Patent GB-589859-A (GB)
Title: Improvements in or relating to photographic copying apparatus
IPC: G03B27/30
Filed: 1944-01-07
Abstract: 589,859. Photographic copying apparatus. KODAK, Ltd. Jan. 7, 1944, Nos. 325 and 326. Convention dates, Jan. 8, 1943, and May 21, 1943. [Class 98 (i)] Apparatus for copying records comprises a copying machine, a record handling means for delivering records to and removing them from the machine and a sequential electric control circuit which upon stoppage of the record handling means maintains the copying machine in action until all the records, therein have been photographed. As shown in Fig. 4, the cards stacked face downwards in hopper 66 are successively fed by a reciprocating picker 70 between rollers 89 into a .guide member 90, then between rollers - 103 and endless belts 123, between wheels 98 and belts 123 to the drum 19 round which they are carried under the glass plate 30 constituting the copying position (being illuminated by a bank of lamps 37 provided with a reflector 42) and then to a stripper 151 and abutment 149 by which they are located. in vertical position against the movable front plate 142 of a stacker. Passage of a card through guide 90 operates a feeler to close a switch in series with a switch 208 operated by, a rotating cam in the picker drive to operate a magnetic counter. Bell-crank-operated switches are located in the path of the cards round wheels 98 at an interval of about 1¢ card pitches to interrupt the control circuit either in the absence of cards or in the event of incorrect spacing. The camera comprises a supply film roll, a drum, a take-up roll and an objective, and normally open switches are closed if the camera is not in proper position, if the supply roll is empty, if the take-up roll is full, and if there is loss of tension in the film between the rolls. The camera is continuously driven by a belt from a pulley driven by the synchronous motor operating the copying machine. The angular position of a card being discharged from the conveyer may be varied by adjustment of either the pads 131 or the set-screws 121. On manual stoppage of the machine or stoppage due to a fault, the feeding means is stopped immediately, but the copying machine continues to operate until all the records therein have been photographed. As shown in Fig. 3, the operating circuit for the copying machine motor 54 extends from main supply line 154 through wires 196, 329 and 330 to switch 331 and then through wires 158, 181 and 198 to the motor 54, while the other side of the motor is connected by wires 197 and 169 to main switch 221 and the other supply line 171. The operating circuit for the motor 88 of the record handling means extends from the line 154 to switch 331 as before and thence via wires 158 and 160 to one side of the motor 88, while the other side is connected via wire 342, switch contacts 343 and the wire 344 to the wire 197 in the circuit of motor 54 and thence as before. The primary control circuit extends from line 154 through wire 196, switch arm 345 of a manual normally-open double-pole switch 195, wire 163, switches R1, R3 and 153, wire 351, the timing assembly, the relay coil R2 and wires 352 and 344 to the wire 197 and thence as before. The improper location of or an abnormal film condition in camera 45 closes any of switches 50-53 to complete a circuit from earth, the relay coil R3, the secondary winding 182 of transformer 176 and any of the switches 50-53 back to earth. The primary winding 177 of transformer 176 has one side connected through wires 178 and 169 and main switch 221 to line 171 and the other through wires 179, 181 and 158, switch 331 and wires 330, 329 and 196 to the other supply line 154. A buzzer 186 connected to earth also becomes operative on closure of this camera circuit. Through relay R3, the normally-closed switch R3 of the primary control circuit is opened. The auxiliary means for winding a predetermined length of leader film on to the take-up while loading and a predetermined length of trailer film on to the take-up prior to unloading comprises a winding motor 172.connected through either of cam-operated switches 173, 174 and a singlepole double-throw switch 175 moved from one position to the other by opening or closing of the rear cover of the copying machine, and to the supply line 171. When the cover is closed, switch 175 is moved to complete the circuit through switch 173 and motor 172. After the predetermined length of leader has been wound, switch 173 opens and switch 174 closes. When the cover is opened, switch 175 is moved to complete the circuit through switch 174 and motor 172. After the predetermined length of trailer has been wound, switch 174 opens and switch 173 closes. The coil of relay R1 in parallel with motor 172 opens the normallyopen switch R1 to prevent operation of the copying machine when the auxiliary winding means is operative. Switch 153 is opened when the receiving stacker is full to prevent operation of the machine. The arm 345 of the starting switch 195 shunts the card-operated switches 161 to complete the control circuit during starting. The switch 162 is manually operable to open the control circuit. The sequential control means for the starting cycle comprises a heater coil 370 in parallel with and adjacent to a thermo-responsive switch 371 connected by wire 372, switch 373 and wire 374 to one side of relay coil R2. The voltage drop in coil. 370 and the shunting of coil R2 by switch 376 on plunger 375 and variable resistance 377 normally prevents operation of the relay, but when heater coil 370 has raised the temperature of the thermo-responsive switch 371 to cause it to close, the coil 370 is shunted and the relay coil R2 moves plunger 275 to close contacts 343 and complete the circuit of the motor 88 of the record handling means. The plunger 375 also opens the circuits of coil 370, switch 371 and variable resistance 377 and closes switch 380 to maintain the primary control circuit. In the sequential control means for the stopping cycle, one side of relay coil R4 is connected to main supply line 154 and the other through switch contacts 382, switch arm 383, heater coil 384, wires 385 and 387, switch contacts 388 normally closed by the member 389 constituting the second pole of the manual switch 195, wire 390, switch contacts 391 closable by switch arm 378 on.plunger 375, and thence to the other supply line 171. The thermo-responsive switch 392 is shunted across coil 384 and is heated thereby. The voltage drop across coil 384 is sufficient to prevent energization of relay R4 or a shuntloading resistance 393 is connected across coil R4. The coil 384 and switch 392 are byepassed when the relay R4 is energized. When the apparatus is to be started, switch 345 is depressed and the copying machine starts to operate. When switch 371 has heated up and the copying machine has attained normal speed, the relay R2 is energized and the motor 88 of the record handling means started. When the apparatus is stopped either deliberately or through an abnormal condition, the thermoresponsive , switch 392 allows the copying machine to operate for the appropriate time after stopping of the record-handling means. In a modification, a timer motor is used. In a further modification, the sequential control means for both the starting and stopping cycles may comprise timer motors and means for byepassing the motors. after their timing cycles have been completed may be provided. In a modification, the copying machine is stopped after all records therein have been photographed by the provision between the card-engaging surfaces of the drum 19 of feelers controlling a pair of normally-closed switches in series in the circuit of a solenoid controlling a normally-closed switch in the circuit of the copying machine motor 54. Absence of cards permits closure of both feelercontrolled switches to energize the solenoid to open the switch in the circuit of motor 54. Specifications 589,858 and 589,860 are referred to.