Patent GB-513540-A (GB)
Title: Improvements in dish washers
IPC: A47L15/23
Filed: 1938-04-12
Abstract: 513,540. Dish-washing machines. BENNET, C. W. H. D. April 12, 1938, No. 11194. Convention date, April 12, 1937. [Class 138 (1)] In a dish-washing machine of the kind having a movable cover and movable spraying pipes adapted to be supplied with washing liquid by a valve, the cover and valve are connected to a common operating member which when moved in one direction first closes the cover and then opens the valve and when moved in the opposite direction first closes the valve and then moves the cover to an open position. Preferably, the spraying pipes also are connected to the operating member, so that after the cover is closed and the valve is opened the spraying pipes may be oscillated by further movement of the member. The casing comprises a lower fixed portion 16, Fig. 1, and an upper portion 17 pivoted thereto in line with the pivot of a lever 27. A plurality of water spray pipes 9, 18 are supplied with washing liquid via a control valve 20, Fig. II, actuated by a link 24 and arm 44 on a shaft 35 provided with an operating handle 43. The shaft carries an arm 36 in which is secured a bar 33 parallel to the shaft 35 and co-operating with a lever 27 linked to the lower sprayers, a lever 37 linked to the upper sprayers, a cam surface on a pivoted arm 34, Fig. IX, co-operating with a lug 39 on a pipe carrying the cover. To this pipe is also secured an arm 38 urged by a spring 40 in a direction to raise the cover. A block of soap 54, Fig. X, is contained in a casing 51 having a communication 46 from the liquid supply piping on the apparatus side of the valve, a control ball 48 co-operating with an adjustable stop 49 to limit the rate of flow into the soap container while allowing free flow in the opposite direction, and a screen 52. Small articles to be washed are placed'on a screen 13, Fig. I, with small meshes, and large articles on an upper grating 14 having large openings. In operation, with the cover open and the handle 43 raised and the valve, therefore, closed, articles to be washed are positioned on their supports. The handle 43 is then swung downwards, the bar 33 swinging the arm 34, and thus the lug 39, to close the cover. When the cover has been closed further movement of the handle opens the valve and admits liquid to the sprayers, still further movement of the handle swings the sprayers through 90 degrees against springs. The handle may be oscillated to spring the sprayers to and fro. When washing is complete, the handle is lilted, first releasing the levers 27, 37, then closing the valve 20. As soon as this valve is closed, liquid which has entered the casing 51 while the valve was open flows out by the pipe 46, and partially fills the pipes supplying the sprayers, so that this soapy water is the first to be ejected when washing recommences. Further movement of the handle raises the cover by contact of the bar 33 with the arm 38, and allows the washed articles to be removed. The edge of the cover lies within but clear of the edge of the lower part of the casing. Water jets are, however, so arranged to form a screen of sprayed liquid at the gap.