GB1030583A - Improvements in and relating to a switching circuit for an electrically heated blanket - Google Patents

Improvements in and relating to a switching circuit for an electrically heated blanket

Info

Publication number
GB1030583A
GB1030583A GB15157/65A GB1515765A GB1030583A GB 1030583 A GB1030583 A GB 1030583A GB 15157/65 A GB15157/65 A GB 15157/65A GB 1515765 A GB1515765 A GB 1515765A GB 1030583 A GB1030583 A GB 1030583A
Authority
GB
United Kingdom
Prior art keywords
resistor
blanket
valve
supply
heater
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
GB15157/65A
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.)
Van Der Heem BV
Original Assignee
Van Der Heem BV
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 Van Der Heem BV filed Critical Van Der Heem BV
Publication of GB1030583A publication Critical patent/GB1030583A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G05D23/2451—Details of the regulator
    • G05D23/2453—Details of the regulator using discharge tubes
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B5/00—Anti-hunting arrangements
    • G05B5/01—Anti-hunting arrangements electric
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Resistance Heating (AREA)
  • Control Of Temperature (AREA)

Abstract

1,030,583. Automatic temperature control of electric blankets. VAN DER HEEN N.V. April 9, 1965 [May 6, 1964], No. 15157/65. Heading G3R. An electric blanket control system includes one or more negative temperature coefficient resistor (a) for sensing the blanket temperature, the system being arranged so that the blanket heater is disconnected should the connections to the negative temperature coefficient resistor (s) become interrupted. An electric blanket comprises a heater 1, the supply of energy to which is controlled by the normally open contacts of a relay 2, the operating coil of which is shunted by a capacitor 7 and is connected in the anode circuit of a discharge valve 8. A D.C. supply is obtained from the A.C. supply 3 by elements 4, 5, 6 across which supply are connected two potentiometers; one comprising a resistor 10 and the negative temperature coefficient resistor 11 which senses the blanket temperature and the other including two resistors 13, 14 and a potentiometer 12. The first control electrode of the valve 8 is connected to the junction of resistors 10, 11 and to the cathode of the valve by a grid leak resistor 9 whilst the second control electrode is connected to the slider of the potentiometer 12, by means of which the blanket temperature can be set. Alternatively either resistor 10, 13, 14 may be made adjustable for this purpose. Thus should the sensing resistor 11 become opencircuited the first control electrode of the valve 8 is biased negative thus disabling the valve 8 to de-energize relay 2 and the heater 1.
GB15157/65A 1964-05-06 1965-04-09 Improvements in and relating to a switching circuit for an electrically heated blanket Expired GB1030583A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6405084A NL121571C (en) 1964-05-06 1964-05-06 DEVICE FOR ELECTRICAL HEATING OF AN OBJECT

Publications (1)

Publication Number Publication Date
GB1030583A true GB1030583A (en) 1966-05-25

Family

ID=62044203

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15157/65A Expired GB1030583A (en) 1964-05-06 1965-04-09 Improvements in and relating to a switching circuit for an electrically heated blanket

Country Status (4)

Country Link
US (1) US3361941A (en)
FR (1) FR1436258A (en)
GB (1) GB1030583A (en)
NL (1) NL121571C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3445631A (en) * 1966-03-14 1969-05-20 Indoheem Nv Safety system for an electrically heated blanket

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3673381A (en) * 1971-10-26 1972-06-27 Northern Electric Co Thermostatless blanket control circuit
USRE28656E (en) * 1971-10-26 1975-12-16 Thermostatless blanket control circuit
US3673380A (en) * 1971-10-26 1972-06-27 Northern Electric Co Glow switch relay for blanket overheat control switch

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2429453A (en) * 1946-03-21 1947-10-21 Gen Electric Bridge control for electric blankets
US2831130A (en) * 1956-03-16 1958-04-15 Bill Jack Scient Instr Co Electronic pulsing device
US2892917A (en) * 1958-09-29 1959-06-30 Gen Electric Automatic temperature control system
US2958008A (en) * 1959-08-14 1960-10-25 Chemstrand Corp Control circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3445631A (en) * 1966-03-14 1969-05-20 Indoheem Nv Safety system for an electrically heated blanket

Also Published As

Publication number Publication date
NL6405084A (en) 1965-11-08
US3361941A (en) 1968-01-02
NL121571C (en) 1966-07-15
FR1436258A (en) 1966-04-22

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