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ES481662A1 - Electric bedcover - Google Patents

Electric bedcover

Info

Publication number
ES481662A1
ES481662A1 ES481662A ES481662A ES481662A1 ES 481662 A1 ES481662 A1 ES 481662A1 ES 481662 A ES481662 A ES 481662A ES 481662 A ES481662 A ES 481662A ES 481662 A1 ES481662 A1 ES 481662A1
Authority
ES
Spain
Prior art keywords
resistor
layer
conductors
cause
regulator
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
ES481662A
Other languages
Spanish (es)
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.)
Felten and Guilleaume Austria AG
Felten and Guilleaume AG
Original Assignee
Felten and Guilleaume Austria AG
Felten and Guilleaume AG
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 Felten and Guilleaume Austria AG, Felten and Guilleaume AG filed Critical Felten and Guilleaume Austria AG
Publication of ES481662A1 publication Critical patent/ES481662A1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
    • H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
    • H02H3/33—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
    • H02H3/332—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers with means responsive to dc component in the fault current

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Resistance Heating (AREA)
  • Breakers (AREA)
  • Control Of Temperature (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

An electric bedcover comprises a temperature regulator incorporating a thermoresponsive device 32, such as a bimetallic element or (Figure 3, not shown) a thermistor controlling a triac, a resistor 50 mounted for heat dissipation to the device 32, and an elongated flexible over-temperature sensor 52, which comprises a pair of conductors 54, 56 spaced by a layer 58 of material having a negative temperature coefficient of resistance and which extends through the blanket. A circuit branch comprising the resistor 50, the conductors 54, 56 and the layer 58 in series is connected so as to conduct little current except when some part of the layer 58 is over-heated, when it conducts sufficient current to cause the resistor 50 to dissipate sufficient heat to cause the thermoresponsive device 32 to terminate delivery of power to the heater, thus overriding normal operation of the regulator.
ES481662A 1979-01-22 1979-06-19 Electric bedcover Expired ES481662A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT43379A AT357625B (en) 1979-01-22 1979-01-22 DC CURRENT SENSITIVE CURRENT CIRCUIT BREAKER

Publications (1)

Publication Number Publication Date
ES481662A1 true ES481662A1 (en) 1980-01-16

Family

ID=3490474

Family Applications (1)

Application Number Title Priority Date Filing Date
ES481662A Expired ES481662A1 (en) 1979-01-22 1979-06-19 Electric bedcover

Country Status (8)

Country Link
AT (1) AT357625B (en)
BE (1) BE877057A (en)
CH (1) CH645758A5 (en)
ES (1) ES481662A1 (en)
FR (1) FR2447093A1 (en)
GB (1) GB2045023B (en)
IT (1) IT1207084B (en)
NL (1) NL7905943A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4547658A (en) * 1984-06-13 1985-10-15 Sunbeam Corporation Multiple heat fusing wire circuit for underblankets
GB2174853A (en) * 1985-03-27 1986-11-12 Tech Mirage Ind Limited Safety circuit for electric heater
US4707686A (en) * 1986-04-03 1987-11-17 General Electric Company Over temperature sensing system for power cables
US4677281A (en) * 1986-11-04 1987-06-30 Fieldcrest Cannon, Inc. Electric heating apparatus with integrated solid state comfort control and overheat protection
GB2334389B (en) * 1998-02-16 2002-03-06 Dreamland Appliances Ltd Electrically heated panel apparatus

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1763366A1 (en) * 1968-05-15 1972-03-30 Ritz Messwandler Gmbh Compensated current transformer core for quick protection
DE1803811A1 (en) * 1968-10-18 1970-06-04 Ritz Messwandler Gmbh Intermediate current transformer for >> quick protection <<
CH600551A5 (en) * 1976-09-18 1978-06-15 Maier Carl Cmc & Cie Ag Release for electrical switch

Also Published As

Publication number Publication date
ATA43379A (en) 1979-12-15
IT1207084B (en) 1989-05-17
AT357625B (en) 1980-07-25
GB2045023B (en) 1983-02-23
GB2045023A (en) 1980-10-22
BE877057A (en) 1979-10-15
CH645758A5 (en) 1984-10-15
IT8047655A0 (en) 1980-01-21
FR2447093A1 (en) 1980-08-14
NL7905943A (en) 1980-07-24

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19970303