Patents Completed.
Page 24
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A Flexible Tire Tread.
G. C. Taylor.—No. 14,304, dated 16th June, 1911.—This invention relates to improvements in the manufacture of treads for tires, especially those formed of rubbered textile fabrics as deecribed in Patents Nos. 12,319;1908 and 7309/1909. After the component parts of the tread are assembled, and before they are vulcanized, a series of cuts are brmed in the surface of the tread, which extend to a suitable depth into the tread but not through it. The cuts are preferably a series of parallel lines equally spaced with another similar series at right-angles thereto. The whole tread is then vulcanized, during which process the cuts are joined so that an unbroken surface is obtained. This construction is said to give a very flexible tire.
A New Rotating Valve.
F. E. Barker and E. F. Clarke.—No. 8892. dated 10th April, 1911.—This specification describes a cylindrical valve which does not oscillate or reciprocate but rotates intermittently. The hollow cylinder is divided by two longitudinal partitions into three passages; the central one ie open at each side and also at the top and controls the exhaust. Ports are provided, one in each side passage, spaced away from the exhaust port so as to give a lap. These ports are diametrically opposite one another and the two passages which control the inlet are open at their lower end. • The mixture enters from below, passes upward and redially outwards into the combustion chamber, while the exhaust passes radially inward and then upwards into the exhaust passage. The valve is driven by a Geneva gear whereof the pins are unequally spaced so as to give the proper motion to the valve.
Parcelcar Design.
J. D. Rowland and Warne, Wright and Rowland, Ltd.—No. 14,313, dated 16th June, 1911, Cognate Application No. 20,690, dated 19th September, 1911.— This invention relates to driving mechanism for light motor vehicles of the belt or chain-driven type, wherein a variable pulley is fixed on a counter-shaft (at tha lift) driving the road wheel (on the right). The latter is mounted on springs which are carried on links, and arc thereby adjusted to compensate for the variations in length of the belt. A single lever is used to control the position of the spring and the movable part of the expanding pulley. Part of the link by which this lever operates the pulley is formed as a tele-merhanisin which can
he operated by a heel-lever or a toelever to disengage and engage respectively the expanding pulley without affecting the position of the road wheel.
For ;Petrol Headlights.
N. Smith and K. Smith.—No. 23,201 dated 20th October, 1911.—This specification describes a carburetter fur producing
petrol gas on a large s,.N.tle, a, for Muni letting purposes. A series of zig-zag plates is arranged in a eloeed ehamber so 11: e the hydrocarbon flows over the w surface and is intimately mixed with the air which enters at the top. The gas is drawn off at the bottom. The plates are arranged so that the hydrocarbon flews over one side of each while the other side is in contact, with an anti-freezieg liquid. The inclination of the plates is gradually decreased from the top to the bottom in order to equalize the evaporation. Another Engine Starter.
Unterberg and lIelmle.—No. 2865/12, dated under the International Convention, 25th September, 1911.—This spedficatien describes apparatus for starting internal-combustion engines. Reservoirs ate connected on top of each cylinder communicating therewith through a back-pressure valve. In the form illustrated, this valve comprises a stop-cock and a ball-valve which is controlled by the stop-cock so that it can be held open if required. When the engine is stopping, the ignition is cut off and the valve arranged to act as a non-return valve, so that as the engine is stopping, an explosive mixture is compressed into each reservoir. The stop-cock can he closed to maintain the pressure, and when it is required to start the engine the stop-cock is opened, and caused to lift the ballvalve, so that an explosive mixture is admitted to the combustion-chambers of the cylinders. Any ordinary means of igniting these charges then enables the engine to be started. In the preferred construction all the valves are controlled simultaneously arid are interlocked with the ignition-control.
Fixing the Rim on the Felloe.
C. H. Sims.—No. 15,496, dated 4th July, 1911.—According to this invention the rim of a tire is detachably secured to the fences by means of one or more expansible keys located in recesses in the felloe. Each key is preferably formed in two parts, and it is adapted to be expanded by a pair of wedges engaging the adjacent faces of the two keys. The keys may also be tapered longitudinally, if
desired, and they may also be provided with a longitudinal rib to engage a corresponding key-way in the felloe to prevent creeping.