US1169465A - Electric regulation. - Google Patents

Description

J. L. CREVELING.

ELECTRIC REGULATION.

APPLICATION HLEDA nsc.29,1910.,

Patnted Jan. 25,v 1916.

WITNESSES INVENTOI? THE COLUMBIA PLANOGRAPH c0., WASHINGTON, n. c.

UNITED sTATEs PATENT ora ion.

JOHN L. CREVELI NG,. OF NEW YORK, N. Y., ASSIGNOR TO SAFETY CAR. HEATING AND LIGHTING COMPANY, A CORPORATION OF NEW JERSEY.

ELECTRIC REGULATION.

Specification of Letters Patent. i Patented Ja11.25, 1916.

. Application filed December 29, 1910. Serial No. 599,872.

.To all whom it may concern Be it known that 1, JOHN L. CREVELING, a resident of the city, county, and State of New York, have invented certain new and useful Improvements in Electric Regulation, as set forth inthe annexed specification and drawing forming a part thereof.

My invention pertains to that class of electric regulation wherein it is desired to automatically govern a generator in a predetermined manner. j

As myinvention is particularly applicable to those systems wherein a generator, driven at variable speed isused to charge a storage battery and operate lamps or other translatingdevices, it .will be described with reference to such a system.

Figure l is a diagrammatic representation of one type of such system embodying the essentials of my invention. Fig. 2 is a modified form of system embodying the essentials of'my invention.

In the drawing 1 represents-a. dynamo or generator PI'OVlClEdiWlth the usual field coil 2, having in series therewith a field controlling element 3,-in this instance indicated as a rheostat of the carbon pile variety.

From the dyanmo 1, the ositive lead 4 is carried to the positive si e of the storage battery 5 and lamps or translating devices 6, both of which have their negative termi- 4 nals carried to the negative lead 7 of the which will hereinafter more plainly appear.

Pivoted lever 10, controlling the element 3 is normally drawnin an upward direction as by ad ustable spr ng 11in such manner as to tend to decrease the resistance of the 1 carbon pile3 and increase the voltage of the generator. 'lhelever 10 is provided at one extremity with the core of magnetic material l 12 surrounded, by the solenoid 13 which,

when energized, tends to pull the core 12 downwardly and lncrease the reslstance 3 to lower the voltage upon the generator.

In Fig. 1 the solenoid, 13 is'shown as hav-f ing in series therewith a resistance liwhich may be either fixed or adjustable as desired 3- the voltage of the generator.

and the said coil 13 is placed in shunt across that portion of the system, the voltage upon which it is desiredto usei'or the regulating factor of the generator. In this instance the said solenoid is shown as in shunt'across the generator main circuit. 15 is acarbon pile or other suitable variable resistance in spring 17 against the. adjustable contact screw or stop 18. The lever 16 is provided at its end with a core, 19, of magnetic material, surrounded by the solenoid 8 in such manner that energization of the said solenoid tends to lift the core 19 against the ac tion of spring 17 and compress the carbon pile 15 and reduce the resistance thereof in such manner as to increase the current in the coil 13.

In Fig. 2, the solenoid 13 is connected across that portion of the system with respect to which it is desired to govern the generator voltage and as shown, is connected across the main circuit and having in series therewith the variable resistance 20,; indicated as of the carbon pile variety. The resistance 20 is varied in the same manner as,

the resistance 15 in. Fig. 1, upon energization of the solenoid 9.

A practical operation of my improved system is substantially as follows :In the system shown in Fig. 1 if the generator be running at such speed as to be capable ofv charging the storage battery and operating the lamps or translating devices, current will flow through the field 2 and the generator voltage may beregulated in a well known manner by proper variation of resistance 3. The current flowing through the lead 1 to the storage battery will pass through the solenoid 8 and tend to lift the same against the action of spring 17. Cur rent will also flow through resistance 14: and solenoid 13 and tend to depress the lever 10 against the-action of spring 11 in such manner as to increasethe resistance 3 and lower I so adjust the spring 11 that whenthe resistance 15 i be chosen to have the same when the lever 16 is held against the stop 18, that any fur ther increase in voltage acrossthecircnitin shunt to which the solenoid 13 is placed, will cause the same to draw the core 12 downwardly and prevent the generator voltage increasing above this point. I now so adjust the spring 17 that whenthe desired maximum current flowing to the storage battery through the coil 8 is reached, any increase above this amount will raise the lever 16 in such manner as to decrease the resistance 15, and thus, decrease the total resistance in series with thewinding 1'3 and increase the strength thereof for a given voltage across the circuit to which it is placed in shuntand therefore the voltage which the coil 13 will tend to-hold constant across the circuit in shunt to which it is placed, will be variedin accordance with thefcurrent in the coil 8. In the system as shown in F 2 I so adjust the spring 11 and the screw 18 that when the lever 16 is held upon the screw 18 andthe desired voltage is reached across that portion of the cir cuit-in-shuntto which the coi'lf13is placed, any further increase in voltage will cause thecore l2to be drawn downwardly in such manner as-toincrease the resistance 3 and tend to prevent the generator voltage rising above that point. I now so'adjust the spring lTthat when themaximum current desired, as: the output forthe generator is reached, any increasein this current flowing in the solenoid 9 will raise thelever 16 so as-to decrease the resistance 20 in series with the coil 13 and so strengthen the same that it will tend to hold the lower voltage constant across that portion of the circuit to which it is placed in shunt.

From the foregoing, it will be obvious that I have produced means forregulating a generator, to hold its voltage constant throughout speed changes or other tendencies to cause variations in generator voltage and have provided means whereby the voltage to be held constant through these speed changes is modified in accordance with the current delivered in a circuit in the systom.

1 do not wish in any way to limit myself to the exact details of construction and operation above set forth as a merediagrammatic representation of oneform of employment of my invention, as wide departure may be made within the scope of said invention and as is set forth in the following claims 1. Means for regulating a generator comprehending a' compressible regulating element; voltage responsive means for controlling the same; and means, including a compressible resistance, for varying the current in the said voltage responsive meansdependprehending a regulating element; voltage responsive means for actuating the same; a compressible regulating element for aflecting the current 1n said voltage responsive -means, and means for controlling the same responsive to current fluctuations beyond a vpredetermined limit only. I

3. Means for regulating a generator comarehendin a regulator therefor com irisin b o 7 b compressible means and electro-responsive means tending to hold the generator voltage constant; combined with means for modifying the current in said regulating means depending upon the current beyond a predetermined value only flowing in a circuit supplied'by said generator.

4;. The combination with a generator and a supply circuit, of a regulator for the generator responsive to voltage fluctuations across the supply circuit, and a controllerincluding a series coil for varying the action of the regulator by. current above-a predetermined limit supplied by said generator.

5. -Means for regulating a generator comprehending a voltage regulator operable above a predetermined generator output, means for electrically varying the adjustment of said voltage regulator, and current operated .means governing said last mentionedmeans and being inoperative below a certain predetermined current.

(5. The combination with a source of variable electro-motive force and a circuit supplied thereby, ofmeans for controlling said electro-motive force in response to voltage fluctuations, and means for adjusting the current in the voltage responsive means including a coil affected by current fluctuations in said circuit above a predetermined value only.

7. The combination with a source of electro-motive force tendingto vary; voltage operated means for holding said electromotive force substantially constant throughout tendencies to vary; and means affecting current responsive means for determining the value of electro-motive force to be held constant and affected only by current fluctuations beyond a predetermined value.

8. T he combination with a generator driven at variable speeds; a coil and variable resistance fol-holding the voltage thereof substantially constant throughout speed changes of resistance varying means for adjusting the standard voltage to be held constant at such values as to prevent the current supplied by the generator exceeding a pre determinedlimit.

9. The combination with a generator driven-at variable speeds; a supply circuit; a coil operated variable-resistance for regulating the generator to hold the voltage exceeding a predetermined value, and said across the supply circuit constant throughad usting means being inoperative when the out speed changes; of a coil operated var1 current in said circuit is below this value.

able resistance for adjusting the voltage to JOHN L. CREVELING. be held constant across the supply circuit, Witnesses:

whereby the current in said circuit, due to CHAS. MoG. CHAPMAN,

the voltage held constant, is prevented from ANITA E. Tums.

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

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