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A Universal Joint which Drives by Friction

19th April 1932, Page 72
19th April 1932
Page 72
Page 72, 19th April 1932 — A Universal Joint which Drives by Friction
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A TU.surn of Recently Published Patent Specifications

A SOMEWHAT revolutionary inven.ti. don is described in patent No. 368,876, by the Budd Wheel Co., 2,500, Hunting Park Avenue, Philadelphia, The invention consists of forming an inner and outer member and introducing between them a rubber ring under such great pressure that one member can drive the other by friction. In the upper left-hand view a very light and simple form of inner member Is shown which might be formed integral with its tubular shaft. The broken lines (R) indicate the shape of the rubber ring before it is compressed

into the small space between the two members. The lower view shows another construction in which 2 and 4 are the friction surfaces, and 3 is the rubber, whilst the cone (N) is employed in introducing the rubber.

Two of the figures show the method of introducing the rubber (R) by means of the cone (N). The following is an extract from the specification :— "We have discovered that with a C50 mass tension in body 3, readily attainable by coinpressibly forcing it between members 2 and 4, there is obtained a frictional bonding in a joint of about the size illustrated able to transmit, without disruption of the bond, from 50 per cent. to 100 per cent. more maximum driving torque than required in the medium-powered automobile of today."

Starting Compression-ignition Engines.

APPEARING in patent No. 368,762, which also refers to means whereby engines of the compression-ignition class can be started with less difficulty than usual, are the names of Leyland Motors, Ltd., and P. E. Biggar. The difficulty is to obtain a sufficiently high temperature for ignition at the low speed of cranking.

The means employed, according to the present invention, is to niount the camshaft so that sliding movement is rendered possible by using the handle (B) and a fork connected with it ; this fork, acting on the helical gears, alters the angular setting to advance the closing of the inlet valve towards the beginning of the compression stroke. In all but one or two cylinders a collar (C) is provided so that it opens the inlet valve to relieve compression.

When sufficient momentum is stored in the flywheel the handle can be moved to its normal position, the tappet comes down on its cam, and the setting is restored to its usual position.

THE name of Daimler-Benz Aktien

gesellschaft appears in patent No. 369,155, which relates to the easy starting of engines of the direct-injection type. In this arrangement a pre

liminary combustion chamber is so constructed that its outlet is opposite the centre of gravity of the body of air contained in the main combustion chamber of the engine, the ,piston having a depression in its head.

An ignition device (7) is provided, and the small view is a section on the line A.B.

Oil-scavenging Piston Rings.

pATENT No. 368,885, by H. N. Bates and Specialloid, Ltd., relates to a form of piston ring which collects

oil from the walls of the cylinder and delivers it through holes to the interior of the piston. The specially formed rings are placed in separate grooves.

The detail view shows the scraper edge, which when new is of a blunt form, gradually wearing to a sharp edge, the object being to allow a new engine to be supplied with an abundance of oil.

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Locations: Philadelphia

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