Patent US3668501A successfully refreshed from Google Patents.
US3668501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for generating compensating control means
Assignee: OPT OMECHANISMS Inc
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Filing: 1970-12-02
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Granted: 1972-06-06
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Expires: 1990-12-02
Abstract
Abstract The invention comprises automatic means for generating compensating means for long lead screw and racks such as those used in precision machine tools. The workpiece lead screw or rack is mounted parallel to the cam to be cut. A movable platform mounts a milling cutter. The platform is also connected to the lead screw by a nut or to the rack by a pinion. Angular motion of the lead screw or pinion is measured and transmitted to a computer. The linear motion of the platform is measured with an interferometer. The two measurements are compared in the computer and the output is fed to a servo mechanism which controls compensating means. A chart or printed or other type tape output is provided.
Inventors
- 👤 Anwar K Chitayat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:22
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/404; B; B23; B23C; B23C3/00; B23C3/08; B23Q; B23Q23/00; G05B19/19; G05B19/21; G05B19/23; G05B19/231; G05B2219/00; G05B2219/30; G05B2219/37; G05B2219/37297; G05B2219/37304; G05B2219/41; G05B2219/41069
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
109 words
Apparatus for generating compensation means for a precision machine drive element comprising, a movable work means connected to said drive element, means to develop data indicative of the desired displacement of said movable work means by said drive element, laser interferometer means to measure the actual displacement of said movable work means produced by said drive element, and means for continuously generating compensating means for said drive element, including means responsive to said measuring means and said data developing means for continuously comparing the desired and actual displacements, and means connected to said comparison means for continuously generating a recording of said compensation as a function of said comparison.
Claim 2
Dependent Claim
109 words
Apparatus for generating compensation means for a precision machine drive element comprising, a movable work means connected to said drive element, means to develop data indicative of the desired displacement of said movable work means by said drive element, laser interferometer means to measure the actual displacement of said movable work means produced by said drive element, and means for continuously generating compensating means for said drive element, including means responsive to said measuring means and said data developing means for continuously comparing the desired and actual displacements, and means connected to said comparison means for continuously generating a recording of said compensation as a function of said comparison.
Claim 3
Dependent Claim
13 words
Apparatus as in claim 1 wherein the machine drive element comprises a rack.
Claim 4
Dependent Claim
14 words
Apparatus as in claim 1 wherein the machine drive element comprises a lead screw.
Claim 5
Dependent Claim
18 words
Apparatus as in claim 1 wherein environmental correction is included in the means for measuring the actual displacement.
Claim 6
Dependent Claim
17 words
Apparatus as in claim 1 wherein the output of said measuring means is converted to digital form.
Claim 7
Dependent Claim
18 words
Apparatus as in claim 1 wherein the actual displacement means comprise an interferometer, counter and environmental correction circuit.
Claim 8
Dependent Claim
17 words
Apparatus as in claim 1 wherein the comparison means include a differencing circuit, with a digital output.
Claim 9
Dependent Claim
26 words
Apparatus as in claim 1 wherein said data developing means include a shaft encoder connected to said drive element and a multiplier connected to said encoder.
Claim 10
Dependent Claim
11 words
Apparatus as in claim 1 wherein said recording is a chart.
Claim 11
Dependent Claim
11 words
Apparatus as in claim 1 wherein said recording is a tape.
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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |