GB641615A - Improvements in temperature control systems - Google Patents

Improvements in temperature control systems

Info

Publication number
GB641615A
GB641615A GB31944/47A GB3194447A GB641615A GB 641615 A GB641615 A GB 641615A GB 31944/47 A GB31944/47 A GB 31944/47A GB 3194447 A GB3194447 A GB 3194447A GB 641615 A GB641615 A GB 641615A
Authority
GB
United Kingdom
Prior art keywords
resistance
temperature
heater
time lag
temperature control
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
GB31944/47A
Inventor
James Antony Hosking Sargeaunt
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.)
British Thermostat Co Ltd
Original Assignee
British Thermostat 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 British Thermostat Co Ltd filed Critical British Thermostat Co Ltd
Priority to GB31944/47A priority Critical patent/GB641615A/en
Publication of GB641615A publication Critical patent/GB641615A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/1927—Control of temperature characterised by the use of electric means using a plurality of sensors
    • G05D23/193—Control of temperature characterised by the use of electric means using a plurality of sensors sensing the temperaure in different places in thermal relationship with one or more spaces
    • G05D23/1931—Control of temperature characterised by the use of electric means using a plurality of sensors sensing the temperaure in different places in thermal relationship with one or more spaces to control the temperature of one space

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Remote Sensing (AREA)
  • Control Of Temperature (AREA)

Abstract

641,615. Automatic temperature control systems. BRITISH THERMOSTAT CO., Ltd. Dec. 3, 1947, No. 31944. [Class 38 (iv)] [Also in Group XXXVI] In a temperature control system employing a Wheatstone bridge circuit 1 the unbalanced output of which regulates a heater or cooler 9 to restore the temperature to a predetermined value, two supplementary or anticipatory temperature-sensitive resistances 11, 11a disposed in close relation, are connected in adjacent sides of the bridge so that they do not normally influence the balance. The resistance 11 responds directly to the surrounding temperature, whereas the resistance 11a is arranged to respond to this temperature only after a predetermined time lag. Thus, for air flowing in a duct 10 past the heater 9 to a chamber 3, the heater is initially controlled by the resistance 11 but after the time lag when the resistance of 11a becomes equal to that of 11 the control is passed to the main control element 2. An anticipatory effect may be obtained by placing the resistances 11, 11a before the heater (Fig. 2, not shown). The time lag of resistance 11a is made adjustable by variable vents in the shroud 12 of the resistance (Fig. 3, not shown), (see Group XXXVI).
GB31944/47A 1947-12-03 1947-12-03 Improvements in temperature control systems Expired GB641615A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB31944/47A GB641615A (en) 1947-12-03 1947-12-03 Improvements in temperature control systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB31944/47A GB641615A (en) 1947-12-03 1947-12-03 Improvements in temperature control systems

Publications (1)

Publication Number Publication Date
GB641615A true GB641615A (en) 1950-08-16

Family

ID=10330710

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31944/47A Expired GB641615A (en) 1947-12-03 1947-12-03 Improvements in temperature control systems

Country Status (1)

Country Link
GB (1) GB641615A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2849275A1 (en) * 1978-11-14 1980-06-04 Bosch Gmbh Robert CONTROL UNIT FOR AIR-CONDITIONING THE INTERIOR OF VEHICLES, IN PARTICULAR MOTOR VEHICLES

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2849275A1 (en) * 1978-11-14 1980-06-04 Bosch Gmbh Robert CONTROL UNIT FOR AIR-CONDITIONING THE INTERIOR OF VEHICLES, IN PARTICULAR MOTOR VEHICLES

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