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Patents Completed.

25th January 1912
Page 22
Page 22, 25th January 1912 — 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.

Albion's Magneto Armature.

Albion Motor Car Co., Ltd., and T. B. Murray.—No. 188, dated 4th January, 1911.—The laminations for a Siemens J-1 armature have stamped in them an II-shaped slot as shown in the accompanying illustration. The fonr ends of

this slot have a keyhole-like enlargement to accommodate bolts by which the armature is assembled. The advantages of this construction are, firstly, the mechanical construction is improved owing to the fact that four bolts are used instead of two, and that these bolts are situated nearer the pole tips: secondly, that the electrical losses are reduced owing to the fact that fewer eddy currents are set up in these bolts. This is obtained by the presence of the slot in the laminations, for these gaps direct the magnetic flux, so that practically no magnetic lines pass through the closed circuits formed by the bolts and end plates.

Commercial Motor v. Airship.

Fried Krupp Aktiengesellschaft.—No. 18,278/11, dated under International Convention, 8th May, 1911.—This specification describes a carriage for guns to be mounted upon motor vehicles, being particularly suitable 'for fighting rapidly moving targets such as air vehicles." The slide carrier of the gun which carries the gun barrel is mounted by horizontal trunnions on an upper carriage which is supported on a ball-bearing turntable. Between the upper carriage and the slide carrier there is interposed the elevating gear comprising a toothed sector. The undercarriage is supported on the axle of the gun carriage, and at its rear end extension pieces with the usual spade are provided. The platform of the vehicle is equipped with channel rails for the gun-carriage wheels and with the necessary superstructures for ammu.

nition teas and the like. Provision is made for securing the undercarriage to the motor vehicle, so that the gun may be fired in all directions from the vehicle or it may readily he removed and used on its own carriage.

A Rotary Cylinder Pump.

H. S. Hele-Shaw and F. L. Martineau. —No. 29.554, dated 20th December, 1910.—This invention relates to improvements in rotary radial-cylinder pumps of the type described in British Letters Patent, No. 12,574, of 1909, wherein radial cylinders rotate about a circular valve, the reciprocation of the pistons being obtained by means of an eccentric

ring or cam path. It was found im possibk to run these pumps at a very high speed owing to the fact that the delivery of pressure and the centrifugal force due to rotation both acted in the same direction on sonic of the members. The present invention has for its object so to arrange the pump that these two forces are in opposition, so that much higher speeds may be utilized. A central fixed valve is provided with a double set of ports coupled in pairs, one pair communicating with the inlet and the other with the outlet. The cylinder body rotates about this valve in the ordinary way, the pistons being moved in and out by the ordinary eccentric ring, the ports being so arranged that the pump is double acting. These passages are conveniently formed at the side of or between the cylinders, the outer ends of the cylinders being closed by screw caps. If desirable, the eccentric ring may be capable of having its axis move, so as to provide for variation of stroke and reversal. The method of lubricating this ring is also illustrated.

Another Sleeve-Valve Engine. 3

E. W. Bowen and W. A. Richards.No. 26,781, dated 17th November, 1910. —In the engine described in this specificatiou the cylinder head fits over the top of the cylinder, and is bolted to a flange space some distance down from the upper end of the cylinder. Two circumferential passages are formed on the cylinder head, and open into the combustion chamber beyond the end of the cylinder. A sleeve valve is interposed to control the inlet and exhaust ports opening into their respective passages. This valve bears upon the outer edge of the cylinder walls, the flange forming the division between the inlet and ex haust passages and in he recess formed in the cylinder head. The construction here illustrated is for an air-cooled rotating-cylinder engine.

A Wolseley Silent Cut-out.

The Wolseley Tool and Motor Car Co., Ltd.—No. 634, dated 10th January, 1911. —This invention relates to silencers and consists in a form of construction which allows the exhaust, when the cut-out is in operation, to escape at the usual point so that it does not annoy the occupants of the vehicle. Various constructions are illustrated, in these the silencing action is obtained by allowing the exhaust gases to enter the perforated tube which lies

inside the closed casing. Stops or partitions are fitted in this tube so that the gas passes out through the holes in the one section into the next section and so on. finally escaping on the right-hand side. The by-pass in the construction illustrated consists of a straight-through tube controlled by a butterfly-valve which, when open, allows the exhaust. gases to pass straight through and out at the usual point. Other arrangements of the by-pass and silencing tubes and the necessary valves are described and illustrated.

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