US3641431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for inspecting and adjusting cutter blades
Assignee: Gleason Works
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Filing: 1968-10-01
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Granted: 1972-02-08
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Expires: 1988-10-01
Abstract
Abstract A cutter inspection device and a method of operating the device for determining cutter blade settings by measuring an air gap is disclosed. The device comprises an electronic measuring unit, with a capacitance probe that measures an air gap having a value dependent upon a blade setting. The air gap is formed between the capacitance probe and the cutter blade for some blade setting measurements and in other blade setting measurements, the air gap is formed between the capacitance probe and a contact element in contact with a surface or edge of a cutter blade.
Inventors
- 👤 Robert F Pigage
- 👤 Arthur B Ryan
- 👤 Robert E Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:29
CPC Classifications
B; B23; B23Q; B23Q17/00; B23Q17/22; B23Q17/2216; B23Q17/2225; G; G01; G01B; G01B7/00; G01B7/001; G01B7/14
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
246 words
A method of inspecting a plurality of cutter blades on a cutting tool for blade-to-blade truing purposes wherein each said blade includes a leading cutting edge and a relieved side face which tapers from said cutting edge to the back of the blade, said method comprising: positioning said cutter blades for movement with respect to a capacitive probe thereby defining an air gap therebetween having a width dependent upon the position of one of said blades with respect to said capacitive probe, moving a first master one of said blades past said capacitive probe by rotating said cutting tool relative to said probe so that each successive cutter blade approaches the probe from back to front whereby the probe first senses the rear of said relieved sideface of each cutter blade, the capacitance building up to a peak which drops off relatively fast when the cutting edge of the blade is passed, measuring and noting a minimum indicated average reference air gap for the master blade during said moving step, local effects due to small surface irregularities on said cutter blades being minimized by always measuring an instantaneous average air gap, moving the other of said blades past said capacitive probe from back to front in the same manner employed for the master blade, and measuring and noting the minimum indicated average air gaps respectively associated with each of said other blades if materially different than said reference air gap to thereby determine any untrued blades.
Claim 2
Independent Claim
246 words
A method of inspecting a plurality of cutter blades on a cutting tool for blade-to-blade truing purposes wherein each said blade includes a leading cutting edge and a relieved side face which tapers from said cutting edge to the back of the blade, said method comprising: positioning said cutter blades for movement with respect to a capacitive probe thereby defining an air gap therebetween having a width dependent upon the position of one of said blades with respect to said capacitive probe, moving a first master one of said blades past said capacitive probe by rotating said cutting tool relative to said probe so that each successive cutter blade approaches the probe from back to front whereby the probe first senses the rear of said relieved sideface of each cutter blade, the capacitance building up to a peak which drops off relatively fast when the cutting edge of the blade is passed, measuring and noting a minimum indicated average reference air gap for the master blade during said moving step, local effects due to small surface irregularities on said cutter blades being minimized by always measuring an instantaneous average air gap, moving the other of said blades past said capacitive probe from back to front in the same manner employed for the master blade, and measuring and noting the minimum indicated average air gaps respectively associated with each of said other blades if materially different than said reference air gap to thereby determine any untrued blades.
Claim 3
Dependent Claim
77 words
A method as in claim 1 further comprising the steps of: individually adjusting the positioning of the said untrued ones of said blades relative to the cutting tool in a direction to compensate for the noted material air gap differences, and moving at least the adjusted ones of said blades past said reference means again and noting the minimum indicated air gaps if materially different than said reference air gap thereby determining if further adjustment is necessary.
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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |