US3634934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of composite materials
Assignee: Johnson Matthey Ltd
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Filing: 1968-12-26
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Granted: 1972-01-18
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Expires: 1988-12-26
Abstract
Abstract A welded composite formed by cutting and heating continuous lengths of wire and immediately transferring the lengths to a die where the lengths are joined by pressing at high pressure and the joined lengths are then forced at least a portion of the way out of the die where heading operations are performed.
Inventors
- 👤 William M B Fitzgerald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:28
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/02; B21; B21K; B21K1/00; B21K1/58; B21K1/62; B23K2103/00; B23K2103/16; B23K2103/166; B23K2103/172; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49204; Y10T29/49208; Y10T29/4921; Y10T29/49211; Y10T29/49213
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
187 words
A method of forming a composite metal which comprises: a. feeding at least two wires of differing chemical composition and differing elastic limits at least one of which is an electrically conductive material and at least one of which is a base metal, to separate cutting and heating means; b. cutting said wires to a predetermined length and transferring said cut lengths to said heating means; c. preheating each of said cut electrically conductive metal wire and said cut base metal wire respectively to different preparatory bonding temperature; d. transferring said heated wires to a work station and aligning said wires at said work station in axial, abutting relation; e. transferring said wires into a confining space having a diameter slightly larger than the diameter of said wires by the application of pressure against said wires and continuing the application of said pressure so as to join said wires into a composite rod; f. forcing at least a portion of said composite out of said confining space; g. heading said portion extended out of said confining space; and h. thereafter ejecting said composite from said confining space.
Claim 2
Independent Claim
187 words
A method of forming a composite metal which comprises: a. feeding at least two wires of differing chemical composition and differing elastic limits at least one of which is an electrically conductive material and at least one of which is a base metal, to separate cutting and heating means; b. cutting said wires to a predetermined length and transferring said cut lengths to said heating means; c. preheating each of said cut electrically conductive metal wire and said cut base metal wire respectively to different preparatory bonding temperature; d. transferring said heated wires to a work station and aligning said wires at said work station in axial, abutting relation; e. transferring said wires into a confining space having a diameter slightly larger than the diameter of said wires by the application of pressure against said wires and continuing the application of said pressure so as to join said wires into a composite rod; f. forcing at least a portion of said composite out of said confining space; g. heading said portion extended out of said confining space; and h. thereafter ejecting said composite from said confining space.
Claim 3
Dependent Claim
15 words
A method according to claim 1 in which said composite metal is an electrical contact.
Claim 4
Dependent Claim
21 words
A method according to claim 1 wherein said cutting and transferring to said heating means is carried out in one sequence.
Claim 5
Dependent Claim
13 words
A method according to claim 1, wherein said heating means is resistance heating.
Claim 6
Dependent Claim
23 words
A method according to claim 1 wherein all of said listed steps are sequentially carried out in accordance with a hydraulically programmed sequence.
Claim 7
Dependent Claim
16 words
A method according to claim 1, wherein said heating is carried out by a glow discharge.
References Cited (Backward Citations)
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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) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |