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An Injection Pump of the Face-cam Type

22nd November 1940
Page 34
Page 34, 22nd November 1940 — An Injection Pump of the Face-cam Type
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A Resumi of Patent Specifications that Have Recently Been Published 1-3. A TREND in German injection

pump design is disclosed in patent No. 527,182, which shows a pump in which the several plungers are actuated by a face-cam. The patentee, the Deckel concern of Munich, states that the advantage lies mainly in the low cost of manufacture as compared with the camshaft type.

The drawing shows the pump portion in outline only,, the patent being concerned solely with the cam and its bearings. The former (4) has a conical working rim which engages conical rollers (1) on the plungers, these being spaced out in circular formation. The cam is rigidly backed by a ball-thrust bearing (3) immediately behind the points of load, whilst a central ball race (2) maintains the axial position.

ELECTRIC VAN LAYOUT FOR BIG BATTERY SPACE / .the design of battery-electric

vehicles, the problemof battery stowage is ever present, arid patent No. 527,052 shows the latest suggestions in this respect. The patent comes from Associated Electric Vehicle Manufacturers, Ltd., 231-3, Grand Buildings, Trafalgar Square, London, W.C.2, and C. Jones, Birmingham. The aim of the design is to increase the

battery space without adding to the cost of the chassis.

The frame members are of channelsection with the single web vertical, and are .set inwardly at the middle to form a narrow parallel' portion (2). Across this part is a pair of lighter channels (1) reinforced by gussets (6) to prevent distortion caused by accelerating and braking.

The battery boxes. (4), one on each side, are made of wood reinforced by a skeleton framework of steel. Angle pieces (5), along the sides, form brackets which slide upon the channels (1) when the box is inserted or removed. Two overlapping lugs (3) fixed to the angle pieces serve as guides and locate the box in a lore-and-aft direction.

Another patent, No.527,051, shows a special truck for handling the batteries of the above vehicle.

A32 A LEAK-PROOF HYDRAULIC BRAKE CYLINDER

effect an improved seal of the liquid is one of the objects of a design of hydraulic brake cylinder shown in patent No. 527,092 by General Motors Corporation, Detroit, Mich., U.S.A. Reduced cost of manufacture is another feature claimed. The cylinder is formed of two concentric parts screwed together against a shoulder (1). A pair of pistons (3)

is employed, each of which is fitted with an adjusting screw (2), which engages the shoe in a slot in the head. Between the convex piston heads are two flexible diaphragms (5). These are firmly pressed on to their peripheral dovetail seatings by a pair of metal cups (4) through holes in which the liquid is admitted. When under pressure, the diaphragms • depart from the metal cups and force the pistons outwards, but the outer edges still remain firmly clamped in their seating, and thus an efficient seal is maintained.

ROTARY ENGINE WITH IMPROVED SEALING ARRANGEMENTS ("NNE or two patents have appeared

lately on the subject of an unorthodox engine in which the cylinders, arranged in star formation, _rotate inside a stationary combustion head ring. The latest patent on the subject is No. 525,f+83 from Mawen Motor Corporation, 500, Fifth Avenue, New York, U.S.A.

The drawing shows the general layout of the engine, in which the outer rirrg (4) is stationary, whilst the cylinders revolve in 011C direction and the central crankshaft in the other. This gives a geareddown output shaft, an advantage in the caie of aircraft.

The five cylinder heads are connected to an inner liner (3), which fits closely the outer ring and forms a seal. As might be expected, sealing is one of the major problems, and the patent describes the means adopted in some detail. Each cylinder is fitted with .a sleeve (5), which is urged into contact with the outer ring by spring loading. Lubrication between sleeve and outer ring is by the Michell principle.

A tensioner (6) is used to adjust -the running fit of the liner within the outer ring. In operation, each cylinder receives, as it passes, a compressed charge from inlet ports (1) , whilst after the power stroke, the exhaust gas is discharged out of ports (2). Either spark or compression ignition may be used.

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