Big-capacity Tipping Trailer
Page 40
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for refuse
A Resume of Recently Published Patent Specifications Obtainable from the Patent Oftice,Price is, each
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A LARGE tipping semi-trailer, de signed specially for the carriage of refuse, is shown in patent No. 512,251, by W. Strain and P. Laurie, Ashgrove, Cottage Crescent, Camelon, Falkirk. This vehicle is equipped with two separate bodies, a non-tipping highlevel container above the turntable and a larger tipping body on the dropped part of the two-wheeled semi-trailer chassis.
The drawing clearly illustrates the assembly, and it will be noticed that the forward body, although positioned above the back part of the tractive unit, is, nevertheless, carried by the semi-trailer chassis on upswept frame members. The rear container is intended for refuse that can be discharged by gravity, whilst the front portion can carry large light articles, old mattresses being mentioned as typical.
DEVICE FOR SECURING BIG-END NUTS.
PROBABLY more damage can be caused by a loose big-end bolt than by any other bolt in the engine, and patent No. 512,314 shows a scheme for the positive locking of these cora
ponents. The patentees are Junkers Flugzeug und Alotorenwerke A.G., Dessau, Germany.
One of several similar schemes it shown in the drawing; in this case the nut (1) is provided with a tubular extension (3), whilst the bolt is made with a projecting square portion (5). After assembly and final tightening,a sleeve (2) with a square hole in the centre is placed in the nut, and secured by building up a rim (4) by means of welding, either as a complete ring or a series of spots.
To dismantle, the welded places are filed away, after which the sleeve (2) can be prised out and the nut unscrewed in the usual manner.
FOR EASILY HANDLING HEAVY SPARE WHEELS.
THE size of the spare wheel of a heavy vehicle may be such that its handling is scarcely within human limits, and patent No. 512,278 shows a mechanical aid for the stowage and removal of this unit. The patentee is K. jewitt, 68, The Drive, Bexley, Kent
The drawing shows the apparatus in the normal position and (in dotted lines) the lowered state. The mechan A30 isia comprises brackets attached to some convenient part of the vehicle, and forming the bearings for a quick
threaded screw (1). The wheel is attached to a false hub supported by a pair of links (2) and an arm (4) pivoted at the point (3). The links
(2) are attached to a nut on the screwed rod, which, when rotated by a handle, lowers the wheel into the dotted-line position. It can then be unbolted and bowled to the required hub, the defective wheel being dealt with in the converse manner.
A COMPOUND-EXPANSION TWO-STROKE.
DATENT No. 512,086 shows an application, to a pressure-charged two-stroke, of the well-known steamengine principle of compounding. The
inventor is Dr. Heylandt, Berlin. This engine comprises three units, a compressor cylinder (1), a high-pressure working cylinder (2) and a low-pressure working cylinder (3) The crankpins are set at a mutual angle of 120 degrees in the top-dead-centre order of 1-2-3.
The working cycle is as follows, the appropriate valve operations being taken for granted : The upstroke of piston (1) delivers a supercharge into the combustion chamber of cylinder 2 in which the piston is then rising to complete the compression stroke. Ignition (either spark or compression) then occurs, and the primary power impulse takes place in the middle cylinder. When this declines, the charge is transferred to the low-pressure cylinder (3) where further energy is given up by the expanding gases, which are then exhausted in the normal manner.