Camera with film thread indicating mechanism
Camera having film feed indicator
Motor driven film rewind device for camera
Display device for a camera
Film initialization reassuring mechanism
End of film detection device
Camera with film take-up confirming mechanism
System for controlling film transport for camera Patent #: 4728976
ApplicationNo. 699081 filed on 05/13/1991
US Classes:396/406, Having significant electronic circuit detail396/284, Film condition indicator396/395, Film movement limiting means396/512Film cassette or cartridge
ExaminersPrimary: Gellner, Michael L.
Assistant: Gray, David M.
Attorney, Agent or Firm
International ClassG03B 001/18
AbstractIn a camera, a film presence sensing switch is located to detect the beginning of a full width main section of a filmstrip after a reduced width leading section of the filmstrip is wound at least partly onto a take-up spool. When a sufficient time has elapsed during the film winding operation for the reduced width section of the filmstrip to be wound onto the take-up spool, a motor drive for rotating the spool in a winding direction is de-energized should the switch fail to detect the beginning of the full width section of the filmstrip. Alternatively, the motor drive is allowed to remain energized to continue the film winding operation should the switch detect the beginning of the full width section.