Patent GB-190502870-A (GB)
Inventor: HARTRIDGE WILLIAM BAKER
Filed: 1905-02-11
Granted: 1906-02-08
Abstract: 2870. Hartridge, W. B. Feb. 11. Tyres, elastic other than pneumatic; felloes or rims.-Wheels for motor omnibuses and other motor road vehicles are provided with radial or other recesses, in single or multiple tracks, adapted to receive blocks of rubber or other resilient material capable of radial adjustment for wear ; or the recesses may be of different depths, adjustment being effected by circumferentially shifting the blocks from one recess to another. In the twin-tyred wheel shown in Figs. 1 and 3, rubber &c. blocks 3, dovetailed on to base-plates 4, are secured to the bottom of radial chambers or recesses 2 by bolts 8, or by dovetailing the bottom of the chamber to receive the base-plate. The blocks 3 are arranged to break joint with and overlap those in the adjacent track. Packing-pieces 9 are inserted as the blocks are pushed further out on account of wear. After such adjustment has been carried as far as possible, the remaining rubber etc; section may be vulcanized on to a new block. The sidewalls of the chambers 2 may be plain or ribbed, the end-walls 2<a>, Fig. 3, being preferably tapered as shown to facilitate insertion of the blocks. Coverplates 12 are screwed or otherwise detachably secured at the sides of the wheel. The spaces between the chambers in each track may be left vacant or may have a wooden or other filling 15 which may be provided with a rubber facing 16. In modified means for adjustment, the side-walls 12 are stepped to receive correspondingly-formed flanges on the base-plates 4 ; or angle-irons, having a pin- and-slot connexion with the base-plates, are secured by screws passed through holes in the side-plates. In the form shown in Fig. 9, the tapering blocks 25, of different radial depths, are adjusted for wear by a ' step-up' arrangement. More than one sequence of blocks may be used to complete the circumference of the wheel. The blocks may be arranged diagonally so that a continuous running surface is obtained. In another arrangement, the chambers are alternately oppositely inclined, the blocks being of somewhat triangular section to prevent skidding. In a further modification, the blocks are twisted and seated in similarly-formed chambers so that at the tread the segments are diagonally disposed and present a practically continuous surface. In the form shown in Fig. 22, each track of a twin rim has a continuous elastic-tyre section 64 extending more than half the circumference of the wheel and dovetailed on to a carrier consisting of a series of links 65, hinged together at 66, the ends of which are passed through the end-walls 67 of the rim chamber and secured by nuts 68. When worn, the tyre section is removed from its carrier and fitted on a carrier of greater radial depth. In a modification of this arrangement, the tyre consists of a series of elastic sectors each dovetailed on to a link of the carrier, adjustment for wear being effected by fitting another link carrying its elastic sector, and inserting suitable packing-blocks. In a further arrangement, the carrier consists of a complete ring formed with shoes in which the elastic sectors are pinned or otherwise secured, adjustment for wear being effected by the use of a series of such rings all of the same internal diameter but with shoes of different radial depths. Creeping is prevented by means of ribs or stops on the inner circumference of the carriers and the bed of the rim. In another form, adjustment of the tyre (or tyre sections) is obtained by means of a series of flanged two-part rims in which the bed is arranged at different radial distances from the outer circumference of the flanges. Referring to Fig. 39, radial adjustment of the blocks 38 is effected by inserting packing-blocks 9 and removing strips 91 which are pressed on to the tyre flanges 89 by bolts 92. In another form, the resilient blocks are threaded for adjustment in their chambers or recesses, which are similarly threaded or fitted with liners. Sets of wheels, with single or multiple tyres, may be formed with tyre recesses of different depths so that the worn sections may be interchanged. In some cases, twin-tyred wheels may have one tyre nf ordinary construction. Specification No. 27,345, A.D. 1904, is referred to in the Provisional Specification. Tyres, pneumatic &c.-According to the Provisional Specification, the tyre sections may be supported on pneumatic or other cushions. In the case of a pneumatic cushion, adjustment would be effected by further inflation. The tyre may be fitted with a non-slipping or other cover.