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Uniform Weight Distribution on Multi-tyred Wheels

28th July 1939, Page 52
28th July 1939
Page 52
Page 52, 28th July 1939 — Uniform Weight Distribution on Multi-tyred Wheels
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Which of the following most accurately describes the problem?

ROAD camber tends to load twin tyres unevenly, and to prevent this is the object of a wheel design shown in patent No. 507,313, by Dunlop Rubber Co., Ltd., 32, Osnaburgh Street, London, N.W.1.

The drawing shows a triple-tyred wheel, but the scheme is equally applicable to those employing a pair of tyres. In the present case, the central wheel is attached to the hub via 12 rubber-bushed spherical housings (1). The housings contain the bosses of ball-ended levers (2) which extend to the other rims; here they terminate in similar rubber-bushed housings. The wheels are free to rise or fall, the load and torque remaining equally shared.

A Simplified Type of Tipping Gear.

pATENT No. 507,079 refers to the type of vehicle used on building sites and in quarries, and shows a means for facilitating the loading and unloading of such a machine. The patentee is G. Dempster, care of Dempster Bros., Inc., Knoxville, Tennessee, U.S.A. The rear of the vehicle is provided with a pair of upstanding girders (I) braced to the frame by two bars (2). The load container (4) can slide up and down the girders, being moved by Cables worked from an hydraulic cylinder (3). When raised, the bucket is automatically locked in position by a catch (5).

Injector Giving Two Forms of Jet.

I N patent No. 506,609 Henschel and Sohn G.m.b.H., Kassel, Germany, states that, whilst the pintle type of injector is excellent, from the selfcleaning point of view, its spray is more mist-like than that from a circular orifice.

The drawing shows how both forms of injection can be produced by a single nozzle. The pintie (2) is provided with a circle of fine grooves (3); these create the highly atomized fuel mist. The long-reach jet is ejected from the central orifice (4) which receives its fuel supply from a crossbore (1) in the conical seating. Steering Rods From Sheet Metal.

ADESIGN of steering rod, suitable for specialized production, is shown in patent No. 507,508, by Thompson Products Inc., Cleveland, Ohio, U.S.A. This concern states that the usual type of rod has to be built up from tube having larger end pieces for the reception of the ball joints; the new scheme, however, achieves the same end with a one-piece construction.

Sheet metal is used, the stamping being as shown in the drawing. Holes (2) for the insertion of the ball joints are made in the stamping, and the

piece is then rolled around a mandrel until the opposite dovetails interlock. An extra-thick strip is spot welded on at point 1, to act as an abutment for the ball joint. The sole remaining operation is to screw the bore for the adjustment plug. A Piston with Built-up Ring Grooves.

APISTON in which the rings are paced apart by loose collars, held together by an upper screwed ring, is shown in patent No. 506,190, by C. Fielding, 33, Bron Awelon, Barry, Glamorgan.

The screwed ring (1) and the collars (2) are made of steel, whilst the piston body is of aluminium alloy, so that, when heated, the collars (2) are rigidly held in a solid gas-tight assembly. The object of the patent is to enable side wear of the rings to be taken up so that correct ring clearances can be maintained.

A Stone Guard for Twin Tyres.

A STONE IA wedged between twin tyres can cause considerable damage to the walls, and patent No. 507,370 shows a protective device to prevent their entry. The patentee is Henley's Tyre and Rubber Co., Ltd.. 20-22, Christopher Street, London, E.C.2. The proposal is to insert a Usection rubber ring, shaped to conform to the curve of the walls, between the two pneumatic tyres. An important feature is that the ring is sufficiently flexible to allow for tyre deflection.

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