JPS5596925A - Program shutter - Google Patents

Program shutter

Info

Publication number
JPS5596925A
JPS5596925A JP435479A JP435479A JPS5596925A JP S5596925 A JPS5596925 A JP S5596925A JP 435479 A JP435479 A JP 435479A JP 435479 A JP435479 A JP 435479A JP S5596925 A JPS5596925 A JP S5596925A
Authority
JP
Japan
Prior art keywords
pulse oscillator
resistance
duty ratio
resistance value
dial
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
JP435479A
Other languages
Japanese (ja)
Inventor
Isao Harigaya
Tetsuya Taguchi
Makoto Masunaga
Yukio Ogawa
Michiro Hirohata
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP435479A priority Critical patent/JPS5596925A/en
Publication of JPS5596925A publication Critical patent/JPS5596925A/en
Pending legal-status Critical Current

Links

Landscapes

  • Shutters For Cameras (AREA)

Abstract

PURPOSE: To make possible arbitrary determination of program curves by making the duty ratio of a pulse oscillator manually changeable.
CONSTITUTION: A pulse oscillator is constituted by NAND gates 115, 117, resistances 114, 157, 116, capacitor 118, diodes 153, 154 and the resistance value of the resistance 116 is made changeable through operation of a dial 111. Then, when a release button is depressed, switches 101, 102 go ON, causing the high level signal to be applied to one input end of the AND gate 113 and the pulse oscillator to operate. The pulses of the duty ratio based on the divided voltage resistance value of the resistance 116 are then applied to a transistor 121 and the signal of a fixed voltage is intermittently applied to a coil 5, by which a sector ring is rotated to turn a shutter blade. At this time, if the divided voltage resistance value of the resistance 116 is changed by the dial 111, the duty ratio of the pulse oscillator is changed and the intended object is achieved.
COPYRIGHT: (C)1980,JPO&Japio
JP435479A 1979-01-17 1979-01-17 Program shutter Pending JPS5596925A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP435479A JPS5596925A (en) 1979-01-17 1979-01-17 Program shutter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP435479A JPS5596925A (en) 1979-01-17 1979-01-17 Program shutter

Publications (1)

Publication Number Publication Date
JPS5596925A true JPS5596925A (en) 1980-07-23

Family

ID=11582059

Family Applications (1)

Application Number Title Priority Date Filing Date
JP435479A Pending JPS5596925A (en) 1979-01-17 1979-01-17 Program shutter

Country Status (1)

Country Link
JP (1) JPS5596925A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5626727U (en) * 1980-06-27 1981-03-12
US5134435A (en) * 1985-04-25 1992-07-28 Canon Kabushiki Kaisha Camera
US6347191B1 (en) 1999-10-26 2002-02-12 Nidec Copal Corporation Shutter control apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5626727U (en) * 1980-06-27 1981-03-12
US5134435A (en) * 1985-04-25 1992-07-28 Canon Kabushiki Kaisha Camera
US6347191B1 (en) 1999-10-26 2002-02-12 Nidec Copal Corporation Shutter control apparatus

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