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Two New Dyson Products of Outstanding Interest

18th October 1935
Page 59
Page 59, 18th October 1935 — Two New Dyson Products of Outstanding Interest
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A 40-ton Eight-wheeled Bogie for Heavy Haulage and a Tractor-tanker for the Bulk Transport of Beer

ACCOKPANYING illustrations show two interesting outfits which have recently been completed in the Liverpool works (76-80, Grafton Street) of R. A. Dyson and Co., Ltd. One of them comprises a special 40-ton bogie built for the transport of heavy girders, boilers, etc., a specialized class of work which is undertaken by Messrs. Isaac Barrie, 32, Midland Street, Glasgow, to whom the machine has been supplied.

It will be seen from the picture that the front end of the load is supported on a turntable on the prime-mover, w hilst the rear of the load rests on the Dyson bogie. The bogie is adjusted so that only the minimum weight required for adhesion is superimposed upon the lorry, the main part of the weight being taken by the bogie. The outfit thus, in effect, becomes an articulated vehicle and can be handled quite easily. Be suitable positioning of the bogie, it can be made to track fairly accurately with the tractor portion.

The bogie is of the eight-wheeled type, each wheel carrying twin solid

tyres of 770 mm. by 140 mm. dimensions. The wheels are mounted in pairs on short axies carried On Wbodhead trunnion-ended springs, 50 that each axle can oscillate and allow the wheels to adapt themselves to road camber and other irregularities. In addition, the springs on each side are connected by a balance beam rocking in a pressed-steel housing. By this means, proper distribution of the load is obtained over each pair of axles, and the oscillation of the axles themselves ensures correct load distribution over each wheel.

The four rear wheels of the bogie have 20-in, internal-expanding brakes, which are operated by twin Dewandre vacuum cylinders connected to the lorry, so that the driver has the power operation of these brakes under his control. The brakes can also be operated by a hand wheel and screw.

Another interesting feature of the design is the three channel-steel crossmembers fitted across the top of the Logic, and, in the case of the boiler shown in the picture, timber hearers were made to support it and fitted into the crosssinembers, thus giving a firm cradle for the load.

The bogie is provided with a drawbar, so that it can be towed from site to site when empty. When a load is being carried, the drawbar is lashed to it and is not used to transmit the pull, hut merely serves to keep the centre line of the bogie coincident with the longitudinal centre line of the load.

In the illustration depicting the use of this bogie the load being dealt with is 47 ft. long, 12 ft. in diameter and weighs 39 tons.

The other illustration shows a tractor-trailer outfit supplied to a wellknown brewing concern for the bulk transport of beer from the brewery to the bottling stores. It consists of an International pneumatic-tyred tractor, with an enclosed cat), and a Dyson sixwheeled pneumatic-tyred trailer carrying a 60-barrel (2,1.60 gallons) Pfaudle.r glass-lined tank manufactured by the Enamelled Metal Products Corporation (1933), Ltd., of Leven, Fife. The tank is insulated with cork 2 ins. thick.

The building of the trailer gave riseto 'Several interesting problems. The total weight of the beet, tank, bolster, etc., amounted to over 131 tons,, so that it was necessary to produce the trailer. with a tare weight of less than three tons. Special lightweight construction was, therefore, adopted, and the chassis frame wa.s•constructed from Chromador steel, which has a highet tensile strength than ordinary rolled

steel channel. This enabled lightet sections to be used for the frame and, coupled with the employment of steel pressings for the rear carriage and' tubular cross-members, made it possible for the weight to be kept within the required limit.

The trailer is of the six-wheeled type, with four wheels in line at the rear, and it is equipped with 38-in. by 9-in.

India tyres. It has brakes on the four rear wheels, the actual friction area being more than 500 sq. ins. The brakes are applied by twin ClaytonDewartdre vacuum cylinders, controlled by a valve in the cab of the tractor, whilst they are also capable of being applied by cable..

Two outfits of this kind have been supplied to the operator. The tractors have buffer equipment, so that they can shunt railway trucks on the sidings of the operator. The trailers are constructed so that the' tanks and bearers are easily removable, thus allowing the chassis, if necessary, to be fitted with flat platform bodies.

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People: Isaac Barrie
Locations: Liverpool, Glasgow

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