US3923359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-layer printed-circuit boards
Assignee: PRESSEY HANDEL und INVESTMENTS
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Filing: 1972-07-10
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Granted: 1975-12-02
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Expires: 1992-07-10
Abstract
Abstract Replacement of individual connections arranged between terminal contacts of a multi-layer printed-circuit board by conductors arranged inaccessibly between the sheets from which the board is fabricated, is made possible by providing, laterally of the bushed bores which provide access to these internal conductors, separate bushed terminal bores whose bushes are respectively connected to the bushes of the former by readily cut connector elements at the upper surface of the uppermost sheet of the board.
Inventors
- 👤 William Newsam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:12
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/0296; H05K1/0298; H05K1/0286; H05K1/0287; H05K1/0292; H05K2201/00; H05K2201/04; H05K2201/044; H05K2201/09; H05K2201/09209; H05K2201/095; H05K2201/09609; H05K2201/10; H05K2201/10613; H05K2201/10621; H05K2201/10689; H05K2203/00; H05K2203/17; H05K2203/175; H05K3/00; H05K3/46; H05K3/4611
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
210 words
In a multi-layer printed circuit board of the type including bonded stacks of substrates of insulating material having a printed conductor patterned or layered surface improved means for conductively connecting one or more printed conductor elements located in said board, and for directly connecting a terminal member of an external device to said board comprising, a first plurality of plated-through holes spacially located over the surface of said board and extending fully through it, each printed conductor element located in said board being conductively connected to at least two plated-through holes of said first plurality, a second plurality of plated-through holes spatially located over the surface of said board and extending fully through it, each plated-through hole of said second plurality comprising a female socket for a male terminal member of a device external to said board, and a plurality of discrete, severable linking tracks, which are equal in number to the number of plated-through holes in each said plurality each plated-through hole of said first plurality being connected to a selected plated-through hole of said second plurality by one of said linking tracks, each of said linking tracks comprising a printed conductor element, which has a straight path which is located on said surface of said printed circuit board.
Claim 2
Dependent Claim
210 words
In a multi-layer printed circuit board of the type including bonded stacks of substrates of insulating material having a printed conductor patterned or layered surface improved means for conductively connecting one or more printed conductor elements located in said board, and for directly connecting a terminal member of an external device to said board comprising, a first plurality of plated-through holes spacially located over the surface of said board and extending fully through it, each printed conductor element located in said board being conductively connected to at least two plated-through holes of said first plurality, a second plurality of plated-through holes spatially located over the surface of said board and extending fully through it, each plated-through hole of said second plurality comprising a female socket for a male terminal member of a device external to said board, and a plurality of discrete, severable linking tracks, which are equal in number to the number of plated-through holes in each said plurality each plated-through hole of said first plurality being connected to a selected plated-through hole of said second plurality by one of said linking tracks, each of said linking tracks comprising a printed conductor element, which has a straight path which is located on said surface of said printed circuit board.
Claim 3
Dependent Claim
162 words
A back-plane for a plurality of plug-in functional units comprising, in combination, a multi-layer printed circuit board having plated-through holes and at least one plug-in functional unit provided with socket connectors mounted on a surface of said printed circuit board, each member of a first plurality of said plated-though holes being connected to at least one printed conductor element, each of said at least one printed conductor elements directly extending within said printed circuit board to another plated-through hole of said first plurality, each member of a second plurality of said plated-through holes comprising a female socket, a terminal tag of a said socket connector being housed therein and operatively connected thereto, each platedthrough hole of said second plurality being connected to an adjacent plated-through hole of said first plurality only by a severable linking track, having a straight path comprising a printed conductor element located on that surface of said printed circuit board from which respective ends of terminal tags protrude.
Claim 4
Dependent Claim
162 words
A back-plane for a plurality of plug-in functional units comprising, in combination, a multi-layer printed circuit board having plated-through holes and at least one plug-in functional unit provided with socket connectors mounted on a surface of said printed circuit board, each member of a first plurality of said plated-though holes being connected to at least one printed conductor element, each of said at least one printed conductor elements directly extending within said printed circuit board to another plated-through hole of said first plurality, each member of a second plurality of said plated-through holes comprising a female socket, a terminal tag of a said socket connector being housed therein and operatively connected thereto, each platedthrough hole of said second plurality being connected to an adjacent plated-through hole of said first plurality only by a severable linking track, having a straight path comprising a printed conductor element located on that surface of said printed circuit board from which respective ends of terminal tags protrude.
Claim 5
Dependent Claim
64 words
The back-plane as claimed in claim 2, said plated-through holes being arranged in a substantially rectangular grid pattern on said board, members of said second plurality of plated-through holes being arranged in pairs of parallel contiguous rows thereon, a pair of rows thereof, being spaced from each other by a corresPonding parallel pair of rows of members of said first plurality of plated-through holes.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |