JPS5785043A - Film feed circuit - Google Patents

Film feed circuit

Info

Publication number
JPS5785043A
JPS5785043A JP16213980A JP16213980A JPS5785043A JP S5785043 A JPS5785043 A JP S5785043A JP 16213980 A JP16213980 A JP 16213980A JP 16213980 A JP16213980 A JP 16213980A JP S5785043 A JPS5785043 A JP S5785043A
Authority
JP
Japan
Prior art keywords
film
motor
perforation
constitution
voltage
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
JP16213980A
Other languages
Japanese (ja)
Inventor
Akira Takahashi
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 JP16213980A priority Critical patent/JPS5785043A/en
Priority to US06/320,930 priority patent/US4431292A/en
Priority to DE3152998A priority patent/DE3152998C2/en
Priority to DE3145594A priority patent/DE3145594C2/en
Priority to DE3152997A priority patent/DE3152997C2/de
Publication of JPS5785043A publication Critical patent/JPS5785043A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B1/00—Film strip handling
    • G03B1/60—Measuring or indicating length of the used or unused film; Counting number of exposures

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Details Of Cameras Including Film Mechanisms (AREA)
  • Winding Of Webs (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)

Abstract

PURPOSE:To detect the end of full feeding of a film accurately and stop the same without sacrificing motor characteristics by detecting the failure in obtaining perforations for a certain time during film feeding operation and processing the same. CONSTITUTION:When a film F stops upon ending of the full feeding of a film F, there are no more perforation signals from a perforation detecting circuit 1, and a capacitor C5 is no longer reset and in turn the voltage at the point A rises successively. When the perforation signals do not arrive for over a certain time, the voltage at the point A attains reference voltage ref, and the output of an operational amplifier OP4 goes H, thereby resetting an FF1 via an OR circuit OR1. Hence, a control circuit returns to an intial state, and the power supply to a motor M is stopped. With such constitution, the end of the full feeding of the film is detected accurately and the film feed is stopped without sacrificing the characteristics of the motor.
JP16213980A 1980-11-18 1980-11-18 Film feed circuit Pending JPS5785043A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP16213980A JPS5785043A (en) 1980-11-18 1980-11-18 Film feed circuit
US06/320,930 US4431292A (en) 1980-11-18 1981-11-13 Film feeding circuit
DE3152998A DE3152998C2 (en) 1980-11-18 1981-11-17 Control circuit for the film transport motor of a still camera
DE3145594A DE3145594C2 (en) 1980-11-18 1981-11-17 Control circuit for the film transport motor of a still camera
DE3152997A DE3152997C2 (en) 1980-11-18 1981-11-17

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16213980A JPS5785043A (en) 1980-11-18 1980-11-18 Film feed circuit

Publications (1)

Publication Number Publication Date
JPS5785043A true JPS5785043A (en) 1982-05-27

Family

ID=15748771

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16213980A Pending JPS5785043A (en) 1980-11-18 1980-11-18 Film feed circuit

Country Status (1)

Country Link
JP (1) JPS5785043A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5426724A (en) * 1977-08-01 1979-02-28 Canon Inc Film movement detector for camera

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5426724A (en) * 1977-08-01 1979-02-28 Canon Inc Film movement detector for camera

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