A Novel System of Rubber Suspension
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The Coy System in Which Rubber Blocks Take the Place of Steel Springs
WE recently forecast the introduction of a new suspension system in which rubber was to take the place of the conventional springs. We are now-able to explain its principle and to 'outline the nature of the mechanism employed.
Known as the Coy rubber-suspension system, the device has been evolved by the Kensington Service Garage and Engineering Works, 2-29, Queensgate Mews, London, S.W.7, the proprietor of which concern, who is the patentee of the invention, would be glad to get into touch with manufacturers or others Interested in the system, and who would assist him in its further development.
, Briefly, the leaf springs are replaced by steel bars made in two parts, suitably jointed, and pivoted by means of Silentbloc bushes to the chassis frame, whilst a resilient rubber block is interposed between each part of the hinged steel bar and brackets bolted to the frame member. By a suitable combination of. quality of rubber and choice of distances from pivot to rubber and rubber to axle;" an efficient suspension has been evolved.
During a short run in a car thus equipped we were impressed by the buoyancy of the system ; shocks seemed n36 to be converted into gentle impulses, and transitions from smooth to rough road _surfaces could be made at considerable speed with an almost imperceptible change in the nature of the motion of the car. At the same time, the lateral rigidity afforded by the Coy system ap peared good and there was an absence of side sway, which is claimed to lessen the possibility of skidding.
• The main advantages of the system. appear to be its simplicity and cheapness, that it requires little or no maintenance and diminishes the strains imposed by road shocks upon the chassis generally, whilst the ease with which adjustments may he made to afford the most suitable springing effect for any specific weight of load, and the removal of the need for shock absorbers, are important points.