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Abridgments of Interesting Patent Specifications.

23rd November 1905
Page 40
Page 40, 23rd November 1905 — Abridgments of Interesting Patent Specifications.
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Which of the following most accurately describes the problem?

.No. 27,996, dated December 21st, 1904. —Wheels.—T. Coulthard and T. Coulthard and Co.—Twin tyre wheels for non skidding purposes. The twin tyres are carried on a common rim, to which they are secured by bolts, and the space be tween the tyres is filled with a non-slipping material (g). Shoes (i) are arranged transversely of the tyres.

No. 4.,r5r, dated February 28th, 5905.Axles.—P, Noble.—The axle comprises a skeleton bridge adapted to encircle the differential gear. Tubes projecting from the bridge form the stationary parts of the axle ; and detachable side plates en

case the differential gear. In the drawings Fig. s is a longitudinal section, and Fig. 2 is a cross section of a differential and driving gear casing for the live axle of a motor vehicle, The casing comprises a skeleton bridge (A), which may be a casting, and is adapted to encircle the lifferential gear. At diametrically oppo

site points the ring (A) is formed with tubular lugs (B), into which are inserted the ends of the stationary axle, to which they are secured. The front and back of the ring (A) are encased by plates (C) attached to the ring. The ring (A) is provided with a part (1)) to receive the driving worm pinion. Bearings for this wheel arc provided in the parts (F' 1:1). The differential gear is located in the open space (Al) in the ring, and is connected to the driving parts of the axle, which pass freely through the hollow stationary axle and tubular lugs (B), by squares on these driving shafts, or by jaw clutches, or otherwise. To dismount the gear, the driving shafts are withdrawn and the cover plate (C) removed, when the differential gear can be easily taken out.

No. 25,349, dated November 22nd, 1904—Explosion engines.—A. Beck.—The object of this invention is to provide reliable means for the automatic, or self-ignition of working charge. This is accomplished by the compression of a combustible gas or mixture to a sufficient extent to produce automatic ignition. The compression takes place in a supplementary cylin. der or chamber (b), in which there moves a piston (c), and the cylinder (b) communicates with the main cylinder (a) by ports (di and (e). The lines (g) and (h) indicate the limits of stroke of the piston in cylinder (a), and the smaller cylinder

(b) receives its charge from cylinder (4 during the suction stroke). The piston (c) is operated preferably from the crankshaft and compresses the charge in b to

a greater extent than the pressure existing in a, and causes it to automatically ignite. The increase of pressure due to ignition forces the spring controlled valve (f) open and allows the ignited charge in b to Bash into a and ignite the working, charge. The force with which the charge in enters a causes a detonation rather than a combustion.

No. 28, 572, dated December 23rd, 1904—Valve Gear. -Fielding.—A tubular inlet valve seats upon the upper surface of the exhaust valve so as to reduce the power required to operate the valves to protect them from the hot gases and to simplify their operation. In the drawing (A) is a passage leading to the cylinder (B). (C) is the exhaust outlet, and D the inlet. E is the exhaust valve resting upon the mitre seat and having a tubular spindle(E1). A spring (F), acting upon the collar (G), connected to the valve spindle, holds the valve down upon its scat. The valve is operated by the lever (El). I is the inlet valve, seating upon the upper surface of the valve (E). The valve is held down by spring W. The valve (I) is of tubular form, an upward extension of the valve being fitted with piston rings to maintain a sliding pressure-tight joint within the cover (K). The valve (I) is prevented from overheating by the passage of a cool charge through it and the upper surface of the exhaust valve (E), being protected from the action of the high temperature gases by being covered by the air inlet valve (I), is prevented from excessive heating. Thevalve (I) is operated by rod (1.) passing through the hollow spindle of the exhaust valve (E). This rod is actuated by the lever (11). The spaces (N) represent rfle water jacket.

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