GIVING RESILIENCE TO SOLID TYRES.
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A Resilient Cushion Interposed Between Tyre and Wheel Absorbs Road Shock.
AN EFFORT to increase the resiliency of the solid • tyre for lorry wheels has been made by the Martin Cushion Wheel Co., of Chicago, and it is claimed for the combination of tyre and cushion that the durability of the solid tyre is obtained as• well as a resiliency giving riding qualities almost equal to the pneumatic.
The wheel, as devised by them has the regular solid tyre, and between it and the wooden felloe is the rubber cushion intended to absorb the shocks. Shrunk on to the wooden facie is a channel hand; carried between it and the outer channel band which carries the solid tyre • is a rubber cushion formed of three components in the case of a single-tyred wheel, and of four components in the ease of a twin-lyred wheel. The outer components in each case are made alp of laminated cotton fabric, and they are about .I in. thick. These strips have sufficient rigidity for the support of the rubber cushion inside them, whilst
the cushion strips protect the rubbeacushion from dust and wet. The rubber cushion is not solid, but has slots cut into it so as slightly to increase its resiliency. The strips and the rubber cushion are pressed solidly together, fitted into the channel band, which is shrunk on to the wheel, and the outer channel is then put into place, one side flange being detachable in order to facilitate the assembly of the units of the tyre. By means of bolts and nuts the whole is then bolted together, the holes in the s rubber cushion, through which the bolts pass, being lined with steel bushing bronzed over. The twin-tyred wheel has two steel distance rings between the two rubber cushions, but in other respects the details are the same as for the single-tyred wheel.
To the best of our knowledge this wheel and tyre are not represented on the British market.