Photographic camera with electronic timing device and leadtime control for self-timer photographs

Claim 2

Camera apparatus having an electronic time setting device for the shutter drive mechanism which comprises an electromagneticmechanical open time control circuit for the shutter drive, an electronic connectable retardation device to arrest the movement of the shutter movement temporarily after release, an indicator lamp to provide a light control to signal the beginning and the end of the function sequence of the retardation device, a circuit connected in parallel to the control circuit of the time-setting and the retardation devices, a signalling lamp connected in said last-named circuit, a first switch means for directly actuating the shutter release, and a second switch means for cutting off the lamp influenced through the control of the retardation circuit.

Claim 3

An electronic camera apparatus according to claim 1 comprising, in addition, means to intermittently flash the lighting lamp to provide a flashing light as a light control medium.

Claim 4

An electronic camera apparatus according to claim 2, comprising, in addition, a nonrotatable multivibrator for intermittently lighting the lamp, said multivibrator including a condenser, a plurality of resistance elements and a pair of transistor element connected with the lamp so that the filament of the lamp provides the working resistance for one of two transistors.

Claim 5

An electronic apparatus according to claim 2 comprising, in addition, a voltage source having its plus and minus poles connected to the two phases of the circuit of the retardation device, one of said phases includes a contact switch that it to be actuated upon release of the shutter, and the other of said phases includes a circuit breaker switch which is actuated upon termination of the prematurity control.

Claim 6

Camera apparatus having electronic timing control of the shutter mechanism which includes an electromechanical open-time stop for the shutter drive, and an electronic delaying device transferable into operational readiness for temporarily locking the action of the shutter subsequent to a depression of the release means for the shutter, a light signal for indicating both the beginning and the end of the operation of the delayed action circuit, means to cause the light developed by the light signal to flash during the operation of the delayed electronic device within said circuit, and comprising in addition an unstable multivibrator to control the flashing light effect comprising a capacitor, a plurality of resistors and two complementary transistors, and a connection of the filament of the flashing light to one of the transistors to provide a load resistor therefor.

Claim 7

Camera apparatus having electronic timing control of the shutter mechanism which includes an electromechanical open-time stop for the shutter drive, and an electronic delaying device transferable into operational readiness for temporarily locking the action of the shutter subsequent to a depression of the release means for the shutter, a light signal for indicating both the beginning and the end of the operation of the delayed action circuit, means to cause the light developed by the light signal to flash during the operation of the delayed electronic device within said circuit, and comprising in addition an unstable multivibrator to control the flashing light effect comprising a capacitor, a plurality of resistors and two complementary transistors, and a connection of the filament of the flashing light to one of the transistors to provide a load resistor therefor.