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A New Lewin Road Sweeper

24th October 1947
Page 56
Page 56, 24th October 1947 — A New Lewin Road Sweeper
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A R6urne of Recently Published Patent Specifications PATENT No. 589,947, by H. Walker and Lewin Road Sweepers, Ltd., Victoria Works, Hill Top, West Bromwich, describes the latest advances in the design of road-sweeping machines. The chief aim is to give the driver the best possible view of the brushes without making the vehicle unduly long.

The machine is a three-wheeler, having two wheels at the front and a single steerable wheel (1) at the rear. The sweeping gear comprises a main brush (2), which can be raised or lowered in the usual manner, and a Secondary vertical brush (3), which can also be lifted.

Brush 3 is for cleaning out gutters and thrusting the material into the path of the main brush., and as its position has to be

adjusted to a nicety, it is placed well within the driver's range of vision. The main brush is surrounded by a guard (4) which contains a conveyor for transferring the picked-up matter into the interior of the body. To reduce dust-raising, the front of the machine is fitted with a water spray (5).

U.S. IDEAS ON REFUSE COLLECTORS THE latest American practice in the J. design of refuse-collecting bodies is disclosed in patent No. 589,775, by Anthony Company, Streator, Illinois, U.S.A. The body is fitted with a travelling partition wh:ch packs the refuse during the loading, and discharges it at the end of the journey.'

The partition is hydraulically operated and is located at the top of the body. In the drawing, 1 is the partition and 2 the hydraulic cylinder which works it. The stroke of the cylinder is short, but the motion is magnified by an arrangement of pulleys and cables.

The vehicle is loaded through .sliding doors (3) at the side of the body. The engine-driven oil pump (4), which supplies power to th'e hydraulic mechanism, is fitted with a valve just above it, which is worked by a rod (5) operated by the rear hanging door (6). The object of this arrangement L ta reduce the hydraulic thrust while the door is closed A42 and allow only sufficient force to pack the refuse against the door. When the door is opened, full power becomes available for unloading.

NEW TYPE OF FUEL INJECTOR

ANEWprinciple in the NEW' of fuel injectors is disclosed in patent No. 589,735, by S. A. Andre Citron, Paris,

In the drawing, 1 is the needle valve, which is urged upwards and away from its seating, by a surrounding spring. To form a seal, however, an excess counterforce is applied by another spring (not shown) which acts downwardly upon a stem (2). Between the stem and the needle valve is a flexible metal diaphragm (3) which permits the valve to lift when fuel under pressure is supplied through the inlet (4).

To prevent shearing of the diaphragm, the cover plate (5) is shaped to suit the valve head, so t h a ;, excessive movement can only Sandwich the diaphragm between two rigid surfaces. The force of the external spring is adjustable and is used to defiae the actual pressure of injection.

A 24-CYL1NDERED SWASH-PLATE OIL ENGINE..

A A SWASH.PLATE two-stroke 24ft cyiindered oil engine intended for road vehicles is protected by patent No. 589,719 by P. Dempster, 2, Kitson Road, London, S.W.13 The drawing shows a half-section across one bank of 12 cylinders. Two banks (I) are used, arranged in ringformation around the central shaft, and staggered so that the centre line of any one cylinder falls midway between two on the other side. The shaft carries a swash-plate (2), which engages with ball ends on the piston rods (3). Springs (4) are used to keep the pistons in contact with the swash-plate.

The combustion arrangements are normal, air being admitted and exhaust discharged through a pair of belts (5) surrounding the cylinders. Each cylinder is fitted with an injector (6), and each piston has a nosepiece which enters the injector bore and provides a "

squish" effect. Water-cooling is employed.

TRACTOR WInt LOAD EQUALIZINGSUSPENSION PATENT No. 589,614 comes from E. Graham, Stockholm, Sweden, and shows an improved form of four-wheeldrive tractor incorporating a device to ensure that all wheels share the load equally on uneven ground.

The engine (1) drives through a bevel gear, a cross-shaft (2) fitted with a pair of brake-cum-clutches for steering purposes. The drive is passed by chains to a second cross-shaft (3), thence by further chains to the axle shifts (4). From the axle shafts the wheels are driven by another set of chains (5).

The whIels are mounted on rocking beams pivoted in sleeves (6) on both sides of the frame. The essence of the patent is the method of interconnecting the two beams so that the load is equally shared by all the wheels. Several schemes are described; in the present instance, each beam pivot is fitted with a. bevel gear (7), the pair being connected by a pinion (8), so that . if one wheel be raised, the opposite one is forced down until a balance is reached.


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