US1471957A

US1471957A - Electric power device

Info

Publication number: US1471957A
Application number: US552785A
Authority: US
Inventors: William C Hahne
Original assignee: Individual
Current assignee: Individual
Priority date: 1922-04-14
Filing date: 1922-04-14
Publication date: 1923-10-23
Anticipated expiration: 1940-10-23

Description

Oct. 23, 1923.- 1,471,957

W. C. HAHNE ELECTRIC POWER DEVICE Filed April 14', 1922 ,4 TTOR/VEYS Patented Oct. 23, 1923.

UNITED STATES WILLIAM C. HAHNE, F ELGIN, ILLINOIS.

ELECTRIC POWER DEVICE.

Application filed April 14, 1922. Serial No. 552,785.

To all whom it may concern:

- Be it known that I, WILLIAM C. HAHNE,

a citizen of theUnited States, and a resident of Elgin, in the county of Kane and State of Illinois, have .invented a new and useful Improvement in Electric Power Devices, of which the following is a full, clear, and exact description.

My invention relates to improvements in electric power devices, andit consists in the combinations, construction and arrange ments herein described and claimed:

An object of my invention is to provide a device of the character described in which a current is generated without any appreciable loss in the power or lighting circuit, in which the device is connected.

A further object of my invention is to provide a device of the character described by use of which a current may be generated on placing the device in series with the ordi nary power or lighting circuit, the current generated being more than enough to offset the slight decrease in voltage in the- 26 powerof lighting circuit due to the resistance of the device itself.

A further object of my invention is to provide a device of the character described for generating an alternating current of a pre- 80 determined voltage from the ordinary type of direct current power or lighting circuit.

Other objectsand advantages will appear in the following specification, and the novel features of the invention will be particularly pointed out in the appended claims.

My invention is illustrated in the accompanying drawings, forming part of this application, in which bodiment of my invention, and V Fig. 2 is a diagrammatic view of a part of the mechanism illustrated in Fig. 1, showing the primary shunt in operation.

In carrying out my invention. I make use ofa base 10f suitable insulating material. A pair of binding posts 2 is provided at one end of the base 1 and electrically connected to feed wires 3 and 4 of a direct current system. A second pair of binding posts 5 is disposed at the opposite end of the base 1 and the posts 5 are electrically connected to wires 6 and 7, uponcwhich the load, such as motors, lamps, etc., is carried.

A transformer having a core 8, a primary winding 9 and a secondary winding 10 is Fig. 1 is a diagrammatic view ofan em-' mounted upon the base 1. The primary winding 9 is electrically connected by means of the wire 11 to the load line 6 at one end and to the feed wire 3 by means of a line 12 at its opposite end. The line 12 has in series therewith a solenoid coil 13, the purpose of which will hereinafter be described.

The feed line 4 is electrically connected to the load line 7 by means of a wire 14. It will be evident from the foregoing description that the current consumed by the load carried across the lines 6 and 7, unless otherwise controlled will pass from the feed wires 3 and 4 through the solenoid 13 and the primary 9 through the load.

A shunt bar 15 of relatively heavy gage metal is shunted across the terminals 16 and 17 of the primary winding 9 through a commutator 18. When the commutator 18 is turned to the position shown in Fig. 1, the bar 15 is shunted across the terminals of the primary winding 9and current passing from the line 3 to the line 6 will take the course of least resistance, i. e., the bar 15. A condenser 19 is shunted across the commutator 18, as shown in Fig. 1.

Means for operating the commutator is provided in an electric motor 20, which is regulated so that the rotor 21 of the commutator 18 will revolve a predetermined number of times a second to produce a predetermined frequency of interruptions of current flowing through the primary winding 9. The motor is connected by means of the wire 22 to the wire 14 on one side of the power or light circuit and by means of the wire 23 through a switch 24 to the opposite side of the power or light circuit.

The switch 24, when closed, as shown in Fig. 1, will cause the motor 20 to operate and when open will serve as a. means for stopping the motor.

A soft iron plunger 25 is disposed within the solenoid coil 13 and normally held in an elevated position by means of a tension spring 26. A bar 27 is carried by the plunger 25 and extends downwardly through the lower opening of the solenoid 13. A contact shoe 28 is carried by the bar 27 and is electricallyconnected by means of a wire 29 to the line 3-line 6 side of the power or light circuit. The shoe 28 is normally out of contact with the uppermost of a series of contact plates 30. A resistance 31 is connected in series with the contact'plates and the lowermost contact plate is electrically connected by means of a wire 32 to the wire 11 on the line 3-line 6 side of the circuit at the opposite end of the primary winding 9.

From the foregoing description of the various parts of the device, the operation thereof may be readily understood. In using my electric power device, I connect the binding posts to the opposite poles or lines 3 and l: of a direct current feed system and I connect the binding post 5 to lines 6 and T upon which the load, such as motors and lamps is carried. I then close the switch 2% and the motor 18 will operate, causing the rotor 21 and the comn'iutator 18 to revolve. lVith each half revolution of the rotor 21, the bar 15 will be shunted across the primary 18 and current will pass from the line 3 to the line 6 as though the primary winding 9 were not connected in the circuit at all. it the opposite halt cycles of the rotor 91, however, the bar 15 is not shunted across the primary winding 9 and current which is flowing through the load must pass through the primary *inding 9, thus building a strong magnetic field thereabout and causing an induced flow of current in the secondary windinglO, which by means of the binding posts 83, is electrically connected to an auxiliary load. hen the rotor 21 has resumed the position shown in Fig. 1, the bar 15 will again be shunted across the primary winding 9 and the field previously built up about the primary winding 9 will collapse and a second induced flow of current will occur in the secondary winding 10, this time in the opposite direction. The current flowing in the secondary winding 10 will therefore be an alternating current. To guard against an excessive flow of current through the primary winding 9 when the load is heavy, I provide an automatically operated shunt resistance represented by the resistance 31, the contact shoe 28, the plunger and the solenoid coil 13. \Vhen the current is relatively heavy, the solenoid coil 13 will. draw the plunger 25 downwardly by the increased energy brought about by the relatively heavy current flow to the load and the shoe 28 will move down to the position shown in Fig. 2 or even to the lowermost cont-act plate, if the current 13 is heavy enough. This will cause the lines 32 and 29 to virtually unite and form a shunt of low resistance across the winding 9 and the current will be divided in its flow through the winding 9 and the shunt thus formed.

I claim:

1. A device of the character described comprising a primary coil adapted to be connected in series with an electric light or power circuit, a secondary coil inductively coupled to said primary coil, a conductor of low resistance means for intermittently shunting said conductor of low resistance across said primary coil, whereby a current is induced in said secondary coil, a second conductor of varying resistance and means to auton'iatically shunting said second conductor of varying resistance across said primary coil as the current in the light or power circuit is increased.

2. A device of the character described comprising a core of iron, a primary coil disposed on said core and adapted to be connected in series with an electric light or power circuit, a secondary coil inductively coupled to said primary coil, a conductor of low resistance means for intermittently shunting said conductor of low resistance across said primary coil, whereby a current is induced in said secondary coil, a second conductor of varying resistance and means for automatically shunting said second conductor of varying resistance across said primary coil as the current in the light or power circuit is increased.

3. A device of the character described comprising a core of iron, a primary coil disposed on said core and adapted to be connect-ed in series with an electric light or power circuit, a secondary coil inductively coupled to said primary coil, a conductor of lower resistance than said primary coil, :1 commutator for intermittently shunting said conductor across the terminals of said primary coil, means for operating said commutator, whereby a current is induced in said secondary coil as said conductor is intermittently shunted across the terminals of said primary coil, a second conductor of varying resistance and means for automatically shunting a second conductor of varying resistance across said primary coil as the current in the light or power circuit is increased.

4. In a device of the character described, a primary coil adapted to he connected in series with a light or power circuit, a conductor of varying resistance and means for automatically shunting said varying resistance across the terminals of said primary coil as the current in said light and power circuit increases, the resistance of said conductor of varying resistance being lowest when the current in said light or power circuit is at its maximum.

WILLIAM C. HAHNE.