US3685209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for trimming electrical resistors
Assignee: COMCO SUPPLY Inc
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Filing: 1970-08-20
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Granted: 1972-08-22
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Expires: 1990-08-20
Abstract
Abstract An apparatus for guiding the powdered abrasive cutting nozzle upon a micro-electronic circuit board to decrease the cross sectional area of an electrical conducting strip thereon, the apparatus employing a variable speed linkage assembly to effect movement of the circuit board into association with the abrasive cutting nozzle, an electrical circuit connected through a probe assembly to measure the electrical resistance of the trimmed conducting strip upon the circuit board, the probe assembly being movable between a conducting position and a nonconducting position.
Inventors
- 👤 Arthur H Lambert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:36
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/22; H01C17/24; H01C17/245
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
63 words
An electrical resistor trimming apparatus comprising: first means for decreasing the cross sectional area of an electrical resistor; second means for fixedly locating the electrical resistor on a support; third means for moving the electrical resistor into and out of association with said first means, said third means including variable speed structure to move the support and the electrical resistor at different velocities.
Claim 2
Dependent Claim
63 words
An electrical resistor trimming apparatus comprising: first means for decreasing the cross sectional area of an electrical resistor; second means for fixedly locating the electrical resistor on a support; third means for moving the electrical resistor into and out of association with said first means, said third means including variable speed structure to move the support and the electrical resistor at different velocities.
Claim 3
Dependent Claim
153 words
An electrical resistor trimming apparatus comprising: first means for decreasing the cross sectional area of an electrical resistor; second means for fixedly locating the electrical resistor on a support; third means for moving the support and the electrical resistor into and out of association with said first means, said third means including variable speed structure; and said variable speed structure includes an actuating arm movable by an actuating force, said actuating arm connected to actuate a first linkage arm and a second linkage arm, said first linkage arm movable with respect to said second linkage arm and causing the electrical resistor to move a first distance toward said first means, said second linkage arm movable subsequent to the completion of movement of said first linkage arm, said second linkage arm causes the electrical resistor to move a second distance toward said first means, said second distance being substantially less than said first distance.
Claim 4
Dependent Claim
153 words
An electrical resistor trimming apparatus comprising: first means for decreasing the cross sectional area of an electrical resistor; second means for fixedly locating the electrical resistor on a support; third means for moving the support and the electrical resistor into and out of association with said first means, said third means including variable speed structure; and said variable speed structure includes an actuating arm movable by an actuating force, said actuating arm connected to actuate a first linkage arm and a second linkage arm, said first linkage arm movable with respect to said second linkage arm and causing the electrical resistor to move a first distance toward said first means, said second linkage arm movable subsequent to the completion of movement of said first linkage arm, said second linkage arm causes the electrical resistor to move a second distance toward said first means, said second distance being substantially less than said first distance.
Claim 5
Dependent Claim
50 words
Apparatus as defined in claim 2 wherein: said actuating arm movable a third distance during movement of said first linkage arm said first distance, said actuating arm movable a fourth distance during movement of said second linkage arm said second distance, said fourth distance being greater than said third distance.
Claim 6
Dependent Claim
59 words
Apparatus as defined in claim 1 wherein: said different velocities comprise a first velocity and a second velocity, said first velocity being substantially less than said second velocity, said first velocity occurring when said electrical resistor is located adjacent said first means, said second velocity occurring when said electrical resistor is spaced a substantial distance from said first means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |