The Mechanical Handling and Storing of Material

COLLIERY TIPS OR TIPPLERS 591 It is claimed that thereby the diameter is decreased, the cost of construction reduced, and the durability of the tippler enhanced. It has a tipping capacity of eight tubs per minute. The tippler is also fitted with an ingenious arrangement which holds the tub in position in the cage by a system of automatic claws that grip the spindles of the tubs. This arrangement is perfectly automatic, and consists of four claws in each of the two compartments. When the tippler is empty for the ingress of a tub, these claws are backed clear out of the way, but as soon as the tippler commences to revolve, the claws immediately move out and tightly grip the tub till it again reaches a horizontal position, when they automatically release their hold. Sam’s Coal Tippler.—The “Sam’s” coal tippler is a modification of the tip previously described, and combines the simultaneous handling of three tubs, so that the speed at which each tub is unloaded does not exceed the speed at which ordinary tubs are cleared. It is built by Messrs Heenan & Froude, Ltd., and has several excellent features. It has hitherto only been used for emptying colliery tubs, but there is no apparent reason why it should not be built on a scale large enough to take standard gauge railway trucks. This appliance is illustrated in Fig. 835, from which it will be seen that the tippler