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GB255977A - Improvements in and relating to temperature controlling devices for electric furnaces - Google Patents

Improvements in and relating to temperature controlling devices for electric furnaces

Info

Publication number
GB255977A
GB255977A GB1225025A GB1225025A GB255977A GB 255977 A GB255977 A GB 255977A GB 1225025 A GB1225025 A GB 1225025A GB 1225025 A GB1225025 A GB 1225025A GB 255977 A GB255977 A GB 255977A
Authority
GB
United Kingdom
Prior art keywords
resistances
relating
resistance
temperature controlling
controlling devices
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
GB1225025A
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.)
SAUL PAYMAN
British Thomson Houston Co Ltd
Original Assignee
SAUL PAYMAN
British Thomson Houston 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 SAUL PAYMAN, British Thomson Houston Co Ltd filed Critical SAUL PAYMAN
Priority to GB1225025A priority Critical patent/GB255977A/en
Publication of GB255977A publication Critical patent/GB255977A/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
    • H05B1/0208—Switches actuated by the expansion or evaporation of a gas or liquid
    • 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

Landscapes

  • Control Of Resistance Heating (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)

Abstract

255,977. British Thomson-Houston Co., Ltd., and Payman, S. May 11, 1925. Heating systems. -In a thermostat control of an electric furnace, the main and auxiliary resistance windings 1, 2 are connected in parallel through relay switches 8, 9 between the mains 7. A thermostatic switch 4 has two operative positions, 5 when the furnace temperature is below a predetermined point, and 6 when it is above a predetermined higher point. In the position 5, both relays 8, 9 are closed, so that both resistances 1, 2 are heated. In the position 6, both relays 8, 9 are open, and both resistances 1, 2 are open-circuited. In an intermediate position, relay 9 only is closed, and resistance 1 only is heated. In a modification, a single heating resistance is used in series with two external resistances which are in parallel, one or both of these being placed in circuit as described above. Specifications 774/03. [Class 64, Heating], and 3544/08 are referred to.
GB1225025A 1925-05-11 1925-05-11 Improvements in and relating to temperature controlling devices for electric furnaces Expired GB255977A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1225025A GB255977A (en) 1925-05-11 1925-05-11 Improvements in and relating to temperature controlling devices for electric furnaces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1225025A GB255977A (en) 1925-05-11 1925-05-11 Improvements in and relating to temperature controlling devices for electric furnaces

Publications (1)

Publication Number Publication Date
GB255977A true GB255977A (en) 1926-08-05

Family

ID=10001109

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1225025A Expired GB255977A (en) 1925-05-11 1925-05-11 Improvements in and relating to temperature controlling devices for electric furnaces

Country Status (1)

Country Link
GB (1) GB255977A (en)

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