Camera connected with electronic flash device

Claim 2

Apparatus for controlling the exposure of an electronic flash device and flash control circuitry for a camera, comprising: an electrically operated shutter including a diaphragm setting ring for a lens in the camera, an interlocking member engaging with said diaphragm setting ring, a film sensitivity setting member, an operation mechanism connected to said iNterlocking member and said film sensitivity setting member, a photometric circuit including a photoconductive element for generating an output corresponding to the brightness of an object, an electromagnet for starting the closing of the shutter, and a differential amplifier circuit for operating said electromagnet and having a variable trigger level; said flash control circuit includes a photosensitive element for receiving light rays of an object including the reflected light rays of the flash device, an integrating circuit for integrating the output of said photosensitive element, and a trigger circuit for extinguishing said electronic flash device when the integrated value of said integrating circuit is substantially equal to the trigger level of said differential amplifier; means for changing the trigger level of said differential amplifier circuit; means for changing the trigger level in said trigger circuit; and means for transmitting the preset diaphragm setting and the film sensitivity setting from said operation mechanism to said trigger circuit.

Claim 3

Apparatus for controlling the exposure of an electronic flash device and flash control circuitry for a camera, comprising: a diaphragm biased to be open in an interchangeable lens of said camera; a preset diaphragm ring for said diaphragm; an interlocking member engaging with said preset diaphragm ring when an interchangeable lens is mounted to the camera; a film sensitivity setting member; an operation mechanism connected to said film sensitivity setting member and said interlocking member; an exposure meter having a photosensitive element for receiving object light rays passing through said opening diaphragm; a means for adjusting the indication of said exposure meter in accordance with the movement of said operation mechanism; an electric shutter control circuit including a photometric circuit including said photosensitive element, an electromagnet for starting the closing of the shutter, and a differential amplifier circuit for operating said electromagnet and having a variable trigger level; means for changing the trigger level in said electric shutter in accordance with the movement of said operation mechanism; an integrating circuit for integrating the output of said photosensitive element; said flash control circuit including a trigger circuit for extinguishing said electronic flash tube when the integrated value of said integrating circuit is substantially equal to the trigger level of said differential amplifier circuit; and means for transmitting the preset diaphragm setting and the film sensitivity setting from said operation mechanism to said trigger circuit.

Claim 4

Apparatus for controlling the exposure of an electronic flash device and flash control circuitry for a camera, comprising: a diaphragm biased to be open in an interchangeable lens of said camera; a preset diaphragm ring for said diaphragm; an interlocking member engaging with said preset diaphragm ring when an interchangeable lens is mounted to the camera; a film sensitivity setting member; an operation mechanism connected to said film sensitivity setting member and said interlocking member; an exposure meter having a photosensitive element for receiving object light rays passing through said opening diaphragm; a means for adjusting the indication of said exposure meter in accordance with the movement of said operation mechanism; an electric shutter control circuit including a photometric circuit including said photosensitive element, an electromagnet for starting the closing of the shutter, and a differential amplifier circuit for operating said electromagnet and having a variable trigger level; means for changing the trigger level in said electric shutter in accordance with the movement of said operation mechanism; an integrating circuit for integrating the output of said photosensitive element; said flash control circuit including a trigger circuit for extinguishing said electronic flash tube when the integrated value of said integrating circuit is substantially equal to the trigger level of said differential amplifier circuit; and means for transmitting the preset diaphragm setting and the film sensitivity setting from said operation mechanism to said trigger circuit.

Claim 5

A combination of a camera and an electronic flash device set forth in claim 2, wherein said camera is provided with an operation mechanism comprising: a spindle supported rotatably on the camera main body; a film sensitivity setting dial fixed to said spindle; a first fixed pulley fixed to said spindle; a second rotatable pulley supported rotatably on said spindle; a partially toothless gear supported rotatably on said spindle and having an arm extending in the axial direction; a planetary pulley supported rotatably on said arm; a flexible string body one end of which is fastened to said first fixed pulley and the other end of which is fastened to the periphery of said interlocking member, being spread over said planetary pulley and second rotatable pulley; a sleeve provided with a gear meshed with said partially toothless gear and formed with an annulus opening diaphragm indication portion on one end thereof and a saw-tooth shaped clutch tooth on the other end thereof; a central spindle fitted rotatably and slidably in said sleeve and provided on one end thereof with a disc shaped opening diaphragm indication portion for cooperating with said annulus opening diaphragm indication portion, aNd a saw-tooth shaped clutch tooth meshable with said saw-tooth shaped clutch tooth of said sleeve; and a variable resistance which value is changed through the rotation of said central spindle; and a means for adjusting the indication of the exposure meter in interlocking with the rotation of said central spindle, a means for changing the trigger level in the electric shutter in interlocking with the rotation of said central spindle, and a means for changing the trigger level in the trigger circuit in said electronic flash device in interlocking with the rotation of said central spindle.

Claim 6

Apparatus for controlling the exposure of an electronic flash device and flash control circuitry for a camera, comprising: means for generating an electronic flash; a flash control circuit including a light measuring circuit for receiving light from an object illuminated by said means for generating an electronic flash and for generating electric current in response thereto, integrating means for integrating said electric current, and means responsive to said integrating means for terminating the flash at a predetermined level of said integrated current; a diaphragm aperture setting member; a film speed setting member; biasing means for adjusting said predetermined level, and means for interconnecting said biasing means with said diaphragm aperture setting member and said film speed setting member so that said biasing means is adjusted as a function of the diaphragm aperture setting and the film speed setting.

Claim 7

Apparatus for controlling the exposure of an electronic flash device and flash control circuitry for a camera, comprising: means for generating an electronic flash; a flash control circuit including a light measuring circuit for receiving light from an object illuminated by said means for generating an electronic flash and for generating electric current in response thereto, integrating means for integrating said electric current, and means responsive to said integrating means for terminating the flash at a predetermined level of said integrated current; a diaphragm aperture setting member; a film speed setting member; biasing means for adjusting said predetermined level, and means for interconnecting said biasing means with said diaphragm aperture setting member and said film speed setting member so that said biasing means is adjusted as a function of the diaphragm aperture setting and the film speed setting.

Claim 8

Apparatus as in claim 4, wherein said means for interconnecting said biasing means with said diaphragm aperture setting member and said film speed setting member comprises: a rotatable first spindle; a film speed setting dial and a first pulley mounted to said first spindle; a second pulley and a sector gear rotatably supported to said film speed setting dial and having an arm extending radially therefrom; a planetary pulley supported rotatably on said arm; a rotatable second spindle; first and second gears, a distance scale indicating member, and a member for adjusting said biasing means, said first gear engaging with said sector gear; and an interconnecting member and a flexible wire one end of which is fastened to said first pulley and the other end of which is fastened to said interconnecting member for interconnecting said biasing means with said diaphragm aperture setting member, said wire being spread over said planetary pulley and said second pulley.

Claim 9

Apparatus as in claim 4 further comprising: an exposure control circuit including a second light measuring circuit receptive to light from an object to be photographed and for generating electric current in accordance therewith, means for terminating exposure, and a switching circuit for actuating said means for terminating exposure.

Claim 10

Apparatus as in claim 6 wherein said exposure control circuit further includes switch means for connecting said biasing means to said switching circuit.

Claim 11

Apparatus as in claim 6, further comprising: an exposure meter actuated by said second light measuring circuit; and means for adjusting said means for interconnecting whereby said biasing means are adjusted in accordance with the indication of said exposure meter.

Claim 12

Apparatus as in claim 8, wherein said camera has an interchangeable objective lens attachable to the camera body, and a diaphragm having an opening tendency and said diaphragm setting member is a preset member for presetting diaphragm aperture settings further comprising: an interlocking member engaging with said preset member when said interchangeable objective lens is attached to the camera body and wherein said switching circuit is a differential amplifier.

Claim 13

Apparatus as in claim 9 wherein said means for interconnecting said film speed setting member and said diaphragm aperture setting member with said biasing means comprises: a first Rotatable spindle, a film speed setting dial and a first pulley mounted to said first spindle, a second pulley and a sector gear rotatably supported on said first pulley, said sector gear having an arm extending in the radial direction; a planetary pulley supported rotatably on said arm; a flexible wire one end of which is fastened to said first pulley and the other end of which is fastened to the periphery of said interlocking member, said wire being spread over said planetary pulley and said second pulley; a sleeve having a gear engaging with said sector gear, said sleeve including a fully opened diaphragm scale on one end thereof and a saw-tooth shaped clutch on the other end thereof; a second spindle mounted rotatably and slidably in said sleeve and provided on one end thereof with an index for indicating a selected diaphragm setting from said scale, and a second saw-tooth shaped clutch engageable with said first saw-tooth shaped clutch; a variable resistance adjustable by rotation of said second spindle; means for adjusting said second spindle in accordance with the indication of said exposure meter; means for adjusting the level of said switching circuit in the exposure control circuit in accordance with the impedance of said variable resistance; and switching means for transmitting said impedance to said flash control circuit for adjusting the level thereof to terminate the flash.