Patent GB-368839-A (GB)
Title: Improvements relating to slicing machines
IPC: B26D7/32
Filed: 1930-12-12
Abstract: 368,839. Slicing- machines. BERKEL & PARNALL'S SLICING MACHINE MANUFACTURING Co., Ltd. and THOMAS, H., Aden Road, Ponders End, Middlesex. Dec. 12, 1930, No. 37517. [Class 28 (ii).] A slicing-machine has a normally stationary slice-receiver which is adapted for movement away from its slice-receiving position to an unloading position for safe removal of the slices. As shown, the invention is applied to a machine having a rotary disc knife which moves bodily in an orbital path, such a machine being described in Specification 205,331, [Class 28 (ii), Kitchen and like appliances &c.]. In Fig. 1, the cutting plane is represented by the line S-S, the knife being enclosed in a housing 10. The slice receiver comprises a trough member 11 pivoted at 16 to the housing 10, the portion 18 extending into the opening in the housing through which the loaf passes, nearly to the cutting plane S-S. The guard 12 comprises bars held by end members 13, 14 and is pivoted to the housing at 19, the hinge pin passing through slotted lugs 14a so that when the pin is partially withdrawn against spring pressure, the hinge is disconnected and the receiver and the guard are free to pivot bodily downwards about the hinge 16, the guard thus being removed from the path of the normally inoperative knifegrinding handle X. The receiver and the guard are interconnected by linkage 21, 23 so that when the guard is swung up on its pivot 19, the receiver swings down on its pivot 16, thereby exposing the slices for removal. The portion 18 of the receiver swings up into and closes the opening in the housing, thereby guarding the knife. The slices, as they are cut, are piled against a support 30 having webs 31 from which pins 32 project. These pins pass through inclined slots 33 in hook-like parts 34 integral with a member 36 slidable on one upright wall of the trough 11. The support 30 is maintained in a slightly inclined position by pins 40, and the member 36 has an adjustable friction-spring device which contacts with the guide wall and provides a frictional drag as the slides push the member along the trough. When the trough is swung down for the removal of the slices, the support 30 swings clockwise as seen in Fig. 1, and jams the member 36 against further movement. A limit stop 42 may be provided. The slice support shown in Specification 326,084, [Class 28 (ii), Kitchen and like appliances &c.], may be used. In the modification shown in Figs. 4 and 5, provision is made for switching-off the driving-motor and applying a brake to the working parts during the displacement of the slice receiver to the sliceremoving position. The receiver again comprises a trough-like member, but the front wall 51 is higher than the rear wall 53 and closes the guard 54 which is substantially of inverted L-formation. The receiver slides on rods 60, 62, and is removed from the operative position by an initial sliding movement and then by a swinging movement as shown by dotted lines in Fig. 5, the amount of the swing being determined by a rod 61 which co-operates with an arcuate slot 66 in a bracket 64a. As the receiver swings, a fly-lever 70 falls over and closes the aperture in the knife housing, and retains therein the last-severed slices. The receiver is actuated by a handle lever 80 pivoted at 81 and having an extension 80a which controls the brake-control levers 83, 84. The knife shaft is provided with an arcuate weight to counterbalance the eccentrically mounted knife. A brake shoe is normally kept removed from the arcuate weight by levers which are locked by the levers 83, 84 whilst the handle 80 is in the position in which the receiver is in the operative position. A spring constantly tends to apply the brake shoe, and when the roller 82 on the handle 80 is removed from the levers 83, 84, the locking-connection is broken and the brake.is applied. The levers 83, 84 are also connected through trip-linkage with a tumbler switch so that the motor circuit is broken as the brake is applied, this triplinkage being also connected with a guard enclosing the loaf-loading position, e.g. a guard such as described in Specification 351,134, [Group XXIV], so that if this guard is displaced the switch and brake are operated. As shown in Figs. 4 and 5, a tumbler switch 90 is continuously pressed downwards to the " off " position by a spring plunger 89, but is retained in the " on position whilst the receiver is operated by a latch 86 formed on the handle 80. The latch 86 is formed with two apertures which are engaged, one at a time, by a spring- pressed plunger 93 which is pivoted to a lever 96. The lever 96 co-operates with a stationary roller on the knife housing in such manner that when the receiver is in its operative position, the plunger 93 engages with one of the apertures in the latch 86 and retains the handle 80 in the operative position. When the receiver is withdrawn, the handle 80 is turned clockwise until the plunger 93 falls into the other aperture in the latch 86. During this movement, the latch 86 moves clear of a stop 87 and leaves the receiver free to be slid along the rods 60, 62, and the switch 90 to fly to the " off " position. The receiver is locked in its withdrawn position, to render knife-grinding safe, by a spring latch 100 which snaps into a slot 104. In a further modification, the slice-receiver is mounted to pivot on a vertical axis to a slice-removing position, and both ends of the receiver may be adapted to co-operate with the aperture in the knife housing. Spring-locking means are provided, and the guard is pivoted to the knife housing by a pin which is removed to permit the guard to be removed during knifegrinding. A receiver assembly pivoted on a vertical axis may have a number of receivers on it arranged radially in " turret" fashion, or they may be mounted in wheel form and pivoted on a horizontal axis, each receiver being positioned by a dog-clutch device which has inclined teeth so that as the wheel formation is revolved, the receiver is withdrawn from the housing.