Patent GB-498943-A (GB)
Title: Improvements in or relating to machines for washing dishes and the like
IPC: A47L15/24
Filed: 1937-10-23
Abstract: 498,943. Step-by-step conveyers; washing dishes. HOBART MANUFACTURING CO. Oct. 23, 1937, No. 29007. Convention date, Oct. 24, 1936. [Class 78 (i)] [Also in Group XXIII] In a machine for washing dishes, the dishes are propelled through the washing chamber by members, one group of which is periodically moved forwardly and upwardly into contact with the dishes and then returned, and another group of which is alternately moved forwardly and upwardly into contact with the dishes and then returned. The dishes are carried by frames 64, 65, Fig. 8, each of which consists of a series of parallel bars. The bars 66, Fig. 4, of the frame 64 are secured to transverse beams 67, the ends of which are rounded and mounted in bearings in shoes 70, Fig. 21, slidable along parallel rails 69. An arm 74 extending from one end beam 67 is connected by a member 73 to an oscillatable member 96 which is pivoted on a fixed shaft 98. The member 96 is formed with guide surfaces 100, Fig. 6, for a sliding block 101 which is mounted on a rotatable eccentric member 102 fixed on the shaft 92. The bars of the frame 65 are supported in a similar manner, and are driven by an oscillatable member 97, the eccentric of which is displaced 180‹ on the shaft 92 from the eccentric 102. The frames are raised and lowered by cams 108, 108a, Fig. 4, which work in a lubricant receptacle 109, Fig. 5, and bear against rollers 110 mounted in the lower part of push members 112. A shield 112a prevents the falling of rinsing water into the chamber 109. The upper end of each push member is pivoted to an arm 113 fast on a shaft 114. Arms 115 on the shaft 141 are pivoted to the supporting rails of each frame. Dish supporting members, consisting of spaced strips 129, Fig. 18, held together by spools 130, are arranged end to end between laterally spaced side portions 125 of the bars 66, and are retained by projections 131. The discharge end of each bar is provided with an extension to which is pivoted a tapered shoe 137 having a foot 138 in contact with the plate 139. The dishes are pushed by the shoes to an inclined guideway 140 from which they may be picked up. In a modification, the dishes are delivered to a conveyer outside the machine in which one group of bars has an up and down motion only. The dishes are inserted into the machine through an opening 13, Fig. 13, in the cover 14 closed by a flexible curtain, and are conveyed past a pair of flexible curtains 54 through a washing compartment 11 in which they are cleansed by sprays of washing liquid directed on to them from distributers 16, 17. From the washing compartment the dishes pass by flexible curtains 55 into the rinsing chamber in which water is sprayed on to them from pipes 46, 47. They are then conveyed past flexible curtains 56 into a chamber 58 where they are sprayed by hot water issuing from pipes 59. The supply of hot water is cut off automatically when the conveyer is not operating. The motor 20 and pump 19 by which cleansing liquid is supplied through the pipe 18, Fig. 2, to the distributers 16, 17 are arranged in a compartment 24 provided below the lower wall 25 of the washing chamber. The inlet side of the pump communicates by a pipe 31 with a tank 30 to which the water passes from the dishes through an inclined screen 35. Any material which collects on the screen is washed towards the front of the machine and removed by a scraper through an aperture closed by a hinged door 43. The pump for supplying the rinsing water also is arranged in the compartment 24, and its rotor is fixed to the rotor of the pump 19. The supply of washing-liquid is replenished periodically from the rinsing tank 51 by a bucket 148 mounted on one of the conveyer frames and having a restricted outlet. Water is supplied to the bucket 148 by a pipe 150.