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carrying Concretefor Road Works
Page 126
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MANY unusual vehicles and appliances • have been constructed for municipal duties by Dennis Brothers, Ltd., of Guildford, and the latest product of this kind consists of four machines of unusual appearance which have been built for special duties in the service of Surrey County Council, which has already operated several vehicles of the same make. The latest deliveries are required for use on the council's extensive road maintenance schemes, their first duties being in connection with the repair work in progress on the Kingston by-pass.
Each of the four machines Is designed to carry 4 cubic yds. of liquid concrete, transporting it from the mixer to the stretch of surface under
going treatment, and to deliver it, not in a heap, but spread over a fairly wide area so as to reduce to a minimum the hand labour required to complete the top surfacing.
A rectangular door at the rear controls the flow of the concrete on to the distributing tray ; it is actuated by a handle projecting below the near side of the body. We should mention that the type of distributing tray in use has been mo(lified since the picture which we publish was taken. The handle engages with a ratchet and can be locked in any desired position. A special clamping device is used to secure the door when the machine is travelling.
The approximate inside measurements of the body, which is semi-circular in section and parallel in plan view, are, width, 6 ft. and length 11 ft. 9 ins. The cubic content is actually greater than the load, but a certain margin mast be allowed for surging, and, in addition there are metal splash-plates laid longitudinally above each side, and secured by wing-nuts. Sheet steel of 13-6.-in. thickness is used for the curved part . of the body, a heavier-gauge metal being relied upon at the ends.
Bromilow and dwards, Ltd., Bark Street, Bolton, which supplied the bodies, was also responsible for the tip ping "gears. Ilydraulic mechanism is employed. A specially large pump box, on the near side of the chassis, contains four plunger-type pumps, which deliver to the two triple-extension telescopic rams, capable of elevating the body to , an angle of 60 degrees. Two deflector plates, projecting inwards from the sides of the body at an angle of about ti0 degrees, direct the flow of concrete towards the discharge• aperture.
The chassis of each of these ma-. chines" is a Demiii6-torinerthe Wheelbase model—incorporating a rear axle reduction of 9.66 to 1 (which is slightly lower than the standard ratio).