JPS5611442A - Detecting circuit for stoppage of stopping-down in exposure control unit - Google Patents

Detecting circuit for stoppage of stopping-down in exposure control unit

Info

Publication number
JPS5611442A
JPS5611442A JP8576179A JP8576179A JPS5611442A JP S5611442 A JPS5611442 A JP S5611442A JP 8576179 A JP8576179 A JP 8576179A JP 8576179 A JP8576179 A JP 8576179A JP S5611442 A JPS5611442 A JP S5611442A
Authority
JP
Japan
Prior art keywords
control member
travelling
aperture control
stoppage
counter
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
JP8576179A
Other languages
Japanese (ja)
Inventor
Sadao Muramatsu
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.)
Kyocera Corp
Yashica Co Ltd
Original Assignee
Kyocera Corp
Yashica 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 Kyocera Corp, Yashica Co Ltd filed Critical Kyocera Corp
Priority to JP8576179A priority Critical patent/JPS5611442A/en
Publication of JPS5611442A publication Critical patent/JPS5611442A/en
Pending legal-status Critical Current

Links

Landscapes

  • Diaphragms For Cameras (AREA)
  • Exposure Control For Cameras (AREA)

Abstract

PURPOSE: To make possible the direct detection of the completion of running of an aperture control member without providing any switching means by detecting the stoppage of stopping-down by way of a counter which is reset by the pulse generated at the travelling of said control member.
CONSTITUTION: When a pulse Pn' generated by a gear, etc. turning cooperatively with the travelling of an aperture control member is applied to a counter 4 via an OR circuit G7, the counter 4 is reset. Hence, when the travelling of the aperture control member stops, the counter 4 counts clock ϕ0', generates a count-up signal ϕs of a high level and resets a flip-flop F2. The reset output of this F2 becomes the travelling stoppage detection signal of the aperture control member, and the subsequent sequence of mirror-up, etc. is controlled by this signal. This constitution enables the travelling stoppage of the aperture control member to be directly and accurately detected without any effect of change of the travelling speed, etc. without providing any switch, etc. operated by the aperture control member etc.
COPYRIGHT: (C)1981,JPO&Japio
JP8576179A 1979-07-06 1979-07-06 Detecting circuit for stoppage of stopping-down in exposure control unit Pending JPS5611442A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8576179A JPS5611442A (en) 1979-07-06 1979-07-06 Detecting circuit for stoppage of stopping-down in exposure control unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8576179A JPS5611442A (en) 1979-07-06 1979-07-06 Detecting circuit for stoppage of stopping-down in exposure control unit

Publications (1)

Publication Number Publication Date
JPS5611442A true JPS5611442A (en) 1981-02-04

Family

ID=13867839

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8576179A Pending JPS5611442A (en) 1979-07-06 1979-07-06 Detecting circuit for stoppage of stopping-down in exposure control unit

Country Status (1)

Country Link
JP (1) JPS5611442A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57200018A (en) * 1981-06-03 1982-12-08 Sony Corp Aperture adjusting device of camera

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5319814A (en) * 1976-08-06 1978-02-23 Matsushita Electric Ind Co Ltd Control signal generating circuit

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5319814A (en) * 1976-08-06 1978-02-23 Matsushita Electric Ind Co Ltd Control signal generating circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57200018A (en) * 1981-06-03 1982-12-08 Sony Corp Aperture adjusting device of camera
JPH038527B2 (en) * 1981-06-03 1991-02-06 Sony Corp

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