Patent GB-316724-A (GB)
Title: Improvements in photographic cameras
IPC: G03B17/50
Filed: 1928-05-30
Abstract: 316,724. Fillis, G. F. May 30, 1928. Imitation coin-freed apparatus comprises a cabinet mounted on castors or wheels and forming in itself a camera, so that a strip of sensitive material, freely exposed at all times within the cabinet, may be exposed to an image formed by a lens carried by a wall of the cabinet, the negative being developed, and a finished photograph produced, within the cabinet by an operator accommodated therein. Cameras fitted with dark rooms; focusing devices.-The cabinet is built up from separate panels a - - a<5>, Figs. 1 and 2, so as to be readily taken to pieces, and it is mounted on wheels or castors b to enable it to be moved to any position. The front panel a is provided with an opening a<6> fitted with a pyramidal camera body a<7> terminating in an aperture behind which is pivoted a plate c carrying one or more lenses c', c<2> of different focal lengths. The cabinet contains a shelf d which supports a plate or film magazine e, a developing table f, and a drying oven g. The oven is electrically heated, and the waste heat is used to keep the solutions in the dishes at the required temperature. Adjustable light-boxes i are arranged on the outside of the cabinet to flood-light the sitter. The light may be switched on by coin-freed mechanism, or by means of a switch actuated by the operator. The sitter is placed on a platform k and is preferably seated on an adjustable stool. This may consist of a seat l carried by a vertical rack l<2> which can be raised or lowered by a pinion l<4> rotated by a crank l<5>. An arm l<6>, hinged to the seat, engages a stepped ratchet l<7> to enable the seat to be locked at any suitable height. Multiple photograph cameras; change-boxes, self-contained.-The exposures are made on strips x, Figs. 3 and 4, of sensitized plate or film a number of exposures being made on each plate. The strips, inserted in metal sheaths m, are stored one behind the other in an inclined tray or magazine e so that they are fed downwards against a frame e<1> in the focal plane of the lens. A weighted roller m*, or a spring, may be used to press the sheaths downwards. The magazine e can be moved laterally so as to bring each portion of the lowermost plate into position for exposure. This may be done by arranging the magazine to slide on guide rods e<1> and providing a screwed shaft e3 to move the trav. The shaft may be operated by a handle on the outside of the cabinet. In a modified construction, the tray may be drawn to one side by a spring or weight, but is retained in position by a pivoted bar provided with staggered ratchet teeth. On moving the bar up and down, the tray is allowed to move the required distance. The edge of such plate sheath is provided with a hook m<1> which engages a catch m<2> when the last exposure is made on a strip. When the tray has moved back to its initial position, the catch withdraws the exposed plate from the magazine and a new strip is fed forwards by the weight m*. A focusing screen y is attached to the magazine. Roll spools.-In a modification in which paper negatives are produced, a roll of sensitized paper x*, Fig. 13, is stored within a light-tight box o, and its free end passes between guides o<3> arranged in the focal plane. of the lens. Rollers o<1>, o<2> are arranged to feed the paper forwards through the guide, and they may be operated from outside the cabinet. A pivoted blade p is provided to cut off the exposed strip. Shutters with sliding plates.-The shutter may be operated by a plunger n', Figs. 8 and 9, which slides in a hollow crank shaft n that operates the shaft e<3> of the plate magazine. The, plunger moves a pair of discs n<2> which rotate with, but are free to slide on, the shaft n, and the movement of the discs can be made to operate the release of any suitable form of shutter. Preferably, a pin r carried by a rotatable disc r<1> engages between the discs n<2>. The disc r<1> is connected bv a link r<4> with a lever r<5> which moves a sliding shutter s. Projection printing. - Paper negatives are printed by placing them within a holder t, Fig. 15, secured to the hinged back of a light-tight box t<2> which is fitted with a lens t<6> and contains electric lamps and reflectors. When the back is closed and the, lamps are switched on, an image is projected on to an easel t<8> which supports a single sheet t' of sensitive paper, or a. pile of sheets, or a roll holder. The finished prints are delivered through a masked opening a<8> in the cabinet.