Patents Completed.
Page 20
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Caterpillar-type Attachment for Motor Vehicles. Wooden Wheel Hubs.
Tire Protectors, Improved Valve Gearing.
Copies of complete specifications of the patents published on this pap can be obtained from the Sales Branch, Patent Office, .flolborn, W.C. at the cost of sixpence for each specification.
M. L. Anams, No. 101,834, dated 12th April, 1916.—This specification describes a tractor attachment which can be substituted for the rear wheels of a motor vehicle to drive it over now and ice, or over muddy or sandy roads. When used on snow and ice, skids are bolted on to the front wheels. The tractor comprises a frame with two sprocket wheels, and a small driying sprocket between them which ie adapted to be secured on the ordinary driving axle of the machine. This email sprocket transmits the drive to the rear of the larger sprockets and a chain couples these two together.
The frame also carries two idler wheels, around which the chain-tread extends. Each link of this chain-tread is coupled to the chain encircling the two 'sprockets, the drive being transmitted through these links. Cushion springs are interposed between one end of the link-and a pin on the chain, the drive taking effect through the cushioning spring. The detailed construction of the various parts is described and illustrated in the specification.
A. G. RAAISAY and W. R. Doonethx, No. 15,920, dated 11th November, 1915.—The accompanying drawing shows an improved construction of metal axle box for a wooden wheel hub. A metal box coarsely threaded on the outside is screwed into the hub and is adapted to receive the fixed axle within it_ This box is tapered at each end, the tapered portion of the inner end butting against a cone on the axle. The end of the axle is reduced and screw-threaded to receive a tapered nut which engages the other end of the box. The box itself is reduced at its outer end and screw-threaded to receive the usual oil-retaining cap and washers. A washer is preferably keyed on to the reduced end of the box and fixed to the wooden hula by screws.
L. H. SWAIN, No. 14,948, dated 22nd October, 1915.—In pneumatic tiro covers with beaded edges there is usually a small strip of the rim "lying between the inner edges of the beads which in net covered or protected by them. Moisture leaking in beneath the cover sets up corrosion of the metal and this tends to rob the air-tube which lies in contact with it.
According to this invention' a protecting strip of rubber is inserted in the rim. The strip is preferably in the forth of
an endless band somewhat smaller than the rim so that it has to be stretched on it. and it eaten& laterally well under the beads on the rim. The strip is thickest along the centre line and tapers off to each side to provide a good surface for the beaded edges of the cover to bed against. The openings in this band for the valve and security bolts are reinforced ill the ordinary manner with rubbered canvas.
H. P. E. MILLER and E. TETLOW, No. 101,776, dated 24th July, 1916.—In this valve gear the crankshaft, at the bottom, drives a disc through a 4-to-1 reduction gear. This disc carries an oblong plate, on which a second oblong slotted plate is fee to slide diametrically on the disc_ The sliding plate has cam-shaped ends and is so dimensioned that the ends are engaged by fixed rollers one-on each sede of the crankshaft. When the cam fafe engages the roller, the slotted plate is shifted diametrically, and at the same time s other end is in engagement with a valve tappet so as to move the valve. The sliding plate is returned to its central position by the valve springs and tends to remain in the central position by the balance of the centrifugal forces. It is stated that. this construction renders it possible to obtain a very sudden opening and closing of the valve without subjecting the gear to undue shock.