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Gearbox for Cross-country Vehicle

7th April 1939, Page 48
7th April 1939
Page 48
Page 48, 7th April 1939 — Gearbox for Cross-country Vehicle
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A GEARBOX giving an optional .1—t two-wheel drive or four-wheel drive, and giving a lower ratio when all four wheels are driven, is disclosed in patent No. 501,498 by S. A. Adolphe Saurer, Arbon, Switzerland. An additional feature is the provision of a power take-off, a convenience for agricultural and other purposes.

In the drawing, 7 shows the input shaft, 6 the front-wheel-drive shaft, and 4 the drive to the rear wheels. The power take-off (3) can be clutched by dogs (2) to the input shaft. The sliding gear (1) provides a two-speed drive to the rear shaft (4), whilst a dog (5) can connect the front wheels, An essential part of the patent is an interlocking control mechanism, which enables a single movement of the lever to perform a complex gear change.

Power-cum-transmission Unit for Rear Drive.

ACOMPLETE rear-mounted driving unit, for use in a large passenger vehicle, is described in patent No. 501,083 by T. Hare, 1257, Marentette Avenue, Windsor, Ontario, Canada.

B22 The object is to eliminate, so far as possible, the transmission of noise and vibration to the passengers.

The drawing shows a plan of the unit, which iS built up on a sub-frame, and attached to the main chassis by only the spring mountings at the front, and a single-point ball joint (1) at the rear. The driving axles are individually jointed, the two bearings being aligned by a heavy cranked dead axle (2). The engine and transmission arrangements are fairly orthodox, although, of course, mounted in the reverse direction.

Continental Oil-engine Combustion System.

AN improved combustion system is shown in patent No. 501,237 by Franz Lang, 41, Laimerstrasse, Munich. In this design the main combustion chamber

(5) is supplemented by an air cell (1) with a restricted neck. The main air-inlet valve (6) is located in the domed roof of the combustion chamber, whilst a second (scavenging) valve (2) is' placed over the cylinder bore. The third valve (3) controls the exhaust ; this is also over the cylinder. ' The injector is housed in the bore (4), which is in line with the axis of the air cell on the opposite side. • A Chain-supported Moving Floor,

AMOVING floor for the easy discharge of loose material is the subject of patent No. 501,068, which comes from H. Kulhanek and G. L. Fisher, 561, Old Kent Road, London, S.R.1. In this design, the flexible floor, made of rubber, is supported upon tubular cross-members secured to the pivot-pins

of a pair of large chains. In the drawing, the chains (7) slide upon guides (5 and 6) at top and bottom. Each pivot-pin (2) carries a tubular crossmember (shown in the drawing as circles in broken line). A front barrier (1) moves with the chath, and takes the stress of shifting the load when discharging. The rubber facing (3) is attached at one end to this harrier. and, at the other, to the chain by means of a spring-loaded hook (4). Operation may be either by hand or by power drive.

Compact Fuel Filter for Injector Pipes. DATENT No. 1 499,713 shows a design of fuel filter intended for use in injector, pipe-lines, the patentee being Robert Bosch , . Stuttgart, Germany. The filter is housed in an extension of the injector (3) and consists of a plug (1) which fits the surrounding bore with a slight clearance. Three equi-spaced grooves (4) are open at only the upper end, where they receive the fuel charge. Three more grooves (2), which are closed at both ends, are interspaced between the former set, and connect, via small holes, with the central bore leading to the injector. The fuel must thus pass through the small clearance between plug and wall, which acts as filter.

Special Ring Protects Piston Crown,

Tprotect the leading edge of the piston from the direct heat of combustion is the object of a design shown in patent No. 500,307, by W. Borrmann and A. Keune, both of Badersleben, Germany. A special top ring, split in the normal manner, is employed, and this is held between the piston face and a hardened insert. Normal rings are used below, and the whole piston is rendered resilient by

suitably located slits The hardened inserted ring is claimed to give durability without the risk of causing seizing.


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