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An Automatic Grease Gun

4th May 1951, Page 74
4th May 1951
Page 74
Page 74, 4th May 1951 — An Automatic Grease Gun
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AUTOMATIC greasing systems are . known, and consist Of a master gun, the output of which is piped to numerous lubrication points on various parts of the vehicle. They are, however, open to the objection that the longest

pipe runs the risk of receiving the least lubricant, whilst the shorter ones get more than their share. To remedy this is the aim of an improved pumping unit shown in patent No. 650,798, by Electro-Hydraulics, Ltd., Liverpool Road, Warrington.

In this scheme the master gun injects a charge of lubricant to each of the pipe-lines in turn, all the others being disconnected. The drawing shows the gun and the distribution mechanism. The plunger (1) is moved to the right to inject a charge, and can be operated either by hand or by timed power impulses. The lubricant is forced past the outlet valve (2) and is led to the centre of a distributor (3). A rotary port (4) on this member lines up with each of the pipe inlets in turn, so that all are given their due share. To turn the distributor in steps, it is provided with ratchet teeth (5) on its edge; these are engaged by a pawl (6) on the plunger, so that each working stroke shifts the distributor round by one tooth.

PACKING DEVICE FOR REFUSE VEHICLE

PNo. 651,156 comes from H. Van Doorne, Deurne, Holland, and deals with refuse-collecting vehicles. It refers to a means for continuously packing the refuse into the body as it is loaded into the rear-end of the vehicle.

The drawing shows the rear end, into which the bins are emptied through the 6.5l.156 — entrance W. A rubber rim (2) prevents noise and battering of the dustbins when dumped on to the back. The refuse falls into a semi-circular conical housing (3) in which is an oscillating pressure plate (4). This sweeps through an angle of approximately 180 degrees, so that as a bin is emptied into it, the contents arc immediately flung right and left into the body space. The oscillating motion of this plate is produced by a hydraulic cylinder fitted with an automatic change-over valve, but this is only one way of driving it; the patent shows several others.

A NOVEL IGNITION SYSTEM

ANEW system of spark ignition is dealt with in patent No. 650,884, the patentee being Smitsvonk N.V., The Hague, Holland.

Instead of a gap in the circuit, as found in the conventional sparkingplug, the plug is provided with a leaky surface connecting the two electrodes. The current, in passing over this surface, creates sufficient spark to ignite the gases. The scheme is said to be particularly suitable for high-compression engines (10 to I ratio) and requires a secondary voltage of only about 3,000 volts as eompared with the 20,000 volts of the normal ignition coil. The system, which was fully described in "The Commercial Motor" for February 23, uses the distributor to control the flow of current.

FIXING A COLLAR ON A SPLINED SHAFT

INa gearbox, one of the minor points of design is how to fix a stop-collar on a splined shaft. A common method is to pin it to the

shaft, but the hole has a weakening effect on the shaft and is to be avoided if possible. .A better scheme forms the subject of patent No. 649,440, which comes from Singer Motors, Ltd., and J. Shorter. Singer Works, Canterbury Street, Coventry.

The splined shaft is provided with a parting-tool groove (1) located where the stop-collar is needed. The collar (2) is 651.099 a Short piece of splined bush, and it is slid, on the shaft in the ordinary way. When it reaches the groove, it is given a turn through a small angle so that the splines move into line.

This provides an adequate end-lock, but the collar must, of course, be restrained from rotating into its free position. To achieve this, a small key (3) is put into one of the splines, and is held by a small eirclip (4), movement to the right being prevented by other parts. THE • SPRING WHEEL AGAIN

r OR many years inventors have been 1. seeking the perfect resilient wheel, and diverse indeed have been the schemes propounded. The latest suggestion is covered in patent No. 651,007, from Societe A,pplicazioni Gamma Anti-Vibranti, Milan, Italy. In this design, rubber forms the resilient medium.

The rim member is provided with a number of inwardly directed flanges (1), whilst the hub unit has outward pointing ones (2). Spaced between the two sets of flanges is a metal ring (3), which is joined to all flanges by means of cylindrical rubber blocks (4) bonded on. The flanges are in pairs, and the metal ring is located at the mid-point between them. When loaded, the rim moves eccentrically with respect to the hub member. thus stressing the rubber cylinders.

A PICK-UP LOADER FOR LORRIES

TO enable a tarry to load itself with sacks, bales or similar packages lying on the ground, is the aim of a machine shown in patent No. 651,099, by L. Coffelt, Portland, Oregon, U.S.A. The loader can be temporarily attached to the side of the vehicle, and if run

alongside a row of filled sacks, will elevate them to platform level.

The drawing shows the machine, which, although carried along by its attendant vehicle, is provided with a small engine (1) to work ,the elevator. Assuming a sack to be lying in the path of the machine, it is first encountered by a flared fence member (2) which guides it on to the lower end of a conveyor (3). To prevent the conveyor from rolling the sack over and over, a gravity-loaded trap-door (4) is fitted; this holds the sack on to the moving belt until it is firmly held by the projections thereon. Once lifted up the slope, the sack comes to rest on the horizontal parr (5) whence it can be manually rolled on to the vehicle. .


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