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The Modern Gully Emptier—

2nd December 1932
Page 65
Page 65, 2nd December 1932 — The Modern Gully Emptier—
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features that make for efficiency and economy

THE modern gully emptier offers numerous advantages to municipal authorities, as it enables the work of gully cleansing to be tackled in a highly sanitary and economical way. Such appliances have reached a high stage of development, as is clearly borne out by a machine that has recently been supplied by Dennis Brothers, Ltd., Guildford, to the order of the cleansing superintendent of Newcastle-on-Tyne, the appliance embodying certain features built to meet the special requirements of the locality.

The basis of the machine is a standard Dennis pneumatie-tyred 6-tonner, with a wheelbase of 14 ft. The tyre dimensions are 40 ins. by 8 ins., a mechanical pump for their inflation being ;fitted forward of the gearbox, where it is driven through a dog clutch at the front end of the layshaft. This pump is water cooled, pipes connecting with the radiator.

The rotary air pump, which is employed to create a vacuum or pressure in the tank, is mounted direct on the gearbox and is driven from the constant-mesh gear on the layshaft through an idler wheel. A further pump, which supplies the pressure for the hydraulic tipping gear, is carried on the near-side frame member, being chain driven from a sprocket incorporated in the universal joint at the front end of the gearbox primary shaft The tipping gear is a single hydraulic ram with double extension, and it can raise the tank to an angle of 45 degrees.

So that the machine can be used for street watering and washing, a multi

stage turbine pump of fire-engine pattern is mounted forward of the engine, and this is capable of delivering water at high pressure to the four delivery heads, two being designed for watering and the others for washing.

The cylindrical tank has a total capacity of 1,100 gallons, and the whole of the rear forms the emptying door.

Iu the past it has been , customary to devote much more space to the conveyance of sludge than to clean water,

hut the, new machine for Newcastk gives the unexpected proportion of .f* of sludge to one of clean water.

It must be understood that it is intended to empty the machine only once daily, and the total weight of solid sludge which can be collected during a day's work is, on the average, 21 tons. In addition, of course, a large amount of liquid sludge is also taken on board.

A transverse partition divides the tank into sections of 600 gallons at the front end for clean water for sealing the gullies and 500 gallons at the rear for solid and liquid sludge.

A certain amount of the water forming part of the liquid sludge is used to stir up the gully contents. By means of valves, the action of the vacuum pump is reversed, causing air pressure to build up in the top of the sludge compartment. On opening, for a few seconds, a valve near the top of the main suction pipe, a heavy stream of water is expelled.

Two fills per day of the clean-water compartment are sufficient for an average day's work. A spring clip is affixed to the front of the tank to retain the suction pipe and hose in position when travelling, and a leather gaiter is fitted for protection where the pipe is liable to strike the top of a gully. On the near side, just ahead of the rear wheels, is a wooden box; into which sticks and other objects found in gullies, and which are too large to be passed through the suction pipe, t an be deposited.

Below the chassis is a rubber squeegee in five sections, which can be lowered on to the roadway when washing is carried out. An interesting variation is that curved steel plates may be substituted for the rubber, for the purpose of removing snow, these being capable of adjustment from the cab.

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Locations: Newcastle

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