Shock Treatment Tester
Page 70
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EQUIPMENT produced by Ferranti, Ltd., Hollinwood, Lanes, provides 1-4 quick and accurate assessment of the efficiency of suspension systems
and chassis designs in reducing shock loads. The device is described as a peak accelerometer and indicates accelerations due to shock and vibration within the range of 0.3g.-100g.
The accelerometer has been tested on an Austin Gipsy 4 x 4 pick-up over a rough track. By taking a series of readings with the probe attached in turn to a front shock-absorber arm, a chassis outrigger and the box frame underneath the seat, it was found that the degree of shock reduction between the front stub axles and the chassis frame was in the ratio of 6.5 to 1 whilst a further 1.7 to 1 reduction of shock took place between the chassis and the seat frame.
Body Sizing .1-1 A CHART available free from Pilot Works. Ltd., Bolton, Lanes, makes it possible to assess quickly the capacity of a tipping body of which the internal dimensions are known. Included in the leaflet containing the chart is a comprehensive list of material . weights and measurements.
Plastics in Detail I-1 A THREE-PART guide to all aspects of glass-fibre-reinforced plastics moulding is available from Fibreglass, Ltd., Ravenhead, St. Helens, Lanes. The first section contains an introduction to moulding with an illustrated description of the types of glass fibre available.
A comprehensive survey of the various moulding, jointing and machining techniques in common use and instructions for repairing plastics materials are given in the second part, ti36
The Ferranti peak accelerometer, for measuring the efficiency of chassis and suspension designs in reducing shock loads, is seen on test in an Austin Gipsy 4 x 4. The equipment gives a direct indication of accelerations due to shock and vibration within a range of 0.3 g. 100 g. The information is picked up by a sensitive probe which is clamped to the portion of the chassis
under test.
whilst the final section details the mechanical, physical, thermal, chemical and electrical properties of the varied laminates and a directory of the suppliers of moulding materials.
Extracting Bearings AN extractor for drawing all types of ball and roller bearing from shafts is. being marketed in this country by G. E. Sims, Engineering, Ltd., Sheffield. The Dutch tool, known as the Tracta, is applied to the bearing by a collet which is slipped over the inner ring of the bearing so that its teeth locate on the
groove between the balls or rollers. When it is in place, the extractor chuck is tightened to compress the collet.
The central spindle of the extractor is then screwed in to contact the end of the shaft and withdraw the bearing.
"X" Range Extended A COVER of 7.00-20-in. section has
been added to the range of " X " Y steel-cord tyres made by Michelin Tyre Co., Ltd., Michelin House, 81 Fulham Road, London, S.W.3. The new tyre costs .£19 10s. and can replace conventional 7.00-20-in, covers of 8-, 10and 12-ply ratings and 7.50-20-in. (8-ply) tyres. It has a carrying capacity of 26+ cwt. and, for vehicles with decreasing loads, can be used also in place of 7.50-20-in. (10-ply) covers.
More Steel Tyres THE Unisteel tyre introduced last year by the Goodyear Tyre and Rubber Co. (Great Britain), Ltd., Bushbury, Wolverhampton, is now available in a wider range of sizes. Covers offered include 6.50-20 in., 7.00-20 in., 7.50-20 in., 8.25-20 in., 9.00-20 in., 10.00-20 in. and 11.00-20 in,