US3768010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for detecting irregularities in the shape of a workpiece during machining
Assignee: Finike Italiana Marposs SpA
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Filing: 1971-12-21
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Granted: 1973-10-23
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Expires: 1991-12-21
Abstract
Abstract Apparatus for detecting irregularities in the shape of a workpiece during machining, comprising a first capacitive memory means for memorizing the maximum dimension of the workpiece at an adjustable predetermined time, second capacitive memory means for memorizing the minimum dimension of the workpiece at the same time and means for determining the difference between the memorized maximum and minimum dimensions.
Inventors
- 👤 M Pozetti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:07
CPC Classifications
G; G01; G01B; G01B7/00; G01B7/28
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
167 words
An apparatus for operating on signals representing measured irregularities in the shape of a workpiece being machined, comprising: first and second memory means for respectively storing signals representing the measured maximum and minimum dimensions of said workpiece; difference signal means coupled to said first and second memory means for providing a signal representing the difference between said measured maximum and minimum dimensions; further storage means for storing the output of said difference signal means; zeroing means for cyclically zeroing said first and second memory means and for thereafter permitting them to store further signals representing further measured maximum and minimum dimensions of said workpiece; and further zeroing means for cyclically controlling the electrical connection between said difference signal means and said further storage means and for electrically connecting said difference signal means and said further storage means to each other at a preset time after a set of maximum and minimum dimensions of said workpiece have been measured and stored in said first and second memory means.
Claim 2
Independent Claim
167 words
An apparatus for operating on signals representing measured irregularities in the shape of a workpiece being machined, comprising: first and second memory means for respectively storing signals representing the measured maximum and minimum dimensions of said workpiece; difference signal means coupled to said first and second memory means for providing a signal representing the difference between said measured maximum and minimum dimensions; further storage means for storing the output of said difference signal means; zeroing means for cyclically zeroing said first and second memory means and for thereafter permitting them to store further signals representing further measured maximum and minimum dimensions of said workpiece; and further zeroing means for cyclically controlling the electrical connection between said difference signal means and said further storage means and for electrically connecting said difference signal means and said further storage means to each other at a preset time after a set of maximum and minimum dimensions of said workpiece have been measured and stored in said first and second memory means.
Claim 3
Dependent Claim
42 words
The apparatus according to claim 1, further comprising high-pass filter means coupled to the inputs of said first and second memory means for passing substantially only the portion of a measurement signal which corresponds to the irregularities of the workpiece being measured.
Claim 4
Dependent Claim
44 words
The apparatus according to claim 2, further comprising a pair of rectifying elements coupled in parallel and interposed between said difference signal means and said further storage means, said further zeroing means being coupled to said rectifying elements for controlling the electrical biasing thereof.
Claim 5
Dependent Claim
33 words
The apparatus according to claim 3, further comprising indicating means coupled to the output of said further storage means for indicating the value of the difference between said measured maximum and minimum dimensions.
References Cited (Backward Citations)
US3525040A
Cited
US3593133A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |