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A BODY FOR LOOSE MATERIAL.

26th June 1928, Page 76
26th June 1928
Page 76
Page 76, 26th June 1928 — A BODY FOR LOOSE MATERIAL.
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Which of the following most accurately describes the problem?

A Rdsumd of Recently Published Patent Specifications.

TIIE body described in the specification, No. 274,778, of Jacob Knappich, of Augsburg, Bavaria, is intended for use with loese iraterials such as house refuse. The body is cylindrical in form and can be rotated by means of a pinion engaging in the cogs shown at the front end, the whole weight being borne by rollers, Inside the cylindrical body is an internal flange which forms a two-start screw. A bin for house refuse is shown, in dotted. lines, being discharged; the screw flange being intended to convey towards the front of the body all matter that is thrown in, as rotation at a slow rate is continued whilst refuse is being collected. There is no tipping gear, as discharging is accomplished by reversing the direction of rotation. We recently illustrated another German design which was much on the same lines.

A New Material for Bearings.

IN specification No. 275,648, the Societe Anonyme Fran eaise du Ferodo, of Paris, describe the use of a non-metallic material for bearings; big and small ends of connecting rods are mentioned. The specification refers to " dry " working, yet in another part it mentions lubrication of such bearings.

The material suggested is mainly synthetic resin mixed with fibres in the proportions given in the two examples. The main feature of the invention is the employment of synthetic resin without the mixture of graphite or any metallic substance. Example 1 :—Resin, 50 parts by weight ; fibres, 50 parts by weight. Example 2 :—Resin, 60 parts by weight ; fibres, 40 parts by weight.

An Arrangement of Springs for a Six-wheeler.

AN arrangement of springs for a six-wheeled vehicle, driving only on one axle, is shown in the specification, No. 290,944, of Francois Adritenssens, of Antwerp. The rearmost axle does not drive. It is claimed that with this arrangement the vehicle can turn a corner with less grinding of the tyre than with the ordinary arrangement. The upper left-hand view shows the spring, which has a shackle at

tached to both of its ends. By this means a certain amount of side movement is possible when cornering. The spring is-attached in its centre to a cross-beam, which has its ends journalled and borne by a sub-frame as shown in the lower view. Links or radius rods with universal joints at both ends separate the rearmost axle from the driving axle.

The arrangement does not in any way equalize the load between the two axles, as in most six-wheelers, the yield of the springs being relied upon to keep both pairs of rear wheels in contact with uneven ground. . We should-ireagine that some compensating _lever would ensure ,better contact, With uneven ground than the arrangement shown.

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A New.Locknut.

THE locknut which forms the subject of the patent of

Arthur John Wigglesworth, No. 280,2:73, appears to us to be one of the most practical ideas we have seen in the way of locknuts, for, in spite of the number of inventions in this direction which are patented every year,. we still see the split pin and slotted nut 'wilding its own. The present invention resembles a nut which was common many years ngo, but in that case the nut, after having been tapped, was slightly compressed at the split, thereby making it "spanner tight" on its bolt. In the present case, however, the nut 280,)74 is not compressed, but relies upon the compression which takes place when

the nut bears against the face of the work it has to hold. It will be seen that the face (A) is not at right-angles with the axis of the bore, the space (0) representing the difference between the face and a line at right angles to the bore. The width of the slit being equal to the distance shown at C, it will be seen that the slit (B) will be entirely closed when the nut is fully tightened up, so that the lewer part of the nut will receive the support of the part (D), and the nut should then be equal to a solid nut. The cost of manufacture should be very little above that of an -ordinary nut, as the slanting face could be milled while the slit was being cut, as it would not be possible to part the nut from the bar in a slanting direction while in the lathe.

A New Ricardo Combustion Chamber.

IN specification No. 280,544, Ricardo and Co. and the Societe Industrielle et Commerciale de Gennevilliers, of France, point out that there are three kinds of turbulence, which they describe as "general," "organized," and "eddying." It is of that kind which is referred to as " general " with which the present invention 'deals, as that kind is considered by them to be of the greatest value in engines of the class used in automobiles.

In the present case, the piston is allowed to approach the top of the cylinder as nearly as possible, the inlet valve being closed at the time of the piston being at its highest position. The neck of the passage between the cylinder and the combustion chamber is intentionally contracted to produce the desired turbulence. No very definite reasons are given for the smallness of the distance between the piston and the head of the cylinder, and it would be interesting to learn more about this.

A Simple Oil Cup.

IN spite of the more elaborate systems of lubrication, there

are certain parts of a commercial motor vehicle which require individual lubrication in the form of oil. The simple oil cup shown in the specification. No. 290,947, of Nya Aktienbolaget Galco, of Stockholm, is of the type in which no thread is employed to hold the cup in place, the stem being merely driven into a plain hole. The metal of which the stem is composed being thin, it can contract when the cup is driven home. Cups so held are found to be less likely to work loose than tthose with the usual screwed stem. The cap and the body are both formed by stamping from sheet steel, aspring being arranged to close the cap after sufficient ail has been introduced.


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