US3735089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple electrode resistance welding machine
Assignee: Sciaky Brothers Inc
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Filing: 1971-11-05
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Granted: 1973-05-22
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Expires: 1991-11-05
Abstract
Abstract The subject of this invention is a multiple electrode resistance welding machine in which, by a particular configuration of the conductors which connect the power supply to the several welding positions, the DC resistance and the inductance of the circuit between the power supply and each of the welding guns is made constant. Through the use of the novel arrangement of secondary circuit conductors, the total resistance and the inductors in all of the circuits is the same so that the welding current and wave shape is the same in all of the secondary gun circuits and the weld quality at all of the welding points is uniform.
Inventors
- 👤 D Sciaky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:04
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/30; B23K11/31; B23K11/312
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
185 words
In a multi-gun resistance welding machine, a power supply having a set of input and a set of output terminals, a first bus bar connected at its one end to one of said set of output terminals, a second bus bar insulated electrically from and disposed in close proximity and parallel to the first said bus bar, a third bus bar, disposed parallel to but laterally positioned from the said first two bus bars, whose one end is connected by the shortest possible connection to that end of the second bus bar which is opposite the first mentioned end of the first bus bar and whose other end is connected to another one of said set of output terminals, pairs of terminal points arranged along the said first two bus bars each pair of said terminals consisting of a terminal point on the first bus bar and a terminal point on the second bus bar, said terminals in each of said pairs being arranged in closest proximity to one another, and means for connecting a welding gun to each of the said sets of terminals.
Claim 2
Dependent Claim
185 words
In a multi-gun resistance welding machine, a power supply having a set of input and a set of output terminals, a first bus bar connected at its one end to one of said set of output terminals, a second bus bar insulated electrically from and disposed in close proximity and parallel to the first said bus bar, a third bus bar, disposed parallel to but laterally positioned from the said first two bus bars, whose one end is connected by the shortest possible connection to that end of the second bus bar which is opposite the first mentioned end of the first bus bar and whose other end is connected to another one of said set of output terminals, pairs of terminal points arranged along the said first two bus bars each pair of said terminals consisting of a terminal point on the first bus bar and a terminal point on the second bus bar, said terminals in each of said pairs being arranged in closest proximity to one another, and means for connecting a welding gun to each of the said sets of terminals.
Claim 3
Dependent Claim
24 words
A resistance welding machine as in claim 1 in which the power supply delivers direct current derived by rectification of an alternating current source.
Claim 4
Dependent Claim
33 words
A resistance welding machine as in claim 1 in which the group of bus bars is contoured so as to conform to the outer peripheral shape of the work piecEs to be welded.
Claim 5
Dependent Claim
28 words
A resistance welding machine as in claim 1 in which the distance of the said third bus bar from the first and second bus bars may be varied.
Claim 6
Dependent Claim
43 words
A resistance welding machine as in claim 1 in which the group of bus bars is contoured so as to surround the outer periphery of the work pieces to be welded in the plane passing through the electrodes of the aforesaid welding guns.
Claim 7
Dependent Claim
22 words
A resistance welding machine as in claim 1 in which variable volumes of iron are fastened to the said third bus bar.
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) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |