US3934109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Latch pivot for latch needle
Assignee: EXELTOR Inc A CORP OF CANADA
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Filing: 1974-02-07
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Granted: 1976-01-20
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Expires: 1994-02-07
Abstract
Abstract This is a knitting machine latch needle. The latch pivot is formed by displacing portions of the walls of the slot so that the displaced portions extend into the pivot hole of the latch. The displaced portions of the walls are fused together by a high energy heat source emitting sufficient energy to either drill a hole through the displaced portions or melt the displaced portions.
Inventors
- 👤 Richard W. Shepard
- 👤 Albert S. Ashmead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:47
CPC Classifications
B; B23; B23K; B23K26/00; B23K26/20; B23K26/21; B23K26/22; D; D04; D04B; D04B35/00; D04B35/02; D04B35/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
154 words
In a method of forming a latch pivot for the latch of a latch needle, having portions of the opposite walls of the slot in the needle displaced into a pivot hole of the latch, with a space between the displaced portions and with spaces separating the latch from each of the opposite walls of the slot, the improvement comprising the steps of: applying controlled heat from a high energy heat source against at least one of said displaced wall portions to at least melt a portion of said displaced wall portion so that molten metal is formed in the space between the two displaced wall portions; the extent of the molten metal being controlled to substantially fill said space without contacting the latch and allowing the molten metal to solidify to fuse the displaced wall portions together without changing the spaces separating the latch from each of the opposite walls of the slot.
Claim 2
Dependent Claim
154 words
In a method of forming a latch pivot for the latch of a latch needle, having portions of the opposite walls of the slot in the needle displaced into a pivot hole of the latch, with a space between the displaced portions and with spaces separating the latch from each of the opposite walls of the slot, the improvement comprising the steps of: applying controlled heat from a high energy heat source against at least one of said displaced wall portions to at least melt a portion of said displaced wall portion so that molten metal is formed in the space between the two displaced wall portions; the extent of the molten metal being controlled to substantially fill said space without contacting the latch and allowing the molten metal to solidify to fuse the displaced wall portions together without changing the spaces separating the latch from each of the opposite walls of the slot.
Claim 3
Dependent Claim
57 words
The method of forming a latch pivot in accordance with claim 1 wherein the molten metal is formed by applying heat of sufficient thermal energy to the outside of said displaced wall portion to make a small hole entirely through said displaced wall portion to form a splash of molten metal between the two displaced wall portions.
Claim 4
Dependent Claim
18 words
The method of claim 2 wherein a small hole is formed through both of the displaced wall portions.
Claim 5
Dependent Claim
37 words
The method of claim 1 wherein the molten metal is formed by applying against said displaced wall portion a high energy heat beam of sufficient energy to melt at least a portion of said displaced wall portion.
References Cited (Backward Citations)
US1433123A
Cited
US1961430A
Cited
US1991140A
Cited
US3137340A
Cited
US3562009A
Cited
US3632398A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |