GB1411124A - Electric blanket control circuit - Google Patents

Electric blanket control circuit

Info

Publication number
GB1411124A
GB1411124A GB4850072A GB4850072A GB1411124A GB 1411124 A GB1411124 A GB 1411124A GB 4850072 A GB4850072 A GB 4850072A GB 4850072 A GB4850072 A GB 4850072A GB 1411124 A GB1411124 A GB 1411124A
Authority
GB
United Kingdom
Prior art keywords
arm
contacts
glow
switch
electrodes
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
GB4850072A
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.)
Nortel Networks Ltd
Original Assignee
Northern Electric 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 Northern Electric Co Ltd filed Critical Northern Electric Co Ltd
Publication of GB1411124A publication Critical patent/GB1411124A/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
    • 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
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
    • H02H5/042—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature using temperature dependent resistors
    • H02H5/043—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature using temperature dependent resistors the temperature dependent resistor being disposed parallel to a heating wire, e.g. in a heating blanket
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Resistance Heating (AREA)

Abstract

1411124 Protective arrangements NORTHERN ELECTRIC CO 20 Oct 1972 [26 Oct 1971] 48500/72 Heading H2K An overload protective arrangement for an electric blanket 10 of the kind having a heating element 12 and a sensing wire 14 separated by heat sensitive material, comprises a three electrode glow-discharge switch 26 having its anode cathode path 26d, 26a connected in series with the wire 14 and its control electrode 26c on a temperature sensitive movable arm 26b, a control device connected to the glow-discharge switch and having contacts 20 in series with the heating element 12 and means, e.g. a potentiometer 32, 34 to apply a potential between the cathode and control electrodes 26a, 26c when the blanket is energized. The application of this potential causes a glow-discharge which heats the arm 26b. The arm deflects and electrical connection is made between the electrodes 26a, 26c so that sufficient current flows to heat the bi-metallic element 22 of the control device to close the contacts 20. Current also flows through the ionized gas in the switch 26 and the sensing wire 14. Should overload occur, the heating of the heat sensitive material in the blanket causes this material to provide a low resistance path between the element 12 and wire 14 so that the current through the switch 26 is reduced, the arm 26b cools to break the connection between the electrodes 26a, 26c so that the control device opens its contacts 20.
GB4850072A 1971-10-26 1972-10-20 Electric blanket control circuit Expired GB1411124A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US19209071A 1971-10-26 1971-10-26

Publications (1)

Publication Number Publication Date
GB1411124A true GB1411124A (en) 1975-10-22

Family

ID=22708204

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4850072A Expired GB1411124A (en) 1971-10-26 1972-10-20 Electric blanket control circuit

Country Status (5)

Country Link
US (1) US3673380A (en)
JP (1) JPS4850240A (en)
AU (1) AU4531572A (en)
CA (1) CA932010A (en)
GB (1) GB1411124A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2517133A1 (en) * 1981-11-23 1983-05-27 Sunbeam Corp ELECTRICAL HEATING CIRCUIT AND HEATED COVER

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA793906B (en) * 1978-08-24 1980-07-30 Dreamland Electrical Appliance Heating circuits

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL121571C (en) * 1964-05-06 1966-07-15 Van Der Heem N.V. DEVICE FOR ELECTRICAL HEATING OF AN OBJECT
US3445631A (en) * 1966-03-14 1969-05-20 Indoheem Nv Safety system for an electrically heated blanket
US3356825A (en) * 1966-07-18 1967-12-05 Fieldcrest Mills Inc Electrically heated bedcover and protective circuit
JPS4429551Y1 (en) * 1966-07-19 1969-12-06

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2517133A1 (en) * 1981-11-23 1983-05-27 Sunbeam Corp ELECTRICAL HEATING CIRCUIT AND HEATED COVER

Also Published As

Publication number Publication date
AU4531572A (en) 1974-02-07
CA932010A (en) 1973-08-14
JPS4850240A (en) 1973-07-16
US3673380A (en) 1972-06-27

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees