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Patents Completed.

21st December 1911
Page 20
Page 20, 21st December 1911 — 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.

OIL-FEED PUMP. — Holt.—No. 4,883, dated 27th February, 1911.—A particular feature of the pump described in this specification is that, after each stroke discharging oil to the engine, the next charge of oil is seen above the pis

ton. In this way there is no risk of the supply's becoming exhausted, as the fact is detected by the absence of the next charge and time is thus allowed to obtain a further supply before it is actually needed. The barrel of the pump is attached below the oil reservoir and is made of glass or provided with some 'form of window by which the interior may be seen. Assuming the piston is at. tile bottom of its stroke and the space above it is filled with oil, on the upstroke the oil is transferred by suitab'e valves to the lower side of the piston ; on the down-stroke this oil is discharged and a fresh charge drawn in on the upper side of the piston from the reservoir rod for the next stroke of the pump. The spindle of the pump may be graduated so that the user can determine the quantity of oil discharged to the engine. Variant constructions are also described and illustrated in this specification.

TRACTORS.—Pescatore.—No. 14,558 1911, dated under International Convention 14th October, 1910.—In this specification there is described a tractor for motor vehicles particularly applicable for carrying heavy loads, and of the type in which the front wheels of the trailer are lifted off the ground when coupled to the tractor vehicle. The principal object of the present invention is to enable the

operation of taising the trailer and coupling it to the tractor to be performed automatically by running the tractor backwards. The back of the tractor is formed with an inclined plane having guides, and a spherical bearing on the slipper is fitted to the front of the trailer. When the tractor is backed towards the trailer the slipper engages the inclined plane and runs up it, being secured by any suitable form of latch when it reaches the top, so that the vehicles are coupled ready for transport. In uncoupling, the latch is released by the driver and the tractor starts forward. The slipper slides down the inclined guide, and the trailer is left standing on its own four wheels.

WATER GAUGE.—Brix.—No. 11,130, dated 8th May, 1911.— This invention relates to boiler water gauges of the type in which a frame is provided with a longitudinal slot, which is covered on both sides with glass plates. Two bored.out heads are provided, which, with the flat rib, constitute a single piece. These heads fit over the tubes secured to the gauge-cocks, and are held in place by nuts on the outside. The heads are bored in such a manner that the passage forms a continuation of the passage through the gauge-cock. Packing is inserted at the front and rear sides of the head, and the glass is mounted in the usual manner against the back and front of the slotted rib.

SUPERHEATER. — McLaren and Another.—No. 27,260, dated 23rd November, 1910. The superheater described in this specification is of the type used in the smoke-boxes of locomotivetype boilers, the object of the invention being to provide efficient means whereby the whole of the steam and the furnace gases are brought into efficient contact with the respective sides of the superheating surface. The steam pipes are arranged as a pair or pairs of coils of tubes, one member of the pair being superposed on the other member. The two coils are arranged in series so that the steam passes through both in sue

cession. If more than one pair of coils be used, the pairs are arranged in parallel, being connected to the steam pipe by suitable "breeches flanges." The outlet joint is of similar construction in order to allow the superheated steam in the various pairs of coils to pass into the single outlet pipe. Asbestos rope is laid along the coils to baffle the flow of gas.

RADIATOR. — Lamplough and Others.--No. 25,643, dated 4th November, 1910.—In this specification is described a radiator so constructed that the centre or cooling part is readily attachable to the top and bottom water tanks without soldering or brazing. The body of the radiator is preferably cast in aluminium and comprises a top rtank and separate sides. The e centre or cooling part of the radiator is formed with small tanks at the top and bottom and with these the tubes communicate. These tanks are provided with suitable screwed nozzles for attachment to the main top and bottom tanks. The cap in the top tank and the cleaning-out hole in the bottom tank are in line with the connecting nozzles between the tanks. The various parts are fitted together and secured by bolts in one part and connecting lugs in the other part. The expansion and contraction of the top and bottom tanks and of the centre portion are provided against by corrugations surrounding the screwed fitting.

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