# US 4,395,101 A · Apparatus for presetting photographing distance for camera > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 4,395,101 A - Document ID: US4395101A - Status: Granted - Kind: A - Application number: 06/308,476 - Filed: 1981-10-05 - Granted: 1983-07-26 - Earliest claimed: 1980-11-14 - Assignees: Olympus Optical Co., Ltd. - Inventors: Ichiro Morimoto - Web page: https://patentgrep.com/patent/US4395101A ## CPC - G03B 3/10: Power-operated focusing - G03B 7/16: in accordance with both the intensity of the flash source and the distance of the flash source from the object, e.g. in accordance with the "guide number" of the flash bulb and the focusing of the camera - G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D) ## Abstract An apparatus for presetting the photographing distance for a camera is responsive to a movement of flash photography operating means to operate switch operating means which is disposed within an electronic flash to turn a power switch of the electronic flash on. In addition, means for adjusting photographing distance is also operated to bring a taking lens to a flash photography position which is located on the nearer side than a normally focussed position, in an automatic manner. ## Claims ### Claim 1 An apparatus for presetting the photographing distance for a camera which includes means for adjusting the photographing distance by causing a movement of a taking lens in the direction of an optical axis and means for establishing a normally focussed position of the taking lens in response to the closure of a lens protective cover which opens or closes the front surface of the taking lens; the apparatus comprising: switch operating means disposed on an electronic flash which is internally housed within or which is detachably mounted on the camera for turning on or off a power switch of the electronic flash; flash photography operating means for operating the switch operating means in a direction to turn the power switch on; interlock means responsive to a movement of the flash photography operating means to operate said means for adjusting the photographing distance to bring the taking lens to a flash photography position which is located on the nearer side than the normally focussed position; and said switch operating means including an indicator member having a lamp for indicating the completion of a charging operation within said electronic flash; said indicator member being movable between a position in which it projects outwardly of said electronic flash and in which said power switch is turned on, and another position retracted within said electronic flash and in which said power switch is turned off. ### Claim 2 (depends on 1) An apparatus for adjusting photographing distance according to claim 1 in which the indicator member is associated with resilient means for biasing the member of the position projecting externally of the electronic flash, and is also associated with a detent member for maintaining the indicator member in the retracted position within the electronic flash against the resilience of the resilient means, the detent member being actuated in response to the operation of the flash photography operating means to free the indicator member. ### Claim 3 An apparatus for presetting the photographing distance for a camera which includes means for adjusting the photographing distance by causing a movement of a taking lens in the direction of an optical axis and means for establishing a normally focussed position of the taking lens in response to the closure of a lens protective cover which opens or closes the front surface of the taking lens; the apparatus comprising: switch operating means disposed on an electronic flash which is internally housed within or which is detachably mounted on the camera for turning on or off a power switch of the electronic flash; flash photography operating means for operating the switch operating means in a direction to turn the power switch on; interlock means responsive to a movement of the flash photography operating means to operate said means for adjusting the photographing distance to bring the taking lens to a flash photography position which is located on the nearer side than the normally focussed position; and said interlock means comprising a V-shaped cam formed on said flash photography operating means, and a follower pin mounted on said means for adjusting photographing distance, and wherein as said flash photography operating means is operated, said cam engages said follower pin to drive it so that said means for adjusting photographing distance is driven to bring the taking lens to the flash photography position. ### Claim 4 Apparatus for presetting the flash photographing distance for the lens of a camera in combination with an electronic flash, said electronic flash having a power switch, comprising: distance presetting means for engaging and moving said lens to a predetermined setting for a flash photography distance; operating means for actuating said distance presetting means and for actuating switch operating means; said switch operating means being movable to engage and actuate said power switch to commence charging of said electronic flash; said distance presetting means including first means for rotating said lens to said predetermined flash setting and including second means for engagement by said operating means to actuate said distance presetting means; and said operating means including an operating member having engagement means for engaging and moving said second means of said distance persetting means and a connection member connected to and operated by said operating member, said connection member being operable for engaging and actuating said switch operating means. ### Claim 5 (depends on 4) Apparatus in accordance with claim 4, wherein said switch operating means includes an indicator member for indicating the completion of a charging operation within said electronic flash. ### Claim 6 Apparatus for presetting the flash photographing distance for the lens of a camera in combination with an electronic flash, said electronic flash having a power switch, comprising: distance presetting means for engaging and moving said lens to a predetermined setting for a flash photography distance; operating means for actuating said distance presetting means and for actuating switch operating means; said switch operating means being movable to engage and actuate said power switch to commence charging of said electronic flash, and including an indicator member for indicating the completion of a charging operation within said electronic flash; and said indicator member being movable between a first position in which it projects outwardly from said electronic flash and in which said power switch is turned on, and a second position wherein said indicator member is retracted within said electronic flash and in which said power switch is turned off. ### Claim 7 (depends on 6) Apparatus in accordance with claim 6, wherein said switch operating means further includes means for holding said indicator member in said retracted position within said electronic flash, said holding means being actuated by said connection member to release said indicator member.