Patent GB-190710046-A (GB)
Title: Improvements in Grain Elevators and Weighers.
Inventor: LAKE HAROLD WILLIAMSON
Filed: 1907-04-30
Granted: 1908-04-30
Abstract: 10,046. Lake, H. W., [Bradford, C.]. April 30. Elevators.-Relates to apparatus for use with thrashing - machines for receiving the thrashed grain, elevating and weighing the same, and delivering it into sacks or wagons, and consists in a combined elevator and weigher in which the automatic operation of the weigher is derived from the adjustable shaft of the elevator. The construction of the elevator casing is also described. The elevator, Fig. 1, is attached by brackets 22 to the thrashing-machine. The head of the casing, Fig. 19, comprises a base piece or casting 31 and two cheek pieces 32, and a top and front portion 34 of sheet metal rigidly secured together. To the cheek pieces 32 and to the base 31 a rear portion 35 is detachably secured by bolts 36. A removable cap portion 37, the forward end of which is inserted under the top 34, is formed with an outer overlapping flange and has attached to it flanges 37<1> engaging the inner sides of the vertical portions 32, 35 ; the rear end is secured by a nut 39. The base 31 is formed at the forward end with a diverging inclined discharging-mouth. Ways are formed in the walls 35 and in the base 31 for a sliding bearing in which is mounted the upper shaft 42 of the elevator. This shaft is adjusted to tension the elevator chain by a screw S and is then secured by clamps. The head is secured to the legs 44 by bolts engaging ears formed on the casting 31 and corresponding ears secured to the ends of the elevator legs. The boot 48 may be attached to the legs in a similar manner. The weighing-apparatus. Fig. 5, is suspended on pivots 51 secured to the base 31, and comprises a beam composed of parts 53, a, a scale 110, and a part similar to the part 53 and hinged thereto on the other side of the head casing so that these parts can be separated when the beam is placed upon the pivots 51 in assembling the machine. These parts are then fixed by a pin. The part 53 and the hinged part carry pivots 55 by which the hangerarms 57 of the weighing-hopper 58 are suspended. This hopper is prevented from swinging by a link 59 hinged to it and to the elevator casing. The lever a engages the trip-finger 71 of the mechanism controlling the discharge outlets of the elevator and of the weighing-hopper. This mechanism comprises a shaft 61 integral with a trip-plate 62 mounted in a box-like portion of the base 31 enclosing the bearing of the adjustable shaft 42. Loosely mounted on the shaft 61 is a clutch member 63 continuously driven by spur gearing from the shaft 42 through a floating pinion 65 mounted on a shaft connected by links to the shafts 42, 61. The trip-finger 71 is eccentrically pivoted to the trip-plate 62, and is under the influence of a spring enclosed in housing 78 serving as a guide to the finger ; it also carries a pivoted clutch member comprising a casting 74 to which is secured a detachable adjustable shoe. When the weighing-bucket 58 contains the predetermined load, the arm a rises and releases the finger 71, which is moved by the spring to bring the clutch member 74 into contact with the continuously rotating clutch member 63. The rotation of the plate 61 effects the opening of the gate 84 in the elevator casing by a pin 81 acting in a slot in a link 82 connected to an arm 83. The gate 84 is closed by a spring enclosed in a box 87. On the other end of the shaft 61 is a crank having a pin connected by a link 92 to one arm of a forked lever 93 connected by a slotted link 94 to the gate 95 of the weighing-hopper. The crank-pin is also connected by a link 104 to a tally-box 103 secured to the casting 31. The link 104, which acts in a slot in the tally-box, is formed of spring metal and is curved somewhat so as to throw the tally to its extreme limits and hold it there until the next movement takes place. The scale beam 110 is secured to the part 53 by bolts and is bent as shown to clear the main shaft 42. The sliding weight is formed in two parts clamped to the beam by a thumb-screw. The beam is supported by a rod 112 slidably adjusted in a collar 113 on the casting 31. According to the Provisional Specification, elevators of any desired height may be formed by connecting legs to heads and boots of standard sizes, such boots being preferably constructed of malleable-iron and sheet-metal parts. Two malleable-iron and sheet-metal parts have a narrow sheet-metal strip between them forming the peripheral wall of the boot chamber, and at one side a sheet-metal door is provided opposite the ingress opening. Centrally disposed at the upper side is a cast-metal part carrying bearings for the lower sprocket, the parts being so arranged that the casing can be removed without disturbing the sprocket.