US3621185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding system
Assignee: Boeing North American Inc
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Filing: 1969-05-12
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Granted: 1971-11-16
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Expires: 1989-05-12
Abstract
Abstract The invention pertains to MIG-welding apparatus wherein the actual speed of a welding wire is compared with the feeding rate of the feeding means and conditions at the arc, to compensate for slippage between the feeding means and welding wire thereby improving the response to changes in welding conditions.
Inventors
- 👤 William F Iceland
- 👤 Donald R Lien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:31
CPC Classifications
B; B23; B23K; B23K9/00; B23K9/12; B23K9/124
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
179 words
In a welding system having a weld-wire, a workpiece to be welded, means for melting the weld-wire onto the workpiece, including a means for feeding the weld-wire toward the workpiece, the improvement comprising: means for sensing the temperature of said workpiece and producing a temperature signal indicative of the temperature being sensed; means for sensing the feed-rate of said weld-wire and producing a feed-rate signal indicative of the feed rate being sensed; means for adding said temperature signal and said feed-rate signal to produce a composite weld-control signal, and means for controlling said means for feeding the weld-wire in response to said composite weld-control signal to cause the welding temperature on said workpiece to be maintained substantially constant; means for sensing the driving rate at which said means for feeding tends to drive said weld-wire and producing a driving signal indicative of the driving rate said feeding means tends to drive said weld-wire; and said adding means also adds said driving signal to the other two signals to cause said composite signal to be a combination of three signals.
Claim 2
Dependent Claim
179 words
In a welding system having a weld-wire, a workpiece to be welded, means for melting the weld-wire onto the workpiece, including a means for feeding the weld-wire toward the workpiece, the improvement comprising: means for sensing the temperature of said workpiece and producing a temperature signal indicative of the temperature being sensed; means for sensing the feed-rate of said weld-wire and producing a feed-rate signal indicative of the feed rate being sensed; means for adding said temperature signal and said feed-rate signal to produce a composite weld-control signal, and means for controlling said means for feeding the weld-wire in response to said composite weld-control signal to cause the welding temperature on said workpiece to be maintained substantially constant; means for sensing the driving rate at which said means for feeding tends to drive said weld-wire and producing a driving signal indicative of the driving rate said feeding means tends to drive said weld-wire; and said adding means also adds said driving signal to the other two signals to cause said composite signal to be a combination of three signals.
Claim 3
Dependent Claim
61 words
In the combination of claim 1 wherein: said feeding means comprises a motor for engaging said weld-wire to move the weld-wire; said means for sensing the driving rate at which said motor tends to move said weld-wire comprises a tachometer means for sensing the speed of said motor so that said driving signal is indicative of the speed of the motor.
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) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |