US3780928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for stripping brittle wire insulation
Assignee: Sprague Electric Co
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Filing: 1971-12-23
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Granted: 1973-12-25
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Expires: 1991-12-23
Abstract
Abstract A weld of an insulated wire to a metal contact is produced by fracturing the insulation on the wire in a limited section between a pair of opposed hard, smooth surfaces to break the adhesion of the insulation to the wire followed by removing the split insulation and welding the wire cleared of insulation to the electrical contact. The removal of the insulation and the welding of the bare wire can be incorporated in a series of automatic steps for manufacturing an electrical component. The apparatus for removing the insulation from the wire is a pair of opposing hard, smooth surfaces carried on means for reciprocally moving the surfaces toward and away from each other to receive, compress and then release a wire section inserted between them.
Inventors
- 👤 G Shirn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:16
CPC Classifications
H; H02; H02G; H02G1/00; H02G1/12; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/5136; Y10T29/5137; Y10T29/5139; Y10T29/514
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
174 words
An apparatus for preparing a portion of insulated resistance wire with the insulation removed for mounting the wire in an electrical connection on an electrical component, which comprises the combination of a supply of wire coated with a brittle enamel, means for moving said wire, a first glass member having a hard, smooth glass surface forming a first jaw across which said wire is positionable, a reciprocable arm operated around a fulcum having thereon a second glass member having a hard, smooth glass surface forming a second jaw means attached to the reciprocable arm for reciprocal movement of the arm to move the jaws toward each other so as to grip the coated wire between the smooth glass surfaces, a compression means provided by the cooperating first and second jaws, a fracturable coating on the wire being engageable by pressure of the glass jaws and so that the coating splits away from the wire by the jaw pressure and is removable. and means for welding the bared portion of the wire to another member.
Claim 2
Independent Claim
174 words
An apparatus for preparing a portion of insulated resistance wire with the insulation removed for mounting the wire in an electrical connection on an electrical component, which comprises the combination of a supply of wire coated with a brittle enamel, means for moving said wire, a first glass member having a hard, smooth glass surface forming a first jaw across which said wire is positionable, a reciprocable arm operated around a fulcum having thereon a second glass member having a hard, smooth glass surface forming a second jaw means attached to the reciprocable arm for reciprocal movement of the arm to move the jaws toward each other so as to grip the coated wire between the smooth glass surfaces, a compression means provided by the cooperating first and second jaws, a fracturable coating on the wire being engageable by pressure of the glass jaws and so that the coating splits away from the wire by the jaw pressure and is removable. and means for welding the bared portion of the wire to another member.
Claim 3
Dependent Claim
17 words
Apparatus as claimed in claim 1 wherein the enamel coating on the wire is polyimide enamel coating.
Claim 4
Dependent Claim
22 words
Apparatus as claimed in claim 1 wherein the members are rotatably mounted rollers and the surfaces are cylindrical surfaces on the rollers.
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) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |