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Patents Completed.

21st April 1910, Page 20
21st April 1910
Page 20
Page 20, 21st April 1910 — Patents Completed.
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Complete specifications of the following patents will be sent to any address in the United Kingdom upon receipt of eightpence per copy at the Sale Branch, Patent Office, Holborn, W.C.

WHEEL RIMS.—Beiden.—No. 29,632. dated 18th December; 1909.—The rim ot the wheel is formed, with side walls which taper towards the nave of the wheel, and the edges are turned inwardly

so as to form flanges. At one or more points on the periphery of the rim, the flanges are cut away to allow a number of square plates to be introduced inside the rim and to be slid along beneath the flanges round the circumference of the wheel. These square plates are bored to receive indiarubber blocks, whicli form the tire. The cut-away portion of

the rim is adapted to be closed by a special plate which is bolted to the rim. The square plates allow the indiarubber blocks to move when under load without partaking of such movement, and they are made snugly to fit the rim. SO that dirt is prevented front entering the latter.

VARIABLE SPEED GEAR. — Renault.—No. 16,568i1909.—Dated under Convention 15th July, 1908.—This invention relates to variable-speed gear, of the type in which the drive is transmitted by fluid and by independent pump systems carried by the driving and driven shafts. The characteristic feature of the present invention is that the pump and pumpactuating mechanism does not rotate with the driving or driven shafts. as is usually the case in gear of this class. The &iv. ing shaft extends into the gear casing and carries an oscillating ring. This ring rotates with the driving shaft, and is arranged to be inclined to the shaft by means of a collar and link, which is actu. ated by the change-speed lever. Mouuted on ball bearings upon the ring is an annular member which is permitted to oscillate with the ring but which is prevented trout iutatitig with the latter by means of guides provided in the gear casing. This initialer 01 ember reciprocates the plunger of a pump through the medium rif a connecting rod. It will he seen that, by varying the degree of inclination of the ring and the annular member mounted thereon, the stroke ot the pump can be varied. The pump driven by the driving shaft forces liquid 0 a pump which drives the driving shaft, and it will be seen that, by varying the stroke of the driving pump, a variable speed can be obtained.

DUAL-IGNITION APPARATUS.— Fuller and Others.—No. 19.601, dated 26th August, 1909. This invention relates to a dual-ignition apparatus in which a non-trembler coil is connected to a battery when starting the engine (the primary of the coil being interrupted by a manually-operated trembler). After the engine has started, current is supplied to the primary of the coil by a magneto. and the circuit is broken by a mechanically-operated in term pt The changing over front the

battery to the magneto is effected by a switch whidi also carries the manuallyoperated trembler. The coil is situated between the arms of the permanent magnets above the armature of the magneto, and the condenser is arranged at one end of the coil Also between the arms of the

permanent magnets. A distributing plate, which forms part of the electrical circuits, is fixed to the magneto casing so that most of the important connections can be effected before the apparatus leaves the workshop. It will be seen that the whole apparatus is combined in one structure with the exception of the controlling switch, the manually-operated trembler and the battery.

LUBRICATING P EiMP.—Carprnael. —No. 15,481, dated 2nd July, 1909.— The pump is of the ordinary manuallyoperated plunger type arranged within an oil reservoir. Between the plunger and the cap of the pump, a spiral spring is interposed, which tends to force the plunger to the bottom of the pump barrel on its discharge stroke. The pump barrel has a number of holes in the lower end thereof which communicate with the reservoir, and these holes are controlled

by a non-return valve. A discharge opening is also provided in the end of the pump barrel, and this opening communicates with it tap of the conical-plug type. Oil is drawn into the barrel by lifting the plunger and, in so doing, the spiral spring is compressed. The oil is then forced through the discharge opening by means of the spring. In order to regulate the rate of flow of the dl to the part to be lubricated, a screw pin is provided in the plug of the tap. This pin has a thumb-screw, whereby it may be adjusted, and, thus, the area of the opening in the tap increased or decreased as desired. The thumb-screw is suitably graduated, so that the position of the pin may he readily determined. The handle of the plunger of the pump is also graduated along its length, so that the amount of oil in the pump can be seen.

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