the same time to break the connection between the conductors of the anvil and cutter.
Inventors
- 👤 J Mcpherson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:17
CPC Classifications
H; H01; H01H; H01H39/00; H01H39/006
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
105 words
A circuit breaking device comprising an anvil, a cutter having a cutting edge for cooperation with the anvil, a printed circuit board disposed between the anvil and the cutter, a conductor in the anvil and a conductor in the cutter, said conductors being connected to a common conducting path of the printed circuit board, said path crossing said cutting edge and said cutters being connected to the path at opposite sides of said edge and actuating means for forcing the cutter towards said anvil to cut a portion from the printed circuit board whereby said path is broken between the connections of said conductors thereto.
Claim 2
Dependent Claim
105 words
A circuit breaking device comprising an anvil, a cutter having a cutting edge for cooperation with the anvil, a printed circuit board disposed between the anvil and the cutter, a conductor in the anvil and a conductor in the cutter, said conductors being connected to a common conducting path of the printed circuit board, said path crossing said cutting edge and said cutters being connected to the path at opposite sides of said edge and actuating means for forcing the cutter towards said anvil to cut a portion from the printed circuit board whereby said path is broken between the connections of said conductors thereto.
Claim 3
Dependent Claim
47 words
A device as claimed in claim 1 wherein one of said cutter and said anvil has a female configuration and the other of said cutter and anvil has a cooperating male configuration the edges of said configurations cooperating to cut said portion from the printed circuit board.
Claim 4
Dependent Claim
20 words
A device as claimed in claim 2 wherein the cutter has a male configuration and the anvil a female configuration.
Claim 5
Dependent Claim
15 words
A device as claimed in claim 3 wherein said actuating means comprises an explosive charge.
Claim 6
Dependent Claim
15 words
A device as claimed in claim 2 wherein said actuating means comprises an explosive charge.
Claim 7
Dependent Claim
15 words
A device as claimed in claim 1 wherein said actuating means comprises an explosive charge.
Claim 8
Dependent Claim
20 words
A device as claimed in claim 6 wherein said conductors are connected to a detonating circuit for said explosive charge.
Claim 9
Dependent Claim
20 words
A device as claimed in claim 1 wherein said conductors are connected to a circuit for activating said actuating means.
Claim 10
Dependent Claim
183 words
A circuit breaking device comprising a housing, an explosive charge within said housing a cutter mounted for sliding movement in said housing upon detonation of said charge, a cylindrical projection on that side of the cutter opposite to said charge and defining an annular cutting edge, an anvil having a recess opposite to the projection to the cutter for the reception of said projection upon detonation of said charge, a printed circuit board disposed between the anvil and cutter and extending over the recess of the anvil, at least one conductor disposed in the anvil, at least one conductor in the cutter, said conductors being electrically connected to a conducting path on the printed circuit board, said path extending across said cutting edge whereby upon detonation of said charge said cutter is forced so that the projection thereon is moved into the recess of said anvil and a portion of said printed circuit board is separated from the remainder whereby said conducting path is broken and the connection between the said conductors is interrupted, said cutter and anvil being of high dielectric material.
Claim 11
Dependent Claim
183 words
A circuit breaking device comprising a housing, an explosive charge within said housing a cutter mounted for sliding movement in said housing upon detonation of said charge, a cylindrical projection on that side of the cutter opposite to said charge and defining an annular cutting edge, an anvil having a recess opposite to the projection to the cutter for the reception of said projection upon detonation of said charge, a printed circuit board disposed between the anvil and cutter and extending over the recess of the anvil, at least one conductor disposed in the anvil, at least one conductor in the cutter, said conductors being electrically connected to a conducting path on the printed circuit board, said path extending across said cutting edge whereby upon detonation of said charge said cutter is forced so that the projection thereon is moved into the recess of said anvil and a portion of said printed circuit board is separated from the remainder whereby said conducting path is broken and the connection between the said conductors is interrupted, said cutter and anvil being of high dielectric material.
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) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |