JPS56168231A - Safety circuit - Google Patents

Safety circuit

Info

Publication number
JPS56168231A
JPS56168231A JP7306380A JP7306380A JPS56168231A JP S56168231 A JPS56168231 A JP S56168231A JP 7306380 A JP7306380 A JP 7306380A JP 7306380 A JP7306380 A JP 7306380A JP S56168231 A JPS56168231 A JP S56168231A
Authority
JP
Japan
Prior art keywords
circuit
output
fault
comparator
trigger
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.)
Granted
Application number
JP7306380A
Other languages
Japanese (ja)
Other versions
JPS6138491B2 (en
Inventor
Yasukiyo Ueda
Hirokuni Murakami
Takashi Iwasa
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP7306380A priority Critical patent/JPS56168231A/en
Priority to US06/266,592 priority patent/US4485296A/en
Priority to AU70922/81A priority patent/AU528370B2/en
Priority to GB8115781A priority patent/GB2077000B/en
Priority to CA000378514A priority patent/CA1183925A/en
Priority to DE3121550A priority patent/DE3121550C2/en
Publication of JPS56168231A publication Critical patent/JPS56168231A/en
Priority to CA000444604A priority patent/CA1187967A/en
Priority to GB08409653A priority patent/GB2138600B/en
Publication of JPS6138491B2 publication Critical patent/JPS6138491B2/ja
Granted 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

Abstract

PURPOSE:To prevent all of safety circuits from being disabled in operation by providing a delayed pulse generating circuit to monitor always an Hi fault in an output of a comparator circuit. CONSTITUTION:Despite that a temperature detected by a sensor 3 is higher than the set temperature, and a power controlling element 6 does not trigger, the controlling element 6 causes a fault in self trigger, and further, in a period D when an output of a comparator 16 is an Hi fault an output VG of a self-trigger detecting circuit 21 is kept at Low and is not able to cause a breaking circuit 22 to operate, but Hi fault by an output VP of the delayed pulse generating circuit 30 and an output VC of a comparator 16 cause Hi of an output VJ of an AND circuit 31, thus the breaking circuit 22 is actuated through an OR circuit 32.
JP7306380A 1980-05-30 1980-05-30 Safety circuit Granted JPS56168231A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
JP7306380A JPS56168231A (en) 1980-05-30 1980-05-30 Safety circuit
US06/266,592 US4485296A (en) 1980-05-30 1981-05-20 Automatic temperature control device for an electric appliance such as an electric blanket
AU70922/81A AU528370B2 (en) 1980-05-30 1981-05-21 Automatic temperature control device
GB8115781A GB2077000B (en) 1980-05-30 1981-05-22 Automatic temperature control arrangement for an electric appliance such as an electric blanket
CA000378514A CA1183925A (en) 1980-05-30 1981-05-28 Automatic temperature control device for an electric appliance such as an electric blanket
DE3121550A DE3121550C2 (en) 1980-05-30 1981-05-29 Automatic temperature control device for an electrical device
CA000444604A CA1187967A (en) 1980-05-30 1984-01-03 Automatic temperature control device for an electric appliance such as an electric blanket
GB08409653A GB2138600B (en) 1980-05-30 1984-04-13 Automatic temperature control device for an electric appliance such as an electric blanket

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7306380A JPS56168231A (en) 1980-05-30 1980-05-30 Safety circuit

Publications (2)

Publication Number Publication Date
JPS56168231A true JPS56168231A (en) 1981-12-24
JPS6138491B2 JPS6138491B2 (en) 1986-08-29

Family

ID=13507508

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7306380A Granted JPS56168231A (en) 1980-05-30 1980-05-30 Safety circuit

Country Status (1)

Country Link
JP (1) JPS56168231A (en)

Also Published As

Publication number Publication date
JPS6138491B2 (en) 1986-08-29

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