Patent US4080585A successfully refreshed from Google Patents.
US4080585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flat coil transformer for electronic circuit boards
Assignee: Cubic Corp
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Filing: 1977-04-11
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Granted: 1978-03-21
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Expires: 1997-04-11
Abstract
Abstract A flat coil transformer on an electronic circuit board. The primary winding consists of a first helical conductive pattern formed by alternately spaced straps of a first series of conductive straps on one surface of the circuit board, alternately spaced straps of a second series of straps on the opposite surface of the circuit board, and alternately spaced holes of first and second generally parallel series of conductive coated holes extending through the board and connecting together the alternately spaced straps of the first and second series of straps. The secondary winding consists of a second helical conductive pattern formed by the remaining alternately spaced straps of the first series of straps, the remaining alternately spaced straps of the second series of straps, and the remaining alternately spaced holes of the first and second series of holes connecting together the remaining alternately spaced straps of the first and second series of straps. The first and second helical patterns each have a longitudinal axis that is generally parallel to the first and second series of holes; and the holes in the first helical pattern are staggered laterally in relation to the holes in the second helical pattern.
Inventors
- 👤 Edward Henry Molthen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:42
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/16; H05K1/165; H01; H01F; H01F27/00; H01F27/28; H01F27/2804; H01F17/00; H01F17/0006; H01F2017/004; H05K2201/00; H05K2201/09; H05K2201/09209; H05K2201/09654; H05K2201/097
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
321 words
A flat coil transformer for electronic circuit boards comprising: a circuit board having first and second spaced, generally flat electrically insulative opposed surfaces, and having at least a first and a second series of holes extending along said surfaces and extending through said board, wherein said first series of holes is generally parallel to said second series of holes; a first conductive pattern on said first surface of said board and comprising a first series of straps extending between the said first and second series of holes; and a second conductive pattern on said second surface of said board and comprising a second series of straps extending between said first and second series of holes; wherein at least a portion of the walls of said holes are coated with a conductive layer to complete an electrical circuit through said straps and holes forming at least one generally helical conductive pattern; a primary winding consisting of a first said helical conductive pattern comprising alternately spaced straps of said first series of straps, alternately spaced straps of said second series of straps, and alternately spaced conductively coated holes of said first and second series of holes connecting together said alternately spaced straps of said first and second series of straps; and a secondary winding consisting of a second said helical conductive pattern comprising the remaining alternately spaced straps of said first series of straps, the remaining alternately spaced straps of said second series of straps, and the remaining alternately spaced conductively coated holes of said first and second series of holes connecting together the remaining alternately spaced straps of the said first and second series of straps; wherein said first and second helical patterns each have a longitudinal axis that is generally parallel to said first and second series of holes; characterized by said holes in said first helical pattern being staggered laterally in relation to said holes in said second helical pattern.
Claim 2
Dependent Claim
321 words
A flat coil transformer for electronic circuit boards comprising: a circuit board having first and second spaced, generally flat electrically insulative opposed surfaces, and having at least a first and a second series of holes extending along said surfaces and extending through said board, wherein said first series of holes is generally parallel to said second series of holes; a first conductive pattern on said first surface of said board and comprising a first series of straps extending between the said first and second series of holes; and a second conductive pattern on said second surface of said board and comprising a second series of straps extending between said first and second series of holes; wherein at least a portion of the walls of said holes are coated with a conductive layer to complete an electrical circuit through said straps and holes forming at least one generally helical conductive pattern; a primary winding consisting of a first said helical conductive pattern comprising alternately spaced straps of said first series of straps, alternately spaced straps of said second series of straps, and alternately spaced conductively coated holes of said first and second series of holes connecting together said alternately spaced straps of said first and second series of straps; and a secondary winding consisting of a second said helical conductive pattern comprising the remaining alternately spaced straps of said first series of straps, the remaining alternately spaced straps of said second series of straps, and the remaining alternately spaced conductively coated holes of said first and second series of holes connecting together the remaining alternately spaced straps of the said first and second series of straps; wherein said first and second helical patterns each have a longitudinal axis that is generally parallel to said first and second series of holes; characterized by said holes in said first helical pattern being staggered laterally in relation to said holes in said second helical pattern.
Claim 3
Dependent Claim
22 words
A transformer according to claim 1, wherein said longitudinal axes of said first and second helical patterns are separated from one another.
Claim 4
Dependent Claim
56 words
A transformer according to claim 2, wherein the helical conductive pattern of one of the windings further comprises consecutively spaced straps of said first series of straps, consecutively spaced straps of said second series of straps, and consecutively spaced holes of said first and second series of holes extending beyond the alternately spaced straps and holes.
Claim 5
Dependent Claim
56 words
A transformer according to claim 1, wherein the helical conductive pattern of one of the windings further comprises consecutively spaced straps of said first series of straps, consecutively spaced straps of said second series of straps, and consecutively spaced holes of said first and second series of holes extending beyond the alternately spaced straps and 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) | 1981-03-20 | 1981-09-19 | 1982-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-20 | 1985-09-19 | 1986-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-20 | 1989-09-19 | 1990-03-21 | $7700.00 | Window Closed / Lapsed |