US4315232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Subminiature audio transformer
Assignee: Individual
•
Filing: 1980-02-07
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Granted: 1982-02-09
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Expires: 2000-02-07
Abstract
Abstract A subminiature transformer is provided. The transformer comprises a bobbin having a slit extending therethrough. The transformer core is formed of a plurality of gapless laminations each passed into the bobbin through a slit.
Inventors
- 👤 Henry Spoldi
- 👤 Joseph N. Sweeney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:27
CPC Classifications
H; H01; H01F; H01F27/00; H01F27/28; H01F27/30; H01F27/306; H01F19/00; H01F19/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49073
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
93 words
A subminiature transformer comprising: a bobbin having an annular bobbin shaft having an open center section. a first flange at one end of said shaft and a second flange at the opposite end of said shaft, a rim extending beyond said first flange, and a split extending for the entire length of said bobbin into said center section; a plurality of terminal members positioned on said rim; a plurality of gapless transformer core laminations forming a core stack, each of said laminations being passed through said split to link with said bobbin; and
Claim 2
Dependent Claim
93 words
A subminiature transformer comprising: a bobbin having an annular bobbin shaft having an open center section. a first flange at one end of said shaft and a second flange at the opposite end of said shaft, a rim extending beyond said first flange, and a split extending for the entire length of said bobbin into said center section; a plurality of terminal members positioned on said rim; a plurality of gapless transformer core laminations forming a core stack, each of said laminations being passed through said split to link with said bobbin; and
Claim 3
Dependent Claim
25 words
a plurality of wire coils wound about said bobbin between said flanges, each end of each said coils being connected to one of said terminals.
Claim 4
Dependent Claim
25 words
a plurality of wire coils wound about said bobbin between said flanges, each end of each said coils being connected to one of said terminals.
Claim 5
Dependent Claim
39 words
The invention in accordance with claim 1 further comprising an annular cap seated on said rim and capturing said terminal members between said rim and said cap, said cap having a split therein in registry with said bobbin split.
Claim 6
Dependent Claim
32 words
The invention in accordance with claim 1 wherein the flange adjacent said rim is provided with a plurality of passages therein, at least one passage being adjacent each one of said terminals.
Claim 7
Dependent Claim
33 words
The invention in accordance with claim 3 wherein each end of said windings is drawn through a passage into a pocket defined between the flange and rim for connection with its adjacent terminal.
Claim 8
Dependent Claim
32 words
The invention in accordance with claim 1 wherein each of said laminations is generally rectangular and the corner of each lamination passed through said bobbin and directed toward said rim is rounded.
Claim 9
Dependent Claim
22 words
The invention in accordance with claim 1 wherein one of said terminals is formed of a material different from the remaining terminals.
Claim 10
Dependent Claim
14 words
The invention in accordance with claim 1 further comprising a container encasing said bobbin.
Claim 11
Dependent Claim
45 words
The invention in accordance with claims 1, 2, 3, 5, 6 or 7 further comprising a third flange interposed between said first and second flanges and said windings are disposed partially between said first and third flanges and partially between said third and second flanges.
References Cited (Backward Citations)
US708220A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-02-08 | 1985-08-10 | 1986-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-08 | 1989-08-10 | 1990-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-08 | 1993-08-10 | 1994-02-09 | $7700.00 | Window Closed / Lapsed |