US4408171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Noise filter with socket attached thereto
Assignee: TDK Corp
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Filing: 1981-03-13
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Granted: 1983-10-04
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Expires: 2001-03-13
Abstract
Abstract A noise filter with a socket attached thereto including a case made of metallic material mounting a pair of pierce type (feed through) capacitors and a power input socket having a pair of power input contacts and a grounding contact, a choke coil having a pair of coil windings wound thereabout and a capacitor interposed between said pair of coil windings mounted inside said case, said pierce type capacitors including inner piercing (feed through) terminals and outer terminals, said power input contacts and the piercing terminals of said pierce type capacitors being connected to one another via said coil windings, and said grounding contact and the outer terminals of said pierce type capacitors being electrically connected to the case.
Inventors
- 👤 Tadaharu Akino
- 👤 Akira Nakamura
- 👤 Hiroyuki Uemura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:16
CPC Classifications
H; H01; H01R; H01R31/00; H01R31/06; H01R31/065; H03; H03H; H03H7/00; H03H7/42; H03H7/425; H03H7/427; H03H1/00; H03H2001/0021; H03H2001/0042
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
132 words
A noise filter comprising; a casing made of metallic material; a power input socket having a pair of power input contacts and a grounding contact that is mounted on one of the walls of said casing and is electrically coupled to said casing; a pair of feed through type capacitors, each including a ground conductor mounted on another wall of said casing and a center rod that extends outwardly to serve as a power output contact; a choke coil with a pair of windings mounted in said casing; a capacitor mounted in said casing and electrically coupling together said center rods of said feed through capacitors; each of said power input contacts being electrically coupled to a center rod of said feed through type capacitor by an individual one of said windings.
Claim 2
Dependent Claim
132 words
A noise filter comprising; a casing made of metallic material; a power input socket having a pair of power input contacts and a grounding contact that is mounted on one of the walls of said casing and is electrically coupled to said casing; a pair of feed through type capacitors, each including a ground conductor mounted on another wall of said casing and a center rod that extends outwardly to serve as a power output contact; a choke coil with a pair of windings mounted in said casing; a capacitor mounted in said casing and electrically coupling together said center rods of said feed through capacitors; each of said power input contacts being electrically coupled to a center rod of said feed through type capacitor by an individual one of said windings.
Claim 3
Dependent Claim
42 words
A noise filter with a socket attached thereto as set forth in claim 1, in which the socket is fixedly secured to the casing by a grounding member soldered to the casing, said grounding member being tightly fixed to said grounding contact.
Claim 4
Dependent Claim
29 words
A noise filter with a socket attached thereto as set forth in claim 1, in which the socket is secured to the casing by being interfitted into said casing.
Claim 5
Dependent Claim
35 words
A noise filter with a socket attained thereto as set forth in claim 1, in which the socket has a fuse incorporated therein, said fuse being connected in series with one of said coil windings.
Claim 6
Dependent Claim
25 words
A noise filter with a socket attached thereto as set forth in claim 1, in which said feed through type capacitors have a varister characteristic.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-03 | 1987-04-04 | 1987-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-03 | 1991-04-04 | 1991-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-03 | 1995-04-04 | 1995-10-04 | $7700.00 | Window Closed / Lapsed |