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With Intent to Improve.

23rd August 1917, Page 22
23rd August 1917
Page 22
Page 22, 23rd August 1917 — With Intent to Improve.
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A Weekly Summary of Recent Patents, of Interest to the Maker and User of Commercial Motor Vehicles.

Motor-vehicle Springing.,

M.R. Estrault-Pelterie, of 11, rue de Milan, Paris, describes in specification No 107,750 an improvement on a pre

vicars patent. It concerns an arrange,inegt of springs for the rear axle of a morir vehicle. The construction is , dearly shown on the drawing which we reproduce, and involves the use of two speings of. different length. These are. Seaured at their forward ends to a com• DIM] pivot; the .longer one is attached at its rear end to an ordinary shackle, the ether is attached to the axle.

A Rotary Plough Improvement.

All those who have been following the progress of the agrimotor will be acquainted with the work that has been clone in this regard by M. Joanny Maillet, of Laiz, pres Poniede-Veyle (Ain), France. An abridgement of specification No. 100,314, Which describes a recent patent taken out by him in .connection with his . well-known inntore driven rotary plough, cannotiail to be of interest to that portion of our readers. , The present invention is concerned • prineipally, with an improved method of altering the speed of rotation of the implement as compared with that of the tractor. In an implement of this type, it is customary to make some such arrangementfor the differentiation of these speedo so that different degrees of pulverization of the soil can be effected. M. lelaillete* in order to attain the re.quisite variations of speeds, incorporates, . two sets of two-speed gears in the design of his machine, one of which controls simultaneously the velocity of the agriMotor as .a whole, and at the same time alters the speed of revolution of the Implement; the other alters only the velocity of the tractor. Accordingly, there are four speeds of the machine as a whole and two rates of revolution,eef... the implement; for any one engine speed. The engine; drives through a clutch to a two-speed-gearbox; from this box issues a tailshaft on the end of which is a. bevel pinion, which drives a crossshaf t. On this Shaft are monated two pinions of the other twei-speed 'gear; it also carries the Sprocket which drives, by chain, the tillage implement. The second speed gear drives the ground -Wheel of the vehicle. Thus the first gear eontiolai the *speeds of both trader and implement, while the second only interferes with the drive to the tractor,

WO • The four claims cover, besides the Main featuee, which we have described, several important details of the construction of the tractor. They refer to the method of mounting the near-side wheel of the tractor so that the height of the machine can be altered in relation 'tothis wheA, to the utilization of the hollow journal on which this wheel is mounted as a support for a bearing for a, motion shaft which passes through it, and to the construction of the implement which

is used -in conjunction with this agri mtor.

It should be noted that the implement can be detached a-nd the vginde eased independently as a tractor or for some other similar purpose.

An Internal. combustion Engine Which is Fitted Throughout with •Roller •Bearings.

Mr. T. LB. d'Orville, of Cross Deep Lodge, 'Twickenham, describes a corn' plate system of engine `beaxinge in specificationeNo. 107,052, which system. ' involves the use of roller :bearings for all the main bearings of the engine; the gudgeon pin, connecting-rod big end; and crankshaft main bearings are all so fitted,. and the' inventor states that in his opinion it is essential, if roller bearings be fitted to anyof' the abovementioned bearings, that they be fitted to all. Ho further claims it to be a sine qua non, in a construction which in. volves the war of scaler bearings, that a 'built-up .crankshaft, as distinct from a one-piece component, must be incorporated in the deSign; if the fullest advantages are to be derived therefrom.

For the gudgeon pin taper rollers* are. -used, 'as our" drawing, 'which is reproduced from the specification, sheWs ; the ecnnecting rod is fastened to the pin, which is turned down at each end to receive„the inner races of the bearings. Three other suggested arrangements Of the. gudgeon-pin bearings are illustrated on the drawings which accompany the . specification. The main feature, which may be observed on the one which we reproduce, is common to all. This feature, which is a notable one, is the fixing of the connecting rod laterally at the small end, in the piston, instead of, as is almost universal, leaving it free to move sideways in the piston, and, fixing it laterally on the crankpin. The construction of ,the' built-up _ crankshaft is described at some length, and several alternative methods of arranging the roller bearings on both big euds and main bearings are described. The drawing shows a crankshaft suitable for a V-type engine, and each of the two connecting-rod and main bearings depicted shows different constructions of those bearings.

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People: T. LB
Locations: Milan, Paris, Orville

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