GB905213A - Automatic temperature control system - Google Patents

Automatic temperature control system

Info

Publication number
GB905213A
GB905213A GB2221359A GB2221359A GB905213A GB 905213 A GB905213 A GB 905213A GB 2221359 A GB2221359 A GB 2221359A GB 2221359 A GB2221359 A GB 2221359A GB 905213 A GB905213 A GB 905213A
Authority
GB
United Kingdom
Prior art keywords
temperature
heater
controlled
energization
auxiliary
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
GB2221359A
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.)
FRANK STUART ALVEY
BP PLC
Original Assignee
FRANK STUART ALVEY
BP PLC
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 FRANK STUART ALVEY, BP PLC filed Critical FRANK STUART ALVEY
Priority to GB2221359A priority Critical patent/GB905213A/en
Publication of GB905213A publication Critical patent/GB905213A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0202—Switches
    • H05B1/0211—Switches using the expansion of an electric conductive liquid

Landscapes

  • Control Of Temperature (AREA)

Abstract

905,213. Automatic temperature-control. BRITISH PETROLEUM CO. Ltd., and ALVEY, F. S. Sept. 15, 1960 [June 29, 1959], No. 22213/59. Class 38 (4). In an automatic temperature-control system the energization of a main electric heater is switched from high to low or off by a device responsive to a temperature controlled by the heater and the energization of an auxiliary electric heater for the temperature-responsive device is derived through a transformer, the supply to which is switched in parallel with that to the main heater. In Fig. 2, the temperature of a medium heated by an electric heater element 9 is thermostatically controlled by a contact making mercury thermometer 11 controlling the supply to the heater through contacts 3 of a relay 5. An auxiliary lowvoltage heater 10, supplied through a transformer 12, the energization of which is also controlled by relay contacts 3, is associated with thermometer 11 to reduce the temperature differential. In a modification, the temperature is controlled by relay contacts shortcircuiting a resistor in series with the heater. Use of expansion, bimetallic, thermocouple or temperature-variable resistance type temperature responsive devices is referred to. In the case of an expansion helix the auxiliary heat may be applied by passing current through the helix.
GB2221359A 1959-06-29 1959-06-29 Automatic temperature control system Expired GB905213A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2221359A GB905213A (en) 1959-06-29 1959-06-29 Automatic temperature control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2221359A GB905213A (en) 1959-06-29 1959-06-29 Automatic temperature control system

Publications (1)

Publication Number Publication Date
GB905213A true GB905213A (en) 1962-09-05

Family

ID=10175753

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2221359A Expired GB905213A (en) 1959-06-29 1959-06-29 Automatic temperature control system

Country Status (1)

Country Link
GB (1) GB905213A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6935572B1 (en) 2004-11-02 2005-08-30 Lewis T. Smole Temperature differential eliminator
US7878801B2 (en) 2000-09-21 2011-02-01 Align Technology, Inc. Systems and methods for dental appliance compliance indication
US10842601B2 (en) 2008-06-12 2020-11-24 Align Technology, Inc. Dental appliance
US11559374B2 (en) 2004-09-24 2023-01-24 Align Technology, Inc. Release agent receptacle

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7878801B2 (en) 2000-09-21 2011-02-01 Align Technology, Inc. Systems and methods for dental appliance compliance indication
US11559374B2 (en) 2004-09-24 2023-01-24 Align Technology, Inc. Release agent receptacle
US6935572B1 (en) 2004-11-02 2005-08-30 Lewis T. Smole Temperature differential eliminator
US10842601B2 (en) 2008-06-12 2020-11-24 Align Technology, Inc. Dental appliance

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