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Patents Completed.

25th July 1912, Page 22
25th July 1912
Page 22
Page 22, 25th July 1912 — Patents Completed.
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A Sectional Spring Wheel.

G. P. Milnes, No. 14,250, dated 15th June, 1911. — This specification describes a resilient wheel for road vehicles which comprises, broadly, two parts (1) a hub member with its spokes, and (2) a sectional felloo resiliently sup parted on the spokes. A recess is formed in the end of each spoke to receive a rubber ball, and the felloe is composed of a number of separate segments which extend between two adjacent spokes, and have recesses at each end which fit on to the rubber ball. A gap is left between the segments to allow some play, and also to provide non-skidding edges, or if it be desired, cover plates may be inserted to act ak protectors for the rubber balls. The various segments have their radial motion limited by a pair of bolts pass. ing through a backing plate, which grip circumferential flanges joining the spokes on each side of the wheel.

A Cardan-shaft Bearing.

Daimler Motor Co. (Germany), No. 14,597, of An, dated under International Convention, 27th August, 1910.—The object of the construction described in this specification is to diminish any stress on the gearbox from end thrust of the carclan shaft, by transmitting such endthrust directly to a cross-bar of . the frame. The gearbox is bolted to two cross-members and a yoke is fixed rigidly to the side of the gearbox near its point of attachment to one cross-member. The thrust bearing for the end of the cardan tube is formed in this yoke and encloses the universal joint. A brake pulley may conveniently be arranged

around this thrust-bearing, the brake being carried on bolts passing through the yoke and secured in the end of the gearbox.

A Front-wheel Drive.

R. W. -Vining, No. 14,712, dated 21,t June, 1911.—This specification describes an improved construction for providing a front drive to motor vehicles of the type in which Ackerman steering is employed. The two figures show a plan and section respectively of this construction. The engine and gearbox are mounted on the main frame of the vehicle, with the gearbox in front of the engine. Preferably, the driving-shaft of the gearbox is in alignment with the engine-shaft, but has the clutch interposed between them. The drive is taken from the gearbox back on

to a sleeve which is loose on the drivingshaft, and carries a worm which drives a worm-wheel on the differential in the ordinary way. The differential lies between the front wheels, approximately in line with their centres, and transmits the drive to each of them through short shafts provided with universal-joints in the ordinary manner. The two front wheels are carried on a dead axle extending underneath the driving axle. The driving-shaft is extended through the gearbox and out at the front for the attachment of the starting handle.

Napiers Slit Their Pistons.

W. F. Rainforth and D. Napier and Son, Ltd., No. 6E326, dated 19th March, 1912.—One source of noise in an internalcombustion engine is due to the fact that

the piston cannot be maintained an exact fit in the cylinder. There is consequently a slight knock at the reversal of the stroke. This is overcome in the present invention by enlarging the lower end of the piston, and making it a yielding fit on the cylinder. A number of longitudinal slits are formed in the enlarged portion dividing it up into a number of sections, each of which can yield comparatively easily. The slits may be formed parallel to the direction of the stroke, or they may be inclined to improve the lubrication.

An Easily-fitted Spare Rim.

H. Muller, No. 19,951, dated 7th Sep temper, 1911.—This specification de. scribes a spare rim which can be secured to the side of a wheel, and has incorporated with it a lifting device, so that there is no need to use a jack when fitting this rim. Four spokes are used for reinforcing the rim, and a bracket with a longitudinal slot is carried on them at the middle. In this slot there is a ring which fits over the hub of the wheel, and a double screw and nut couples the ring to the rim. When the rim is to be fitted to a wheel, the central ring is dropped to its lowest position and fitted over the hub when the rim is placed alongside the wheel. This is possible even although the tire be flat, because of the movement of the ring allowed by the screws. The nut is then screwed up until the hub is lifted to the centre of the rim and the latter is then secured to the wheel by some suitable form of clamp. Preferably one side of the rim has a conical flange upon which the wheel bears so that the strain is distributed more uniformly.

A Novel Oil Pump Packing.

J. McLaren and H. McLaren, No. 2677, dated 1st February, 1912.—In oil-pumping apparatus, if efficient working be desired, the plunger must be an absolutely true fit in the cylinder in which it works. This useally means expensive machining. According to this invention a hole is made transversely to the bore of the pump so as to cut through it, and if desired the bore is enlarged for a short distance on each side of the transverse

hole. The plunger is arranged in its proper position in the bore, and white metal is poured in to ensure a close fit around the plunger.

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