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A Rotary-distributor Injection Pump

25th November 1955
Page 66
Page 66, 25th November 1955 — A Rotary-distributor Injection Pump
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Which of the following most accurately describes the problem?

iNTENDED for multi-c■ lindered " engines, a rotary-distributor injection pump is shown in patent No. 737,403, by C.A.V. Ltd., Warple Way,. London,

W.3. Simplicity--and robustness are claimed for the design.

The multiple cam (I) has as many lobes as there are cylinders to the engine, and the plunger is rotated by bevel gears (not shown) so as to serve in turn each one of the several outlets (2). • ' , The lower part of the plunger is larger than the upper portion and both diameters fit their respective bores. The annular space formed between the two diameters constitutes the working space, and on the pressure stroke fuel passes therefrom through a cross-bore (3) and thence to bore 4. This connects with a distributor slot (5) which lines up in turn with the exits.

Regulation is performed by a sliding collar (6) the height of which governs the moment at which the spill ports (7) are uncovered. A non-return valve (8) may be incorporated; this, however, Forms the subject of an .additional Patent numbered 737,404.

A POWER TAKE-OFF

PATENT No. , 737,382, shows ,an attachment for driving heavy auxiliaries such as fire-pumps, welding

bener2ttors, air-compressors and the like, Irum the engine of .a vehicle. It is described as applied to a Bedford vehicle but the scheme is not limited to this make. The patentee is Prestage Ltd., Suffolk Street, Birmingham, I.

The attachment is located between the clutch and the gearbox and calls for a.slightly longer clutch-shaft to be fitted. Referring to the drawing, this it32

shaft is shown at I. It carries a helical gear which drives,, via an idler, the output shaft (2). This is made in two concentric parts which can be coupled by a dog-clutch (3) when a drive is required. The dogclutch is operated by an external lever.

The unit takes up little room and brings the take-off shaft well clear of the side of the gearbox. It can be

used equally well with the vehicle stationary or moving; the latter --condition may -be useful in fighting heath fires.

ANTI-SKID ATTACHMENT FOR TYRES

FOR many years chains have been used for wrapping around tyres to prevent skidding on ice and snow, and now there appears, in patent No. 737,254, a more scientific approach to

the problem. The patentee is John Bull Rubber Co., Ltd., Evington Valley Mills, Leicester.

The drawing shows one of the proposed units, many of which would be required to surround a wheel. A tough rubber tread member (1) is made in two parts, interconnected by tie-bars

(2). The underside of the tread is covered with numerous rubber "pimples" so as to engage in the pattern of the tyre tread.

Moulded integrally is.a strap (3): this is placed between the spokes of the wheel and is clamped tightly in place by a buckle (4).

The tread, as shown, would provide quite a good -grip on snow and ice, but the patent covers also the moulding-in of metal grips for these conditions.

VEHICLE FOR TRANSPORTING POWDER MATERIALS

THERE• are many Powdery sub-. I, stances, malt and flour for example, which are unsuitable for discharge by a tipping body, and patent No. 737,174 shows a body more suited to the purpose. Its aim is to enable discharge to be done at a controlled rate, The patent .comes from The Duramin Engineering Co., Ltd., Standard Road, Park Royal Road, London, N.W.1.

• A longitudinal section of the body is

shown in the drawing. It consists of a

tank-like . structure having filling openings (1) at the top. The lower portion slopes towards the centre from At the bottom, the floor is formed into a series of prismatic steps as shown at 3; this restricts the escape path to a number of narrow slots (4) • each provided with a butterfly valve..

The channel-sectioned trough is actually made in two parts, one above the other, and these can be vibrated by any convenient power means, preferably hydraulic plungers. The troughs are mounted upon rubber-bushed links to permit the necessary oscillation. A chute (5) at the rear forms the ultimate exit.

SIMPLICITY IN VEHICLE LOADERS L'OR handling filled sacks, milk churns and ,other units, is the purpose of a vehicle attachment shown in patent No. 737,248 (F. Playford, Oxburgh Hall, King's Lynn). The chief feature of the scheme is its ingenious simplicity. The drawing sluivvs the unit attached to the rear of a vehicle. It consists merely of two pulleys mounted on the ends of a swivelling cross-bar. The cable carries a grab at one end and a chain-ladder at the other.

The weight of the operator is the lifting force; all he has to do to raise the load is to start to climb the ladder. Once raised, the load can be swung off he vehicle and the operator then " descends " the !adder in order to lower it.

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Locations: Birmingham, London, Leicester

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