US3670568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System of measuring the distribution of reduction rate of metal strips
Assignee: Toshiba Corp
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Filing: 1970-12-29
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Granted: 1972-06-20
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Expires: 1990-12-29
Abstract
Abstract In a system of measuring the distribution of the reduction rate of a metal strip rolled by a rolling mill, a pair of thickness gauges spaced apart with a predetermined spacing and which are reciprocated across the metal strip are provided on the entry and exit sides of the rolling mill and the gauges are controlled such that the same portion of the metal strip is measured on the entry and exit sides of the rolling mill by the pair of thickness gauges.
Inventors
- 👤 Moritada Kubo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:01
CPC Classifications
G; G01; G01B; G01B15/00; G01B15/02; B; B21; B21B; B21B37/00; B21B37/16; B21B37/165; B21B38/00; B21B38/04; G01N; G01N23/00; G01N23/02; G01N23/06; G01N23/083; G01N23/16
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
165 words
A system of measuring the distribution of the reduction rate of a metal strip rolled by a rolling mill comprising a first thickness gauge provided on the entry side of said rolling mill, means for moving said thickness gauge across said metal strip, a second thickness gauge provided on the exit side of said rolling mill, said second thickness gauge being spaced apart from said first thickness gauge by predetermined distances both in the transverse direction and longitudinal direction of said metal strip, means for moving said second thickness gauge across said metal strip, means for controlling the relative position of said gauges so that the portion of said metal strip detected by said first thickness gauge coincides with the portion of said metal strip detected by said second thickness gauge on the exit side, and means responsive to the outputs from said first and second thickness gauges to provide a signal representing the reduction rate of said metal strip rolled by said rolling mill.
Claim 2
Independent Claim
165 words
A system of measuring the distribution of the reduction rate of a metal strip rolled by a rolling mill comprising a first thickness gauge provided on the entry side of said rolling mill, means for moving said thickness gauge across said metal strip, a second thickness gauge provided on the exit side of said rolling mill, said second thickness gauge being spaced apart from said first thickness gauge by predetermined distances both in the transverse direction and longitudinal direction of said metal strip, means for moving said second thickness gauge across said metal strip, means for controlling the relative position of said gauges so that the portion of said metal strip detected by said first thickness gauge coincides with the portion of said metal strip detected by said second thickness gauge on the exit side, and means responsive to the outputs from said first and second thickness gauges to provide a signal representing the reduction rate of said metal strip rolled by said rolling mill.
Claim 3
Dependent Claim
38 words
The system according to claim 1 wherein said gauge position control means comprises means for reciprocating said first and second thickness gauges at predetermined speed across said metal strip while maintaining a predetermined spacing between said thickness gauges.
Claim 4
Dependent Claim
186 words
The system according to claim 1 wherein said position control means comprises first and second potentiometers for detecting the positions of said first and second thickness gauges, respectively, a first differential amplifier for detecting the difference between the outputs from said first and second potentiometers, first and second tachometer generators respectively detecting the travelling speed of said first thickness gauge and the running speed of said metal strip, a first divider for producing a signal representing a set distance between said first and second gauges represented by the ratio between outputs of said first and second tachometer generators, a comparator foR comparing the output from said first divider with the output from said first differential amplifier, a signal generator for generating a signal of a triangular waveform representing the loci of the reciprocating movements of said first and second gauges, a second differential amplifier for producing a signal corresponding to the difference between the output from said signal generator and the output from said first potentiometer, and means responsive to the output from said second differential amplifier to control the position of said first thickness gauge.
Claim 5
Dependent Claim
61 words
The system according to claim 1 which further includes means for comparing the position of said second thickness gauge with the position of said first thickness gauge for correcting the position of said second thickness gauge with respect to the position of the first thickness gauge so as to maintain the spacing between said two thickness gauges at a predetermined spacing.
References Cited (Backward Citations)
US3442104A
Cited
US3474668A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |