US3835912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of joining a filament to a metal rod
Assignee: S K S Ltd
•
Filing: 1973-06-25
•
Granted: 1974-09-17
•
Expires: 1993-06-25
Abstract
Abstract A metal tube is butted against a metal rod. The rod and tube are welded together using a laser energy source. A filament is inserted into the tube and secured therein. The rod may then be sharpened to serve as a needle.
Inventors
- 👤 P Kristensen
- 👤 W Simon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:35
CPC Classifications
B; B23; B23K; B23K26/00; B23K26/02; B23K26/06; B23K26/067; A; A61; A61B; A61B17/00; A61B17/04; A61B17/06; A61B17/06004; B21; B21G; B21G1/00; B21G1/10; B23K26/0604; B23K26/0619; Y; Y10; Y10S; Y10S228/00; Y10S228/903
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
72 words
The method of joining a filament to a metal rod via a metal tube, using a laser energy source, comprising the steps of: a. butting the tube against the rod; b. welding the tube to the rod by applying light from the laser energy source to an area surrounding the junction between the tube and the rod; c. inserting the filament into the tube; and d. securing the filament within the tube.
Claim 2
Independent Claim
72 words
The method of joining a filament to a metal rod via a metal tube, using a laser energy source, comprising the steps of: a. butting the tube against the rod; b. welding the tube to the rod by applying light from the laser energy source to an area surrounding the junction between the tube and the rod; c. inserting the filament into the tube; and d. securing the filament within the tube.
Claim 3
Dependent Claim
64 words
The method of claim 1 wherein the step of welding further comprises: b. i. providing a beam of laser light from the laser energy source; ii. splitting the beam of laser light into a plurality of light beams; and iii. directing each of the plurality of light beams to a predetermined point on the area surrounding the junction between the tube and the rod.
Claim 4
Dependent Claim
56 words
The method of claim 2 wherein the step of splitting the beam of laser light further comprises applying the beam to a beam splitter, and the step of directing the plurality of light beams further comprises reflecting at least some of the plurality of light beams from reflective surfaces to predetermined points on the surrounding area.
Claim 5
Dependent Claim
20 words
The method of claim 3 wherein the step of securing the filament further comprises cementing the filament within the tube.
Claim 6
Dependent Claim
20 words
The method of claim 3 wherein the step of securing the filament further comprises crimping the tube against the filament.
Claim 7
Dependent Claim
60 words
The method of claim 1 wherein the step of welding further comprises: b. i. providing a beam of laser light from the laser energy source; ii. converting the beam of laser light into a disc of light; and iii. positioning the disc of light to form a ring of light converging on the junction of the tube and the rod.
Claim 8
Dependent Claim
53 words
The method of claim 6 wherein the step of converting the beam of light further comprises broadening the beam of laser light to a beam of light having a diameter of 2r, and applying the broadened beam to a conical reflective surface to provide the disc of light having a thickness of r.
Claim 9
Dependent Claim
71 words
The method of claim 7 wherein the step of positioning the disc of light further comprises translating the disc into a hollow beam having a wall thickness of r by reflecting the disc from a first inside, conical reflective surface, and re-translating the hollow beam into a disc of light converging on the junction, having a thickness of r, by reflecting the hollow beam from a second, inside, reflective conical surface.
Claim 10
Dependent Claim
20 words
The method of claim 6 wherein the step of securing the filament further comprises cementing the filament within the tube.
Claim 11
Dependent Claim
20 words
The method of claim 6 wherein the step of securing the filament further comprises crimping the tube against the filament.
Claim 12
Dependent Claim
20 words
The method of claim 8 wherein the step of securing the filament further comprises cementing the filament within the tube.
Claim 13
Dependent Claim
20 words
The method of claim 8 wherein the step of securing the filament further comprises crimping the tube against the filament.
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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |