Indicator for flashlight photography

Claim 2

An indicator system for a camera, comprising photosensitive means responsive to the light on an object meter means coupled to said photosensitive means for indicating over a given range the light to which such photosensitive means is subject, source means, connection means connectable to a flash unit, switch means connecting said connection means to said source means for operating said flash unit when said flash unit is connected to said connection means, and circuit means for coupling said connection means and said source means into said meter means for establishing a reading outside the given range when said connection means is connected to the flash unit.

Claim 3

An indicator as in claim 1 wherein said connection means connects to a flash unit composed of a flashbulb whereby the flashbulb changes the impedance of said connection means.

Claim 4

An indicator as in claim 1, wherein said photosensitive means includes a photoelectric transducer.

Claim 5

An indicator as in claim 3, wherein said photoelectric transducer includes a photovoltaic cell.

Claim 6

An indicator as in claim 3, wherein said photoelectric transducer includes a photoconductor and wherein said photosensitive means includes electrical energizer means for energizing said photoconductor.

Claim 7

An indicator as in claim 1, wherein the given range includes an underrange and an overrange.

Claim 8

An indicator as in claim 1, wherein said photosensitive means includes a photoconductor, and wherein said circuit means includes electrical means for connecting said photoconductor to said source means.

Claim 9

An indicator as in claim 4, wherein said circuit means connects said source means to said meter means only when said connection means is connected to the flash unit.

Claim 10

An indicator as in claim 1, wherein said switch means includes capacitor means connected parallel to said connection means.

Claim 11

An indicator as in claim 1, wherein said circuit means connects said source means to said meter means such as to reinforce the effect of said photosensitive means.

Claim 12

An indicator as in claim 1, wherein said circuit means connects said source means to said meter means when said connection means is connected to the flash unit so as to buck the effect of said photosensitive means.

Claim 13

An indicator as in claim 1, wherein said circuit means includes a switch for indicating a flash-ready condition, said switch being connected in said circuit means so as to energize said meter means with said source means in response to said connection means only when the switch indicates a flash-ready condition so as to otherwise indicate a non-flash-ready condition.

Claim 14

An indicator as in claim 1, wherein said circuit means includes a current-limiting resistor for limiting the current from said source means through said meter means.

Claim 15

An indicator as in claim 1, wherein the effect of said circuit means upon said meter means is to reduce the reading below the given range.

Claim 16

An indicator as in claim 14, wherein said given range includes an underrange and an overrange and wherein said circuit means causes said meter means to read below said underrange when said connection means is connected to a flash unit.

Claim 17

An indicator as in claim 15, wherein said photosensitive means includes a photoconductor.

Claim 18

An indicator as in claim 15, wherein said photosensitive means a photovoltaic cell and a bypass resistor having a predetermined resistance value connected to said photovoltaic cell so as to establish a predetermined electric current flow when said meter means reads in the underrange, and a cutoff switch in said photosensitive means.

Claim 19

An indicator as in claim 2, wherein insertion of the flashbulb into said connection means constitutes a switch for indicating a flash-ready condition.

Claim 20

An indicator as in claim 1, wherein the range includes an underrange and an overrange, and wherein said circuit means, when said connection means is connected to a flash unit, constrains said meter means to read higher than overrange.

Claim 21

An indicator as in claim 19, wherein said photosensitive means includes a photoconductor.

Claim 22

An indicator as in claim 1, wherein said given range includes an overrange and an underrange, said underrange indicates low lighting conditions, said circuits means constraining said meter means when said connection means is connected to a flash unit to read higher than said overrange.

Claim 23

An apparatus as in claim 1, wherein said switch means includes a capacitor connected to said source means and a switch connecting said capacitor to said connection means.

Claim 24

An indicator for flash photography comprising an exposure-measuring circuit having an ammeter and an photosensitive power source, a flash-ready signalling means having a flash-ready condition and a non-flash-ready condition, the flash-ready condition existing outside of a non-flash-ready range composed of an EE operation range, an overrange, and an underrange of the meter, said meter having a pointer for pointing into said ranges, said flash-ready signalling means bringing said pointer into said flash-ready range to indicate that preparation for flashlight photography is completed oNly when said flash-ready signalling means is brought into said flash-ready condition, said flash-ready signalling means bringing said pointer into said non-flash-ready range for indication of said non-flash-ready condition, operating means for a flash-auto mechanism for indicating flash-ready when set on flash, and a flash circuit for completing the preparation of flash photography in response to the flash-auto mechanism.

Claim 25

An indicator for flash photography comprising an exposure-measuring circuit having an ammeter and an photosensitive power source, a flash-ready signalling means having a flash-ready condition and a non-flash-ready condition, the flash-ready condition existing outside of a non-flash-ready range composed of an EE operation range, an overrange, and an underrange of the meter, said meter having a pointer for pointing into said ranges, said flash-ready signalling means bringing said pointer into said flash-ready range to indicate that preparation for flashlight photography is completed oNly when said flash-ready signalling means is brought into said flash-ready condition, said flash-ready signalling means bringing said pointer into said non-flash-ready range for indication of said non-flash-ready condition, operating means for a flash-auto mechanism for indicating flash-ready when set on flash, and a flash circuit for completing the preparation of flash photography in response to the flash-auto mechanism.

Claim 26

A camera comprising an objective, iris means, shutter means, shutter release means, photosensitive means responsive to the light on an object to the photographed by the camera, meter means coupled to said photosensitive means for indicating over a given range the light to which said photosensitive means is subject, source means, connection means for receiving a flashbulb, switch means connecting said connection means to said source for operating said flashbulb when said flashbulb is set in said connection means, and circuit means for coupling said connection means and said source means to said meter means for establishing a reading outside the given range when said connection means is connected to the bulb.

Claim 27

A camera comprising an objective, iris means, shutter means, shutter release means, photosensitive means responsive to the light on an object to the photographed by the camera, meter means coupled to said photosensitive means for indicating over a given range the light to which said photosensitive means is subject, source means, connection means for receiving a flashbulb, switch means connecting said connection means to said source for operating said flashbulb when said flashbulb is set in said connection means, and circuit means for coupling said connection means and said source means to said meter means for establishing a reading outside the given range when said connection means is connected to the bulb.

Claim 28

A camera as in claim 24, further comprising a shutter speed detecting member, said meter means including a stop member for stopping said detecting member at a predetermined location.