US3763545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for control of welding apparatus
Assignee: Motorola Solutions Inc
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Filing: 1973-01-26
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Granted: 1973-10-09
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Expires: 1993-01-26
Abstract
Abstract A system for improving the quality of a bond obtained from an ultrasonic welding apparatus includes a resistance measuring circuit for monitoring the electrical resistance between the wire to be bonded and the bonding head. The welding apparatus is automatically de-activated upon an increase in said resistance, the increase being indicative of bond formation. De-activating the bonding apparatus immediately following bond formation prevents the application of further ultrasonic energy from weakening the bond.
Inventors
- 👤 K Spanjer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:11
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/10; H; H10; H10W; H10W72/00; H10W72/071; H10W72/0711; H10W72/07141; H10W72/075; H10W72/07531; H10W72/07532; H10W72/07533; H10W72/50; H10W72/531; H10W72/5363; H10W72/551; H10W72/552; H10W72/5522; H10W72/5524
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
89 words
In the method of welding wherein a first workpiece is moved relative to another under pressure by means of a bonding head for producing a bond between the workpieces, and the formation of the bond is detected for de-activating the bonding head upon the formation of said bond, the method of detecting the formation of said bond comprising the steps of, measuring the electrical resistance between said workpiece and said head, and detecting a change in said electrical resistance, said change in resistance occurring upon formation of said bond.
Claim 2
Dependent Claim
89 words
In the method of welding wherein a first workpiece is moved relative to another under pressure by means of a bonding head for producing a bond between the workpieces, and the formation of the bond is detected for de-activating the bonding head upon the formation of said bond, the method of detecting the formation of said bond comprising the steps of, measuring the electrical resistance between said workpiece and said head, and detecting a change in said electrical resistance, said change in resistance occurring upon formation of said bond.
Claim 3
Dependent Claim
26 words
The method as recited in claim 1 wherein the step of detecting said change in resistance includes the step of detecting an increase in said resistance.
Claim 4
Independent Claim
54 words
The method of welding comprising the steps of, moving a first workpiece relative to another under pressure at an ultrasonic rate by means of a bonding head, measuring the electrical resistance between said workpiece and said bonding head, detecting a change in said electrical resistance, and de-activating said head upon detection of said change.
Claim 5
Independent Claim
54 words
The method of welding comprising the steps of, moving a first workpiece relative to another under pressure at an ultrasonic rate by means of a bonding head, measuring the electrical resistance between said workpiece and said bonding head, detecting a change in said electrical resistance, and de-activating said head upon detection of said change.
Claim 6
Dependent Claim
26 words
The method as recited in claim 3 wherein the step of detecting said change in resistance includes the step of detecting an increase in said resistance.
References Cited (Backward Citations)
US3150624A
Cited
US3212695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |