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Loading Arrangements for Refuse Collectors

17th February 1939
Page 56
Page 56, 17th February 1939 — Loading Arrangements for Refuse Collectors
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Which of the following most accurately describes the problem?

FROM Scammell Lorries, Ltd., Tolpits Lane, Watford, and others, comes patent No. 498,144, describing improved loading arrangements for refuse-collecting vehicles. The design incorporates a rear-wall portion of adjustable height, with a roller shutter capable of reaching the rear wall in all its positions.

The drawing shows a rear view of the body; the lower portion (2) is made of corrugated metal attached to a rigid framework, the height of which is adjustable by sliding the frame on a pair of vertical guide-bars (3). When the vehicle is empty, the wall is set at its lowest; as the refuse accumulates, the wall can be raised to prevent escape of the contents. A roller shutter (1), which also forms the roof of the vehicle, can be lowered to reach the rear wall, whatever its height.

Improvements in " Dumper Vehicles.

FOR use on building sites, and in excavating work, the " dumper " type of vehicle is becoming increasingly popular, and an improved design of such a machine is shown in patent No 498,410, by E. Boyden and Co., Ltd., Elsinore Road, Old :Trafford, Man

chester. Such types of vehicle are usually a conversion from a standard tractor, the Fordson being particularly suitable: the patent refers to a machine of this make.

To the standard tractor is attached a pair of channel irons (4), "with Suitable cross-members, fixed to brackets (6) on the rea.r‘axle casing. The chahnels extend to the front of the vehicle, to' form a halite for carrying the tipping bucket (1). This member can roll on curved girders (3) to' discharge its load, and is prevented from moving bodily by links (2). In view of the increased load, the rear-axle casing i9 strengthened by a pair of screwed tierods (5). The advantage .of the design is that it _interferes but little with the accessibility of the tractor.

Fuel Injection in a Series of Spurts.

FROM Humboldt Dentzrnotoren A.G., of Cologne, Germany, comes patent No. 497,985, describing an e96

loaded accumulator piston (1), the working space (3) being formed between the two. At the bottom of the stroke the working space connects with the supply port (7), via a central bore in the piston (1). As the plunger rises, three ports (5) connect, in turn with the discharge port (8), arid inject in three distinct spurts for full injection; for partial injection the helical control edges allow an earlier release into the overflow port (2).

• Piston-ring PrOViding Adjustable " Wall-pressure. '

AN improved piston ring, of the spring-expanded type, forms the subject of patent No. 498,070, by W. Oubridge; " Broadwa-ter," Styvechale Common, Coventry. The object is to

provide a ring, the wall-pressure of which is adjustable, and, at the same time, is readily a,ssembled in the piston grooves. The drawing shows a section of the cylinder (1) and piston with the composite ring in place. It comprises the normal sealing ring (2), the wavy spring-steel expander (4), and a packing shim (3), formed as a continuation of the steel expander. The pressure of the expander can thus be lessened by the simple operation of snipping off a portion of the packing shim before assembly.

High-pressure Pump for Hydraulic Tipping Gear.

THE usual type of gear-pump, whilst giving a smooth non-pulsating output, is difficult to construct if high pressures be required. A modification to this type of pump, intended for hydraulic tipping vehicles, and said to be capable of giving pressures up to 2,000 lb. per sq. in., is shown in patent No. 498,221, by M. Edwards, Pilot Works: Manchester Road, Bolton. , There is no departure from standard principles, but the proposed construction is such that accurate manufacture is simplified. The body (3) is a plane-surfaced block, which can be ground all over, including the intersecting bores. A pair of cheek-plates (2), also ground, are provided with close-fitting bores where the gear spindles project. Outer blocks (1), with surface-ground faces, house largediameter ball races, and complete the assembly, which is fluieltight at all points, except where the drive-shaft protrudes, at which point .a special higli-pressure gland is provided.


People: M. Edwards
Locations: Cologne, Coventry

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