Patent GB-483123-A (GB)
Title: Improvements in or relating to slicing machines
IPC: A63H30/04
Filed: 1937-07-26
Abstract: 483,123. Slicing-machines. HOBART MANUFACTURING CO. July 26, 1937, No. 20609. Convention date, July 28, 1936. [Class 28 (ii)] In a slicing-machine having a rotary knife and a gauge plate for determining the slicethickness, the machine base is formed with a plane top surface 14 which forms an impervious support on which the substance can be bodily moved and sliced when the usual substancecarriage is removed. The base casting is formed with a depressed part 70, 71 under the knife 32, the space between the surface 14 and the knife being filled by an insert plate 74 having a lug 75 at each end, one of which receives a pin fixed in one end of the recess, the other engaging a resiliently held pin at the other end of the recess, this arrangement permitting removal of the insert for cleaning purposes. The insert has a depending flange 80, adjacent to the knife, serving as a knife guard when the part 71 of the recess is being cleaned. The slicetray 13 is slightly dished. The motor 15 is mounted on a support 12, the drive to the knife being through worm gearing. The knife shaft 29 is journalled in ball bearings and has a head 33 to which the knife 32 is secured by screws 34, a protruding part 35 of the head passing into a central opening in the knife. A cap or cover member 36 overlies the screw heads and is secured to the head 33 by a stud 37 permanently secured to the cap. The knife is dished and the cap is of such thickness that it lies in the plane of the periphery. With this arrangement, and with a slow-running knife, excessive rubbing of the substance against the knife is avoided without the use of the usual central knife-guard plate. The motor includes a suitable cut-out mechanism comprising centrifugally actuated contact means which co-operate with fixed contact members in the starting winding circuit of the motor. The substance-carriage 120 is removably attached to a member 96 on a slide 88 reciprocable on a bar 85 and having a neck portion 90 in which is received the shank of a member 91 adapted to slide on a guide bar 87. Irregularities in the guide means are compensated for by slight rotary movements of the member 91 in the neck 90. The space 89 contains lubricant and the bars 85, 87 are lubricated therefrom by wicks. A tail part 103 of the carriage 120 is forked to engage a headed pin 100 on the member 96 and the tail 103 is clamped in position by a plate 110 and screw 113. The pusher plate 125 is pivoted on the arm 126 which is itself pivoted on the rod 127. A member 136 carries a cross bar 137 to which the gauge plate 135 is adjustably secured by bolts 138, adjustment of the plate 135 being necessary when the diameter of the knife is reduced by constant grinding. The member 136 passes through the vertical wall 139 of the base and is preferably integral with a slide 140, having a groove 141 in which the tongue portion 147 of a plate 145 engages, the plate being provided with a screw 148 which bears on an inclined surface on the underside of the table 14, to permit the plate 145 to be moved, for adjustment of the guide surfaces. The plate 145 is then clamped in position by bolts. The movements of the gauge plate, which are in a direction inclined away from the knife, are effected by a pivoted handle coupled to the slide by a connecting rod. A grinder mechanism is mounted upon the motor, means being provided for preventing the engagement of either of the grinding wheels with the knife unless the bolts 43, 44 are loosened and the cover 45 swung upward to open position. The bolts 43, 44 form supports for the upper ends of front and rear knife guards, and a cross-guard protecting the top of the knife is also supported on the bolts. The rear knife guard is provided at its lower end with a socket which fits over a pin on a block adjustable towards and away from the knife edge, and at its upper end with a fork which embraces the bolt 44. A slice deflector 62 is pivotally mounted on a stud 60.