Patent GB-410861-A (GB)
Title: Improvement in the control of several associated machines each having an individual drive
IPC: A23G3/02
Filed: 1932-11-28
Abstract: 410,861. Control of two motors; snapaction switches. HERSEY MANUFACTURING CO., E. Street, South Boston, U.S.A.- (Assignees of Harrigan, H. W. ; 42, Argyle Street, Melrose, Massachusetts, U.S.A.) Nov. 28, 1932, No. 33689. Convention date, Dec. 31, 1931. Addition to 399,501. [Classes 38 (iii) and 38 (v).] A control arrangement for an electric motor driving a plant for reconditioning starch, after its use for moulding marchmallows, &c., as described in the parent Specification, comprises a pair of spaced rotary shafts 52, 53, Fig. 6, a pair of cams 90, 91, Fig. 5, on each shaft, axially movable bars 100, 101, positioned between said shafts in alignment with the said cams to be reciprocated thereby to operate a control switch for the motor, and a switch controlling electromagnetically actuated clutches 56 between a lag motor 61 and the shafts 52, 53. A motor 40, Fig. 1, drives the moulding machine 1 through a clutch operated by a push-bar 42, and with the bar 42 moved to the position shown in Fig. 2, a switch 150 is positioned to energise the lag motor 61, and a solenoid 76, the latter clutching the motor 61 to the shaft 52, which is rotated against the bias of a weight 80, and, after a time, operates switches 54, 55 by means of the cams 90, 91, the switch 55 starting the motor 30 driving the reconditioning apparatus, and the switch 54 de-energising the solenoid 76 and motor 61. The shaft 52 is returned to its initial position by its weight 80. When the bar 42 is moved to unclutch the moulding machine, the switch 150 is positioned to energise the solenoid 77 and the lag motor 61, the former clutching the motor 61 to the shaft 53 which is rotated against the bias of a weight 80, and, after a time, operates the switches 54, 55, by means of cams corresponding to the cams 90, 91, the switch 55 stopping the motor 30, and the switch 54 de-energizing the solenoid 77 and the motor 61, the shaft 53 being returned to its initial position by means of its weight 80. If the bar 42 is not kept in a position for clutching or unclutching the moulding machine for a certain time, the lag motor 61, and the corresponding solenoid 76, 77, are de-energized so that the shaft 52 or 53 is returned to its initial position by its weight, and the full time interval is always obtained. The switch 54 is a two-way switch having a pivoted movable member constituted by two U-shaped conducting pieces 119, Fig. 7, and a U-shaped insulating piece 122 carrying the movable contact 123 which bridges fixed contacts 115, 116. The switch 55 is similarly constructed but arranged merely to open and close the circuit to the motor 30. Both of the switches 54, 55, have a snap action provided by a spring passing over the pivot centres 120. Used starch from the moulding machine 1, Fig. 1, is transferred by a conveyer 3 into a cleaner 5 provided with a rotary screen 6. From the cleaner it passes into a drier 8 provided with steam pipes 10, from which it is conveyed by a conveyer 21 into the moulding machine. Air is drawn through a pre-heater, the cleaner 5, and the drier 8 by a fan 26.