GB1137567A - Improvements in control systems for electrically heated devices - Google Patents

Improvements in control systems for electrically heated devices

Info

Publication number
GB1137567A
GB1137567A GB42509/66A GB4250966A GB1137567A GB 1137567 A GB1137567 A GB 1137567A GB 42509/66 A GB42509/66 A GB 42509/66A GB 4250966 A GB4250966 A GB 4250966A GB 1137567 A GB1137567 A GB 1137567A
Authority
GB
United Kingdom
Prior art keywords
blanket
heater
temperature
switch
layer
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
GB42509/66A
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of GB1137567A publication Critical patent/GB1137567A/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
    • H05B1/0213—Switches using bimetallic elements
    • 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
    • G05D23/1906—Control of temperature characterised by the use of electric means using an analogue comparing device
    • G05D23/1913—Control of temperature characterised by the use of electric means using an analogue comparing device delivering a series of pulses
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H61/00—Electrothermal relays
    • H01H61/01—Details
    • H01H61/013—Heating arrangements for operating relays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H61/00—Electrothermal relays
    • H01H61/02—Electrothermal relays wherein the thermally-sensitive member is heated indirectly, e.g. resistively, inductively
    • 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
    • H05B3/00—Ohmic-resistance heating
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H05B3/34—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs
    • H05B3/342—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs heaters used in textiles
    • 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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/002—Heaters using a particular layout for the resistive material or resistive elements
    • H05B2203/003—Heaters using a particular layout for the resistive material or resistive elements using serpentine layout
    • 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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/014—Heaters using resistive wires or cables not provided for in H05B3/54
    • 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
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/017—Manufacturing methods or apparatus for heaters

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Textile Engineering (AREA)
  • Control Of Resistance Heating (AREA)
  • Thermally Actuated Switches (AREA)
  • Resistance Heating (AREA)

Abstract

1,137,567. Automatic control of temperature. GENERAL ELECTRIC CO. Sept.23, 1966 |Dec.30, 1965], No. 42509/66. Heading G3R. Control apparatus for an electric blanket 10 having a heater element 26 comprises a device 27 sensitive to the temperature of the blanket, the device having a pair of conductors 28, 29 separated by a layer 30 the resistance of which varies negatively with temperature, the apparatus further including a cyclically operated switch 40 effective to maintain the blanket at a predetermined temperature and a switch 42 which provides ambient temperature compensation. Closure of a switch 33 completes a circuit through contacts 35, 39 of switch 40 and contacts 48, 49 to switch 42 to energize the heater 26 of the blanket 10. A further circuit is made which includes heater 48, conductor 28, heater 44 and conductor 29. Whilst the blanket temperature is below a predetermined value there is little current flow across the layer 30 between the conductors 28, 29 and the effect of the heaters 43, 44 on the bi-metal elements 32, 36 is such that the contacts 35, 39 remain closed with the heater 26 of the blanket energized. Above the predetermined blanket temperature the resistance of the layer 30 assumes such a value that a certain amount of current flows between the conductors 28, 29 across the layer 30. This current flows through the heater 43 whereby the bi-metal element 32 moves to open contacts 35, 39 to de-energize the blanket heater 10. A control knob 51 is provided to allow the user to control the operation of the ambient temperature compensating switch 42.
GB42509/66A 1965-12-30 1966-09-23 Improvements in control systems for electrically heated devices Expired GB1137567A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US517598A US3418454A (en) 1965-12-30 1965-12-30 Electric bedcover overtemperature control system

Publications (1)

Publication Number Publication Date
GB1137567A true GB1137567A (en) 1968-12-27

Family

ID=24060451

Family Applications (1)

Application Number Title Priority Date Filing Date
GB42509/66A Expired GB1137567A (en) 1965-12-30 1966-09-23 Improvements in control systems for electrically heated devices

Country Status (8)

Country Link
US (1) US3418454A (en)
BE (1) BE687891A (en)
CH (1) CH468767A (en)
DE (1) DE1565559B2 (en)
ES (1) ES331628A1 (en)
GB (1) GB1137567A (en)
NL (1) NL155109B (en)
SE (1) SE311200B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3591765A (en) * 1968-06-17 1971-07-06 Dreamland Electrical Appliance Electric blankets
US3814899A (en) * 1972-12-18 1974-06-04 Gen Electric Overtemperature control system
US3890486A (en) * 1973-05-01 1975-06-17 Equipment Dev Corp Aquarium-tank heating control
US4034185A (en) * 1975-09-02 1977-07-05 Northern Electric Company Electric blanket control circuit
US4281237A (en) * 1979-03-05 1981-07-28 Sunbeam Corporation Safety circuit for electric bedcover
NZ192799A (en) * 1979-03-05 1983-11-30 Sunbeam Corp Electric blanket:temperature safety control
US4450496A (en) * 1979-08-16 1984-05-22 Raychem Corporation Protection of certain electrical systems by use of PTC device
EP0026571B1 (en) * 1979-08-16 1985-01-16 RAYCHEM CORPORATION (a California corporation) Protection of electrical systems using ptc devices
US4814583A (en) * 1986-05-02 1989-03-21 Safeway (Australasia) Limited Temperature controller for a waterbed

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2354918A (en) * 1942-08-26 1944-08-01 Gen Electric Temperature control system for electric heating devices
US2510040A (en) * 1947-01-17 1950-05-30 Landers Frary & Clark Electric blanket control
US2565478A (en) * 1949-05-04 1951-08-28 Gen Electric Temperature responsive control circuits
US2704803A (en) * 1951-07-11 1955-03-22 Gen Electric Control circuits for electric blankets

Also Published As

Publication number Publication date
NL6614080A (en) 1967-07-03
DE1565559B2 (en) 1976-12-02
US3418454A (en) 1968-12-24
SE311200B (en) 1969-06-02
BE687891A (en) 1967-03-16
NL155109B (en) 1977-11-15
ES331628A1 (en) 1967-07-01
CH468767A (en) 1969-02-15
DE1565559A1 (en) 1970-05-06

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