Patent GB-238312-A (GB)
Title: Improvements in dish-washing machines
IPC: A47L15/23
Filed: 1924-05-21
Abstract: 238,312. Couch, E. Le R. May 21, 1924. Plates, dishes, and the like, washing. - The dishes are placed in a casing and upon closing the door of the casing an electric motor is started to rotate a pump, lock the door and operate valve mechanism so that washing and rinsing fluids are supplied to oscillating-spraying members within the casing at predetermined periods and removed during the intervals between these periods. At the end of the cleaning operation the door is unlocked and the motor .automatically stopped. The wire-work basket 109 has plate-supporting means 111, 112 and is supported by brackets 108 projecting from the side walls of the casing 20. Closing the door 22 of the casing pushes back a locking bar 87 carrying a circuit-closing member 97 which then connects contact members 98 in circuit with a motar 50 so that the motor is started. A worm 52 on the motor shaft 51 drives a worm-wheel 53 mounted on a shaft 54 having a worm 55, Fig 5, driving, by a worm-wheel 56, a shaft 57. On the shaft 57 are two cams 59, 60 and a gear-wheel 78 driving a gear-wheel 79 having a, cam 80. This first comes into action to release a spring-pressed rod 81 mounted on the rear of the casing and engaging at its apertured end 86 the toothed end 88 of the locking bar 87 so that the rod 81 is pulled down by its spring 84 and the bar 87 holds the door 22 locked. Then the cam 60 raises a rod 70 to rock a shaft 74 and open a supply valve 38 so that hot water is supplied through a pipe 39 to a chamber 37 fixed to the rear wall of the casing and communicating by pipes 43, 44 with the centrifugal pump 45 and by a passage 27 with the spraying members 28, 29. The valve 38 remains open for fifteen seconds to prime the pump, which is driven direct by the motor 50 and communicates by a pipe 45a with the lowermost part of the sloping floor of the casing 20. For the next thirty-five seconds the water, mixed with washing powder which has been placed in the casing with the dishes, is circulated by the pump through the spraying members. The cam 59 then rocks a flap valve 49 from its seat 48 on to its seat 47 thus cutting off the pump from the chamber 37 and putting it into communication with a drain pipe 46, 21 which may drain into a sink so that. the pump empties the casing 20. This draining operation takes five seconds, and the flap valve 49 is then, returned to its seat 48; the valve 38 is again opened for 15 seconds by the cam 60 to supply hot rinsing water; this water is controlled for 35 seconds and the flap valve is again moved on to its seat 49 for draining. The cam 80 then lifts the rod 81 so that the locking bar 87 is released and moves forward under the action of its spring 89, breaking contact between the members 98 thus stopping the motor and leaving the door 22 free to be opened for removal of the dishes. During the operation of the motor 50 the spraying members 28, 29 are continuously oscillated by a disc 101 on the shaft 54 having a pin 102 engaging a slot in a pivoted arm 104 carrying a gear sector 106 meshing with a gear wheel 107 secured to the spraying members. The forward ends of the spraying members 29 are closed by bayonet plugs 30 and connected by a ring 33 supported on rollers 34.