Patent GB-399501-A (GB)
Title: Improvements in the control of several associated machines each having an individualdrive
IPC: A23G3/02
Filed: 1932-04-04
Abstract: 399,501. Control o f two motors; actuation of switches. HERSEY MANUFACTURING CO., 2nd Street, South Boston, U.S.A.-(Assignees of Harrigan, H. W.; 42, Argyle Street, Melrose, Massachusetts, U.S.A.) April 4, 1932, No. 9672. Convention date, April 4, 1931.] Classes 38 (iii) and 38 (v).] . An electric motor driving a plant for re-conditioring starch after its use for moulding marshmallows &c. is started and stopped automatically only after the moulding-machine has been in continuous operation or has been at rest for a predetermined time. The motor 100, Fig. 14, drives the moulding-machine and when energized causes a relay 203 to start a timing-motor 151. When a shift-bar is moved to clutch the motor 100 with the moulding- machine, a friction wheel is brought into engagement with the pilot motor 151 and after a predetermined rotation it operates through a cam a switch 175a to its opposite position thus starting the motor 40 driving the reconditioning plant. When the clutch-bar is moved in the opposite direction another friction wheel is moved into engagement with the pilot motor 151 and eventually operates a switch 175 to its opposite position and thus stops the motor 40. Relay 205 maintains the pilot motor 151 in operation after the motor 100 is de-energized and until motor 40 is also de-energized. The reconditioning plant is shown in Fig. 1. Used starch from the moulding-machine 1 is transferred by an elevator 2 to a drier 4. Air is drawn by a fan 13 from a heater 10, through the drier 4 and a separator 17, which returns any particles of starch to the drier 4. The starch then passes to a cleaner 22, and is returned through a cooler 25 to the moulding- machine 1. The drier, cleaner, cooler and associated conveyers are driven by the motor 40. The moulding-machine 1 is started and stopped by operation of a shift-bar 102 which clutches and unclutches it to the motor 100. Movement of the bar 102 causes, by cable 103, actuation of a time-delay switch 105 controlling the motor 40. Pull on the cable 103 tilts a shaft 131, Fig. 3, about a pivot 129 so that a friction-pulley 145 thereon engages a corresponding friction-wheel 146 driven slowly by a timing-motor 151. When the shaft 131 has been frictionally rotated nearly a revolution, a cam 178 thereon operates a switch 170 to start or stop the motor 40, slight further rotation of the shaft causes it to be uncoupled from a slide 110 to which the cable 103 is connected, and under the action of a weight 165 the shaft tilts downwards and quickly rotates to its initial position. It can only be tilted upwards again by lowering the associated slide 116, to which it recouples, and then raising the slide. The slides, shaft's, and friction-wheels are duplicated, one set being used for stopping and the other for starting the motor 40. If a slide is lowered by actuation of the shift-bar 102 before it has caused operation of the associated switch 170, it is rotated by the weight 165 to its initial position so that, when next raised, the full time interval elapses before operation of the switch 170.