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Patents Completed.

10th April 1913, Page 20
10th April 1913
Page 20
Page 20, 10th April 1913 — Patents Completed.
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Which of the following most accurately describes the problem?

Complete specifications of the following patents will be sent to any address in the United Kingdom by the Sale Branch, Patent Office, Holborn, W.C., upon receipt of eightpence per copy.

A, Novelty in Toothed Gearing.

A. B. Von Bonfort, No. 29,811, of 1912, dated under Liternational Convention, 28th December, 1911.—In the usual form of toothed gearing it is necessary to provide for a sliding movement, of one of the wheels when it is required to engage or disengage two wheels in mesh. The present invention obviates this necessity, for, in accordance with it, the two toothed wheels are spaced apart so that, normally, they are independent, and they are brought into gear with one another by inserting between them a part CUMposed of yielding material like a disc or belt of leather. This material fills the space between the two wheels, and is pressed by the teeth of each into the tooth spaces of the other, so that power can be transmitted from one wheel to the other, the inserted piece of leather being carried round at the same time. The accompanying illustration shows a twospeed gear constructed in accordance with this invention.

Assembling Ball Bearings.

0. Hoffmann, No. 28,217, of 1912, dated under International Convention, 22nd December, 1911.—This specification describes a method of assembling Hoffmann bearings of the type in which there are two concentric rings forming races for the balls. The rings are made of very tough steel and the bearing surfaces are very highly tempered. In order to force the inner ring into position, a small wedging piece is fitted at one side of the outer ring, and the balls and inner ring are assembled as shown in the second of the accompanying figures. The outer ring is gripped firmly in a chuck and rotated at a high speed. At the same time pressure is applied to the head containing the inner ring, and the balls are caused to travel up the wedging piece, so that they can slip into their proper places in the races.

Built-up Driving Keys.

J. T. Tullis, No. 25,620, dated 8th November, 1912.—In carrying out this invention, keys for shafts are built up of sections stamped from scrap steel pla a or other suitable metal, inserted in the key-way as shown in the accompanying drawing. Packing pieces are provided at each end of the key-way, which, if it be undercut, is widened at one end to permit the insertion of the tapered sections. When the key has been built up to the required size, the space remaining at the end may be filled with white metal to retain the sections in position.

Cylinder-head Cooling.

M. B. B. Boyd, No. 14,219, dated 31st January, 1912.—In order to obtain more efficient cooling of the cylinder head of an internal-combustion engine, a transverse partition is formed in the water jacket of the head. This extends from the top nearly to the bottom of the jacket. The water is caused, by this means, to circulate down one side and up the other aide of the cylinder head. In following this passage the water passes near the sparking plug, so helping to keep it cool.

Motorbus Body Construction.

C. Dodson, No. 10,438, dated 2nd May, 1912.—In the construction of bodies for buses or suchlike vehicles, the transverse beams of the bottom framing overhang the longitudinal side-members of the chassis. In the accompanying drawing one of the chassis side-members is shown in end elevation ; it consists of a composite wooden and steel-plate beam. The transverse beam of the body overhangs it on the right-hand side, and to provide sufficient strength this second beam is shaped in the manner shown. The vertical depth of the overhanging part is increased to bring it level with the bot

torn of the chassis frame member. A wedge is introduced between these two parts 90 that the overhanging section of the beam is supported by a side thrust from the chassis. The various parts are held together by U-shaped straps, and the wedge is locked in position.

A New Rotary Valve.

R. Dubois, No. 5022/12, dated under International Convention, 6th April, 1911.—This invention relates to rotary valves of the oscillating type. The principal feature of this construction is that the valve comprises a hollow cylinder slotted down one side, the slot being suffi ciently wide to provide communication between the inlet conduit and the cylinder port, or the exhaust conduit and the cylinder port. The valve is open at its ends, and its construction is such that sufficient spring is left in it to allow of its being expanded by the compression in the cylinder and thereby forced tightly on to its seating all round.

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