Patent US3791635A successfully refreshed from Google Patents.
US3791635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detection of radiant energy emitting from a moving web of metal
Assignee: National Steel Corp
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Filing: 1972-05-22
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Granted: 1974-02-12
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Expires: 1992-05-22
Abstract
Abstract A metal web treating line includes rolls defining a travel path and a radiation pyrometer aimed at the travel path and into the wedge shaped space formed by the relationship of a roll and the travel path. Such aiming eliminates errors produced by changes in emissivity and extraneous radiation thereby providing reliable temperature measurements suitable for process control.
Inventors
- 👤 C Schwestka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:42
CPC Classifications
G; G01; G01J; G01J5/00; G01J5/0022; C; C21; C21D; C21D9/00; C21D9/52; C21D9/54; C21D9/56
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
73 words
Apparatus for detecting the radiant energy from a moving web of metal in heated condition, comprising at least one roll means defining a point in a pass line for the web, which pass line is tangent to a point on the roll means, radiant energy detector means aimed at the plane of the pass line and into a wedge shaped space formed by the relationship of the pass line and said roll means.
Claim 2
Dependent Claim
73 words
Apparatus for detecting the radiant energy from a moving web of metal in heated condition, comprising at least one roll means defining a point in a pass line for the web, which pass line is tangent to a point on the roll means, radiant energy detector means aimed at the plane of the pass line and into a wedge shaped space formed by the relationship of the pass line and said roll means.
Claim 3
Dependent Claim
106 words
The apparatus of claim 1 wherein the wedge shaped space is defined by a roll means, an imaginary plane tangent to the roll means and normal to the plane of the pass line, and the plane of the pass line between where the imaginary plane intersects it and where the plane of the pass line is tangent to the roll means; and wherein the detector means is aimed at the plane of the pass line at a location closer to where the plane of the pass line is tangent to the roll means than to where the imaginary plane intersects the plane of the pass line.
Claim 4
Dependent Claim
37 words
The apparatus of claim 1 wherein the aiming of the detector means is characterized by a line of sight, and the acute angle between the line of sight and the pass line is less than about 40*.
Claim 5
Dependent Claim
22 words
The apparatus of claim 3 wherein the acute angle between the line of sight and the pass line is less than 35*.
Claim 6
Dependent Claim
12 words
The apparatus of claim 3, including means to vary said acute angle.
Claim 7
Dependent Claim
95 words
Apparatus for treating a moving web of metal in heated condition, comprising at leat one roll means defining a point in a pass line for the web, which pass line is tangent to a point on the roll means, radiant energy detector means aimed at the plane of the pass linE and into the wedge shaped space formed by the relationship of the pass line and said roll means, chamber means housing at least a portion of said pass line, control means responsive to said detector means to control the temperature within the chamber means.
Claim 8
Dependent Claim
95 words
Apparatus for treating a moving web of metal in heated condition, comprising at leat one roll means defining a point in a pass line for the web, which pass line is tangent to a point on the roll means, radiant energy detector means aimed at the plane of the pass linE and into the wedge shaped space formed by the relationship of the pass line and said roll means, chamber means housing at least a portion of said pass line, control means responsive to said detector means to control the temperature within the chamber means.
Claim 9
Dependent Claim
86 words
Metallurgical apparatus, comprising chamber means having an inlet and an outlet, at least one roll means within said chamber means defining a point in a path of travel for heated strip moving through said chamber means from the inlet to the outlet, radiant energy detector means aimed at the travel path and into a wedge shaped space formed by the relationship of the travel path and said roll means, control means responsive to said detector means, heater means within said chamber responsive to said control means.
Claim 10
Dependent Claim
86 words
Metallurgical apparatus, comprising chamber means having an inlet and an outlet, at least one roll means within said chamber means defining a point in a path of travel for heated strip moving through said chamber means from the inlet to the outlet, radiant energy detector means aimed at the travel path and into a wedge shaped space formed by the relationship of the travel path and said roll means, control means responsive to said detector means, heater means within said chamber responsive to said control means.
Claim 11
Independent Claim
75 words
A method for sensing the temperature of a mvoing web of metal which is in contact with the roll using a radiation pyrometer whereby inaccuracies due to emissivity and extraneous radiation are eliminated, comprising aiming said radiation pyromter at the web of metal between where said web is tangent to the roll and where an imaginary plane tangent to the roll and normal to the plane of the web intersects the plane of the web.
Claim 12
Independent Claim
75 words
A method for sensing the temperature of a mvoing web of metal which is in contact with the roll using a radiation pyrometer whereby inaccuracies due to emissivity and extraneous radiation are eliminated, comprising aiming said radiation pyromter at the web of metal between where said web is tangent to the roll and where an imaginary plane tangent to the roll and normal to the plane of the web intersects the plane of the web.
Claim 13
Dependent Claim
27 words
The method of claim 8 wherein the radiation pyrometer is aimed along a sight line forming an acute angle with the web of less than about 40*.
Claim 14
Dependent Claim
14 words
The method of claim 9 wherein said acute angle is less than about 35*.
Claim 15
Dependent Claim
35 words
The method of claim 8 wherein the pyrometer is aimed at the web closer to where said web is tangent to the roll than to where the imaginary plane intersects the plane of the web.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |