US3849099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scanning apparatus for measuring glass temperatures
Assignee: Pilkington North America Inc
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Filing: 1973-11-15
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Granted: 1974-11-19
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Expires: 1993-11-15
Abstract
Abstract An apparatus for traversing a pyrometer across the top surface of a ribbon of glass to observe its temperature profile as it is conveyed through an annealing lehr and wherein the roof of the lehr is provided with a transversely elongated, vertically extending labyrinth passageway opening into the interior of the lehr. The pyrometer, positioned within the passageway with its scanning head substantially flush with the ceiling of the lehr, is mounted for movement in a rectilinear path along the elongation of the passageway by a carriage movably mounted for reciprocation externally of and along the top opening of the passageway. A flexible closure disposed within and extending along the elongation of the passageway together with the labyrinth path thereof effectively seals the interior of the lehr from the outside atmosphere, but yet permits transverse movement of the pyrometer with the passageway.
Inventors
- 👤 R Maltby
- 👤 Connell T O
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:55
CPC Classifications
C; C03; C03B; C03B25/00; C03B25/04; C03B25/06; C03B25/08; G; G01; G01J; G01J5/00; G01J5/0022
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
97 words
In a scanning apparatus for observing the temperature profile across an article as it is conveyed through a lehr, including a roof in said lehr and a pyrometer for observing said temperature profile, the improvement comprising: a. a transversely elongated passageway extending through said roof; b. a frame mounted on said roof adjacent said passageway; c. pyrometer support means projecting into said passageway and movably mounted on said frame for reciprocation along the elongation of said passageway; and d. closure means for continuously sealing said support means in said passageway as said support means is moved therealong.
Claim 2
Dependent Claim
97 words
In a scanning apparatus for observing the temperature profile across an article as it is conveyed through a lehr, including a roof in said lehr and a pyrometer for observing said temperature profile, the improvement comprising: a. a transversely elongated passageway extending through said roof; b. a frame mounted on said roof adjacent said passageway; c. pyrometer support means projecting into said passageway and movably mounted on said frame for reciprocation along the elongation of said passageway; and d. closure means for continuously sealing said support means in said passageway as said support means is moved therealong.
Claim 3
Dependent Claim
53 words
A scanning apparatus for observing the temperature profile across an article as claimed in claim 1, wherein said passageway has a labyrinth path and said closure means is a flexible curtain which depends from said frame across said passageway and co-operates with said labyrinth path to close said passageway around said support means.
Claim 4
Dependent Claim
38 words
A scanning apparatus for observing the temperature profile across an article as claimed in claim 1, wherein said pyrometer support means includes a chamber and means for circulating a cooling medium through said chamber for cooling said pyrometer.
Claim 5
Dependent Claim
38 words
A scanning apparatus for observing the temperature profile of an article as claimed in claim 2, including side access means opening into said labyrinth passageway for permitting said pyrometer support means to be moved externally of said lehr.
Claim 6
Dependent Claim
32 words
A scanning apparatus for observing the temperature profile of an article as claimed in claim 4, wherein said access means comprises a door movable from a closed position to an open position.
Claim 7
Dependent Claim
50 words
A scanning apparatus for observing the temperature profile of an article as claimed in claim 1, wherein said frame comprises a pair of spaced parallel tubular members, a conduit connecting said tubular members together, and means for circulating a cooling medium through said tubular members for cooling said scanning apparatus.
Claim 8
Dependent Claim
29 words
A scanning apparatus for observing the temperature profile of an article as claimed in claim 6, including means for moving said support means along the elongation of said passageway.
Claim 9
Dependent Claim
45 words
A scanning apparatus for observing the temperature profile of an article as claimed in claim 7, wherein said moving means includes a guide rail affixed to each tubular member and said support means includes wheels rollable along said guide rails and a reversible drive means.
Claim 10
Dependent Claim
40 words
A scanning apparatus for observing the temperature profile of an article as claimed in claim 8, wherein said reversible drive means includes separate automatically operated limit switches for controlling the reciprocal motion of said support means by said drive means.
Claim 11
Dependent Claim
31 words
A scanninG apparatus for observing the temperature profile of an article as claimed in claim 2, wherein said flexible curtain is a heat-resistant cloth which is draped over said support means.
References Cited (Backward Citations)
US3479172A
Cited
US3744985A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-18 | 1978-05-20 | 1978-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-18 | 1982-05-20 | 1982-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-18 | 1986-05-20 | 1986-11-19 | $7700.00 | Window Closed / Lapsed |