JPS5463745A - Automatic anti-dewing device of drums - Google Patents

Automatic anti-dewing device of drums

Info

Publication number
JPS5463745A
JPS5463745A JP13011177A JP13011177A JPS5463745A JP S5463745 A JPS5463745 A JP S5463745A JP 13011177 A JP13011177 A JP 13011177A JP 13011177 A JP13011177 A JP 13011177A JP S5463745 A JPS5463745 A JP S5463745A
Authority
JP
Japan
Prior art keywords
heater
dewing
power source
vtr
switch
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.)
Pending
Application number
JP13011177A
Other languages
Japanese (ja)
Inventor
Shinichi Tanemo
Hiroyuki Kaimai
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Priority to JP13011177A priority Critical patent/JPS5463745A/en
Publication of JPS5463745A publication Critical patent/JPS5463745A/en
Pending legal-status Critical Current

Links

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  • Control Of Temperature (AREA)

Abstract

PURPOSE: To cut off power supply to the heater of a VTR drum other than when power source is OFF and dewing is liable to occur and when power source is ON and dewing has occured by limiting the power supply to the heater with two sets of switches and a dew detection circuit.
CONSTITUTION: Where a switch 8 is held connected to a contact 7c and no power source is applied to a VTR, a switch 8 opens to cut off power supply to a heater 9 when the temperature of the heater 9 is raised above the specified temperature by the power supply through the switch 8. Where power source is OFF, the heater 9 is energized only under the conditions where dewing is likely to occur. In the case when the power source of the VTR is turned ON by connecting the switch 7 to the contact 7b, the heater 9 is energized on condition of dewing by the control circuit through the transistors 12, 10 which conduct when dewing of the drum of the VTR is detected with a dew detection circuit 14 and only when these necessary conditions are satisfied, the heater 9 is energized, whereby wasteful power consumption, the occurrence of overheating of the drum, etc. are prevented.
COPYRIGHT: (C)1979,JPO&Japio
JP13011177A 1977-10-29 1977-10-29 Automatic anti-dewing device of drums Pending JPS5463745A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13011177A JPS5463745A (en) 1977-10-29 1977-10-29 Automatic anti-dewing device of drums

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13011177A JPS5463745A (en) 1977-10-29 1977-10-29 Automatic anti-dewing device of drums

Publications (1)

Publication Number Publication Date
JPS5463745A true JPS5463745A (en) 1979-05-22

Family

ID=15026204

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13011177A Pending JPS5463745A (en) 1977-10-29 1977-10-29 Automatic anti-dewing device of drums

Country Status (1)

Country Link
JP (1) JPS5463745A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58148738U (en) * 1982-03-29 1983-10-06 三洋電機株式会社 VTR condensation removal device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58148738U (en) * 1982-03-29 1983-10-06 三洋電機株式会社 VTR condensation removal device

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