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:lectric crane

23rd July 1971, Page 55
23rd July 1971
Page 55
Page 55, 23rd July 1971 — :lectric crane
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wing a load capacity of 1 tonne letric) at a reach of 6ft and 75 tonnes at 8ft the PI ectricrane is produced by dger Equipment Ltd and has a ) per cent greater capacity an the model it supersedes, hile its reach has been 7:reased by 350 per cent. Large ale production has enabled the w model to be produced at a ce that is only 7 per cent more an that of the original ictricrane.

The clear loading height of the me under the hook is 2.29m. nger jibs are available for luced loading capacities.

Basically, the Electricrane nsists of a winch, a rope and hook, power being provided the vehicle's electrical stem. The standard Electrime is equipped for 12V eration, a 24V version being ;o available.

Power from the battery erates a 1 hp reversible avy-duty electric motor, the eed and torque of which itch the requirements of the insmission, winch drum and ick change sheave block. The luction ratio is 240 to 1 which provided by a wormd-worm-wheel and two spur ars.

Manually controlled rotation is wided by a worm-and-ring ar giving a reduction of 120 to Powered rotation will shortly available; prototype powered .ation units are currently being Id tested.

Remote control is through a nd-held, self-centring, threesition switch which actuates solenoids in the control itchgear housed adjacent to the transmission at the rear of the jib. The switchgear is mounted on a panel which can easily be detached by the removal of a nut and a bolt. A key-operated isolating switch is fitted on the transmission unit.

The mast is in two sections, the upper mast being supported on self-aligning bearings at the top and on a 228mm diameter ball bearing at the bottom end. The crane can be mounted anywhere on the vehicle platform by means of four bolts which pass through an anchor plate and the vehicle platform and secure the unit to the main members of the chassis.

Made by: Ledger Equipment Ltd, Airfield Estate, White Waltham, Maidenhead, Berkshire.

Price: £246 (ex-works).


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