Release device for a camera having a memory type electronics time control device

Claim 2

Camera according to claim 1, which further comprises a displaying means for indicating whether the retaining means is in the retaining condition or not.

Claim 3

A camera according to claim 1, which further comprises an accessory unit having a setting member for said setting means and adapted to cooperate with a camera unit.

Claim 4

In a camera having an electronic shutter time control device and facilities for exposing a succession of film segments on a film at a cyclic rate during a manually selectable interval, the improvement which comprises, reference means for producing a reference voltage in accordance with an exposure factor such as brightness of objects to be photographed, a holding capacitor, exposure control means for defining a shutter duration corresponding to the value of a voltage applied thereto, first switching means operative when in a first position for connecting the producing means to the holding capacitor for storing the reference voltage and operative when in a second position for connecting the holding capacitor to the exposure control means to set the shutter duration corresponding to the value of the voltage stored across the holding capacitor, second switching means rendered effective upon the initiation of the selectable interval for changing the first switching means from the first to the second position, change-over means for selecting between a relatively slow cyclic rate and a relatively fast cyclic rate, wind-up control means responsive to the selected cyclic rate for effecting winding of the film following each exposure, third switching means normally operative after the initiation of the selectable interval for changing the first switching means from the second position to the first position following the conclusion of each exposure and for subsequently changing the first switching means from the first position to the second position at the conclusion of the next succeeding film winding operation, and means rendered effective when the relatively short cyclic rate is selected for preventing the third switching means from changing the first switching means from the second position to the first position until the conclusion of the manually selectable interval whereby the holding capacitor retains the same value of reference voltage during such interval.

Claim 5

A camera according to claim 5, which further comprises a fifth switching means connected in parallel with the third switching means.

Claim 6

A camera according to claim 5, which further comprises a fifth switching means connected in parallel with the third switching means.

Claim 7

A camera according to claim 5, in which the wind-up control means comprises an interval timer for setting the length of the exposure cycle.

Claim 8

A camera according to claim 5, in which the camera further comprises means for housing the combination of the change-over means, the wind-up control means, the third switching means, and the fourth switching means in a package separate from the remainder of the camera.

Claim 9

A camera according to claim 5, in which the camera further comprises a time constant circuit associated with the change-over means for delaying the start of operation of the wind-up control means in accordance with the cyclic rate selection of the change-over means.

Claim 10

A camera according to claim 10, in which the time constant circuit comprises a plurality of resistors connected in parallel, and a capacitor connected to one of the plurality of resistors.

Claim 11

A camera according to claim 5, in which the wind-up control means comprises, in combination, a power source, a driving means connected to the power source, a magnetic member connected in parallel to the driving means for initiating each exposure, and a latching relay connected between both terminals of the power source and operative for alternating the operation of the magnetic member and the driving means.

Claim 12

A camera according to claim 12 in which the driving means is connected in series with a semi-conductor element which is triggered ''''on'''' by the electrical output of the wind-up control means.

Claim 13

A camera according to claim 13, in which the camera further comprises, normally disabled fifth switching means for interconnecting the power source and a magnetic member, and means responsive to the initiation of the manually selectable interval for enabling the fifth switching means.

Claim 14

A camera according to claim 13, in which the camera further comprises, normally enabled fifth switching means for interconnecting the power source and the driving means, and means responsive to the initiation of the manually selectable interval for disabling the fourth switching means.