Flash apparatus for a camera

Claim 2

A shutter conTrol apparatus for a camera with a flash, comprising photosensitive time constant means having a time constant responsive to light on an object being photographed for producing a shutter controlling signal, said time constant means being switchable between said time constant and another time constant, sensor means responsive to energization of the flash, and switch means responsive to said sensor means and coupled to said time constant means for changing the time constant of said time constant means in response to operation of said sensor means, said sensor means including resistance means in series with the flash and responsive to current through the flash, said resistance means being connected to said switch means for switching said switch means in response to current through said resistance means.

Claim 3

A shutter conTrol apparatus for a camera with a flash, comprising photosensitive time constant means having a time constant responsive to light on an object being photographed for producing a shutter controlling signal, said time constant means being switchable between said time constant and another time constant, sensor means responsive to energization of the flash, and switch means responsive to said sensor means and coupled to said time constant means for changing the time constant of said time constant means in response to operation of said sensor means, said sensor means including resistance means in series with the flash and responsive to current through the flash, said resistance means being connected to said switch means for switching said switch means in response to current through said resistance means.

Claim 4

A shutter conTrol apparatus for a camera with a flash, comprising photosensitive time constant means having a time constant responsive to light on an object being photographed for producing a shutter controlling signal, said time constant means being switchable between said time constant and another time constant, sensor means responsive to energization of the flash, and switch means responsive to said sensor means and coupled to said time constant means for changing the time constant of said time constant means in response to operation of said sensor means, said sensor means including resistance means in series with the flash and responsive to current through the flash, said resistance means being connected to said switch means for switching said switch means in response to current through said resistance means.

Claim 5

An apparatus as in claim 1, wherein said time constant means includes capacitor means and photosensitive means coupled to said capacitor means and having a resistance that depends on the light on an object being photographed, said switch means being connected to said capacitor; said switch means including a portion, which when said switch means assumes an on condition, changes the time constant of said time constant means.

Claim 6

An apparatus as in claim 1, wherein said time constant means includes a capacitor and a photoresistor connected in series with each other and said switch means includes a switch connected in series with said capacitor.

Claim 7

An apparatus as in claim 1, wherein said time constant means includes a capacitor and a photosensitive element in series with said capacitor and wherein said switch means includes a switch and a resistor, said switch connecting said resistor in series with said capacitor in response to operation of said sensing means.

Claim 8

An apparatus as in claim 4, wherein said photosensitive element is a photoresistive element and said switch connects said resistor in parallel with said photoresistive element.

Claim 9

An apparatus as in claim 4, wherein said sensor means includes second photosensitive means responsive to light on an object being photographed and actuating means responsive to said second photosensitive means for actuating the flash, said actuating means being connected to said switch for actuating said switch.

Claim 10

An apparatus as in claim 4, wherein said sensor means includes actuating means for actuating the flash and a selector for connecting said photosensitive means to said actuating means so that said actuating means responds to said photosensitive means.

Claim 11

An apparatus as in claim 4, wherein said switch means includes a thyristor.

Claim 12

An apparatus as in claim 4, wherein said switch means includes a thyristor connected in series with a resistance.

Claim 13

An apparatus as in claim 1, wherein said sensor means includes second photosensitive means responsive to light on an object being photographed, and actuating means responsive to said second photosensitive means for actuating the flash, said actuating means being connected to said switch means for actuating said switch means.

Claim 14

An apparatus as in claim 1, wherein said sensor means includes actuating means for actuating the flash and a selector for connecting said photosensitive means to said actuating means so that said actuating means responds to said photosensitive means.

Claim 15

An apparatus as in claim 1, wherein said switch means includes a thyristor.

Claim 16

An apparatus as in claim 1, wherein said switch means includes a thyristor connected in series with a resistor.

Claim 17

An apparatus as in claim 1, further comprising a unit in series with said detecting element for holding the flash, said unit being adapted to receive a flash bulb having a flash filament.

Claim 18

An apparatus as in claim 1, wherein said time constant means comprises capacitor means and photoresistive means as well as resistive means, said switching means selectively connecting said resistive means in series with said capacitor means to change the time constant to one suitable for flash Photography when said switch means is on.

Claim 19

An apparatus as in claim 1, further comprising a unit for holding the flash, said unit being adapted to hold an electronic flash unit having a flashlight.

Claim 20

A shutter control apparatus for a camera with a flash, comprising photosensitive time constant means having a time constant responsive to light on an object being photographed for producing a shutter controlling signal, said time constant means being switchable between said time and another time constant sensor means responsive to energization of the flash, and switch means responsive to said sensor means and coupled to said time constant means for changing the time constant of said time constant means in response to operation of said sensor means, said time constant means including a source, said source being connectable to the flash for applying a driving potential to the flash, said sensor means having a detecting element in series with the flash for responding to current through the flash, said detecting element being connected to said switch means for switching said switch means on the basis of operation of said detecting element.

Claim 21

A shutter control apparatus for a camera with a flash, comprising photosensitive time constant means having a time constant responsive to light on an object being photographed for producing a shutter controlling signal, said time constant means being switchable between said time and another time constant sensor means responsive to energization of the flash, and switch means responsive to said sensor means and coupled to said time constant means for changing the time constant of said time constant means in response to operation of said sensor means, said time constant means including a source, said source being connectable to the flash for applying a driving potential to the flash, said sensor means having a detecting element in series with the flash for responding to current through the flash, said detecting element being connected to said switch means for switching said switch means on the basis of operation of said detecting element.

Claim 22

An apparatus as in claim 7, wherein said time constant means includes a capacitor and a photosensitive element in series with said capacitor and wherein said switch means includes a switch and a resistor, said switch connecting said resistor in series with said capacitor in response to operation of said ensing means.