Useful Ideas at the Inventions Exhibition
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TI= Eighth International Exhibition of Inventions, which is being held at the Central Hall, Westminster, and doses to-morrow (October 15), has produced several inventions that may be of interest to the motor industry.
One is a sparking-plug cleaner, the invention of Mr. H. T. Isaacs, of "Manhattan." Downs Way, Great Bookham, Surrey, taking the form of a cap which can be screwed on to the thread of a plug, cleaning the inside and, at the same time, adjusting the points to the right distance from the central electrode.
The thin tube shown in an accompanying drawing is placed over the central pin, and carries with it the scraper, which cleans the inside as the device is screwed on to the plug. Before the cap meets the shoulder of the plug the conical lower section presses the points inwards, the thickness of the tube determining the distance that they should be from the central pin.
The same inventor shows a means for positively preventing the nuts on a detachable wheel from working loose. It B16 consists of a circular plate provided with hexagon holes, which fit over the nuts. Winged nuts hold this plate to the nuts in such a manner that rattle cannot take place, whilst a smart appearance can be given to the device by means of an outer cover, which can form the hub cap and may be of bright metal, stainless steel or plated metal.
A device for fitting new facings to brakes, with the least possible delay, is shown by Major C. W. de Roemer, 20, Arthur Road, Wimbledon, London, S.W. This consists of a curved piece of aluminium with serrations on its inner surface, which mesh with similar serrations formed on the brake shoe, and which is held in place by two bolts.
The facing material is riveted to the removable sector, so that, at the time of dismantling, only the spare parts need be changed, the serrations relieving the bolts of all strain.
There are some inventions in connection with change-speed gears, but we were unable to obtain sufficient information to enable us to describe them.