US3710197A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power interlock for electronic circuit cards
Assignee: Westinghouse Electric Corp
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Filing: 1971-02-11
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Granted: 1973-01-09
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Expires: 1991-02-11
Abstract
Abstract An electronic circuit card having a plurality of aligned terminals which are engageable with corresponding terminals in a terminal block. The construction of a particular terminal on the card is such that it is the last terminal on the card to make contact with a terminal in the terminal block when the card is inserted into the block. This particular terminal on the card is electrically connected to another terminal on the card. The card and the terminal block are constructed such that power to the circuit components on the card can be supplied only through these two terminals when the card is fully inserted into the block. This arrangement prevents power from being applied to the components on the card until all the terminals on the card are properly engaged with the terminals in the terminal block. Similarily, when the card is removed from the block the power circuit is the first to be disconnected.
Inventors
- 👤 R Olds
- 👤 E Bonzack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:59
CPC Classifications
H; H01; H01R; H01R12/00; H01R12/70; H01R12/71; H01R12/72; H01R12/721; H01R13/00; H01R13/64; H01R13/66; H01R13/70; H01R13/703
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
187 words
In combination a terminal block having a plurality of aligned electrical terminals and an electronic circuit card comprising a generally planar board having forward and rear portions, a plurality of electronic components on said board and a plurality of aligned electrical terminals on said board engageable with the terminal in the terminal block, said terminals in the terminal block including a first terminal electrically connected to a power supply and second and third terminals electrically connected together, said terminals on said card including a first terminal engageable with one of said first two mentioned terminals in said terminal block and a second terminal engageable with the other of said first two mentioned terminals in the terminal block and a third terminal on said card engageable with the third terminal in said block for conducting electric current from said power supply to the circuitry on said card, said first terminal on said board having its rearmost portion spaced forwardly of the rearmost portion of said second terminal on said board and means on said board forming a conductive path between said first and second terminals on said board.
Claim 2
Dependent Claim
187 words
In combination a terminal block having a plurality of aligned electrical terminals and an electronic circuit card comprising a generally planar board having forward and rear portions, a plurality of electronic components on said board and a plurality of aligned electrical terminals on said board engageable with the terminal in the terminal block, said terminals in the terminal block including a first terminal electrically connected to a power supply and second and third terminals electrically connected together, said terminals on said card including a first terminal engageable with one of said first two mentioned terminals in said terminal block and a second terminal engageable with the other of said first two mentioned terminals in the terminal block and a third terminal on said card engageable with the third terminal in said block for conducting electric current from said power supply to the circuitry on said card, said first terminal on said board having its rearmost portion spaced forwardly of the rearmost portion of said second terminal on said board and means on said board forming a conductive path between said first and second terminals on said board.
Claim 3
Dependent Claim
40 words
The combination of claim 1 further including means on said terminal block and said card for guiding said terminals on said card into engagement with said terminals in said terminal block as said card is inserted into said terminal block.
Claim 4
Dependent Claim
25 words
The combination of claim 1 wherein said first and second terminals on said board comprise generally flat conductive paths on the surface of said board.
Claim 5
Dependent Claim
10 words
The combination of claim 3 wherein said paths are parallel.
Claim 6
Dependent Claim
37 words
The combination of claim 4 wherein said means forming a conductive path between said first and second terminals comprises a flat conductive path on said board extending transversely between said first and second terminals on said board.
References Cited (Backward Citations)
US2760127A
Cited
US2965811A
Cited
US3024436A
Cited
US2928063A
Cited
US3008245A
Cited
US3278714A
Cited
US3433888A
Cited
US3437977A
Cited
US3492538A
Cited
US3491267A
Cited
US3533045A
Cited
US3485934A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |