US4939623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modem with improved transformer assembly
Assignee: Motorola Solutions Inc
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Filing: 1989-04-25
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Granted: 1990-07-03
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Expires: 2009-04-25
Abstract
Abstract An improved transformer assembly includes a core windings about the core, and a mechanism attached to opposing ends of the core for slideably mounting the assembly to interior edges of a printed circuit board (pcb) which define a recess in the pcb. A further mechanism permits making direct electrical connection between conductors on the printed circuit board and the transformer windings. No additional fasteners or additional soldering is required. This transformer assembly is especially suited for utilization in a modem in order to reduce the thickness of its housing.
Inventors
- 👤 John E. Equi
- 👤 Lelton C. Woodham
- 👤 John M. Butler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:47
CPC Classifications
H; H01; H01R; H01R31/00; H01R31/06; H01R31/065; H01F; H01F27/00; H01F27/02; H01F27/027; H01R13/00; H01R13/66; H01R13/665; H01R13/6675; H05; H05K; H05K7/00; H05K7/14; H05K7/1417; H05K1/00; H05K1/18; H05K1/182
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
70 words
A transformer assembly mounted to a printed circuit board (pcb) having a U-shaped slot extending inward from a perimeter edge comprising: a core; primary and secondary windings fixed to said core, said core and windings forming a core assembly; means attached to opposing ends of said core assembly releasably mounting said core assembly to said pcb, said mounting means slidingly engaging opposing edges of the U-shaped slot on said pcb.
Claim 2
Dependent Claim
70 words
A transformer assembly mounted to a printed circuit board (pcb) having a U-shaped slot extending inward from a perimeter edge comprising: a core; primary and secondary windings fixed to said core, said core and windings forming a core assembly; means attached to opposing ends of said core assembly releasably mounting said core assembly to said pcb, said mounting means slidingly engaging opposing edges of the U-shaped slot on said pcb.
Claim 3
Dependent Claim
27 words
The transformer assembly and printed circuit board according to claim 1 wherein said mounting means engage's two opposing interior edges of the U-shaped slot on the pcb.
Claim 4
Dependent Claim
23 words
The transformer assembly and printed circuit board according to claim 2 wherein said mounting means comprises flanges extending outwardly beyond said core assembly.
Claim 5
Dependent Claim
25 words
The transformer assembly and printed circuit board according to claim 3 wherein said flanges have a slot dimensioned to recieve said edges of the pcb.
Claim 6
Dependent Claim
35 words
The transformer assembly and printed circuit board according to claim 1 wherein said mounting means mounts said core assembly so that a substantial portion of said assembly projects beyond both major surfaces of said pcb.
Claim 7
Dependent Claim
53 words
The transformer assembly and printed circuit board according to claim 1 further comprising electrical connection means attached to said core assembly slidingly engaging the edge of the pcb that defines the base of the U-shaped slot to establish electrical connection between said windings and pcb conductors adjacent the base of the U-shaped slot.
Claim 8
Dependent Claim
34 words
The transformer assembly and printed circuit board according to claim 6 wherein said engaging means comprises spaced apart resilient contacts slidingly engaging the edge of the pcb defining the base of the U-shaped slot.
Claim 9
Dependent Claim
40 words
The transformer assembly and printed circuit board according to claim 1 further comprising means attached to said core assembly for making direct electrical connection with an AC electrical outlet thereby permitting AC power to be coupled to said primary winding.
Claim 10
Dependent Claim
98 words
A data communications device comprising: a housing; electrical circuitry disposed on a printed circuit board (pcb) for transmitting and receiving data mounted within said housing, said pcb having a U-shaped slot extending inward from a perimeter edge; transformer assembly mounted to said pcb, said assembly comprising: a core; primary and secondary windings fixed to said core, said core and windings forming a core assembly; means attached to opposing ends of said core assembly for releasably mounting said core assembly to said pcb, said mounting means disposed to slidingly engage opposing edges of said U-shaped slot in the pcb.
Claim 11
Dependent Claim
98 words
A data communications device comprising: a housing; electrical circuitry disposed on a printed circuit board (pcb) for transmitting and receiving data mounted within said housing, said pcb having a U-shaped slot extending inward from a perimeter edge; transformer assembly mounted to said pcb, said assembly comprising: a core; primary and secondary windings fixed to said core, said core and windings forming a core assembly; means attached to opposing ends of said core assembly for releasably mounting said core assembly to said pcb, said mounting means disposed to slidingly engage opposing edges of said U-shaped slot in the pcb.
Claim 12
Dependent Claim
20 words
The device according to claim 9 wherein said mounting means is dimensioned to engage said opposing edges of the pcb.
Claim 13
Dependent Claim
26 words
The device according to claim 11 wherein said mounting means at each opposing end of the core assembly engages said two opposing edges of the pcb.
Claim 14
Dependent Claim
18 words
The device according to claim 10 wherein said mounting means comprises flanges extending outwardly beyond said core assembly.
Claim 15
Dependent Claim
21 words
The device according to claim 12 wherein said flanges have a slot dimensioned to receive said opposing edges of the pcb.
Claim 16
Dependent Claim
31 words
The device according to claim 9 wherein said mounting means mounts said core assembly so that a substantial portion of said core assembly projects beyond both major surfaces of said pcb.
Claim 17
Dependent Claim
39 words
The device according to claim 9 further comprising means attached to said core assembly for directly engaging conductors on said pcb adjacent the base edge of said U-shaped slot to establish electrical connection between said windings and said conductors.
Claim 18
Dependent Claim
31 words
The device according to claim 15 wherein said engaging means comprises spaced apart resilient contacts positioned to slidingly engage the edge of the pcb defining the base of said U-shaped slot.
Claim 19
Dependent Claim
35 words
The device according to claim 9 further comprising means attached to said core assembly for making direct electrical connection with an AC electrical outlet thereby permitting AC power to be coupled to said primary winding.
Claim 20
Dependent Claim
54 words
The transformer assembly and printed circuit board according to claim 5 further comprising electrical connection means attached to said core assembly slidingly engaging the edge of the pcb that defines the base of the U-shaped slot to establish electrical connection between said windings and pcb conductors adjacent to the base of the U-shaped slot.
Claim 21
Dependent Claim
39 words
The device according to claim 14 further comprising means attached to said core assembly for directly engaging conductors on said pcb adjacent the base edge of said U-shaped slot to establish electrical connection between said windings and said conductors.
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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) | 1993-07-02 | 1994-01-01 | 1994-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-02 | 1998-01-01 | 1998-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-02 | 2002-01-01 | 2002-07-03 | $7700.00 | Window Closed / Lapsed |