Patent US3743283A successfully refreshed from Google Patents.
Patent US3562482A successfully refreshed from Google Patents.
US3562482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-aligning electrode tip holder
Assignee: Nortel Networks Ltd
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Filing: 1968-07-16
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Granted: 1971-02-09
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Expires: 1988-07-16
Abstract
Abstract The invention relates to an electrode holding and self-aligning device on a transistor encapsulation welding machine for insuring parallelism between the contact surfaces of top and bottom electrodes. The device consists of a hollow cylindrical taper, the wall of which is partly sectioned by elongated equally distanced slots. The upper end of the taper is provided with a recess for receiving the bottom electrode. The bottom assembly consisting of electrode and electrode holding device is inserted in a cavity situated in the base of the welding machine. When the top electrode assembly is forced under suitable pressure onto the bottom electrode assembly, the taper self-adjusts in the cavity thereby bringing the contact surface of the bottom electrode into parallelism with the contact surface of the top electrode.
Inventors
- 👤 Andrzej Friedberg
- 👤 Andreas Keusch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:29
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/30; B23K11/3009
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
227 words
A welding machine comprising in combination: a pair of electrodes, each having a working surface and being arranged to be brought into operative engagement to weld a workpiece positioned therebetween; an electrode holder for one of the electrodes comprising an elongated member of generally circular cross section being tapered on its outer surface inwardly from one end thereof and having an axial bore opening at said one end, a portion of the bore adjacent said one end being adapted to receive said one electrode, said member having elongated slots extending generally axially from said one end to form resilient sections on the electrode holder; a supPort having a cavity for receiving the electrode holder, the cavity being defined by a wall of a shape to engage said resilient sections at the tapered portion of the electrode holder over an annular area of contact approaching line contact relative to the length of said tapered portion, the remainder of the wall of the cavity being spaced from the outer surface of the elongated member to permit angular adjustment of the electrode holder relative to the wall of the cavity; and said resilient sections coacting with the wall of the cavity to grip said one electrode and to align the electrode holder when the electrodes are brought into operative engagement to achieve parallelism of the working surfaces of the electrodes.
Claim 2
Dependent Claim
227 words
A welding machine comprising in combination: a pair of electrodes, each having a working surface and being arranged to be brought into operative engagement to weld a workpiece positioned therebetween; an electrode holder for one of the electrodes comprising an elongated member of generally circular cross section being tapered on its outer surface inwardly from one end thereof and having an axial bore opening at said one end, a portion of the bore adjacent said one end being adapted to receive said one electrode, said member having elongated slots extending generally axially from said one end to form resilient sections on the electrode holder; a supPort having a cavity for receiving the electrode holder, the cavity being defined by a wall of a shape to engage said resilient sections at the tapered portion of the electrode holder over an annular area of contact approaching line contact relative to the length of said tapered portion, the remainder of the wall of the cavity being spaced from the outer surface of the elongated member to permit angular adjustment of the electrode holder relative to the wall of the cavity; and said resilient sections coacting with the wall of the cavity to grip said one electrode and to align the electrode holder when the electrodes are brought into operative engagement to achieve parallelism of the working surfaces of the electrodes.
Claim 3
Dependent Claim
22 words
A welding machine as defined in claim 1 further comprising a knockout member in said cavity for removing said electrode holder therefrom.
Claim 4
Dependent Claim
32 words
A welding machine as defined in claim 2 wherein said bore extends through said member and the knockout member has a top portion extending through said bore for dislodging the welded workpiece.
Claim 5
Dependent Claim
24 words
A welding machine as define in claim 2 further comprising a second knockout member in said cavity adapted to actuate said first knockout member.
Claim 6
Dependent Claim
75 words
A welding machine as defined in claim 1 wherein said second electrode holder consists of a second tubular member having adjacent one end thereof an inner recess for partly containing said second electrode, the wall of said second tubular member being partly sectioned by elongated longitudinal slots, each slot extending from said one end of said second tubular member to a point on said wall thereof to form resilient sections on said second electrode holder.
Claim 7
Dependent Claim
30 words
A welding machine as defined in claim 5 wherein pin means are provided in said frame behind said second electrode holder for removing said second electrode holder from said frame.
Claim 8
Dependent Claim
18 words
A welding machine as defined in claim 1 wherein the electrode holder is provided with three elongated slots.
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |