Patent GB-348023-A (GB)
Title: Improvements in process of washing dishes and apparatus therefor
IPC: A47L15/23
Filed: 1930-01-31
Abstract: 348,023. Washing-apparatus for dishes &c. DWYER, E. J., 463, Appleton Street, Holyoke, Massachusetts, U.S.A. Jan. 31, 1930, No. 3334. [Class 138 (i).] An apparatus particularly for washing tumblers and the like comprises a chamber with a sliding tray 15, on which the articles to be washed rest, and spraying devices 18, 21 above and below the dishes respectively, the liquid draining away at each operation and fresh supplies being used. The spraying devices, which are rotated by the centrifugal action of the liquid, are supplied by water from a pipe 44 and cleansing solution from a pipe 48. The latter is connected to a reservoir 50 and has a check valve 49 to hold back the supply during the supply of fresh water. The fresh water passes through a valve 45 controlled by a lever 46. The valve 45 automatically closes after a predetermined time whereupon the cleansing solution is free to pass into a pipe 20, ready for discharge when the valve 45 is again operated. Thus, at the end of each operation a charge of cleansing liquid is left for the next operation. The spraying device underneath the dishes is preferably constructed as shown in Fig. 4, with one arm having a discharge orifice 22a for rotating the arms and also for spraying, and other orifices 22b, 22c for spraying only. The orifices are arranged at different radial distances, as shown, to sweep out different paths. The lower device is shown with three arms spraying upwardly and the upper with two arms spraying downwardly. It is desirable that the upper device be rotated much more quickly than the lower as it is chiefly for rinsing the outside of the vessels. The soap may be led to the upper rotating sprayer as well as to the lower, but in the case of glass washing at a soda fountain washing the outside with soap is not necessary. Alkalies, such as caustic potash, caustic soda, sodium bicarbonate, ammonia, and lime may be used in addition to the liquid soap. Soap tree bark is stated to allow glasses to dry without spots and without an undesirable glaze. Trisodium phosphate, borax, or sodium borate may also be used. The automatic valve 45 is constructed as shown in Fig. 2. A handle 46 is spring- pressed and carries a cam surface 82 capable of raising a disc 78 to the position shown. The disc is attached by a screwed rod 72 to a plunger 68 working loosely in a cylinder 67. The rod 72 is also attached to a cage 66 carrying a valve 73 with a valve surface 74 for engaging a corresponding seating 75. A ball valve 85 controls the supply of water coming in the direction of the arrows E and passing to the inside of the cylinder 67 through an aperture 86 which is of considerably greater volume than the clearance between the loosely working plunger 68 and its cylinder. After the valve handle 46 is operated as shown, the water passes from the supply pipe through a passage 62 and out of the opening 63. The pressure at the upper side of the valve 73 is greater than at the lower side and tends to close it. This is governed by the dashpot action of the cylinder 67 and piston 68. A modified selfclosing valve acting in analogous manner to that described is also set forth in the Specification.