Patent US3751960A successfully refreshed from Google Patents.
US3751960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wire piercing method and apparatus
Assignee: Nortel Networks Ltd
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Filing: 1971-10-07
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Granted: 1973-08-14
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Expires: 1991-10-07
Abstract
Abstract Holes are formed in wires by shearing a wire along its diameter and deforming the two halves in opposite directions. A tool for forming such holes has two opposed cutting edges and an abutment surface associated with each cutting edge. Relative movement of the cutting edges, in a shearing action, slits the wire and the abutment surfaces push the wire halves in opposite directions to form a hole -which can be larger in diameter than the diameter of the wire.
Inventors
- 👤 W Anhang
- 👤 A Morton
- 👤 F Belanger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:02
CPC Classifications
H; H05; H05K; H05K13/00; H05K13/0007; B; B21; B21F; B21F13/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
215 words
Apparatus for piercing a wire to form a hole, said apparatus including two shearing members mounted for relative movement towards and away from each other, each shearing member comprising: a body portion including a forward end and a rearward end, a support member extending from said forward end of said body portion, a support surface on said support member, a cutting member on said support member, said cutting member including a convex apex; an abutment surface on said cutting member extending from said support surface normal thereto, an outer surface on said cutting member the plane of said outer surface parallel to said support surface and spaced from said support surface a distance equal to half the thickness of said wire and intercepting said abutment surface, and a cutting edge on said cutting member at the intersection of said abutment surface and said outer surface, said cutting edge of convex form in the plane of said outer surface; means supporting said shearing members in opposition said apeces of said cutting members in alignment, said planes of said outer surfaces substantially coincidental, said support members positioned one on each side of said coincidental planes; and means for moving said shearing members relative to each other along an axis passing through said body portions and support members.
Claim 2
Dependent Claim
215 words
Apparatus for piercing a wire to form a hole, said apparatus including two shearing members mounted for relative movement towards and away from each other, each shearing member comprising: a body portion including a forward end and a rearward end, a support member extending from said forward end of said body portion, a support surface on said support member, a cutting member on said support member, said cutting member including a convex apex; an abutment surface on said cutting member extending from said support surface normal thereto, an outer surface on said cutting member the plane of said outer surface parallel to said support surface and spaced from said support surface a distance equal to half the thickness of said wire and intercepting said abutment surface, and a cutting edge on said cutting member at the intersection of said abutment surface and said outer surface, said cutting edge of convex form in the plane of said outer surface; means supporting said shearing members in opposition said apeces of said cutting members in alignment, said planes of said outer surfaces substantially coincidental, said support members positioned one on each side of said coincidental planes; and means for moving said shearing members relative to each other along an axis passing through said body portions and support members.
Claim 3
Dependent Claim
51 words
Apparatus as claimed in claim 1, each shearing member including an inclined end surface at its end opposed to said web, said inclined end surfaces arranged whereby movement of a member in a direction normal to said common plane acts on said inclined end surfaces to urge the shearing members together.
Claim 4
Dependent Claim
31 words
Apparatus as claimed in claim 2, the member acting on said inclined end surfaces comprising a press member, said press member having inclined surfaces for cooperation with said inclined end surfaces.
Claim 5
Dependent Claim
42 words
Apparatus as claimed in claim 1 comprising a toggle action pliers, said shearing members attached one to each jaw of said pliers, mOvement of the handles of the pliers moving the shearing members in a direction substantially parallel to said common plane.
Claim 6
Dependent Claim
24 words
Apparatus as claimed in claim 4 including adjustable abutment means for controlling the closing of said pliers and controlling the shearing of the wire.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |