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U.S. Fan Drives
Page 57
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AS a result of a recently concluded _ agreement between The Holset Engineering Co. Ltd., Turnbridge, Huddersfield, Yorks, and the Schwitzer Corporation of Indianapolis, Holset is to manufacture and market thermostatically controlled fan drives in the U.K. These units are already fitted as standard to vehicles manufactured in the U.S.A.
Two types of unit—they are generally called modulated fan drives—are available. The first uses the engine coolant temperature to regulate the fan speed whilst the second uses the temperature of the air after it has passed through the radiator, In both cases the control element is integral with the drive and no external controls or power sources are required.
The drives operate on simple principles. Torque is transmitted from the input shaft to the fan by the shearing of a fluid film between input and output plates in a fluid-filled housing. The control element which reacts to changes in engine coolant or air temperature (depending on the type used) varies the 'fluid 'film thickness between the plates and so varies the fan speed.
This modulated fan drive permits significant reductions in power consumption. It has been compactly designed so that it is interchangeable with conventional fans.
Easier Delivery
A COLLAPSIBLE trolley is now being manufactured by Lassman and Co. Ltd., 306 Kilburn Lane, London, W.9. Made of 0.5-in. plywood on hardwood framings it measures 2 ft. by 3 ft. 4 in. when Tully open and can be bolded to half this size. Eight rubber-tyred castor wheels clip into sockets in the frames when the trolley is required for use and fit into clips underneath the trolley platform when it is collapsed. The trolley can be manceuvred easily up and down kerbs and doorsteps.
A folding handle which also folds inside the framework extends to 2 ft. 9 in. and at one end of the unit a carrying handle is fitted on the end of one frame.
Loads of up to 2 cwt. can be carried on the trolley, which costs £7 10s. Delivery is eight to 10 weeks.
All Sections Listed .
1-1. A DIRECTORY just published by 'the
Garage Equipment 'Association, 11 Ironmonger Lane, London, E.C.2, contains a concise. but complete description of the types of equipment made by all manufaCturing sections of the Association and also lists of distributors. The latter are included according to town and divided into three sections—general, electrical and tyre.
There is also a directory Of trade names and a section listing productsshowing their manufacturers. An equipment survey also contained in the book shows what is required for particular aspects of maintenance and overhaul work explaining the purpose for which it is intended and why it is required.
Buyers' Guide
A COMPREHENSIVE guide to British FA plastics materials and machinery and equipment for the industry has been published by the British Plastics Federation, 47-48 Piccadilly, London, W.I.
The Guide is divided into two parts, the first which deals with materials being the one of interest to the commercialvehicle industry. This is divided into six sections dealing with such things as plastics materials (including resins and polymers), moulding materials and sheets, rods and tubes.
At the end of the book there is an index of trade names. The price is 12s. 6d. post free.