US855450A - Potential-regulator. - Google Patents

Description

No. 855.450. PATENTED JUNE 4, 1907.

J. H. DUNCAN.

POTENTIAL REGULATOR.

APPLICATION FILED MAR.22,1906.

WIT/VESSES l/v'l/E/VTOR UNITED srarns PATENT OFFICE.

JAMES H. DUNCAN, or ST. ouis, Missouri, assic-uon or ONE-HALF TO JAuEs W. KA'Y'E, or ST. Louis, MISSOURI.

POTENTIAL-REGULATOR.

To all whom it may concern.-

ings, forming part of this specification.

My invention relates more particularly to an automatic mechanism for maintaining substantially constant pressure in a circuit supplied with current by a dynamo electric generator, or other similar source of electric current.

Referring to the drawings which show one form in which my invention may be enibodied, Figure 1 is a side'elevation of the device, the casing in which it is contained being represented in section; and Fig. 2 is a diagrammatic view of the electrical connections.

is the casing which may be filled with anysuita'ble insulating fluid and is provided with a lid or plate 11 of insulating material:

'12 is a coil of wire wound upon a magnetic core 13 and the whole supported on end pieces 14 attached to a conducting plate 15.

The plate 15 is secured to the lid 11 by means of a screw 17, and also by means of a screw 18, which latter is provided with a pillar 19 and acts as a binding screw for one of the terminals of the device. 21 are additional binding screws also provided with pillars 22, for attaching the various conductors to the device as hereinafter described. The end pieces 14 are provided with brackets 24 suitably secured thereto and each having a set screw 25 and 26. These end pieces also carry contact plates 27 and 28. opposite the set screws 26 and 25 respectively. Between the inner ends of the screws 25 and 26 and armature 31 is connected a relatively weak coil spring 34, the opposite end of which is fastened to the lowerend of a set screw 35 in the lid 11. In similar manner a relatively Specification of Letters Patent.

Application filed March 22,1906. Serial No. 307,325.

Patented June 4, 1907.

stronger spring 36 is connected to the arm 33 of the armature 3v and the opposite. end. of this spring is carried by another set screw 35.

'Both of the set screws 35 are made adjustable in the lid 11 by means of adjusting collars 3S and lock nuts 39.

In Fig. 2, 40 indicates the field poles of an electric generator and 41 its armature. From the brushes 42 of this armatureextends the armature circuit 43.. a'lhis circuit is connectedtwit-h the coil 12 of the magnet at both ends of said coil. From one end of'the coil 12 extends the conductor 45, between which and the conductor 46 are connected in multiple lamps 47, or other translating devices. One end of the wire 46 is connected with the contact 27. The field coil of the generator is composed of a conductor 49 extending from one of the brushes 42 around the field poles 40 and thence to the set screw 25, thus placing the held of the motor in series with the motor armature, the circuit being through the magnet armature 30 connected with the armaturegcircuit 43 by means of a conductor 50. 51 is a conductor connecting one end of the magnet armature 31 with the circuit 43. The opposite end of the magnet armature 31 is normally in contact with the inner end of the set screw 26, the oppo site end of which screw is connected by a conductor 52 with one side of abattery 53, the opposite side of which is connected by a conductor 54 with the conductor 46.

In the operation of my device when the parts are in the position shown in the drawings and the armature 41 is stationary, cur rent will pass from the battery 53 through the conductors 54 and 46, lamps 47, conductors 45 and 43, to the right hand. brush 42 of the armature 41, thence out. of the 1011 hand brush 42 of the armature along the conductors 4.3 and 51, magnet armature 31, set screw 26 and conductor 52, hack to the opposite side of the battery 53. A portion of the current when it. reaches the coil 12 will also passthrough said coil and by means ol the conductors 43 and 51, magnet armature 31, set screw 26 and conductor 52 alsobaek to the opposite side of the battery. ll now the general or armature is rotated a current will be generated. therein owing to the fact that the circuit through the held is closed by.

completed right hand brush 42 and forming the field coil of the motor, the opposite end of said conductor 49 being attached to the set screw 25 connected with the magnet armature 30, and by means of the conductor with the opposite brush 42 of the armature through the conductor 43. The current passed through the coil 12 from the battery is of insullicient strength to operate. the magnet. armature 31 against the tension of the weaker spring 34, but as soon as the armature begins to rotate a current is passed from itthrough the coil 12 by means of the circuit or conductor 43 connecting the brushes of the armature to the opposite ends of said coil, this current is of sufficient strength to attract the magnet armature 31 into contact with the plate 27, and the current passing from the armature through the conductor 43 divides the greater part passing through the conductor 51, magnet armature 31, contact 27, conductor 46, lamps 47, conductor 45, to the right hand end of coil 12 and thence by the conductor 43 back to the generator armature. The movement of the magnet armature 31 to the contact 27 breaks its connection with the set screw 26, thus cutting the battery 53 out of the circuit as soon as the potential of the current from the generator armature becomes strong enough to attract the armature 31. In case upon an increase in speed or for other cause, the potential of the current through the circuit 43, and, consequently, through the circu'it formed by the conductors 45 and 46" containing the translating devices 47 rises and becomes too great, the core 13 of the electro-magnet will attract to it the magnet armature 30,. thus breaking the circuit through the conductor 49 constituting the field coil of the generator and causing a reduction in the potential of the current through the translating devices 47 and the doil 12. The spring 36 being stronger than the spring 34 will not operate until the potential of the current from the generator has increased over the potential sufficient to operate the magnet armature 31 against the tension of the weaker spring 34.

In1mediately upon the lowering of the potential through the coil 12 by the breaking of the field circuit of the generator, the spring 36, returns the magnet armature 30 to its con-" tact with the set screw 25, thus again closing the circuit through the generator field coil. Should the rotation of the generator armature 41 be discontinued, the spring 34 will draw the magnet armature 31 away from the contact 27 and against the set screw 26, thus again closing the circuit from the battery 53 to the translating devices 47 and preserving a practically constant potential on the circuit.

Having fully described my invention, What I claim as new and desire to secure by Letters Patent of the United States, is- I 1. The combination with a generator armature, of a lield circuit therefor, an armature circuit, a translating device adapted. to be connected to said armature, a second source for supplying current to said translating device, and means controlled by the current in said armature circuit for governing the current in said field circuit and from said second source.

2. The combination with a generator armature, of a field circuit tl'ierefor, an arma ture circuit, a translating device adapted to be connected with said armature, a second source for supplying current to said translating device, means controlled by the current in said armature circuit for governing the current in said field circuit, and means also controlled by the current in said armature circuit for controlling the flow of current from said second source.

3. The combination with a generator armature, of a field in series circuit therewith, an armature circuit, translating devices adapted to be connected with said armature circuit, a second source for supplying current to said translating devices, and means controlled by the current in said armature circuit for governing the current in said field circuit and for governing the-flow of current to said translating devices from said armature ,and fromsaid second source.

4. The combination with a generator armature, of a field circuit therefor, an armature circuit, translating devices adapted to be connected to said armature, a governing device for the current in said field, a second source for supplying current to said translating devices, a governing device for simultaneously controlling the currents from said second source and armature, and means governed by the current in said armature circuit for actuating said governing devices.

5. The combination with a generator armature, of a field circuit therefor, an armature circuit, a translating device adapted to be connected with said armature, means actuated by a current of lower potential in said armature circuit for governing the supply of current to said translating devices, and means actuated by a current of higher potential in said armature circuit for governing the current in said field circuit.

6. The combination with a generator armature, ofa field circuit therefor, an arma' ture circuit, a translating device adapted to be connected with said armature,, a second source for supplying current to said translat ing device, means actuated by one current in said armature circuit for governing the supply of current from said armature and second source to said translating devices, and means actuated by another current in said arma- ICC ture circuit for governing the current in said ture. circuit. a translating device adapted to be energized from said armature circuit, a second? source for supplying current to said translating device, an electro-niagnet ener- 1 gized from said armature circuit, means controlled by said magnet for governing the current in said lield circuit, and means also con- 5 trolled by said magnet for governing the current in said armature circuit and from said second source. 8. The combination with a generator armature, of a field circuit therefor, an armature circuit of varying potential, a translating device adapted to be energized from said 5 armature circuit, a second source supplying Q ,Inagnet energized from said armature circuit,

means controlled by said magnet and re-' current to said translating device, an electrosponsive to a given potential in said annature circuit for governing the current in said lield circuit, and separate means also controlled by said magnet and responsive to a The combination with a generator armature, of a held current therel'or, an arma- 1 l lower potential in said armature circuit for governing the current in said armature circuit and from said second source.

l). The eonibinatiol'i with a generator ar- 1 mature. ol' a lield circuit therelor. an ariuae ture circuit of varying potential. :1 translating device adapted to be energized from said z'u'niature circuit, a second source supplying current to said ranslatingdevicej an electroi magnet energized from said armature circuit, means controlled by said electro-magnetand l only responsive to a given potential of" said said field circuit, and separate means also controlled by said magnet and responsive to a lower potential in said armature circuit for simultaneously governing the current. in said armature circuit and from said second source.

In testimony whereof. I have hereunto set my hand and allixed in seal in the presence of the two subscribing witnesses.

JAMES H. DUNCAN. [1,. s.]-

- Witnesses:

James II. BRYSON, BENNET'IE PlKE.

armature circuit for governing the current in

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