US3692970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric resistance welding machines
Assignee: EVG Entwicklungs und Verwertungs GmbH
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Filing: 1971-03-22
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Granted: 1972-09-19
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Expires: 1991-03-22
Abstract
Abstract An electric resistance welding machine has several pairs of active electrodes below the work piece, such as mesh, being welded. Above the work piece a current bridge is provided for each pair of active electrodes, the current bridge being lowered in use so that the work piece is gripped at welding points between the active electrodes and the bridge, the welding current flowing from one active electrode, through the work piece at one welding point, across the current bridge, through the work piece of the other welding point, and back to the other of the pair of active electrodes. The current bridge is pivoted near its two ends on the ends of guided thrust rods which are spring loaded with independent adjustment of the two spring loads, each thrust rod having fixed near one end a spring support which seats in a seating and is accurately located when in contact therewith, the other end of each thrust rod being loosely guided so that the bridge during its work piece engaging movement can perform a limited deflection having both rotary and translational components.
Inventors
- 👤 Hans Gott
- 👤 Klaus Ritter
- 👤 Josef Ritter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:03
CPC Classifications
B; B23; B23K; B23K11/00; B23K11/36; B23K11/362
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
187 words
An electric resistance welding machine having at least one pair of active electrodes disposed to one side of a work piece plane, an electrode beam disposed to the other side of said work piece plane, and at least one current bridge mounted on said electrode beam, the improved mounting means for said current bridge comprising a first thrust rod, means pivotally connecting an end of said first thrust rod to said current bridge adjacent one end thereof, a second thrust rod, means pivotally connecting an end of said second thrust rod to said current bridge adjacent the other end thereof, spring support means on each of said first and second thrust rods, locating means on each of said first and second thrust rods, seating means on said beam for each of said locating means, said locating means and said seating means having self-centering tapering complementary contact surfaces, guide means on said electrode beam for each rod adapted to permit substantal radial movement of said rod, and adjustable spring means for each of said first and second rods adapted to urge said locating means into said seating means.
Claim 2
Dependent Claim
187 words
An electric resistance welding machine having at least one pair of active electrodes disposed to one side of a work piece plane, an electrode beam disposed to the other side of said work piece plane, and at least one current bridge mounted on said electrode beam, the improved mounting means for said current bridge comprising a first thrust rod, means pivotally connecting an end of said first thrust rod to said current bridge adjacent one end thereof, a second thrust rod, means pivotally connecting an end of said second thrust rod to said current bridge adjacent the other end thereof, spring support means on each of said first and second thrust rods, locating means on each of said first and second thrust rods, seating means on said beam for each of said locating means, said locating means and said seating means having self-centering tapering complementary contact surfaces, guide means on said electrode beam for each rod adapted to permit substantal radial movement of said rod, and adjustable spring means for each of said first and second rods adapted to urge said locating means into said seating means.
Claim 3
Dependent Claim
248 words
An electric resistance welding machine having at least one pair of active electrodes disposed to one side of a work piece plane, an electrode beam disposed to the other side of said work piece plane, and at least one current bridge mounted on said electrode beam, the improved mounting means for said current bridge comprising a first thrust rod, means pivotally connecting an end of said first thrust rod to said current bridge adjacent one end thereof, a second thrust rod, means pivotally connecting an end of said second thrust rod to said current bridge adjacent the other end thereof, spring support means on each of said first and second thrust rods, locating means on each of said first and second thrust rods, seating means on said beam for each of said locating means, said locating means and said seating means having self-centering complementary contacT surfaces, guide means on said electrode support beam for each rod adapted to permit substantial radial movement of said rod, and adjustable spring means for each of said first and second rods adapted to urge said locating means into said seating means, said adjustable spring means for each of said thrust rods comprising a helical spring surrounding the respective one of said rods, a washer through which said rod passes, an externally threaded bush, and a nut fixedly supported by said electrode beam and adjustably receiving said externally threaded bush, said helical spring being disposed between said spring support means and said washer.
Claim 4
Dependent Claim
248 words
An electric resistance welding machine having at least one pair of active electrodes disposed to one side of a work piece plane, an electrode beam disposed to the other side of said work piece plane, and at least one current bridge mounted on said electrode beam, the improved mounting means for said current bridge comprising a first thrust rod, means pivotally connecting an end of said first thrust rod to said current bridge adjacent one end thereof, a second thrust rod, means pivotally connecting an end of said second thrust rod to said current bridge adjacent the other end thereof, spring support means on each of said first and second thrust rods, locating means on each of said first and second thrust rods, seating means on said beam for each of said locating means, said locating means and said seating means having self-centering complementary contacT surfaces, guide means on said electrode support beam for each rod adapted to permit substantial radial movement of said rod, and adjustable spring means for each of said first and second rods adapted to urge said locating means into said seating means, said adjustable spring means for each of said thrust rods comprising a helical spring surrounding the respective one of said rods, a washer through which said rod passes, an externally threaded bush, and a nut fixedly supported by said electrode beam and adjustably receiving said externally threaded bush, said helical spring being disposed between said spring support means and said washer.
Claim 5
Dependent Claim
41 words
A machine according to claim 2 wherein said spring support means for each of said rods comprises a portion of a collar fixed to the respective one of said rods and said locating means comprises a different portion of said collar.
Claim 6
Dependent Claim
202 words
An electric resistance welding machine having at least one pair of active electrodes disposed to one side of a work piece plane, an electrode beam disposed to the other side of said work piece plane, and at least one current bridge mounted on said electrode beam, the improved mounting means for said current bridge comprising a first thrust rod, means pivotally connecting an end of said first thrust rod to said current bridge adjacent one end thereof, a second thrust rod, means pivotally connecting an end of said second thrust rod to said current bridge adjacent the other end thereof, spring support means on each of said first and second thrust rods, locating means on each of said first and second thrust rods, seating means on said beam for each of said locating means, said locating means and said seating means having self-centering complementary contact surfaces, guide means on said electrode support beam for each rod adapted to permit substantial radial movement of said rod, and adjustable spring means for each of said first and second rods adapted to urge said locating means into said seating means, said complementary self-centering surfaces of said locating means and of said seating means being conical.
Claim 7
Dependent Claim
202 words
An electric resistance welding machine having at least one pair of active electrodes disposed to one side of a work piece plane, an electrode beam disposed to the other side of said work piece plane, and at least one current bridge mounted on said electrode beam, the improved mounting means for said current bridge comprising a first thrust rod, means pivotally connecting an end of said first thrust rod to said current bridge adjacent one end thereof, a second thrust rod, means pivotally connecting an end of said second thrust rod to said current bridge adjacent the other end thereof, spring support means on each of said first and second thrust rods, locating means on each of said first and second thrust rods, seating means on said beam for each of said locating means, said locating means and said seating means having self-centering complementary contact surfaces, guide means on said electrode support beam for each rod adapted to permit substantial radial movement of said rod, and adjustable spring means for each of said first and second rods adapted to urge said locating means into said seating means, said complementary self-centering surfaces of said locating means and of said seating means being conical.
Claim 8
Dependent Claim
202 words
An electric resistance welding machine having at least one pair of active electrodes disposed to one side of a work piece plane, an electrode beam disposed to the other side of said work piece plane, and at least one current bridge mounted on said electrode beam, the improved mounting means for said current bridge comprising a first thrust rod, means pivotally connecting an end of said first thrust rod to said current bridge adjacent one end thereof, a second thrust rod, means pivotally connecting an end of said second thrust rod to said current bridge adjacent the other end thereof, spring support means on each of said first and second thrust rods, locating means on each of said first and second thrust rods, seating means on said beam for each of said locating means, said locating means and said seating means having self-centering complementary contact surfaces, guide means on said electrode support beam for each rod adapted to permit substantial radial movement of said rod, and adjustable spring means for each of said first and second rods adapted to urge said locating means into said seating means, said complimentary self-centering surfaces of said locating means and of said seating means being spherical.
Claim 9
Dependent Claim
202 words
An electric resistance welding machine having at least one pair of active electrodes disposed to one side of a work piece plane, an electrode beam disposed to the other side of said work piece plane, and at least one current bridge mounted on said electrode beam, the improved mounting means for said current bridge comprising a first thrust rod, means pivotally connecting an end of said first thrust rod to said current bridge adjacent one end thereof, a second thrust rod, means pivotally connecting an end of said second thrust rod to said current bridge adjacent the other end thereof, spring support means on each of said first and second thrust rods, locating means on each of said first and second thrust rods, seating means on said beam for each of said locating means, said locating means and said seating means having self-centering complementary contact surfaces, guide means on said electrode support beam for each rod adapted to permit substantial radial movement of said rod, and adjustable spring means for each of said first and second rods adapted to urge said locating means into said seating means, said complimentary self-centering surfaces of said locating means and of said seating means being spherical.
References Cited (Backward Citations)
US3405743A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-19 | 1976-03-20 | 1976-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-19 | 1980-03-20 | 1980-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-19 | 1984-03-20 | 1984-09-19 | $7700.00 | Window Closed / Lapsed |