JPS55974A - Low heating power di - Google Patents

Low heating power di

Info

Publication number
JPS55974A
JPS55974A JP715179A JP715179A JPS55974A JP S55974 A JPS55974 A JP S55974A JP 715179 A JP715179 A JP 715179A JP 715179 A JP715179 A JP 715179A JP S55974 A JPS55974 A JP S55974A
Authority
JP
Japan
Prior art keywords
current
circuit
power
coil
current limiting
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
JP715179A
Other languages
Japanese (ja)
Inventor
Kazuyoshi Asada
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP715179A priority Critical patent/JPS55974A/en
Publication of JPS55974A publication Critical patent/JPS55974A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To install power DI in a dust-free airtight unit with its heating value reduced by preventing power DI of the process input device of an electric computer from heating by a current limiting circuit.
CONSTITUTION: Coil 411 is provided to current limitting circuit 11 which controls the current of a power digital signal sent from process 17 with commercial alternating-current power supply 18. Further, this is equipped with rectifier circuit 12 which rectifies an alternating current limited by this current limiting circuit 11 and smoothing circuit 13 which smooths a ripple current rectified by this circuit 12, and the existence of a current smoothed by this circuit 13 is transmitted to electronic computer 18 via insulation type signal transfer circuit 14. Current limiting circuit 11 of this constitution is provided with coil 411 and a current is limited by the impedance of coil 411 to reduce the heating value of current limiting circuit 11, so that power DI23 will be contained in dust-free airtight unit 31.
COPYRIGHT: (C)1980,JPO&Japio
JP715179A 1979-01-26 1979-01-26 Low heating power di Pending JPS55974A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP715179A JPS55974A (en) 1979-01-26 1979-01-26 Low heating power di

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP715179A JPS55974A (en) 1979-01-26 1979-01-26 Low heating power di

Publications (1)

Publication Number Publication Date
JPS55974A true JPS55974A (en) 1980-01-07

Family

ID=11658060

Family Applications (1)

Application Number Title Priority Date Filing Date
JP715179A Pending JPS55974A (en) 1979-01-26 1979-01-26 Low heating power di

Country Status (1)

Country Link
JP (1) JPS55974A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4720720A (en) * 1984-09-18 1988-01-19 Ricoh Company, Ltd. Motor-driven film winder for cameras

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4720720A (en) * 1984-09-18 1988-01-19 Ricoh Company, Ltd. Motor-driven film winder for cameras

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