US396269A - Gesellschaft fur elektrisciies liciit unt - Google Patents

Description

(No Model.)

C. GOERPER.

ELBGTRO DYNAMIC MAGHINE,

No. 396,269. Patented Jan. 15, 1889.

A TTORNEYS WITNESSES:

,ties are experienced in starting or UNITED STATES CARL COERPER, OF COLOGNE, PRUSS PATENT (IEEicE,

IA, ASSIGXOR TO THE HELIOS ACTIEN- EHRENFELD, GERMANY.

ELECTRO-DYNAMIC MACHlNE.

SPECIFICATION forming part of Letters Patent No. 396,269, dated January 15, 1889.

Application filed February 15, 1888! Serial No. 264,077-

To all whom it may concern.-

Be it known that I, CARL COERPER, a subject of the King of Prussia, Emperor of Germany, residing at the city of Cologne, in the Kingdom of Prussia, German Empire, have invented certain new and useful Improvements in Dynamo-Machines, (for which Letters Patent heretofore were granted to me by the governments of Belgium, dated January 12, 1888, No. 80,249; England, dated January 14, 1888, No. 633; France, dated February 4, 1888, No. 188,555, and Italy, dated March 27, 1888, Vol. XXI, No. 22,992, and YoLXLIQNo. 297,) of which the following is a specifieation.

In transmitting power by electricity greater or less difficulty is experienced in starting the machines, especially in such cases where the power is to be transmitted from high-speed dynamo-machines to shafts rotated at low speed or at varying speedsas, for example, in starting and running street-cars, &c.

The object of my invention is to furnish an A improved construction of dynamo-machine which is especially adapted for transmitting motion and power, and in which no difficulstopping the car or other body to be driven; and the invention consists in a dynamo-machine in which one of the elementseither the fieldmagnets or the armature-is rigidly mounted on the shaft to be driven, while the other element is loosely mounted on the shaft and checked or entirely stopped by means of a brake or other suitable checking device. IVhen the current is conducted into the dynamo, the field-magnets and armature will have a tendency to rotate in opposite direction to each other; but when one element is fixed on the shaft while the other element is loose the latter will rotate alone. hen the speed of rotation of the loosely-mounted element is decreased by means of the brake, it will have a tendency to impart motion to the element fixed on the shaft and thereby turn the shaft. The motion imparted thereby to one element is increased when the brake is applied more firmly to the element which is mounted loosely 011 the axle until the latter is (No model.) Patented in Belgium January 12, 1888, No. 80,249; in England January 14, 1888, No. 633; in France February 4,

1888 No.188 555 and in Ital March 27, 1888, XXI, 22,992,

1 r J Y held in rigid position by means of the brake, while the other element will have reached the maximum speed of rotation corresponding to the current. For example, in a street-car in which one element is mounted on one of the axles and the other is loose on the axle, the loose element will have its maximum speed of rotation when the car is at a standstill, and as the brake is applied to said loose element the lixed element on the axle begins to turn slowly and the ear is propelled forward slowly, while as the power of the brake is increased the speed of the ear increases. 'lhus variations in the speed of the car can be obtained withoutrequiring any change in the strength of the current.

The field-magnet and armature can also both be looselymounted on the shaft or axle, and are then provided with brake orcheck devices, either on the axle or imlependent of the axle, so that their motion can be controlled. In case one of the elements is mounted directly upon the axle carrying the driving-wheels it is advisable to provide intermediate elastie or cushioned members to avoid jars or jolts. To reverse the direction of the motion of the elements, all. that is necessary is to change ihedireclion of the current to the armature. As both elements of the dynamo are in motion, but in an opposite direction to each other, the number of rotations of the dynamo can be reduced nearly oue half. It is therei'ijn'e possible to use comparat-ivcly small dynamos with high effect for driving shafts that do not need high speeds of rotation-such as,t'or instance, the axles of street-cars.

My improved dynamo can also be used with great success where dynamos are driven by shafts having varying speeds of rotation as, for example, in lighting railway-trains by electricity, as in such cases the dynamo is driven from one of the axles of the cur.

\Vith my improved construction the electric potential can bemaintained uniformly at different speeds, one of the elements being controlled in regard to its speed of rotation by a brake; or, it both the field-magnets and armature are loosely mounted on the axle, said elements can be controlled in. their speed of rotation by the brake devices.

My improved system can be used with nearly all constructions of dynamos, but is especially adapted to those types in which both the field-magnets and the armature are of ring shape. \Vhen both elements are of this shape and synnnetrically arranged, considerable Variations in the speed of rotation and power can be obtained by a proper adjustment of the brushes both in the fieldmagnets and the armature.

In the accompanying drawings, Figure 1 is a side View of a dynamo-machine mounted on the axle in the manner described, showing the brake in side View and the axle in section. Fig. 2 is a horizontal sectional View of the parts shown in Fig. 1.

Similar letters of reference indicate corresponding parts.

a represents the axle; b, the field-magnet; c, the armature having a hub, (I, with a bearing-sleeve, e, mounted loosely on the axle.

f represents the adjustable shoes of a fixed brake, f, by means of which the armature can be controlled in the manner described.

In case the armature is fixed and the fieldmagnets are mounted loosely on the axle,

to rotate with the field-magnets.

Having thus described my invention, I claim as new and desire to secure by Letters Patent-- 1. The combination, in a dynamo-machine for the electrical transmission of power, of a shaft or axle, an armature and field magnets on said shaft or axle, one of the elements of the dynamo-machine, either the armature or field-magnets, being loosely mounted on the shaft or axle, and a brake or other cheek mechanism applied to the loosely-mounted element and capable of locking the same in a position of rest, substantially as set forth.

2. In a dynamo-machine for the electrical transmission of power, the combination, with a shaft or axle, of a field-magnet mounted rigidly on said shaft or axle, an armature ap plied loosely on the shaft or axle, and a brake or other cheek mechanism applied to the armature and capable of locking the same in a position of rest, substantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CARL COERPER.

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