US3785091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for detecting the speed of removal of the chips in a grinding machine
Assignee: Finike Italiana Marposs SpA
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Filing: 1972-01-19
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Granted: 1974-01-15
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Expires: 1992-01-19
Abstract
Abstract A device for detecting the speed of removal of the chip from a workpiece in a grinder comprising a measuring member adapted to detect at each moment the dimension of the part being machined, and characterized by first memory means for memorizing a first dimension of the piece being worked, second memory means for memorizing the second dimension of the piece at a predetermined period of time from the detection of said first dimension, and means for forming the difference between the two memorized values, said difference representing the quantity of material removed in said predetermined interval of time.
Inventors
- 👤 M Pozzetti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:24
CPC Classifications
B; B24; B24B; B24B49/00; B24B49/02; B24B49/04; B23; B23Q; B23Q15/00; B23Q15/007; B23Q15/013; B23Q15/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
129 words
Apparatus for determining the speed of chip or stock removal in a grinding machine provided with measuring means for supplying electrical signals responsive to the dimension of a piece being machined, comprising: first memory means for storing a first signal representing a first measured dimension of said workpiece measured by said measuring means, second memory means for storing a second signal representing a second measured dimension of said workpiece measured by said measuring means a pre-determined time interval after said first dimension has been measured, means for obtaining a difference signal which is the difference between the first and second signals stored in said first and second memory means, third memory means for storing said difference signal, and control circuit for updating said first, second and third memory means.
Claim 2
Dependent Claim
129 words
Apparatus for determining the speed of chip or stock removal in a grinding machine provided with measuring means for supplying electrical signals responsive to the dimension of a piece being machined, comprising: first memory means for storing a first signal representing a first measured dimension of said workpiece measured by said measuring means, second memory means for storing a second signal representing a second measured dimension of said workpiece measured by said measuring means a pre-determined time interval after said first dimension has been measured, means for obtaining a difference signal which is the difference between the first and second signals stored in said first and second memory means, third memory means for storing said difference signal, and control circuit for updating said first, second and third memory means.
Claim 3
Dependent Claim
73 words
The apparatus according to claim 1, wherein said first and second memory means respectively store signals representing the maximum values of said first and second dimensions measured by said measuring means in first and second periods of time sufficient to permit said measuring member to explore the entire surface of the piece, said difference signal being independent of the point of removal of the measurement and corresponding to the quantity of material removed.
Claim 4
Dependent Claim
63 words
The apparatus according to claim 2, wherein each of said first and second memory means comprises a capacitor, an operational amplifier having an output connected to said capacitor for charging same, and a diode in series with said operational amplifier and said capacitor; and further comprising means to cyclically discharge said capacitor prior to sToring a new maximum value signal in said capacitor.
Claim 5
Dependent Claim
41 words
The apparatus according to claim 3, further comprising means connected to the input of each said operational amplifier for controlling the period of time during which said first and second signals are applied to said first and second memory means, respectively.
Claim 6
Dependent Claim
44 words
The apparatus according to claim 1, further comprising comparing means for comparing said difference signal and an adjustable predetermined signal; control means controlling the cycle of the machining of said workpiece; and means applying the output of said comparing means to said control means.
Claim 7
Dependent Claim
14 words
The apparatus according to claim 1, further comprising means for indicating said difference signal.
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) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |