GB1077803A - Improvements in or relating to feedback control systems - Google Patents

Improvements in or relating to feedback control systems

Info

Publication number
GB1077803A
GB1077803A GB42999/65A GB4299965A GB1077803A GB 1077803 A GB1077803 A GB 1077803A GB 42999/65 A GB42999/65 A GB 42999/65A GB 4299965 A GB4299965 A GB 4299965A GB 1077803 A GB1077803 A GB 1077803A
Authority
GB
United Kingdom
Prior art keywords
space
temperature
actuator
heater
variable resistor
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
GB42999/65A
Inventor
Dwight Charles Lewis
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.)
Penn Controls Inc
Original Assignee
Penn Controls Inc
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 Penn Controls Inc filed Critical Penn Controls Inc
Priority to GB42999/65A priority Critical patent/GB1077803A/en
Publication of GB1077803A publication Critical patent/GB1077803A/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
    • 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
    • G05D23/1919—Control of temperature characterised by the use of electric means characterised by the type of controller
    • G05D23/1921—Control of temperature characterised by the use of electric means characterised by the type of controller using a thermal motor

Landscapes

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

Abstract

1,077,803. Automatic temperature control of enclosed spaces. PENN CONTROLS Inc. Oct. 11, 1965, No. 42999/65. Heading G3R. A system for controlling the temperature of an enclosed space comprises an electro-thermal actuator 18 operating on the control means 51 of a furnace supplying heat to the space, the energization of the heater 11 in the actuator being under the control of a silicon controlled rectifier 12, the firing points of the rectifier 12 being controllable by the output of a bridge 40 which includes a thermistor 50 responsive to the actual temperature of the space being heated and a variable resistor 48 for setting the desired temperature of the space, the bridge including a second variable resistor 41 the slider of which is operated by the actuator 18. Thus any variation from the set temperature of the space will cause the impedance of a transistor 31 to vary so altering the time constant of the charging circuit of a capacitor 20 whereby the firing points of the silicon controlled rectifier 12 will be controlled to energize the heater 11 of the actuator 18 to restore the temperature of the space to the set value.
GB42999/65A 1965-10-11 1965-10-11 Improvements in or relating to feedback control systems Expired GB1077803A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB42999/65A GB1077803A (en) 1965-10-11 1965-10-11 Improvements in or relating to feedback control systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB42999/65A GB1077803A (en) 1965-10-11 1965-10-11 Improvements in or relating to feedback control systems

Publications (1)

Publication Number Publication Date
GB1077803A true GB1077803A (en) 1967-08-02

Family

ID=10426900

Family Applications (1)

Application Number Title Priority Date Filing Date
GB42999/65A Expired GB1077803A (en) 1965-10-11 1965-10-11 Improvements in or relating to feedback control systems

Country Status (1)

Country Link
GB (1) GB1077803A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106817780A (en) * 2017-01-18 2017-06-09 广东美的厨房电器制造有限公司 Temperature-control circuit and electric heating equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106817780A (en) * 2017-01-18 2017-06-09 广东美的厨房电器制造有限公司 Temperature-control circuit and electric heating equipment

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