Patent US3579775A successfully refreshed from Google Patents.
US3579775A
Expired / Lapsed
US
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Tool surface temperature measuring apparatus
Assignee: General Electric Co
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Filing: 1969-04-03
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Granted: 1971-05-25
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Expires: 1989-04-03
Abstract
Abstract Opto-electronic apparatus for hot spot temperature measurement by indirect viewing of a heated surface of a cutting tool through a small diameter hole therein which terminates close to the hot spot surface. A first end of a light guide within the hole views the radiant energy emitted from the heated end surface of the hole during a cutting operation and the remote second end directs the radiant energy to a ratio pyrometer comprising a rotating disc, two infrared filters and a first photocell. The photocell output is a series of electrical pulses of first and second amplitude representing the intensity of the radiant energy in the two spectral bands determined by the filters. Opto-electronic circuitry separates the pulses into two separate pulse trains comprising the first and second amplitude pulses, detects, and compares the peak amplitude of the pulses to obtain a ratio of pulse amplitudes. The hot spot temperature is determined from a known correlation of temperature versus pulse amplitude ratio.
Inventors
- 👤 Gerald J Carlson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:12
CPC Classifications
G; G01; G01J; G01J5/00; G01J5/60; G01J5/602; B; B23; B23Q; B23Q17/00; B23Q17/09; B23Q17/0952; B23Q17/0985; G01J5/02; G01J5/0205; G01J5/04; G01J5/041; G01J5/048; G01J5/08; G01J5/0818; G01J5/0821; G01J5/0865; Y; Y10; Y10T; Y10T407/00; Y10T407/22; Y10T407/2272; Y10T407/2274; Y10T407/28
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
172 words
An improved cutting tool member in combination with temperature measuring apparatus for determining the hot spot temperature of the tool insert part of the cutting tool member, the tool member comprising a toolholder, a tool insert, and a seat positioned intermediate said toolholder and said tool insert, said toolholder, tool insert and seat provided with a centrally located large diameter hole and a pin passing therethrough as a locking means for said tool insert, the improvement comprising a small diameter hole passing in alignment completely through said toolholder and said seat and into said tool insert and terminating in close proximity with the surface of said tool insert including the cutting edge and tool-chip interface and in the region of the hot spot generated during a cutting operation, the small diameter hole in the tool insert having a diameter in the range of 0.020 to 0.100 inch and extending to within a range of 0.005 to 0.020 inch of the surface of said tool insert including the cutting edge and tool-chip interface.
Claim 2
Dependent Claim
172 words
An improved cutting tool member in combination with temperature measuring apparatus for determining the hot spot temperature of the tool insert part of the cutting tool member, the tool member comprising a toolholder, a tool insert, and a seat positioned intermediate said toolholder and said tool insert, said toolholder, tool insert and seat provided with a centrally located large diameter hole and a pin passing therethrough as a locking means for said tool insert, the improvement comprising a small diameter hole passing in alignment completely through said toolholder and said seat and into said tool insert and terminating in close proximity with the surface of said tool insert including the cutting edge and tool-chip interface and in the region of the hot spot generated during a cutting operation, the small diameter hole in the tool insert having a diameter in the range of 0.020 to 0.100 inch and extending to within a range of 0.005 to 0.020 inch of the surface of said tool insert including the cutting edge and tool-chip interface.
Claim 3
Dependent Claim
85 words
The improved cutting tool member set forth in claim 1 wherein said tool insert is provided with a plurality of cutting edges and a plurality of the small diameter holes each terminating in close proximity to a hot spot associated with a cutting edge, each of the small diameter holes in said tool insert being adapted for alignment with the small diameter hole passing completely through said toolholder and said seat upon rotation of said tool insert about the axis of the large diameter hole.
Claim 4
Dependent Claim
41 words
The improved cutting tool member set forth in claim 1 wherein the diameter of the small diameter hole passing completely through said toolholder and said seat is greater than the diameter of the small diameter hole passing into said tool insert.
Claim 5
Dependent Claim
128 words
A tool insert adapted for use with temperature measuring apparatus for determining the hot spot temperature of the tool insert and comprising a tool insert body having a first external surface including a cutting edge, and a plurality of small diameter holes passing through a second external surface of said body and terminating in close proximity with said first surface, at least one of the holes terminating in the region of a hot spot generated during a cutting operation, each hole disposed along a bisect or of the angle defined by the intersection of adjacent side surfaces of said body, each hole having a diameter in the range of 0.020 to 0.100 inch and extending to within a range of 0.005 to 0.020 inch of said first surface.
Claim 6
Dependent Claim
128 words
A tool insert adapted for use with temperature measuring apparatus for determining the hot spot temperature of the tool insert and comprising a tool insert body having a first external surface including a cutting edge, and a plurality of small diameter holes passing through a second external surface of said body and terminating in close proximity with said first surface, at least one of the holes terminating in the region of a hot spot generated during a cutting operation, each hole disposed along a bisect or of the angle defined by the intersection of adjacent side surfaces of said body, each hole having a diameter in the range of 0.020 to 0.100 inch and extending to within a range of 0.005 to 0.020 inch of said first surface.
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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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |