Patent US3930159A successfully refreshed from Google Patents.
US3930159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for measuring the cooling time of welds
Assignee: Centre de Recherches Metallurgiques CRM ASBL
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Filing: 1974-08-12
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Granted: 1975-12-30
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Expires: 1994-08-12
Abstract
Abstract A thermocouple is longitudinally slidable in the barrel of a holder in the form of a pistol. The thermocouple is projected partially from the end of the barrel when a photo-electric cell carried by the pistol detects that a weld whose cooling time is to be measured has reached a predetermined temperature. The sighting axis of the cell intersects the axis of the thermocouple beyond the end of the barrel. An electronic circuit connected to the output of the thermocouple is adapted to start and stop a time meter at respective upper and lower given temperature values.
Inventors
- 👤 Freddy Antoine Marquet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:23
CPC Classifications
G; G01; G01J; G01J5/00; G01J5/02; G01J5/0014; G01J5/0018; G01J5/0037; G01J5/004; G01J5/04; G01J5/08; G01J5/0846; G01K; G01K1/00; G01K1/14; G01K1/146; G01K7/00; G01K7/02; G01K7/025; G01J5/0265
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
178 words
A device for measuring the cooling time of a weld, comprising: a holder in the form of a pistol having a barrel and a butt; a thermocouple housed in the barrel and being slidable along a longitudinal axis of the barrel so as to extend from the end of the barrel; a photo-electric cell sensitive to thermal radiation from the fused metal of a weld, the cell being mounted on the holder and having an axis of sight which intersects the said longitudinal axis in front of the barrel; means for projecting the thermocouple partially from the barrel along the said longitudinal axis; a first electronic control circuit adapted to actuate the said projecting means when the temperature corresponding to the thermal radiation sensed by the cell reaches a predetermined limit, the control circuit being housed in the butt; and a second electronic control circuit, which is connected to an output of the thermocouple and which is adapted to start and stop a time meter at respective upper and lower given temperature values as measured by the thermocouple.
Claim 2
Independent Claim
178 words
A device for measuring the cooling time of a weld, comprising: a holder in the form of a pistol having a barrel and a butt; a thermocouple housed in the barrel and being slidable along a longitudinal axis of the barrel so as to extend from the end of the barrel; a photo-electric cell sensitive to thermal radiation from the fused metal of a weld, the cell being mounted on the holder and having an axis of sight which intersects the said longitudinal axis in front of the barrel; means for projecting the thermocouple partially from the barrel along the said longitudinal axis; a first electronic control circuit adapted to actuate the said projecting means when the temperature corresponding to the thermal radiation sensed by the cell reaches a predetermined limit, the control circuit being housed in the butt; and a second electronic control circuit, which is connected to an output of the thermocouple and which is adapted to start and stop a time meter at respective upper and lower given temperature values as measured by the thermocouple.
Claim 3
Dependent Claim
25 words
A device as claimed in claim 1, in which the said projecting means comprises releasable detent means for acting on a spring holding the thermocouple.
Claim 4
Dependent Claim
49 words
A device as claimed in claim 1, in which the barrel comprises two parts, a lower part which is integral with the remainder of the pistol and serves as a housing for the thermocouple, and an upper part which is detachable and serves to cover and protect the thermocouple.
Claim 5
Dependent Claim
25 words
A device as claimed in claim 1, in which the parts of the pistol covering the thermocouple and covering the sensitive cell are of brass.
Claim 6
Dependent Claim
40 words
A device as claimed in claim 1, in which the pistol includes a pneumatic piston which is displaceable parallel to the said longitudinal axis of the barrel and which guides the thermocouple during projection and deadens recoil of the pistol.
Claim 7
Dependent Claim
21 words
A device as claimed in claim 1, in which the second electronic circuit is housed in the butt of the pistol.
Claim 8
Dependent Claim
22 words
A device as claimed in claim 1, further comprising manual control means mounted on the pistol for actuating the said projecting means.
Claim 9
Dependent Claim
27 words
A device as claimed in claim 1, further comprising a magnetic base having a concave shape and serving as a seat for the end of the butt.
Claim 10
Dependent Claim
31 words
A device as claimed in claim 8, in which the end of the butt which is to rest on the magnetic base is made of steel and is spherical in shape.
Claim 11
Dependent Claim
16 words
A device as claimed in claim 1, in which the cell is sensitive to infra-red radiation.
Claim 12
Dependent Claim
15 words
A device as claimed in claim 1, in which the butt is made of aluminium.
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) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |