A COMBINED CRANE AND JACK
Page 45
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AN accompanying illustration shows the H.F. Jackcrane, made by Harvey Frost and Co, Ltd., 148-150, Great Portland Street, London, W.1, in its latest form, lowered for use as a
jack capable of lifting from a few inches above floor level, and, equipped as a crane, raised to a height of 7 ft.
The present design incorporates a number of improvements upon the original type, although the price has been reduced to £27 10s. to the trade. The rigidity of the structure has been increased, it is now _provided with a four-point mounting to give it stability without recourse to strew-down steadiers, and several detail modifications make it a superior appliance.
The wide scope of the Jackcrane renders it a valuable piece o4 equipment in any maintenance shop, whilst one purpose for which it is particularly convenient is the handling of the power units of forward-control passenger vehicles, as the jib rises and falls vertically, and, in 'the majority of cases, can lift the engine clear, without fouling the top of the cab.
Its overall height is 9 ft 3 ins., the effective length of the jib 3 ft. 2/ ins., the width over the legs at the front 2 ft. 7 ins, and the capacity 1 ton.