Patent GB-767934-A (GB)
Title: Improvements in conveyors for mines
Inventor: THOMSON JAMES
IPC: B65G37/00
Filed: 1952-07-26
Abstract: 767,934. Endless belt conveyers. MAVOR & COULSON, Ltd. July 20, 1953 [July 26, 1952], No. 18957/52. Class 78 (1). In a transportable conveyer having a wheeled framework and an endless conveyer belt adapted to convey material from a mine face to a main belt conveyer, the delivery end of the transportable conveyer belt is maintained above and in register with the main conveyer belt as the transportable conveyer is moved to follow the advance of the mine face by an under-carriage pivoted on a vertical axis to the wheeled framework of the transportable conveyer, the undercarriage being adapted to support locally the working run of the main conveyer belt and to ride upon the troughing rollers thereof. As shown, the transportable conveyer consists of a framework 10 mounted on a single pair of wheels 11 running on rails 12 and provided with a driving roller 18, reversing rollers 15, 19, and idler rollers 29, 30, 31, 32 for supporting and driving an endless belt 14. The driving roller 18 is driven from a motor 32 through a fluid coupling. The main gate-road conveyer consists of an endless belt 38 carried on idler rollers 42, 43 on a fixed framework 40. An under-carriage 35 is connected by a universal joint 37 to the framework 10 and rests on some of the troughing idler rollers 42 of the gate-road conveyer, so as t'o maintain the delivery point of belt 14 over and in register with the belt 38, with which it communicates by means of an open-sided hopper 34 fixed to frame 10. The belt 38 at this point is supported on idler rollers 44 on the undercarriage 35. The loading end of belt 14 is fed, Fig. 1c, by a feeder conveyer consisting of a belt 21 carried in a casing consisting of a portion 46 carried on a framework 20, and a portion 45 pivoted to portion 46 at 47 for adjustment in the vertical plane by a screw device 52. Belt 21 is driven from the belt 14 by a driving connection between the shaft of roller 18 and the delivery end roller of the belt 21. Framework 20 is supported on a single pair of wheels 48 running on rails 12 and is pivotally connected by the shaft 28 of guide roller 16 for the belt 14 to framework 10. The frameworks 10, 20 are moved along rails 12 as an articulated unit. A hopper 51 receives material from the belt 21 and delivers it to the belt 14. As shown, the frameworks 10, 20 are in their initial position ready to follow the advance of the coal face 53. The assembly is not fully retracted, extra movement of framework 20 away from the coal face being allowed for so that when the operation of ripping-off the stone roof of the gate-road and erecting fresh arched girders to support the advancing roof is taking place, the feeder conveyer can be moved back until it is clear of the falling stones during this operation. In a modification, Fig. 5, the feeder conveyer is replaced by an extension of the belt 14 first downwardly over the idlers 30 and then horizontally over closely-spaced idlers 64 on a framework 60 supported on a pair of wheels 62 and pivoted at 47 to the framework 20 for adjustment in the vertical plane by a screw device 61.