| 摘要 |
1,207,851. Washing machines. ROBERTSHAW CONTROLS CO. 3 Oct., 1967 [3 Oct., 1966], No. 44919/67. Heading D1A. [Also in Division F2] A washing machine control system includes a vacuum source 46 actuated by a programme unit 28, and controlling an actuator 52 which mechanically modifies the action of a component. The tube 12 and agitator 14 are driven by motor 20 via a variable pulley 22, belt drive 25, and transmission 15. The programme unit sequentially controls electrically operated components including the motor. Pulley 22 manually drives the transmission at a minimum speed but can be adjusted by a pivoted lever 35. The lever is raised by the diaphragm 54 of actuator 52 when the vacuum pump 43 is actuated by the unit 28 via cam operated switch 57. The speed of the tub or actuator can therefor be increased during part of the operating cycle. As shown the lever is moved between adjustable stops 39, 40 so that the speed has discreet maximum and minimum values. Alternatively the position of the lever, and thus the speed can be set manually. In modifications the vacuum source may be driven by the motor, or only actuated when the motor is energised.
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