Patent GB-312516-A (GB)
Title: Improvements in or relating to photographic apparatus
IPC: G03B17/53
Filed: 1928-06-23
Abstract: 312,516. Stewart, A. June 23, 1928. Automatic and coin-freed apparatus; magazine cameras with sliding change in plane of plate and with connected action between shutter and changing mechanism; cameras for taking a series of photographs on one plate. -Photographic apparatus wherein a number of exposures of a sitter may be made on a single light-sensitive strip comprises a dark room to house one or more operators, a camera, having a lens, a shutter, and a carrier for a light-sensitive strip, which carrier is accessible from the dark room, is movable step. by-step across the axis of the lens, and accommodates a light-sensitive strip long enough to receive a number of pictures side- .by-side. In Figs. 1 and 2, the parts 10 - - 13 constitute the front wall of the dark room 14 in which the operator is stationed, the part 10 being translucent to allow the sitter to be illuminated by lamps 60. The lens 118 of the camera 18 projects through the part 11. The camera, Figs. 3 and 5, is provided with an elongated negative-strip carrier 23 sliding in guides 123, and with a shutter disc 25 which is rotated by suitable means such as a belt 26 connecting it to a pulley 27 rotated by a handle 28. The shutter has an aperture 55, the radial dimension of which is equal to one dimension of the picture. The continuous rotation of the shutter is arranged to effect a step-by-step movement of the carrier 23' to enable the desired number of exposures to be made in succession, the shutter being for this purpose provided with a pin 29 which, at each revolution, engages a toothed rack 24 rigidly connected to the carrier 23. The rack is held, after each displacement by the pin 29, by a detent 30 engaging notches in the top of the rack. To ensure that the sitter shall change his pose after each exposure there are provided around the lens 118 a number of spaced devices for attracting his attention, these devices being arranged to become attractively visible in succession. In the form shown these devices comprise windows 21, Fig. 1, behind which are lamps 20. The lamps are illuminated one at a time by a contact arm 34 carried by the rack 24 and adapted to complete a circuit between a conductor 35 and one of a series of contacts 33 in the circuits of the lamps. Means are provided in combination with the above features, for payment to be made in advance by the sitter, and for enabling such payment to attract the attention of the operator. For this purpose a lever 41, Fig. 6, is arranged to be turned about its pivot 42 by the insertion of a coin in the slot 40 formed in the part 12, Figs. 1 and 2, the lever being connected by Bowden wire &c. 44 to a bell-crank 45 adapted to close the circuit of a lamp 47 within the operator's compartment. To trip the switch and reset the coin-actuated mechanism at the end of a set of exposures, two arms 48, Figs. 3 and 6, pivoted at 49 and connected by a member 50 are provided. The upper ends of the arms 48 are adapted to be actuated by pins 51 on the carrier 23, and the member 50 carries a pivoted detent 52 adapted to actuate the lever 45 and open the circuit of the lamp 47, at the same time re-setting the lever 41. The chamber 14 contains printing and drying apparatus 314, 414, of the kind described in Specification 312,517.