Camera with motorised film advancement
AssigneeFoster Assets Corporation
InventorYet Chan
Life of this patent
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Abstract
A camera (2) has a main body (4) defining a pair of film chambers on opposite sides of an exposure opening (18) comprising a first chamber (14) for receiving a film cassette having a central spool to which film is secured and a second chamber (16) for receiving a second film container into which film is pre-wound prior to use, a drive shaft having an end which extends into the first chamber (14) for engaging the spool, an electric motor (30) disposed between the chambers operably connected to the drive shaft to drive the shaft in one direction, and a shutter mechanism with a shutter release assembly operably connected to the motor control.
Claims19
A camera comprising a main body defining a pair of film chambers on opposite sides of an exposure opening comprising a first chamber for receiving a film cassette having a central spool to which film is secured and a second chamber for receiving a second film container into which film is pre-wound prior to use, a drive shaft having an end which extends into the first chamber for engaging the spool, and an electric motor operably connected to the drive shaft to drive the drive shaft in one direction.
A camera comprising a main body defining a pair of film chambers on opposite sides of an exposure opening comprising a first chamber for receiving a film cassette having a central spool to which film is secured and a second chamber for containing film pre-wound therein prior to use, a drive shaft having an end which extends into the first chamber for engaging the spool, and an electric motor disposed between the first and second chambers and operably connected to the drive shaft to drive the shaft in one direction.
A camera comprising a main body defining a pair of film chambers on opposite sides of an exposure opening comprising a first chamber for receiving a film cassette having a central spool to which film is secured and a second chamber for containing film pre-wound therein prior to use, and a rear cover removable from the main body to expose the film chambers, a rotably mounted film counter operably connected to drive means which, in use, engage the film whereby the film counter is rotably driven on film advancement, the film counter comprising a circular member with peripheral teeth and including a spring to urge the counter towards a re-set position, the film advancement rotating the film counter against the action of the spring, and wherein ratchet means engage the film counter is ensure its rotation in one direction only on film advancement.
A camera comprising:
- a main body defining a pair of film chambers on opposite sides of an exposure opening comprising a first chamber for receiving a film cassette having a central spool to which film is secured and a second chamber for receiving a second film container into which film is pre-wound prior to use,
- a drive shaft having an end which extends into the first chamber for engaging the spool,
- an electric motor operably connected to the drive shaft to drive the drive shaft in one direction,
- a shutter mechanism including a movable shutter blade,
- a shutter release assembly having a user-accessible shutter button which acts on a shutter release lever which in turn acts on the shutter blade, and having a primed position wherein depression of the shutter button activates the shutter and a discharged position,
- motor control switch means comprising first and second spring contacts, the second contact overlying the first and being spaced therefrom in the primed position, the shutter release lever being arranged to be depressible through the action of the shutter button against the action of a return spring, and to return to an upward position on return to the primed position, the shutter button also acting on the first spring contact to depress this on depression of the shutter button, and the second spring contact being downwardly biased and abutting the shutter release lever in the primed position, whereby electrical contact is made after depression and subsequent release of the shutter button.
Dependencies are inferred from the claim text.