US3734382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for control of welding apparatus
Assignee: Motorola Solutions Inc
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Filing: 1972-04-03
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Granted: 1973-05-22
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Expires: 1992-04-03
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
2026-11-02 06:46
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: 3
Claim 1
Independent Claim
107 words
In a bonding apparatus having an ultrasonic transducer and a bonding head energized by said transducer for moving a first workpiece relative to another under pressure at an ultrasonic rate, a system for detecting the formation of a bond comprising, means coupled to said bonding head and said first workpiece for measuring the electrical resistance between said bonding head and said first workpiece and for detecting a change therein, said change being indicative of the formation of said bond, and switch means connected to said measuring means and responsive thereto for de-energizing said head following a change in electrical resistance between said head and said first workpiece.
Claim 2
Dependent Claim
107 words
In a bonding apparatus having an ultrasonic transducer and a bonding head energized by said transducer for moving a first workpiece relative to another under pressure at an ultrasonic rate, a system for detecting the formation of a bond comprising, means coupled to said bonding head and said first workpiece for measuring the electrical resistance between said bonding head and said first workpiece and for detecting a change therein, said change being indicative of the formation of said bond, and switch means connected to said measuring means and responsive thereto for de-energizing said head following a change in electrical resistance between said head and said first workpiece.
Claim 3
Dependent Claim
35 words
A system as recited in claim 1 wherein said measuring means includes apparatus for operating said switch means to de-energize said head following an increase in electrical resistance between said head and said first workpiece.
References Cited (Backward Citations)
US3212695A
Cited
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 |