US3842675A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermometer
Assignee: Scott Technologies Inc
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Filing: 1972-12-26
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Granted: 1974-10-22
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Expires: 1992-12-26
Abstract
Abstract A plug-in thermometer comprising a rotatable and axially shiftable shaft affixed at one of its ends to a balanced circulator indicator drum having a temperature scale marked about its periphery. The drum and shaft are enclosed in a housing having an enlarged portion for the drum and an elongated portion for the shaft. Means are provided in association with the enlarged housing portion whereby the indicator drum temperature scale may be viewed and a temperature reading made with respect to a reference line on the enlarged housing portion. A helical bimetal element is located in the elongated housing portion and surrounds the shaft therein. One end of the bimetal element is affixed to the elongated housing portion and the other end to the shaft. The thermometer is calibrated such that the temperature of the medium surrounding the elongated housing portion will, through the agency of the bimetal element, result in rotation of the shaft and drum until the indicia on the drum scale corresponding to the temperature of the medium is in alignment with the reference line.
Inventors
- 👤 G Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:43
CPC Classifications
G; G01; G01K; G01K5/00; G01K5/48; G01K5/56; G01K5/62
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
273 words
A plug-in thermometer comprising an elongated shaft, an indicator drum fixed to one end of said shaft, an elongated tubular stem housing the opposite end of said shaft, plug means closing said stem at the end thereof remote from said drum, the opposite end of said stem being fixed in a socket formed by a hollow cylindrical body portion in a transversely disposed disc member, a forward end of said body portion having a small central cylindrical bore therein providing an aperture through which said shaft extends to connect to said drum, a cup-like cover member for said drum, said one end of said shaft terminating within said cover member, said disc member being fixed within the open end of said cover member to enclose said drum and provide a bearing means for said shaft; said cup-like member, said disc member, said stem and said plug means being interconnected to provide a sealed enclosure for said drum and said shaft, a bimetallic element mounted within said stem to have one end thereof in connection with said enclosure and its other end in connection with said shaft, said shaft being mounted in a bearing relation to said plug means and said disc member for a balanced rotative movement and axial shift thereof under the influence of said bimetallic element in correspondence with changes in the temperature of its environment, and a temperature scale applied to the periphery of one of said indicator drum and said cup-like cover member and a cooperating indicator applied to the other to provide for a precise readout of the temperature of the environment to which the thermometer is applied.
Claim 2
Dependent Claim
273 words
A plug-in thermometer comprising an elongated shaft, an indicator drum fixed to one end of said shaft, an elongated tubular stem housing the opposite end of said shaft, plug means closing said stem at the end thereof remote from said drum, the opposite end of said stem being fixed in a socket formed by a hollow cylindrical body portion in a transversely disposed disc member, a forward end of said body portion having a small central cylindrical bore therein providing an aperture through which said shaft extends to connect to said drum, a cup-like cover member for said drum, said one end of said shaft terminating within said cover member, said disc member being fixed within the open end of said cover member to enclose said drum and provide a bearing means for said shaft; said cup-like member, said disc member, said stem and said plug means being interconnected to provide a sealed enclosure for said drum and said shaft, a bimetallic element mounted within said stem to have one end thereof in connection with said enclosure and its other end in connection with said shaft, said shaft being mounted in a bearing relation to said plug means and said disc member for a balanced rotative movement and axial shift thereof under the influence of said bimetallic element in correspondence with changes in the temperature of its environment, and a temperature scale applied to the periphery of one of said indicator drum and said cup-like cover member and a cooperating indicator applied to the other to provide for a precise readout of the temperature of the environment to which the thermometer is applied.
Claim 3
Dependent Claim
19 words
The structure claimed in claim 1 wherein said cover member comprises an integral, one-piece member molded of clear plastic.
Claim 4
Dependent Claim
33 words
The structure claimed in claim 1 wherein said temperature scale is carried about the periphery of said indicator drum, said reference line being located on an annular side wall of said cover member.
Claim 5
Dependent Claim
25 words
The structure claimed in claim 1 wherein said cover member, said disc member, said stem and said plug means are joined together in air-tight fashion.
Claim 6
Dependent Claim
71 words
The structure claimed in claim 1 adapted for insertion in an aperture in the wall of a housing, duct, coNduit and the like to measure the temperature of the medium therein, wherein the open end of said cover member is formed with an exterior annular shoulder, and said aperture is so sized as to pass said thermometer until said exterior shoulder comes into abutment with the wall surface about said aperture.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |