Patent GB-318184-A (GB)
Title: Improvements in or relating to photographic coin-freed semiautomatic apparatus
IPC: G03B17/53
Filed: 1928-05-25
Abstract: 318,184. Hart, S., and Stealey, J. I. May 25, 1928. Automatic and coin-freed apparatus.-In a coin-controlled apparatus for taking a series of photographs, each exposure is effected by the client or an attendant, after a coin-operated main control device is operated, the photographs being taken on a strip of sensitive material in a carrier which is stepped automatically after each exposure. After the last exposure, the movement of the carrier returns the main control to idle position, and also closes the coin-shoot, so that the machine cannot be used again until the carrier has been replenished and re-set. The completelyexposed strip is automatically delivered from the carrier to an attendant for development, or to automatic developing and finishing apparatus. In the cabinet apparatus described, the sitter's compartment is in front of a partition 22, Fig. 1, behind which an operator can work. One set of lamps 15 is switched on by a main switch 25, Figs. 2 and 3, the circuit passing through a switch 75 which is normally closed and only opened after the series of exposures, by a projection 76 when the bar 57 and carrier 66 of the sensitive strip have moved to the limit of the stop 71. Two other series of lamps 13, 14, are switched on when the main control switch 36, 37 is closed by a coin inserted through the slot 18 into the shoot 28. The coin tilts the counterbalanced lever 30 and rests on a sloping bottom 34, Fig. 6, of the shoot against a plate 39 which forms one of the arms of a three-armed lever 40, pivoted at 41. A second arm 42 of this lever is connected to the armature 43 of a solenoid 44 which is normally short-circuited by the switch 75, but which is energized by the opening of this switch at the end of the series of exposures, thereby rocking the lever 40, causing the arm 39 to swing and release the coin 46 which rolls into the collecting shoot 29, and also causing the third arm 45 to close the coin-shoot 28. The carrier 66 is mounted behind a partition 45<a>, Figs. 1 and 2, in front of which is the lens 48 and shutter 50. The carrier is mounted on the bar 57 sliding in brackets 58 and normally urged to the right by the spring 60. The bar 57 is notched at 63, and held in successive positions by a spring pressed catch 61. The sliding shutter 50 constructed as described in Specification 312,877, is raised for an exposure by a solenoid 56, and the catch 61 momentarily released by a second solenoid 65, the armature of which drops on to the catch 61 when the solenoid current is broken. The solenoids 65, 56 are in series and energized when the shorting switch 19 is opened by the client or attendant. The sensitized strip rests partially on a ledge 68 secured to the partition 45a, and partially on the projecting end 69 of a spring plate 70 mounted on the carrier. The final movement of the carrier brings the sensitized strip beyond the ledge 68, and the plate 70 is retracted by the stop 71, releasing the strip which falls into a receptacle 73. The projection 76 at the other end of the bar 57 also opens the switch 75,. thereby energizing the solenoid 44 to release the coin, reopen the switch 36, 37, and close the coin-shoot 28. The re-setting movement of the carrier and bar 57, re-closes the switch 75 and re-opens the shoot 28.