US4644832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for monitoring saw blade stability and controlling work feed rate on circular saw and bandsaw machines
Assignee: RAFF TERRY AS TRUSTEE OF MAIN CHILDREN'S TRUST
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Filing: 1985-03-21
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Granted: 1987-02-24
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Expires: 2005-03-21
Abstract
Abstract A position sensing transducer senses the lateral movement of the saw blade resulting from variable operating conditions. These sensed values are displayed on instrumentation for use by the saw machine operator, and are also used to automatically control work feed rates and/or rim speed of the saw blade. These automatica corrections and/or compensations maintain lateral movement of the saw blade within established limits. Optimized work feed rates and superior cutting accuracy result from this precise automatic control.
Inventors
- 👤 H. Reid Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:38
CPC Classifications
B; B23; B23D; B23D59/00; B23D59/001; B23D59/002; B23D47/00; B23D47/005; B23D59/008; Y; Y10; Y10T; Y10T83/00; Y10T83/141; Y10T83/647; Y10T83/6475
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
64 words
A method of controlling vibration in saw blades comprising: detecting lateral movement of saw blade; using signal conditioning means to provide an electrical signal proportional to said saw blade movement; calculating referenced mean displacement, peak to peak, and displacement RMS signals; comparing the conditioned signals to assigned levels; and controlling the speed of the saw blade responsive to said comparison by predetermined program logic.
Claim 2
Independent Claim
64 words
A method of controlling vibration in saw blades comprising: detecting lateral movement of saw blade; using signal conditioning means to provide an electrical signal proportional to said saw blade movement; calculating referenced mean displacement, peak to peak, and displacement RMS signals; comparing the conditioned signals to assigned levels; and controlling the speed of the saw blade responsive to said comparison by predetermined program logic.
Claim 3
Dependent Claim
13 words
A method according to claim 1 whereby critical saw blade vibrations are by-passed.
Claim 4
Independent Claim
62 words
A method of controlling vibration is saw blades comprising: detecting lateral movement of saw blade; using signal conditioning means to provide an electrical signal proportional to said saw blade movement; calculating referenced mean displacement, peak to peak, and displacement RMS signals; comparing the conditioned signals to assigned levels; and controlling the work feed rate responsive to said comparison by predetermined program logic.
Claim 5
Independent Claim
62 words
A method of controlling vibration is saw blades comprising: detecting lateral movement of saw blade; using signal conditioning means to provide an electrical signal proportional to said saw blade movement; calculating referenced mean displacement, peak to peak, and displacement RMS signals; comparing the conditioned signals to assigned levels; and controlling the work feed rate responsive to said comparison by predetermined program logic.
Claim 6
Dependent Claim
13 words
A method according to claim 3 whereby critical saw blade vibrations are by-passed.
References Cited (Backward Citations)
US4087801A
Cited
US4358974A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-02-23 | 1990-08-25 | 1991-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-23 | 1994-08-25 | 1995-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-23 | 1998-08-25 | 1999-02-24 | $7700.00 | Window Closed / Lapsed |