Film frame number display for camera

摘要

A frame number counter is provided which counts a signal produced as a film is being conveyed, the count signal being applied to electrooptical digital display means to initiate the frame number of the film. The data which are displayed by the display means are entered onto a film surface by optical means. The display means is also capable of indicating the date and the time of day in response to an output from an electronic clock. A vibrating sound emitter is provided which becomes operative when the count in the frame number counter reaches a given value. It is also possible to provide a down counting operation of the counter.