Patent US3775910A successfully refreshed from Google Patents.
US3775910A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Utomatic sizing device for measuring apparatus
Assignee: Tokyo Seimitsu Co Ltd
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Filing: 1971-06-17
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Granted: 1973-12-04
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Expires: 1991-06-17
Abstract
Abstract The automatic sizing device of the present invention provides two amplifiers for low sensitivity range and for high sensitivity range and these amplifiers are used in the following manner. That is, the amplifier for the low sensitivity range is used in normal grinding for detecting a grinding limit for which the grinding speed and the amount of grinding are measured and the whole range of procedure of the grinding to an on size can be observed. During the above-mentioned normal grinding, the grinding speed is changed to the speed for precise grinding. And when the amplifier for high sensitivity range is used in a finishing grinding, a high accuracy for grinding can be obtained, and the signals for a spark out and for an on size can be precisely generated.
Inventors
- 👤 K Kubo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:44
CPC Classifications
B; B24; B24B; B24B49/00; B24B49/02; B24B49/04; B23; B23Q; B23Q15/00; B23Q15/007; B23Q15/18
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
150 words
An automatic sizing device for measuring apparatus comprising, means for detecting a variation of a dimension of a work, converting means for converting said variation into an electric quantity, an output of said converting means being applied via a synchronous rectifier to first amplifier means, an output of said first amplifier means being indicated on an indicator as a variation of a whole range of process of a grinding, an output of said first amplifier means being applied to a single or multiple first trigger circuits, outputs of said first trigger circuits generating a single or multiple control signals for controlling a working condition of said work, said output of said first amplifier means being applied via second amplifier means to a single or multiple second trigger circuits, outputs of said second triggers circuit generating a single or multiple control signals for controlling a working condition near and/or on size.
Claim 2
Dependent Claim
150 words
An automatic sizing device for measuring apparatus comprising, means for detecting a variation of a dimension of a work, converting means for converting said variation into an electric quantity, an output of said converting means being applied via a synchronous rectifier to first amplifier means, an output of said first amplifier means being indicated on an indicator as a variation of a whole range of process of a grinding, an output of said first amplifier means being applied to a single or multiple first trigger circuits, outputs of said first trigger circuits generating a single or multiple control signals for controlling a working condition of said work, said output of said first amplifier means being applied via second amplifier means to a single or multiple second trigger circuits, outputs of said second triggers circuit generating a single or multiple control signals for controlling a working condition near and/or on size.
Claim 3
Dependent Claim
76 words
The automatic sizing device for measuring apparatus according to claim 1, wherein said first and second triggEr circuits each include, respectively, an operational amplifier with a positive feed back and a potentiometer for setting a trigger level of said operational amplifier, an output of said operational amplifier triggered by said level of said potentiometer is applied to a coil of a relay and the current flow in said coil actuates a relay contact of said relay.
Claim 4
Dependent Claim
77 words
The automatic sizing device for measuring apparatus according to claim 1 in which each of said first and each of said second trigger circuits includes means for setting an individual trigger level whereby a control signal is generated only when (1) said first amplifier means output exceeds in value the individual trigger level of a first trigger circuit or (2) said second amplifier means output exceeds in value the individual trigger level of a second trigger circuit.
Claim 5
Dependent Claim
89 words
The automatic sizing device for measuring apparatus according to claim 1 in which each said first trigger circuit includes means for setting a first trigger level, means for providing a working condition control signal when each first trigger level is exceeded by the output level of said first amplifier means, each said second trigger circuit includes means for setting a second trigger level, means for providing an on size working condition control signal when each second trigger level is exceeded by the output level of said second amplifier means.
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) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |