US3750054A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Miniature delay line
Assignee: Panasonic Holdings Corp
•
Filing: 1971-10-26
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Granted: 1973-07-31
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Expires: 1991-10-26
Abstract
Abstract A delay line for use at high frequencies. The delay line has a core having a core member with at least one pair of flanges therein. A silver paint layer covers the plastic core, and a multiturn coil of a resin-coated wire is wound on the core between the flanges. Terminals are provided on the core appropriately connected to the wire of the coil and to the silver paint layer, and the core and coil are enclosed in a housing.
Inventors
- 👤 K Hashimoto
- 👤 T Tamura
- 👤 S Kondo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:23
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/30; H03H7/34
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
20 words
A delay line according to claim 1 wherein said multiturn coil is spaced from the interior surface of the housing.
Claim 2
Dependent Claim
23 words
A delay line according to claim 1 wherein said silver paint layer has a specific surface electric resistivity of 1 to 10 ohms.
Claim 3
Dependent Claim
20 words
A delay line according to claim 3 wherein said silver paint layer has a thickness of 10 to 100 microns.
Claim 4
Dependent Claim
31 words
A delay line according to claim 1 wherein said coil filler is a material selected from the group consisting of polymethyl pehnyl silicone, polyalkylphenyl silicone, polydimethyl silicone, poly-trifluorochloroethane and combinations thereof.
Claim 5
Dependent Claim
36 words
A delay line according to claim 1 wherein said resin-coated wire is coated with a resin selected from the group consisting of polyurethane, polyamide and combinations thereof, and has a thickness of 10 to 20 microns.
Claim 6
Dependent Claim
27 words
A delay line according to claim 1 wherein said unitary core is a plastic selected from the group consisting of phenolic resin, epoxy resin and polyester resin.
Claim 7
Independent Claim
114 words
A method for making a delay line comprising the steps of forming a plastic unitary core having a core member and at least one pair of flanges integral therewith, treating the surface of said plastic unitary core with a trialkyl benzylammonium chloride type surface active agent; drying the treated plastic unitary core, dipping the dried plastic unitary core in a silver paint, curing said silver paint, providing a multiturn coil on said core between said flanges, filling said multiturn coil with a coil filler, mounting one terminal on one end of said unitary core, and two terminals on the other end of said unitaRy core, and enveloping the resulting unitary core in a housing.
Claim 8
Dependent Claim
25 words
A method for making a delay line according to claim 8 wherein said resulting unitary core is enveloped in a housing filled with dry air.
References Cited (Backward Citations)
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US3063136A
Cited
US3308414A
Cited
US3348302A
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Cited
US3675174A
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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) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |