Patent GB-190400809-A (GB)
Title: Improvements in Spring Wheels for Vehicles.
Inventor: ROBINSON ARTHUR SAMUEL FRANCIS
Filed: 1904-01-12
Granted: 1905-03-11
Abstract: 809. Robinson, A. S. F. Jan. 12. Spring wheels.-Consists of an arrangement of wheel in which a flange secured to the hub, or to the rim, fits between two annular plates on the rim, or on the hub, and in which the thrust device between the hub and rim portions consist of spring trunnions pivoted on the one part and adapted to ride up inclined tracks on the other part. In the form shown in Fig. 1, in which the hub flange b is recessed to clear the distance-pieces c of the rim flanges a, the rim is of Z-section, the outer flange a being extended beyond the horizontal web of the rim to secure the tyre thereon. A light cover-plate is secured to the flange on one part of the wheel and is arranged to overlap the outer of the two annular plates on the other part, an annular pad being interposed between the overlapping plates. Spring levers s, supporting roller carriages u with rellers v bearing against curved spring guides 1 secured on the rim, are connected around the wheel by pieces t pivoted at w to the hub flange b.To prevent rattling, supplementary springs 4 may be fittedunder the guides. Two forms of the curved guides1 are shown in Fig. 1. In another form, Fig.4, each guide consists of two curved segments 1 pivoted together on a pin 6 secured to the hub, or to the rim, portion and caused to bear against the rollers v by springs 7. As shown in Fig. 1, the connection between the carriage u and springs s consists of a lever 9 pivoted to the clamping-bolt 8 of the springs and fulcrumed on the hub flange at wand to the roller carriage at 10. To limit the outward motion of the bolt 8 when in the upper portion of the wheel, it is pivoted to a slotted link 11, fitted in a socket 14 which is resiliently mounted on a spring 16 in a socket 15 secured to the hub. Under excessive load, the outer end of the socket 14 bears agains the bolt 8. In the form shown in Fig. 4, the thrust device u is fulcrumed to a lever 30 pivoted at its ends to links 31 bearing through springs s on eye-bolts 29, against the trunnions 32 of levers t pivoted at w to the rim portion. In another modification shown in Fig. 8, especially adapted for use on heavy vehicles, the springs s are fulcrumed in blocks 20<a> adapted to slide in radial slots 21 formed in the side-plates secured to the rim. The ends of the springs are connected by links 23 to levers t pivoted at w to the rim portion. The fulcrum pins are provided with thrust rollers v bearing on curved guides 1 on the hub portion ; or the spring levers s may be mounted on the ends of levers fulcrumed on lugs secured to the rim portion. The compression of the springs s may be adjusted by screws s*. A forked block 40, embracing the trunnion 20<a>, is fixed to the outer end of the adjusting-screw s*, the inner end of which is fitted with a screwed bush 41 working in a recessed block 43 pivoted at 44 to the rim portion, and bears against a spiral spring 45 which keeps the forked block 40 in contact with the spring trunnion 20". In a modification of this arrangement, the parts 40, 41, 43, 44, 45 are dispensed with and the adjusting-screw s* bears directly on the hub. In a further modification, Fig. 7, the thrust device u is carried on the outer end of a radial rod 27 which is pivoted to a lever 26 bearing on springs s arranged between the lever 26 and the nut 28 of a bolt 29 pivoted to the lever t ; or the lever 26 may be connected directly to the lever t by springs s as shown in the lower part of the Figure. A driving-link 9 connects the rod 27 to the hub portion. The inner end of each rod 27 is connected by a link 27<a> to the hub portion. Reinforcing springs 16 may, as shown in dotted lines at the upper part of the Figure, be threaded on radial guide-rods 27. Suitable oil and dust proof cover-plates may be fitted at each side of the wheel, and the tyres may be secured by bolts in the ordinary way. The thrust-transmitting device, when in the form of a segmental roller, as shown in the upper part of Fig. 7, may be provided with a spring path as described in Specification No. 20,583, A.D. 1903.