US1235196A - Shaft-coupling. - Google Patents

Description

E. FUCHS.

SHAFT COUPLING.

APPLICATION FILED AUGl311 1915.

1,235, 1 96. Patented July 31, 1917.

i] N T TED STATES PATENT QFFTQE,

ERNEST FUCHS, OF BILLANCOURT, FRANCE, ASSIGNOR T0 LOUIS RENAULT, OF BILLANCOURT, FRANCE.

SHAFT-COUPLING.

Application filed August 31, 1915. Serial No. 48,354.

To aZZ whom it may concern:

Be it known that I, Ennns'r Focus, a citizen of the French Republic, residing at Billancourt, Department of the Seine, in France, have invented certain new and useful Improvements in Shaf -Couplings; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to a mechanical device for automatically controlling the lead of the ignition for all conditions of operation of the engine.

It has been particularly sought to obtain in the present invention, a device in which the angular displacement of the engine shaft relatively to that of the magneto can be controlled by masses adapted to move away from the center only to a comparatively small extent, so as to reduce the variations produced by centrifugal action. The displacements of a number of similar masses are totalized in the invention in such a manner as to obtain a resulting angular displacement equal to the sum or the respective angular displacements of each mass.

Similar devices have already been proposed, comprising masses formed with grooves or slots adapted to be engaged by pins, thereby forming a continuous chain in such a manner that the displacements obtained for each mass are totalized. These devices have the disadvantage, however, of being complex from the constructional point of view on account of the difiiculties presented in forming the grooves or slots in the masses.

The present invention makes use of a device comprising movable masses constituting a chain the elements of which bear one on the other through the medium of rollers. the curvature of each mass being determined in such a manner that it is possible to give the angle of lead the desired value.

The accompanying drawings illustrate, by way of example, a plurality of constructional forms of the invention.

Figure 1 illustrates the automatic con trolling apparatus, the plate controlling the magneto being removed.

Fig. 2 is a vertical section through Fig. 1;

Fig. 3 is a modification, the plate controlling the magneto being removed;

Patented July 31, 1917.

Fig. 4c is a vertical section through Fig. 3;

The constructional form illustrated in Figs. 1 and 2, comprises a series of weights 1, 2 9 guided by means of axes 10 in circular grooves 11 formed in two plates 12, 13 relatively movable.

The plate 13 is integral with the engine shaft while the plate 12 is mounted on the magneto shaft.

Each weight is provided with a roller 14; which bears on the back of the preceding weight, the curvature of which is designed with a view to giving the angle of lead the desired magnitude.

The first weight 1 bears on, or rather is pushed by a pin 15 secured on the driving plate 13.

The last weight 9 has no roller, but is pivoted on an axis 16 secured on the plate 11 controlling the magneto. Under the action of the centrifugal force, the weights 1, 2, etc., tend to rotate around the axes of their rollers; the eiiect of this tendency is to increase the distance between two consecutive rollers and elongate the whole of the chain.

A coiled spring 17 secured at 18 on the driving member, and at 19 on the driven member, tends to bring the latter into a lagging position.

By giving the backs of the weights 1, 2, etc., a suitable curvature, the angle of lead may be varied according to a law determined in regard to the speed.

Figs. 3 and 4 illustrate an apparatus constructed in a similar manner to that shown in Figs. 1 and 2, but in this case the weights 1, 2 9 and 1, 2 9 are separated in two distinct chains or series, arranged symmetrically with respect to each other, and to the center of rotation, for the purpose of dynamically equilibrating the apparatus, their axes being designated 10 and 10 respectively, and each weight having a roller 14 or 14. In this modification two pins 15 and 15 are provided, bearing respectively on weights 1 and 1.

The two apparatus described hereinbefore, have the advantage of having weights which vary very little the distance from their center of gravity to the center of rotation. In this manner a more regular and less sudden variation of the centrifugal force is obtained than with devices employed heretofore in which balls move appreciably with respect to the center of rotation.

It is obvious that modification may be made in the apparatus described hereinbefore, for instance, the coiled springs may, in particular, be replaced by a single spiral spring.

hat I claim is 1. A combination with a driving shaft and a driven shaft of a coupling device interposed between the two and comprising a circular series of pivotally and slidably mounted weights serving to transmit motion from the driving shaft to the driven shaft, each of said weights having a roller bearing upon the adjacent weight, and the surface of each weight upon which a roller bears be ing curved to efiect an elongation of the series ofweights when they are thrown outwardly by centrifugal force, and means whereby such elongation of the series, of weights displaces the shafts angularly with respect to each other.

2. A combination with a driving shaft and a driven shaft of a coupling device interposed between the two and comprising two series of pivotally and slidably mounted weights serving to transmit motion from the driving shaft to the driven shaft, each of the weights of each series having a roller bearing upon the adjacent weight, and the surface of each weight upon which a roller bears being curved to effect an elongation of both series of weights when the same are thrown outwardly by centrifugal force and means whereby the elongation of the series of weights displaces the shafts angularly with respect to each other.

3. A combination with a driving shaft and a driven shaft of a coupling device interposed between the two and comprising a plate secured to the driving shaft and a plate secured to the driven shaft, a series of weights serving to transmit motion from the first namedplate to the second, the adjacent faces of said plates being provided with circular recesses, a pin upon which each of said weights is mounted, the extremities of each of said pins being guided in said recesses, a roller associated with each of said weights and bearing upon the adjacent weight, the surface 'of each weight upon which a roller bears being curved to effect an elongation of the series of weights, when the same are thrown outwardly by centrifugal force, and means whereby such elongation of-the series of weights displaces the shafts angularly with respect to eachother.

In testimony whereof I affix my signature, in presence of two witnesses. i

' ERNEST FUCHS. \Vitnesses:

GHAs. P. PREssLY, HENRI COHEN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, D G.

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