JPS5478548A - High-frequency heater - Google Patents

High-frequency heater

Info

Publication number
JPS5478548A
JPS5478548A JP14674277A JP14674277A JPS5478548A JP S5478548 A JPS5478548 A JP S5478548A JP 14674277 A JP14674277 A JP 14674277A JP 14674277 A JP14674277 A JP 14674277A JP S5478548 A JPS5478548 A JP S5478548A
Authority
JP
Japan
Prior art keywords
circuit
door
level
pulse
buzzes
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
JP14674277A
Other languages
Japanese (ja)
Other versions
JPS6021477B2 (en
Inventor
Shigeki Ueda
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 JP14674277A priority Critical patent/JPS6021477B2/en
Publication of JPS5478548A publication Critical patent/JPS5478548A/en
Publication of JPS6021477B2 publication Critical patent/JPS6021477B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Control Of High-Frequency Heating Circuits (AREA)
  • Electric Ovens (AREA)

Abstract

PURPOSE: To quickly detect the seizure of wrong contact of a door switch, by using a logical circuit.
CONSTITUTION: The door switch 1 applies an L-level signal to a control circuit when a door is opened but applies an H-level signal when the door is closed. Inputs to a NOR circuit 7 are delayed by integration circuits 8, 9. The NOR circuit 7 has an H level only when the inputs are both at an L level. One-shot pulse is generated in response to the opening or closing of the door and is supplied to an AND circuit 11 through an OR circuit 10. The AND circuit 11 makes an AND of the pulse with a synchronizing signal from an oscillator 12 made of a multivibrator. A buzzer 13 buzzes only while the pulse C has an H level. Thus, the buzzer 13 buzzes at each time of opening and closing of the door to inform that the door switch 1 is normal.
COPYRIGHT: (C)1979,JPO&Japio
JP14674277A 1977-12-06 1977-12-06 High frequency heating device Expired JPS6021477B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14674277A JPS6021477B2 (en) 1977-12-06 1977-12-06 High frequency heating device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14674277A JPS6021477B2 (en) 1977-12-06 1977-12-06 High frequency heating device

Publications (2)

Publication Number Publication Date
JPS5478548A true JPS5478548A (en) 1979-06-22
JPS6021477B2 JPS6021477B2 (en) 1985-05-28

Family

ID=15414558

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14674277A Expired JPS6021477B2 (en) 1977-12-06 1977-12-06 High frequency heating device

Country Status (1)

Country Link
JP (1) JPS6021477B2 (en)

Also Published As

Publication number Publication date
JPS6021477B2 (en) 1985-05-28

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