Patent GB-378417-A (GB)
Title: Improvements in or relating to washing machines, particularly for dishes and the like
IPC: A47L15/24
Filed: 1931-05-07
Abstract: 378,417. Dishwashing machines. HOBART MANUFACTURING CO., Troy, Ohio, U.S.A.-(Assignees of Johnston, H. L. and Meeker, D. A.; Troy, Ohio, U.S.A.) May 7, 1931, No. 13508. Convention date, Jan. 17. [Class 138 (i).] In a machine for washing dishes and like articles, provided with a reciprocating frame and means for feeding racks or carriers intermittently through the machine, a manual control is provided for rendering inoperative part of the feeding means so that a carrier may remain idle although the frame continues to reciprocate. In the construction shown, a housing 13, through which carriers containing articles to be washed are passed, is provided with flexible straps 57 supporting a framework which is used to cause the carriers to advance intermittently through the machine. The framework comprises rails 52 connected to end members 55 and carrying pivoted pawls 60 which are adapted to engage the carriers during movement of the framework in one direction. The direction of travel of the carriers may be reversed by interchanging the two rails 52 with the pawls facing in the reverse direction. The carriers are supported on trackways and are provided with shoes formed with spaced lugs which are adapted to be engaged by the pawls 60. The pawls positioned at the centre of the machine may be rendered inoperative by means of a manuallyoperated lever 75 which, on operation, causes arms 82 to raise the lower ends of the pawls so that the upper ends are withdrawn from engagement with the lugs on the carrier. By this means, a carrier may be held stationary for as long as desired between nozzles 35, 33, for cleansing liquid. The framework for advancing the carriers is oscillated by means of an electric motor adapted to reciprocate a, rod 101, which is connected through a lever 105 and link 110 with the framework. In order that the advancement of the carriers may be automatically suspendedif, for example, an obstruction is met with, the lever 105 is constructed in two parts, as shown in Fig. 5, the upper part 114, which is pivotally mounted on the machine, being connected by a pair of springs 120 to the lower part 117. The springs act to press slotted portions of the member 117 into engagement with rods 115 extending across the member 114. Normally, the parts 114, 117 function as one lever, but if sufficient resistance to feeding movement is encountered relative movement of the parts takes place about one or other of the rods 115. Upon removal of the resistance, the feeding operations continue in the normal manner. In addition to the nozzles 35, 33 for cleansing liquid, rinsing nozzles 135 are provided at the outlet end of the machine. These nozzles are detachable from the union 140 and may be connected to the union 1401 when the direction of movement of the carriers is to be reversed. Rinsing liquid is supplied to the pipe 141 under the control of a normallyclosed valve 143 and a normally-opened valve 257. The valve 143 is opened by means of an arm which is actuated when a carrier enters within the range of the rinsing jets. The valve 257, Fig 10, is inserted in the pipe leading from a source of supply of rinsing water to the valve 143; and is provided with a control lever 159 which normally stands in the path of travel of the carriers as they approach the end wall 132 of the carrier table. When the carriers fill up the space on the table so as to prevent further movement of carriers through the machine, the lever 159 is operated to close the valve 257 and prevent waste of rinsing water. In a modification, shown in Fig. 12, the carriers are supported on a frame 200 which is suspended for oscillating movement. Forward movement of the frame advances the carriers, which are prevented from return movement by their engagement with pawls 212 pivotally mounted on the machine housing. The pawl at the centre of the machine may be rendered inoperative by a manual control. The carriers frictionally engage the frame so that if they meet an obstruction relative sliding movement takes place between the frame and the carriers. If desired, pawls 225 may be provided on the frame to assist in the advance of the carriers, in which case means for suspending the advance in case of obstruction are provided similar to that employed in the construction shown in Fig. 1.