US3725632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple spot welding machines
Assignee: EVG Entwicklungs und Verwertungs GmbH
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Filing: 1971-03-16
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Granted: 1973-04-03
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Expires: 1991-03-16
Abstract
Abstract A multiple spot welding machine suitable for the manufacture of welded wire mesh for concrete reinforcement has two pairs of bus bars supported on a transverse wall extending upwardly from a base plate of the machine. Two rows of transformers, for feeding the two pairs of bus bars, are arranged one on each side of the transverse wall. A number of electrodes are shiftable along the bus bars to any one of which each electrode is connectable. A vertically movable spring loaded bridging electrode is provided above the electrodes on the bus bars.
Inventors
- 👤 J Ritter
- 👤 H Gott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:27
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/30; B23K11/31; B23K11/312
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
61 words
A multiple spot welding machine comprising a base plate, central transverse wall means extending upwardly from said base plate, a system of transverse bus bars supported on said transverse wall means under and close to a line of welding, and two rows of transformers for feeding said bus bar system and disposed one on either side of said transverse wall means.
Claim 2
Dependent Claim
61 words
A multiple spot welding machine comprising a base plate, central transverse wall means extending upwardly from said base plate, a system of transverse bus bars supported on said transverse wall means under and close to a line of welding, and two rows of transformers for feeding said bus bar system and disposed one on either side of said transverse wall means.
Claim 3
Dependent Claim
54 words
A welding machine according to claim 1, wherein said bus bar system comprises two pairs of bus bars arranged closely side by side, one of said rows of said transformers feeding one of said bus bar pairs and the other of said rows of said transformers feeding the other of said bus bar pairs.
Claim 4
Dependent Claim
119 words
A multiple spot welding machine comprising a base plate, transverse wall means extending upwardly from said base plate, a system of transverse bus bars supported on said transverse wall means, and two rows or transformers for feeding said bus bar system and disposed one on either side of said transverse wall means, said bus bar system including three independent sections fed by three transformers each of which is adapted to receive a single phase from a three-phase power supply, each of said bus bar sections being fed by two transformers and means provided for connecting said two transformers as a pair alternatively in series or in parallel with each other to the same phase of said three-phase power supply.
Claim 5
Dependent Claim
119 words
A multiple spot welding machine comprising a base plate, transverse wall means extending upwardly from said base plate, a system of transverse bus bars supported on said transverse wall means, and two rows or transformers for feeding said bus bar system and disposed one on either side of said transverse wall means, said bus bar system including three independent sections fed by three transformers each of which is adapted to receive a single phase from a three-phase power supply, each of said bus bar sections being fed by two transformers and means provided for connecting said two transformers as a pair alternatively in series or in parallel with each other to the same phase of said three-phase power supply.
Claim 6
Dependent Claim
29 words
A welding machine according to claim 3, wherein each of said two transformers feeding each bus bar pair comprises one primary and two secondary Windings on a common core.
Claim 7
Dependent Claim
47 words
A welding machine according to claim 1 wherein gaps are formed between ends of adjacent bus bar sections and said gaps are staggered in position along said transverse wall, whereby at any given cross-section through said bus bar system not more than one gap can be intersected.
Claim 8
Dependent Claim
45 words
A welding machine according to claim 1 further including two mains transformers, one mains transformer feeding one row of transformers for feeding said bus bar system and said other of said mains transformers feeding said other row of transformers for feeding the bus bar system.
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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |