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Patents Completed.

24th December 1914
Page 18
Page 18, 24th December 1914 — Patents Completed.
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Wolseley Springing. Berwick Steering Gear. An Improved Sparking Plug. Rolls-Royce Piston Construction.

THE WOLSRI,EY TOOL AND MOTOR CAR CO., LTD., AND A. A. REMINGTON, No 26,678, dated 20th November, 1913.—In cantilever springs the axle is generally secured only on the longest plate of the spring, at its free end, and this is the

weakest part of the whole spring ; fracture of this leaf generally leaves the axle quite free, which may cause an accident. According to this invention the axle is secured to some of the other leaves of the spring in such a way that the ordinary operation of the cantilever is unaffected, but should the longest leaf break, the axle is not entirely released. In one construction, an extra plate is secured by straps beneath the cantilever at its free end to some of the shorter leaves, and the bracket of the axle is secured both to this plate and to the longest leaf in the usual way.

In another construction, the two lower leaves are made of the same length, each is formed with an eye at its outer end, and both leaves are separately attached to pins on the axle bracket.

F. IL ROYCE, T. B. BARRINGTON AND ROLLS-ROYCE, LTD., No. 15,751, dated 1st July, 1914,—The obiect of this invention is to prevent the passage of lubricating oil along the cylinder walls into the combustion chamber past the piston. A special oil-scraping ring is fitted on the piston near its lower end, and beneath the ring there is provided a small annular channel to collect the oil scraped downwards by this ring. The oil is delivered from this channel through a number of small holes to the interior of the piston. Between the oil-scraping ring and the gas-rings, a groove is provided around the piston, and this space is opened to the crank chamber by a number of holes in the piston-wall so as to equalize the pressure on each side of the oil-scraping ring.

In an alternative construction, which is described, the oil. scraping ring may be fitted at the lower end of the piston, that part of the piston-wall below the ring being cut away so that the oil Is thrown back directly into the crank-chamber.

F. W. BEI:twit:a AND CO., LTD (N. AND G. SIZAIRE), No. 7909, dated 28th March, 1914.—According to, this invention the worm on the steering pillar is made with a large thread of suitable pitch, and two working surfaces are provided on the thread. One of these is near the root of the thread on the upper surface, and the other is near the outer edge of the thread on the under side. This thread engages a pair of conical rollers which are mounted in hall bearings on the end of a lever coupled to the steering wheels in the usual manner. One roller bears against each of the working faces on the thread, so that there is no possibility of any wear or backlash. The coned rollers are arranged to be pressed forward by spring into the thread, so that they always grip the opposite sides of two adjacent turns of the thread. Two rollers are used, because when the worm is turned they are engaged at opposite sides and turned in opposite directions; if only one roller were used excessive wear would result.

E. A. H. DE POORTER, No. 25,531, dated 7th November, 1913.—This specification describes a sparking plug in which the central electrode is all in one piece and has a collar formed or secured on it slightly below the middle of its length. The main body of the insulator is built up of mica washers, which are gripped between this collar and a nut at the top of the electrode, with suitable washers interposed.

The lower part of the insulator is made of porcelain provided with conical shoulders on its lower side by which it bears, through a washer, on a similar shoulder on the metal body of the plug.

The lower end of the porcelain insulator is cored out to a somewhat larger size than the central electrode itself to leave an annular space around it, and the insulator is made somewhat smaller than the body of the plug to leave a second annular space.

The various joints are made gas-tight by the use of suitable asbestos washers.


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