Patent GB-371350-A (GB)
Title: Improvements in or relating to slicing machines
IPC: B26D7/01
Filed: 1931-01-19
Abstract: 371,350. Slicing-machines. HOBART MANUFACTURING CO., Troy, Ohio, U.S.A. - (Assignees of Johnston, H. L.; Troy, Ohio, U.S.A.) Jan. 19, 1931, No. 1733. Convention date, Jan. 23, 1930. [Class 28 (ii).] In a slicing-machine with a disc knife, a foodsupporting carriage reciprocated by hand, and a hand-operated pusher plate which co-operates with an adjustable gauge plate for effecting the slice feed, the pusher plate 71 is so mounted that it may be swung upwardly to a position from which it will return by gravity when released, or when withdrawn from the slicing plane to an inoperative position, it may be swung completely out of the food-supporting trough 60, 61 and retained by a latch 234. In this latter position, the food is pushed by hand along the trough and the trough is grasped to effect the reciprocations of the carriage, a guard plate 237 preventing the operator's hand from contacting with the knife edge. The carriage 52 is guided by a rail 51, steadied by a projecting shoe 78, and prevented from tipping by the engagement of a depending bracket 55 with a rail 57. The pusher 71 has projecting teeth 72 on its front face and teeth 74 on a horizontal extending flange. It is secured to a collar 46 which is pinned at 45<1> to a shaft 45 rotatably mounted in bifurcations 43, 44 in one end of a rod 67, the other end being mounted for pivotal and sliding movement on a guiderod 66 carried by brackets 64, 65 on the trough support 62. The pusher is thus rotatable in the forked end of the rod 67, rotation being effected by the handle 70 which is keyed to the shaft 45, and undesired rotation is retarded by a friction washer 46a and a pressure applying spring 49. The upward swinging of the arm 67 is effected in operative positions of the pusher plate by an extension 226, Fig. 5, of the sleeve 69 engaging with the stationary bracket 64. When the pusher is fully retracted, the end 228 of the extension 226 clears the bracket 64, and the arm 67 with the pusher 71 may be dropped into the position where it is locked by the catch 234. A spring buffer 229 is provided to cushion the fall if the pusher plate is accidentally dropped. The reciprocation of the carriage and the feeding of the food are both effected by the handle 70. The Specification as open to inspection under Sect. 91 (3) (a) includes also the subject-matter described below and the subject-matter described in Specification 371,359. The gearing connecting the motor shaft 17 with the knife 30, Fig. 11 (Cancelled), is enclosed in a housing 16 having removable doors which permit various parts to be disconnected and shafts to be withdrawn. The motor shaft 17 carries a worm 18, Fig. 20 (Cancelled), the shaft having a rib 17<1> on its end which aligns with ribs 18<1> on the end of the worm, the ribs being engaged by a groove 191 in an end cap 19 which is retained by a screw 19a. The knife spindle 21 is journalled on roller bearings 22, 23, the knife end of the shaft having labyrinth packing 37 which, together with a member 38, prevents the leakage of oil from the casing to the knife. The front of the knife is recessed at 30 and is guarded by a plate 34 having a lower flange 168 engageable with adjustable dowel pins 171<1>, and the upper part 173 is screwed to the inspection door 174 of the knife-grinding casing 179. The lower edge of the knife contacts with a scraper 194 pressed against the knife by a spring 195, the scraps from the knife falling into a pan 215 which has its upper edge curved to conform with the curvature of the knife and has a handle 220 which is lifted to disengage the pan from the positioning abutment 221. The rear end of the knife is protected by a guard 183, Fig. 1, secured by thumb-screws, whilst the gap between the gauge plate 98 and the grinder casing is guarded by a pivoted finger 188 also held by a thumb-screw. The slice deflector plate is pivotally mounted so that it may be swung from the operative position into a position which permits cleaning of the otherwise concealed parts. The deflector may be removed from its hinge. The knife-grinding mechanism is contained in a housing 179 which is pivoted to the housing 16 at 316 when the screw 320 is released and the door 174 removed. The housing may be swung backward to give access to the grinding members for cleaning &c. The grinding means comprise a stone 300 and a burr removing wheel 290 having ball bearing journals 286, 287, Fig. 12 (Cancelled), slidable in casings 283, 284. A spring 291 tends to draw the wheel 290 against the flat front side of the knife whilst a spring 301 tends to push the stone 300 against the oblique opposite side. The journals of the stone and wheel carry projecting pins 296, 303 between which is revolubly mounted a cam 280 having a flat 281. The cam is connected to an external operating handle 276 by the engagement of a pin 282 with a slot 2821 in the cam. This connection permits vertical adjustments, rendered necessary by the wear of the knife edge, the adjustment being effected by a screw 270 which slides the grinding assembly along vertical guides in the back of the housing. In the position shown in Fig. 12 (Cancelled), both the wheel 290 and the stone 300 are held away from the knife. By turning the handle 276 the flat 281 may be engaged first with the projection 303, when the stone will bear against the knife, and then with the projection 296, when the wheel 290 will bear on the knife. The stone 300 is arranged at an angle to the vertical which may be adjusted by slacking screw 311 and pivoting the' journal about the axis 308. An arcuate slot 310 in the lug .309 permits this angular adjustment. This subject-matter does not appear in the Specification as accepted.