An Alternative to the Gudgeon Pin
Page 64
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A Resume of Recently Published Patent Specifications
IT is not often that we have to deal with a patent which hails from Mexico. The present invention, however, is that of Herman Dock, of Guadalajara, Jaleco (Apartado Postal 132), Mexico, and is numbered 345,723.
As will be seen from the drawing, a domed member is fixed to thepiston, and a corresponding depression is formed in the upper end of the connecting rod, the outside of this part being machined to a curve struck from the same centre. An outer member is adjustably fixed, so that an easy working fit is obtained between the piston and its rod.
The inventor claims the following advantages for this arrangement:— Greatly increased wearing surfaces, greater strength, practical immunity from breakage, automatic accommodation to slight misalignment of piston or cylinder and crankshaft, improved facility for lubrication, etc.
The specification describes several methods which might be employed for securing the adjustable member, most of which employ something in the nature of a method of expanding a split member by means of a taper setscrew.
The idea appears to have considerablemerit, providing that some satisfactory means can be found for securing the adjustable part in such a way that .it will not distort the thin walls of a .piston.
A Ball and Socket Joint.
LATENT No. 345,747, by Emde and Meissner Metallwaren-Fabrik M.B.H., 108, Siegesstrasse, Weyer, Rhineland, Germany, relates to ball and socket joints which can transmit torque, for use in automobiles and other classes of machine.
As will be seen from the drawings, the intermediate shaft is splined so that it can lengthen and shorten, and it is provided with a ball at each end. Each ball has what is described as a meridional groove, which engages with two balls accommodated in recesses on each side of a cup-shaped member, which receives the end of the shaft.
The arrangement might be useful for transmitting power to front-wheel brakes, but owing to the small bearing surfaces in contact and the short distance they are from the axis of the shaft, we cannot imagine it being useful for a main drive. The device closely resembles universal joints which we have previously seen. SHOWN in patent No. 344,955, by J. E. Graham, of The Chalet, Gipsy Lane, Putney, is a jack of very simple construction, light, and cheap to pro duce. It is apparently designed to be permanently fixed to all axles, so as to be ready at all times for use. The three views shown make its action so clear that little description is required.
Tbe upper arm is attached to the back plate of an axle, whilst the lower. arm is hinged to it, and can be brought in contact with the ground by means of the detachable lever shown. The hinge is of the type used for windscreens, where serrated faces are brought into contact by a spring, so that when once in position it requires some force to move it.
A By-pass for Oil in Cold Weather.
IN patent No. 345,648 Motorenfabrik
Deutz Aktiengesellschaft, of CologneDents, describes an arrangement whereby oil can by-pass an oil cooler to facilitate starting.
The specification points out that in cold weather the oil which is in a cooling device may become so thick and congealed that damage may be done to the pump and other parts when starting. To prevent this, a spring-loaded valve (d) is provided, which can open and allow the oil to pass through the pipe (e) to the filter (f), and from tUte to the lubricating system of the engine.
The oil cooler is shown by b, and the normal passage of the oil is through it and along the duct (c) to the engine, g being the regulating valve, which permits any excess of oil to pass to the engine sump by means of the pipe (h).
'rho valve (d) is loaded to a pressure of six atmospheres, whilst the valve (g): is loaded so that it opens at a slightly lower pressure. This application for a patent has become void.
A Piston Head for Airlessinjection Engines.
THE name of Daimler-Benz Aktien gesellschaft, of Stuttgart, Germany, appears in patent NO. 345,829, which relates to the form of piston head for engines of the airless-injection type.
The jet (g) is placed above the combustion chamber and is mounted eccentrically with the conical depression in the head of the piston. This is claimed to induce a rotary movement in the contents of the combustion space, which promotes turbulence.