US4479726A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for calibrating surface temperature measuring devices
Assignee: Merck and Co Inc
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Filing: 1983-03-28
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Granted: 1984-10-30
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Expires: 2003-03-28
Abstract
Abstract This application for calibrating surface temperature measuring devices is used in chemical processes. The apparatus is portable and comprises a cylindrical metal rod with controlled heating means of accurately known surface temperature.
Inventors
- 👤 Perry J. Townsend
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:48
CPC Classifications
G; G01; G01K; G01K15/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
116 words
Portable apparatus for calibrating thermoelectric surface temperature measuring devices for use with a process control pipe line comprising in combination: (a.) a cylindrical shaped metal calibrator rod selectively mounted to a heater controller; (b.) controlled electrical heating means mounted within said rod; (c.) said heater controller being a proportional output heating controller; (d.) a standard platinum resistance thermometer probe mounted within said metal rod, said probe being connected to said proportional output heating controller; (e.) a second standard platinum resistance probe mounted on the surface of said rod, said probe being electrically connected to a standard temperature read-out meter; whereby a temperature sensor with the process control pipe line is calibrated by said portable calibrating apparatus.
Claim 2
Dependent Claim
116 words
Portable apparatus for calibrating thermoelectric surface temperature measuring devices for use with a process control pipe line comprising in combination: (a.) a cylindrical shaped metal calibrator rod selectively mounted to a heater controller; (b.) controlled electrical heating means mounted within said rod; (c.) said heater controller being a proportional output heating controller; (d.) a standard platinum resistance thermometer probe mounted within said metal rod, said probe being connected to said proportional output heating controller; (e.) a second standard platinum resistance probe mounted on the surface of said rod, said probe being electrically connected to a standard temperature read-out meter; whereby a temperature sensor with the process control pipe line is calibrated by said portable calibrating apparatus.
Claim 3
Dependent Claim
29 words
Apparatus of claim 1 wherein an optional standard platinum resistance probe is mounted within said metal rod, said probe being electrically connected to a standard temperature read out meter.
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) | 1987-10-30 | 1988-04-30 | 1988-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-30 | 1992-04-30 | 1992-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-30 | 1996-04-30 | 1996-10-30 | $7700.00 | Window Closed / Lapsed |