Patent GB-640879-A (GB)
Title: Improvements in or connected with transporter mechanism
IPC: B66B9/06
Filed: 1948-09-24
Abstract: 640,879. Load-handling machines; winches. TANGYES, Ltd., and REYNOLDS, L. A. Sept. 24, 1948, No. 24972. [Classes 78 (iii) and 78 (v)] In a portable load-handling machine a winding drum is rotated in opposite directions through a variable friction drive by a self-contained power unit and is connected by a flexible member to a load carrier which can be traversed along a rail track to a variable predetermined point at which discharge is effected automatically by continued rotation of the winding drum. The power unit comprises an internal-combustion engine 10 and reduction and reversing gear 11 and, together with a winding drum 13, Fig. 2, is mounted in a trough 9 near the lower end of the framework adjacent to the road wheels 8. The ends of a cable wound round the drum 13 are wound in opposite directions on and secured to drums 14, 16, Fig. 5, fast on a shaft 17 mounted in a wheeled carriage 18. A pair of rockable plates 21, Fig. 3, having peripheral teeth 22 are mounted on the carriage and are engaged by pinions 23 on the shaft 17. A bucket 24 is mounted adjustably by plates 21a, Fig. 1, between the plates 21 which are formed with slots 25 to receive pins 26 carried by spring-loaded levers 27 mounted on the carriage. Latch plates 28, which can be secured to the framework at any point, are provided with inclined slots 29 to receive the pins 26. When the pins enter the slots, the levers 27 are depressed to disengage the pins 26 from the slots 25 and free the plates 21 for rotation on the carriage 18. This rotation occurs when the pins 26 reach the inner ends of the slots 29 thereby arresting the movement of the carriage. Since the drum 13 continues to rotate, cable is drawn from the drum 14 and the shaft 17 and pinion 23 are rotated to tip the bucket. When the bucket is empty, the drive to the drum 13 is reversed. Since the pins 26 are retained in the slots 29 by the surfaces 19 of the plates 21, the carriage 18 cannot move and therefore the initial rotation of the drum 13 draws cable from the drum 16 thereby rotating the pinions 23 and the plates 21. As soon as the surfaces 19 clear the slots 29, the pins 26 pass into the slots 25 and the carriage moves down the framework. The output shaft of the engine 10 is coupled to a shaft 30, Fig. 6, which carries a friction wheel 31 and pinion 32. The wheel 31 is located within a friction drum 33 which contains also a friction wheel 36. The shaft 35 of the wheel 36 is connected by a pinion 34 to the pinion 32. The shaft of the drum 33 is mounted in the end of an arm 38 which is rockable about a shaft 39 coupled to the drum 13. The shaft of the drum 33 carries a pinion 40 which engages a pinion 41 on a shaft 42 mounted at the centre of the arm 38. A pinion 43 on the shaft 42 engages a pinion 44 on the shaft 39. When the arm 38 is rocked by a cable 45 attached to a handle 12, one of the wheels 31, 36 engages the inner surface of the drum 33 and the shaft 39 is rotated in a forward or reverse direction through the pinion transmission mounted. on the arm 38. This arm is urged towards neutral position by pairs of springs 46. An automatic gear-box brake is provided to stop the carriage 18 when the drive is disconnected or in neutral.