Patents Completed.
Page 18
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TIRES.—Midgley.—No. 13,141, dated (under Convention) 11th September, 1R06. —A series of helices (H) are embedded in the tread of the tire. These are interlaced, as shown in Figure 1, and are so embedded in the thickness of the tire (T) that they lie nearly flush with the tread of the tire. When the tire is in use, both the rubber of the tire bed and the metal of the embedded wire helices, come into contact with the roadway, and on slippery surfaces, such as wet asphalt, the thin film of water which causes an ordinary rubber tire to slip, is penetrated by the un yielding metal which comes into direct contact with the road bed and engages frictionally therewith. In this way the tendency of the tire to slip is greatly reduced.
CARD URETTER. — Lehmann. — No. 29,014, dated 19th December, 1906.—According to this invention, the admission of additional air is effected through the medium of a valve (8) formed of a metal disc on the upper side of the rod (7), guided in a casting (8) which forms at
the same time the seating 9) of the valve, and provided with an air-irrlet. The valve rod (7) extends below the guide (8) into a cylinder or dash pot (11) filled with oil. The rod (7) carries, in the cylinder, a disc 112), the diameter of which is slightly less than the inside diameter of the cylinder (11), and this is provided with holes (13) enabling the oil to pass below
the disc (12). It will be seen that the spring (17) has a tendency to keep the valve (6) against its seat (9). When the speed of the motor is low, the air only enters the carburetter through the ordinary tubular inlet (2), the reduction of pressure not being sufficient to raise the air valve (6), but, if the speed of the motor increases as well as the velocity of the air in the inlet tube (2), the quantity of liquid delivered by the spraying device (3) becomes too large, and the explosive mixture is too rich in combustible gas. In this case the valve (6) rises in consequence of the increased lowering of pressure, and allows the .admission into the carburetter of a quantity of additional air, which is determined by the section of -the annular space existing between the air valve (6) and the sides of the passage (21).
REVERSING GEAR. —James. —No. 27,916/06, dated 7th December, 1906.—The
driving shaft (a), and the driven shaft (b), are in line; they carry bevel wheels (d, which gear with bevel wheels (e) secured to a transversely-arranged spindle fixed to the casing (fl. Clutches (m, 1) are provided, the outside members of which are secured to the casing (h. These clutches are operated by the handle (r), and are connected together by the rod (al) in such a manner that, when one clutch is in operation, the other is inot-erative. When the clutch (1) is in operation, as shown in Figure 1, both shafts rotate in one direction, the drive taking place through the casing (f), the bevel wheels being locked together. When the clutch (m) is in operation, the casing (f) is held stationary, and the shaft (b) is driven in the opposite direction through the medium of the bevel gear.
HYDRAULIC CLUTCH. — Clifton.— No. 27,939, dated 9th December, 1906.— This invention relates to hydraulic clutches, in which tho working fluid is arranged to resist the relative motion of two, or more, moving parts, when power is to be transmitted. The flywheel (a) carries a number of radial cylinders (b), each end (b1) being connected through a suitable cock (c) with a central chamber (el); these pistons are of the trunk type. The pistons (d) are operated through connecting rods from a crank pin (e). The driven shaft,--or follower (f), enters the casing through a stuffing box (g) and carries a gear wheel (h). Planet wheels (1) are mounted upon a spider (1) which runs freely upon an extension (fl) of the driven shaft (f) and carries the crank pin (e). The casing afforded by the driver, or fly wheel, and enclosing the cylinders' (b),
and other parts, is wholly, or in part, filled with oil or other suitable liquid. Means are also provided for simultane ously opening, or closing, the cocks, so as to allow, or prevent, relative movement of the pistons within their cylinders. It will be seen that, when the cooks are entirely closed, relative motion is prevented between two members of the epicyclic train. The whole, therefore, rotates as one piece.
COTTER PIN.—Marx and Another.— No. 13,788, dated (under Convention) 14th June, 1908.—The pin consists of a piece of half-circular metal folded back in such a way that the two portions (1, 2) fit exactly against one another to form the tail of the pin. The extremities (3, 4) are folded back outside so as to encompass the cylindrical shape of the bolt (7). The tail pieces (5, 8) form springs for retaining the pin in position.