GB1186971A - Improvements in or relating to Integrating Temperature Difference Indicators. - Google Patents

Improvements in or relating to Integrating Temperature Difference Indicators.

Info

Publication number
GB1186971A
GB1186971A GB1327368A GB1327368A GB1186971A GB 1186971 A GB1186971 A GB 1186971A GB 1327368 A GB1327368 A GB 1327368A GB 1327368 A GB1327368 A GB 1327368A GB 1186971 A GB1186971 A GB 1186971A
Authority
GB
United Kingdom
Prior art keywords
temperature
block
switch
fuel
heater
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1327368A
Inventor
James Stewart Johnston
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Emerson Process Management Ltd
Original Assignee
Rosemount Engineering Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rosemount Engineering Co Ltd filed Critical Rosemount Engineering Co Ltd
Priority to GB1327368A priority Critical patent/GB1186971A/en
Publication of GB1186971A publication Critical patent/GB1186971A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K5/00—Measuring temperature based on the expansion or contraction of a material
    • G01K5/48—Measuring temperature based on the expansion or contraction of a material the material being a solid
    • G01K5/56—Measuring temperature based on the expansion or contraction of a material the material being a solid constrained so that expansion or contraction causes a deformation of the solid
    • G01K5/62—Measuring temperature based on the expansion or contraction of a material the material being a solid constrained so that expansion or contraction causes a deformation of the solid the solid body being formed of compounded strips or plates, e.g. bimetallic strip
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K3/00—Thermometers giving results other than momentary value of temperature
    • G01K3/02—Thermometers giving results other than momentary value of temperature giving means values; giving integrated values
    • G01K3/04—Thermometers giving results other than momentary value of temperature giving means values; giving integrated values in respect of time

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Of Combustion (AREA)

Abstract

1,186,971. Indicating integrated values of temperature. ROSEMOUNT ENG. CO. Ltd. Feb.4, 1969 [March 19, 1968], No. 13273/68. Heading G1D. Apparatus for indicating how an ambient temperature has differed from a pre-selected temperature as an integral of temperature difference with respect to time comprises a metal block 10 exposed to the ambient temperature, a temperature sensor in the form of a bi-metallic switch 12 which is located in a hole 11 in the block 10 and which closes below the pre-selected temperature, a heater 14 disposed in a further hole 13 in the block 10 and controlled by the switch 12, so that the block is maintained at the pre-selected temperature and an indicator 16, preferably in the fan of a synchronous motor connected to a cyclometer type indicator, for indicating the energy consumed by the heater, this being directly proportional to the difference in temperature between the ambient temperature and the pre-selected temperature, integrated with respect to time. The apparatus is used in the determination of the amount of fuel likely to have been used by a heating installation over a period of time assuming that as tempertures fall, more fuel will be used. However, since there will generally be a temperature at which a maximum rate of fuel consumption is reached and below which no extra fuel is used, the heater 14 may have a limited heat output so that it can only produce a limited rise in temperature of the block 10. In place of the switch 12, a suitably connected resistance thermistor may be used, if desired. Also, since there may be times when the heating installation is not in use, a tuning device to switch off the indicator during these times may be used.
GB1327368A 1968-03-19 1968-03-19 Improvements in or relating to Integrating Temperature Difference Indicators. Expired GB1186971A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1327368A GB1186971A (en) 1968-03-19 1968-03-19 Improvements in or relating to Integrating Temperature Difference Indicators.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1327368A GB1186971A (en) 1968-03-19 1968-03-19 Improvements in or relating to Integrating Temperature Difference Indicators.

Publications (1)

Publication Number Publication Date
GB1186971A true GB1186971A (en) 1970-04-08

Family

ID=10019982

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1327368A Expired GB1186971A (en) 1968-03-19 1968-03-19 Improvements in or relating to Integrating Temperature Difference Indicators.

Country Status (1)

Country Link
GB (1) GB1186971A (en)

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees