US798770A - Governor for dynamos. - Google Patents

Description

PATENTED SEPT. 5, 1905.

C. A. Box. GOVERNOR PoR DYNAMos.

AYPLICTIOH FILED AUG. 12, 1903.

CHARLES A. ECK, OF NEWARK, NEV JERSEY.

GOVERNOR FOR DYNAMOS.

Specification of Letters Patent.

Patented Sept. 5, 1905.

Application filed August 12, 1903. Serial No. 169,172.

To (all whom it muy concern:

Be it known that I, CHARLES A. Een, a citizen of the United States of America, and a resident of Newark, county of Essex, and State of New Jersey, have invented certain new and useful Improvements in Governors for Dynamos, of which the following is a specification.

My invention relates generally to dynamos, and has more particular reference to a governor adapted to respond to fluctuations in voltage of the said dynamo.

My invention contemplates a governor whose action depends upon the iiuctuations of voltage of the dynamo, so that when the voltage increases above a certain point the governor will act to lessen the speed of the said dynamo and when the voltage decreases below a certain point the governor will act to increase the speed again. The voltage and the speed of the dynamo thus reciprocate and tend to render both the voltage and speed constant.

'ln carrying out this invention I construct my dynamo with a magnetic field and -with a rotatable armature-shaft carrying an armature and a commutator mounted Within the said field so as to move longitudinally. The

dynamo will be suitably driven by any means found useful for the purpose, but will conveniently receive its motion from the iiywheel of an internal combustion motor through the instrumentality of a friction-pulley moving with the armature-shaft. Means are provided for positively moving the said armature-shaft out of its central longitudinal position and the friction-pulley into contact with the fiy-wheelaforesaid. When the voltage increases above a certain point, the magnetic field will act upon the armature-shaft so as to move the same into its central longi- 'tudinal position and so as to withdraw the friction-pulley from the wheel above mentioned. It will be understood that this movement is a very slight one and that by making the voltage of the dynamo variable it becomes for all practical purposes constant;that is to say, the variation in voltage is so slight as to hardly be noticeable.

rlhe invention may of course be varied widely in its embodiment so long as the abovestated principles are maintained; but for the purpose of description I have in the accompanying drawings shown my invention in several suitable forms, to which, however, 1 do not wish to be understood as limiting myself,

although the said particular structures embody in themselves valuable features of construction.

ln the said drawings, Eigurcl represents a vertical sectional view through a dynamo mounted adjacent to the fiy-wheel or other wheel of an internal-combustion motor. Fig. 2 is a diagrammatic view showing the circuit of the dynamo.

l indicates a dynamo mounted in this instance at an angle tothe iiy-wheel or other wheel 2 of an internal-combustion motor, the sparking device of which the said dynamo is adapted to supply with the electricity. The said dynamo is provided with a magnetic field comprising the casing 3, having the fieldcoils l and the pole-pieces 5. Mounted within the said field is the rotatable armature-shaft 6, carrying the armature 7 and the commutator 8. This armature-shaft is so mounted as to be capable of a longitudinal movement within the said field. Connected with the said armature-shaft is a friction-pulley 9, in this instance beveled and being attached to the said shaft by means of a nut l1. Vithin the armature-shaft is a spring 12, which tends normally to move the said shaft out of its central longitudinal position and to move the said friction -pulley against the fly wheel. The tension of this spring may be adjusted by means of the threaded spindle l0.

The spring 12 in normally tending to keep the friction-pulley up against the iiy-wheel will normally increase the speed of the dynamo, the field being self-exciting, thereby raising the voltage of the same up to a certain point, when the said field becomes strong enough to overcome the tension of the spring and to move the said armature-shaft into its -central longitudinal position and the frictionpulley away from the fly-wheel. This has the effect of lessening the speed of the dynamo, thereby decreasing its voltage, so that the spring again will move the said frictionpulley toward the wheel and the armatureshaft out of its central longitudinal position, thereby increasing the voltage again.

In Eig. 2 is shown a diagram of the electrical circuit of the dynamo. The dynamo is shunt-wound, the field-coils i being connected to the brushes 20, to which latter also lead the line-wires 2l. v

Having thus described my invention, what I claim is- 1. The combination with a driving-wheel, and a dynamo, one of which is mounted at an IOO IOS

angle to the other, of a magnetic field in said dynamo, a beveled friction-pulley adapted to engage with said driving-wheel, a rotatable armatureeshaft, carrying said pulley and carrying an armature and a commutator, mounted to move longitudinally within said field, and adapted to be moved into its central longitudinal position by the action of the said field when the voltage increases above a certain point, thereby decreasing the speed of the armatureshaft, and means for automatically moving the said shaft out of' its central longitudinal position when the voltage drops below a certain point thereby increasing the speed of the armature-shaft.

2. The combination with a driving-wheel, and a dynamo mounted atan angle to the driving-wheel, of' a magnetic field in said dynamo, a beveled friction-pulley adapted to engage with said driving-wheel, a rotatable armature-shaft, carrying said pulley and carrying an armature and a commutator, mounted to move longitudinally within said field, and adapted to be moved into its central longitudinal position by the action of' the said field when the voltage increases above a certain point, thereby decreasing the speed of' the armature-shaft, and means for automatically moving' the said shaft out ofl its central longitudinal position when the voltage drops below a certain point thereby increasing the speed of' the armature-shaft.

3. The combination with a driving-wheel, and a dynamo, one of which is mounted at an angle to the other, of' a self-exciting magnetic field in said dynamo, a beveled friction-pulley adapted to engage with said driving-wheel, a rotatable armature-shaft, carrying said pulley and carrying an armature and a commutator, mounted to move longitudinally within said field, and adapted to be moved into its central longitudinal position by the action of the said field when the voltage increases above a certain point, thereby decreasing the speed of' the armature-shaft, and means for automatically moving the said shaft out of' its central longitudinal position when the voltage drops below a certain point thereby increasing the speed of the armature-shaft.

4. The combination with a driving-wheel, and a dynamo mounted at an angle to the driving-wheel, of' a self-exciting magnetic field in said dynamo, a beveled friction-pulley adaptp Signed at Newark, New Jersey, this 6th day of' August, 1903.

CHARLES A. ECK. Witnesses:

JOHN lV. JonALEMoN, FREDERICK R. LA'r'rUs.

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