Film cassette and a photographing device using the same

• US 4,443,077 A
• Filed: 04/30/1981
• Issued: 04/17/1984
• Est. Priority Date: 05/02/1980
• Status: Expired due to Fees

• Current Assignee: Olympus Optical Corporation Limited (Olympus Corporation)
• Original Assignee: Olympus Optical Corporation Limited (Olympus Corporation)
• Inventors: Tanikawa, Kowji
• Primary Examiner(s): Perkey, William B.
• Application Number:
  US06/258,946
• Time in Patent Office: 1,083 Days
• Field of Search: 354/21, 354/75, 354/76, 354/275, 354/217, 354/218, 354/289, 242/71.1, 242/71.2, 242/197, 352/31-33, 352/37, 352/78 C, 352/5, 360/1, 360/97, 360/133, 353/15, 353/19
• US Class Current: 396/207
• CPC Class Codes: A61B 1/04 combined with photographic or television appliances
• CPC Class Codes: G03B 17/18 Signals indicating condition of a camera member or suitability of light indicating depth of field G03B13/30
• CPC Class Codes: G03B 17/24 with means for separately producing marks on the film, e.g. title, time of exposure
• CPC Class Codes: G03B 17/30 Locating spools or other rotatable holders of coiled film
• CPC Class Codes: G03B 2206/008 using holders for the photographic material
• CPC Class Codes: G03B 2217/244 Magnetic devices
• CPC Class Codes: G03B 7/093 for control of exposure time
• CPC Class Codes: G03B 7/24 automatically in accordance with markings or other means indicating film speed or kind of film on the magazine to be inserted in the camera

Abstract

A film cassette provided with a magnetic disc for recording data relative to a film. The magnetic disc of the film cassette makes two revolutions when one frame of the film is wound up. Data stored in the magnetic disc are read out during the first revolution of the disc, and renewed data are recorded on the disc during the second revolution.

Claims

1. A film cassette comprising:

an unexposed film chamber section containing unexposed frames of a film;

a film take-up chamber section having a film take-up spool for winding up the film in said unexposed film chamber section;

a bridge section connecting said unexposed film chamber section and said film take-up chamber section; and

a recording medium attached to at least one of said unexposed film chamber section, said film take-up chamber section and said bridge section, and on and from which film data relative to each one-frame of photographing are recorded and reproduced thereby to update the film data for each recording;

said recording medium comprising a magnetic disc rotatably mounted on said unexposed film chamber section and rotating in concert with a film winding action.

2. A film cassette according to claim 1, wherein said film data relative to each one frame of photographing comprises frame number data.

3. A film cassette comprising:

an unexposed film chamber section containing unexposed frames of a film;

a film take-up chamber section having a film take-up spool for winding up the film in said unexposed film chamber section;

a bridge section connecting said unexposed film chamber section and said film take-up chamber section; and

a recording medium attached to at least one of said unexposed film chamber section, said film take-up chamber section and said bridge section, and storing data relative to the film;

said recording medium comprising a magnetic disc rotatably mounted on said unexposed film chamber section and rotating in concert with a film winding action.

4. A film cassette according to claim 3,

wherein said stored data relative to the film comprises frame number data.