JPS54100722A - Electric circuit for camera - Google Patents

Electric circuit for camera

Info

Publication number
JPS54100722A
JPS54100722A JP755578A JP755578A JPS54100722A JP S54100722 A JPS54100722 A JP S54100722A JP 755578 A JP755578 A JP 755578A JP 755578 A JP755578 A JP 755578A JP S54100722 A JPS54100722 A JP S54100722A
Authority
JP
Japan
Prior art keywords
point
resistor
scr
terminal
points
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
JP755578A
Other languages
Japanese (ja)
Other versions
JPS6238690B2 (en
Inventor
Akira Takahashi
Shinichiro Koshiishi
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP755578A priority Critical patent/JPS54100722A/en
Priority to US06/006,225 priority patent/US4305648A/en
Priority to DE2942435A priority patent/DE2942435C2/en
Priority to DE2954054A priority patent/DE2954054C2/en
Priority to DE2902891A priority patent/DE2902891C2/en
Publication of JPS54100722A publication Critical patent/JPS54100722A/en
Priority to US06/152,764 priority patent/US4375912A/en
Publication of JPS6238690B2 publication Critical patent/JPS6238690B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To prevent an erroneous display and the idle trip of a s-utter by providing both a switching element having a holding fuction and warning means to be controlled by said element.
CONSTITUTION: In a timer circuit, a point B is connected through a resistor R1 with a point E, and the main terminal of a comparator COMP is connected with points A and E. Moreover, a switch SW1 has two contacts 1 and 2, the former being connected with the negative terminal of a DC power source EB whereas the latter being connected with the point E. A variable resistor VR2 has its both terminals connected between the points A and E and its sliding terminal connected through a capacitor C2 with the inverted input terminal of the comparator. A deflection warning LED is connected through a resistor R2 between the points A and E. An SCR has its gate connected through a resistor R3 with the output terminal of the COMP. Still moreover, a capacitor C3 is connected between the gate of the SCR and the point E. Since, in that way, the condition of the warning mode is held by the SCR, it is possible to eliminate the erroneous display and the idle trip of the shutter.
COPYRIGHT: (C)1979,JPO&Japio
JP755578A 1978-01-25 1978-01-25 Electric circuit for camera Granted JPS54100722A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP755578A JPS54100722A (en) 1978-01-25 1978-01-25 Electric circuit for camera
US06/006,225 US4305648A (en) 1978-01-25 1979-01-24 Electric circuits for use in camera
DE2942435A DE2942435C2 (en) 1978-01-25 1979-01-25 Electrical circuit for a camera
DE2954054A DE2954054C2 (en) 1978-01-25 1979-01-25 Circuit for displaying insufficient light conditions in a camera
DE2902891A DE2902891C2 (en) 1978-01-25 1979-01-25 Circuit for displaying insufficient light conditions in a camera
US06/152,764 US4375912A (en) 1978-01-25 1980-05-23 Electric circuits for use in camera

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP755578A JPS54100722A (en) 1978-01-25 1978-01-25 Electric circuit for camera

Publications (2)

Publication Number Publication Date
JPS54100722A true JPS54100722A (en) 1979-08-08
JPS6238690B2 JPS6238690B2 (en) 1987-08-19

Family

ID=11669036

Family Applications (1)

Application Number Title Priority Date Filing Date
JP755578A Granted JPS54100722A (en) 1978-01-25 1978-01-25 Electric circuit for camera

Country Status (1)

Country Link
JP (1) JPS54100722A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49133027A (en) * 1973-03-20 1974-12-20

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49133027A (en) * 1973-03-20 1974-12-20

Also Published As

Publication number Publication date
JPS6238690B2 (en) 1987-08-19

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