SERVO CLUTCH OPERATION
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PATENT No. 875,514 comes from Clayton Dewandre Co., Ltd., Titanic Works, Lincoln, and deals with the power operation of clutches. The aim of the design is to provide a very rapid release, but. to permit engagement at a controlled rate.
HYDRAULIC BRAKE FAILURE DATENT No. 877,401 deals with a safety device for use with hydraulic or air brakes. It consists of a unit that will isolate any line that loses its pressure. The patent comes from H. Stevenson, 45 Queen Street, Brisbane, Australia.
BRONZE BIG-ENDS
A BIG-END bearing made entirely of Z—V high-strength bronze forms the subject of patent No. 875,417. The aim is to provide a safety surface in case the softer lining should break down and to overcome production difficulties in Vee engine connecting rods. (Daimler-Benz A.G., Stuttgart-Untertiirkheim, Germany.)
As shown in the drawing, the steel connecting-rod (1) has bolted to it the halves of the bronze big-end. The mating faces are serrated (as shown at 2) and dowelled to ensure precise alignment in assembly. A lead or tin-based wearing surface is applied to the bore (3) and the running surface for an auxiliary connecting rod (4) by electro-deposition, the thickness of which is only a few thousandths of an inch.
Note the set-in of the bolts at the top; the reason for this is to reduce the overall width so that the rod can be taken out through the cylinder bore when dismantling.
SLOW-MOVING VEHICLE
PATENT No. 869,470 comes from A Rover Co., Ltd., Meteor Works, Solihull, and shows a vehicle provided with an extra-low gear driven by an auxiliary engine. Its purpose is snow clearance, crop spraying, road sweeping and similar duties requiring only a crawling pace.
MOBILE PNEUMATIC POWER PLANT
I-1 A VEHICLE designed expressly for
supplying compressed air to a working site is shown in patent No. 875,365. The novel feature is that the engine is designed to drive the compressor and the propulsion of the vehicle is only a secondary duty. (R. Clarke, 21 Raymond Road, London, S.W.19.) The drawing shows the general laycut. The engine (1) is of a type suitable for driving the compressor (2) through a dog clutch housed in the box (3).
At the other end of the engine is a conventional clutch and gearbox (4) for driving the vehicle via a propeller shaft (5). To limit the torque applied to the transmission, an intermediate gearbox (6) is used; this gives an overdrive effect. An accelerator pedal controls the engine when travelling, but when the compressor is driven a suitable governor takes c har ge. Interlocking devices are also described in the patent. LOW-FRICTION BALL JOINTS
THE latest in ball-joint design is dis closed in patent No. 875,003 whid deals with joints having low-frictiol working surfaces. The scheme is parti
cularly suitable for use in suspensio systems. '(The Glacier Metal Co., Ltd 368 Ealing Road, Alperton, Middlesex
The drawing shows a typical joint i which a rod projects from both side. It comprises a steel ball (1) and a pal of part-spherical cups (2). These at held in assembly by a channel-scctio ring (3). Rubber rings (4) are unck compression and ensure a close sphericz fit.
The clamping ring is screwed on t outside and carries a ring-nut (5) f attachment to the surrounding part.