Patent GB-190613963-A (GB)
Title: Improvements in Conveyors.
Inventor: MCCABE WILLIAM LEGGETT
Filed: 1906-06-18
Granted: 1907-04-04
Abstract: 13,963. McCabe, W. L. June 18. Conveyers.-Relates to portable conveyers of the endless-belt type described in Specification No. 20,637, A.D. 1899. The trolly carrying the conveyer consists of girders 4, 6 sliding upon one another and secured by clamps 8. The extension and contraction of the girders is effected by an arrangement of ropes and pulleys operated by a handle 18. Castors 5, 7 carry the girder sections. The rear swivelling castors 7 are linked by bars 17<1> and are kept in position by ropes controlled by pawl-and-ratchet gear on a shaft 20. Standards 24 are pivoted to the trolley which, when vertical, are directly over the castors 7 and are braced in that position by ties. The conveyer framework 1 is pivoted to the shaft 2 carried by the trolly, and is provided with a bearing-plate 37 sliding on a shaft 30 moving in vertical slots in the standards 24 and mounted in bearings integral with the frames of the suspended sheaves 31 of differential pulley tackles. The double sheaves of these tackles are carried at the head of the standards 24, and the conveyer frame resting on the shaft is raised into an inclined position by operation of endless chains 35. The girders 6 of the trolly have depending bars 39 with cross-bars which carry preferably an electric motor 41 driving a sprocket 44 on the frame 1 through a chain 43 tensioned by a tie-rod 47. On the shaft of the sprocket 44 are other sprockets, over one of which passes a chain tensioned by an adjustable pulley 58. This chain is endless and passes round one of two sprockets on a shaft 53, according to the speed desired. The shaft 53 carries a driving-pulley 62 over which passes an endless belt 63 to the end drum 64. This drum comprises an end and central members 65 of polygonal section, to which are bolted cylindrical wooden segments 68 by bolts 69 enclosed by metal rings 70. The members 65 have pins which fit recesses in the segments 68. The segments 68 have a central depression in which sits the driving-belt 63, so as not to interfere with the carrier belt which also passes round the drum. The belt 63 is tensioned by an idler drum 80, and is guided into the recess on the driving-drum by sheaves with grooved peripheries sliding on vertical shafts. The other end of frame 1 carries an idler drum similar to the driving-drum but without a recess for the driving-belt. The belt is carried on the upper arm by drums 94 and guided by vertical rollers 100, Fig. 23, having flanges which prevent the belt from rising. On the lower run, longitudinal strips of semicircular section are provided. The bearings of the drums 94 consist of base portions 103, Fig. 12, and upper portions 107, Fig. 15, having inwardly projecting pins 106 which serve to secure a liner or sleeve 111, Fig. 16, in which the shaft of the drum revolves. To prevent backflow, the belt, Fig. 27, is provided at intervals with cleats formed of strips a, b, c of elastic material secured to one another and to the belt. A retaining-rod g prevents too free play of the strips. A small and similar conveyer 113 is attached to the main conveyer at the lower end by rods 121 adjustable in length and is driven therefrom by connecting-chains 116. Buffers 132 are provided at the upper end to prevent injury when resting against buildings. The framework rests when lowered upon a bracket 25, and is provided with side guides 129 adjustable laterally according to the size of the articles being carried.