US3775207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Producing a filament wound fuseholder
Assignee: Amalga Corp
•
Filing: 1971-10-28
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Granted: 1973-11-27
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Expires: 1991-10-28
Abstract
Abstract Method of making an electrical fuseholder so as to be leakproof and adaptable for submersion in a cooling fluid. At least one metal terminal is wound into and extends through a surrounding wall of resin impregnated filament wound fiberglass so that an electrical contact surface of the metal terminal appears at both the inner and outer sides of the fiberglass wall. An elastomeric sealing means placed between the metal terminal and the fiberglass wall provides a leakproof seal. Liquid resin from the winding operation can be kept off of the inner electrical terminal surface by placing sealing material between an annular terminal member and the winding mandrel prior to winding.
Inventors
- 👤 E Harmon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:05
CPC Classifications
H; H01; H01H; H01H85/00; H01H85/54; H01H85/02; H01H85/20
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
205 words
A method for producing a leakproof electrical fuseholder having at least one terminal with an internal electrical contact surface, an external electrical contact surface, and a resin impregnated filament wound body comprising the steps of: mounting said at least one terminal on a mandrel; applying elastomeric sealing means to the outer surface of said terminal so aS to cover at least a portion of all paths on the surface of said terminal between said external contact surface and the edges of said terminal which define said internal electrical contact surface; winding resin impregnated filaments in a predetermined geometric path about said mandrel and over said elastomeric sealing means so as to form an elongated solid walled body, said winding operation serving to compress said elastomeric sealing means sufficiently to permit said elastomeric sealing means to sealingly contact the outer surface of said terminal and the inner surface of said filament wound body irrespective of dimensional changes of said terminal and wound body caused by temperature variations during use of the fuseholder, and thereafter heating the solid walled body and mandrel to cure the resin and bond the elastomeric sealing means to the terminal and filament wound body, and then removing the fuseholder from the mandrel.
Claim 2
Independent Claim
205 words
A method for producing a leakproof electrical fuseholder having at least one terminal with an internal electrical contact surface, an external electrical contact surface, and a resin impregnated filament wound body comprising the steps of: mounting said at least one terminal on a mandrel; applying elastomeric sealing means to the outer surface of said terminal so aS to cover at least a portion of all paths on the surface of said terminal between said external contact surface and the edges of said terminal which define said internal electrical contact surface; winding resin impregnated filaments in a predetermined geometric path about said mandrel and over said elastomeric sealing means so as to form an elongated solid walled body, said winding operation serving to compress said elastomeric sealing means sufficiently to permit said elastomeric sealing means to sealingly contact the outer surface of said terminal and the inner surface of said filament wound body irrespective of dimensional changes of said terminal and wound body caused by temperature variations during use of the fuseholder, and thereafter heating the solid walled body and mandrel to cure the resin and bond the elastomeric sealing means to the terminal and filament wound body, and then removing the fuseholder from the mandrel.
Claim 3
Dependent Claim
50 words
A method of producing a leakproof electrical fuseholder in accordance with claim 1 and further including the step of placing sealing means between said mandrel and said at least one terminal prior to winding said resin impregnated filaments so as to prevent resin from contacting said internal electrical contact surface.
Claim 4
Dependent Claim
53 words
A method of producing a leakproof electrical fuseholder in accordance with claim 2 and further including the step of applying adhesive bonding materials to the outer surface of said at least one terminal prior to applying said elastomeric sealing means so as permit said elastomeric sealing means to be bonded to said terminal.
Claim 5
Dependent Claim
36 words
A method of producing a leakproof electrical fuseholder in accordance with claim 2 wherein said last named sealing means comprises sealing rings placed in grooves in said mandrel adjacent the edges of said inner contact surface.
References Cited (Backward Citations)
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US2929900A
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US2870295A
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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) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |