Patent GB-190925591-A (GB)
Title: Improvements in and relating to Stacking and Elevating Devices for use in connection with Threshing Machines and the like.
Inventor: ROSENTHAL AUGUST
IPC: A01F17/02
Filed: 1909-11-05
Granted: 1910-06-23
Abstract: 25,591. Rosenthal, A. Nov. 5. Ratchet elevators.-A stacker having reciprocating elevating-members, and capable of being turned to work at different angles and heights, and of being folded when not in use, is attached to the rear of a thrashing-machine, ensilage-cutter, &c. A rectangular frame 15 is pivoted on vertical bolts 16, and carries a shell 20 on horizontal bearings 19, the base of the shell being curved about the centre 19 and overlapped by a curved plate 21 fixed to the frame 15. The upper edge of the plate 21 is covered by a plate 23 attached to side-plates 24 attached to the thrashing-machine, &c., a flexible extension 25, attached to the frame 15, passing outside the plate 24 and being again overlapped by an external plate 26. The upper plate 27 attached to the side-plates 24 converges in width toward the pivot 16 and rests on ties 28 ; and on it slide segmental plates 29 attached to the frame 15. Plates 33 hinged on rods 32, which converge to the pivot 16, rest upon the ridge-shaped top 34 of the stackercasing 20. Journaled at 19 is a double crank-shaft 40 carrying one end of the rods 41, on which are mounted teeth 42, hinged so as to give way on the return stroke. The other end of the rods is pivoted to a block 45<1> sliding in guides 36<1>, and is attached by the pivot to other rods 45, which have similar teeth 46, and which extend nearly to the top of stacker, their upper end being attached to bolts sliding in slots in the casing. The crank-shaft is driven from a shaft 78 mounted on the top of the frame 15 ard coupled by a universal joint 80 to a shaft, which is mounted on the fixed beam 14<1> and carrying a belt pulley 82. To prevent vibration and jolting owing to the variation of load on the rods 41 during each revolution, a cam is so arranged on the crank-shaft that. as the cranks pass the dead-point, the cam compresses a spring and releases it during the working stroke. The upper part of the stacker is hinged to the lower on the pivot 37, and is secured by a catch 51. For folding, the stacker is secured in its raised position by the hooked rod 72 being engaged with the loop 75. The two rods 41 are then brought into the position in which the two blocks 45<1> are at the same point in the guides beneath the pivot 37, in which position an aperture in a wheel on the crankshaft 40 is opposite to a projection on one arm of a bell-crank lever, the other arm of which is attached to the catch 51. When the projection is moved into the aperture to release the catch, a pin is placed behind it to prevent release of the shaft while the catch is open. The pin also serves to lock the catch. The upper section of the stacker is folded by a cable 63 at each side, connected by cross-bars 64, 65, and attached by a shackle pulley 62 to a double cable 59 which is coiled on a drum 57 operated by chain-gearing from a band-winch with ratchet-wheel and pawl. When the stacker has passed the vertical position, as shown in dotted lines, the cables being in engagement with the pulleys 66, the winch is rotated in the opposite direction to allow it to descend, resting upon the cross-bars 65, 64, to the support 61. In unfolding, the lower part of the stacker is allowed to descend until checked by the cable 68, and the cable 63 is then wound on the drum 57, lifting the upper part of the stacker on the cross-bar until it passes the vertical position, and then allowing it to descend. A sliding door in one of the plates 24 gives access to the interior.