US695358A - Magneto-electric generator. - Google Patents

Description

No. 695,358. Patented Mar. II, I902.

J. M. WILSON.

MAGNETOV ELECTRIC GENERATOR.

(Application filed Apr. 27, 1901.) (No Model.) 2 Sheets-$heat l.

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MIQI U K wov qx No. 695,358. v Patented Mar. ll, I902.

J. M. WILSON;

MAGNETU ELECTRIC GENERATOR.

(Application filed Apr. 27, 1901.) (No Model.) 2 Sheets8heet 2.

Ill I \ALN UNITED A STATES I PATENT OFFICE.

JAMES M. IVILSON, OF BATTLEOREEK, MICHIGAN, ASSIGNOR TO ELECTRIC SPARRING AND ILLUMINATING COMPANY, LIMITED, OF BATTLEOREEK,

MIOIIIGA N, A CORPORATION.

MAGNETO-ELECTRiC GENERATOR.

SPECIFICATION forming part of Letters Patent No. 695,358, dated March 1 1, 1902. Application filed April 27, 1901. S rial No. 57,737. (No model.)

To aZ/Z whom, it may concern.-

Beitknown that I, JAnEs MJVILsON, a citi- Zen of the United States, residing at Battlecreek, county of Calhoun, and State of Michigan,have invented certain new and useful Improvements in Magneto-Electric Generators; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable persons skilled in the art to which it appertains to make and use the same.

My invention relates to magneto-electric generators of that class in which the fieldmagnets are revolved around a stationary armature part which carries the insulated ind uctor-wires.

The object of my invention is to provide a simple and durable generator for producing electric current and one having no moving wires, which are so liable to derangement, and associated with a speed-governing device, whereby the value of the current or electromotive force produced by the machine may be determined within its limit and regulated so as to remain constant and independent of the speed by which the revolving parts are rotated.

My invention is especially valuable on account of its simplicity and adaptability to producing a current for making a spark for exploding the charge within the cylinder of gas-engines, and more particularly with gasengines employed for operating motor-vehicles.

In the drawings, Figure 1 shows an elevation in section, taken on line 1 1 of Fig. 3. Fig. 2 is a part section taken on line 2 2 of Fig. 1. Fig. 3 is a View, partly in section, taken on line 23 3 of Fig. 1. A modification of my invention is shown in Fig. a, which is an elevation in section. Fig. 5 is a view, part in section, on line 5 5 of Fig. t. Fig. (3 is a part section taken on line 6 6 of Fig. et.

In all of the views the same letters of reference indicate similar parts.

a is a stationary support for holding the supporting-shaft in position. a is a shaft fixed to the said support by means of a key (L2.

0. is one of the electrical terminals of the generator.

The armature is shown by a" and is surrounded by the coils a. The armature is fixed to the shaft a by means of a feather or key a.

(L is the insulated terminal of the armaturecoils, which passes through the reduced hollow end of the shaft a.

The foregoing-described parts constitute the stationary portion of my magneto-electric generator.

b is a sleeve adapted to revolve freely upon the shaft a. It is disassociated from all other portions of the apparatus. 1) is a drivingpulley, which may be part of the said sleeve or may be separate and fixed thereto.

0, c and c are segmental-shaped per manent field-magnets placed in the manner shown in the soft-iron angle pole-pieces c and constitute the magnetic field of the magnetoelectric generator. Bolts 0 pass through the semicircular holes made in the ends of the respective magnets and through the holes in the pole-pieces c and also through holes in the supporting-spiders 0 and 0 all of which constitute a housing for the armature. It will be noticed that the bolts 0 hold the magnetic pieces in position by their contact with semicircular indentations made in the ends of the said magnets.

e and c are centrifugal weights which have contact with the exteriorsurface of the sleeve b. The weights are held in position by means of flexible supports 0 and 0", Which are joined thereto by screws 0 and c, the remaining ends thereof being fixed to the spider c by screws 0 and 0 I have shown these weights to be adjustable in the modification by means of screws passing through a bell-crank pivoted arm for the purpose of adjusting the tension for increasing or decreasing the pres sure of said weights upon said sleeve. I have also shown another means for holding the weights in contact with the sleeve in Fig. 3,

consisting of closed helical springs c and 0 fixed to projections c from the said weights, and screw-threaded stems and nuts c passing through the said projections on each weight.

In the modification I have shown duplex or compound horseshoe-magnets instead of quadrant-shaped magnets, as shown in the first three figures, to constitute the magnetic field of my generator.

The description of the first three figures, 1, 2, and 8, will apply to the latter figures, 4, 5, and 6, the parts being designated the same, the only difference being that the magnets in the last three figures are horseshoe-shaped instead of segments of a circle, as in the first three figures.

The operation of my device is as follows: WVhen the power is applied to the machine for the purpose of rotating it,there is sufficient friction, due to the pressure between the weights 0 and c and the collar 1), to rotate the field-magnet elements of the generator. At that time there is no centrifugal effect tending to cause the weights 0 and c to fly out and leave their contact with the sleeve. Therefore the friction is greater than it is when the machine has assumed its normal speed. As the speed of the machine increases the centrifugal efiect on the weights 0 and c acting against the springs and 0 will reduce the resultant friction between the said weights and the said sleeve to a point just suflicient to turn the field-magnet at a predetermined number of revolutions. The speed desired may be effected, changed, or altered by adjusting the tension of the springs 0 and 0 which will result in producing suflicient friction to transmit the torque necessary to drive the field at a predetermined speed. By this means the sleeve 1) may be rotated at a variable or constant speed quite independent of the speed at which the fieldmagnet, which is the inductor of my magnetoelectric machine, will be rotated.

One of the great advantages of the construction which I have described is due to the fact that the conducting-wires are not subject to centrifugal effect,and therefore are not so easily deranged and are not so difficult to retain in their normal-position.

In connection with my device the governor performs a very desirable function. When the machine is used with a gas-engine, it may be geared to arrive at its predetermined speed when the gas-engine shaft is revolving at a comparatively low rate of speed, so that the magneto-generator will produce current of 5c irregular power is available for its operation. 5 5

Having described my invention, What I claim as new and useful, and desire to secure by Letters Patent of the United States, is-

1. A magneto-electric generator comprising a stationary shaft, an armature fixed to said shaft, conducting-wires carried by said armature, a field-magnet element adapted to be revolved upon said shaft around said armature, a sleeve adapted to revolve on the said shaft for rotating the said revolving element, a driving-pulley on said sleeve, weights flexibly supported by the said driven element, and adapted to make frictional contact with the said sleeve, and a means for yieldingly holding said weights normally in contact with said sleeve.

2. A magneto-electric generator comprising a stationary shaft,an armature fixed thereto, conducting-wires carried by said armature, a field-magnet comprising a series of circumferentially=arranged,permanent magnets, adapted to be revolved on said shaft around said stationary armature, adriving-pulley on ing witnesses, this 11th day of April, A. D.

JAMES M. WILSON,

Witnesses:

A. W. LANE. JEssIJ ARTHUR.

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