US999245A - Feeder-regulating transformer. - Google Patents

Description

G. S. NEBLEY.

FEEDER BBGULATING TRANSFORMER;

APPLICATION TILED AUG. 27, 1909.

Patented Aug. 1, 1911.

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UNITED STATES PATENT OFFICE.

GEORGE SPENCER NEELEY, OF ST. LOUIS, MISSOURI.

FEEDER-REGULATING TRANSFORMER.

To all whom it may concern:

Be it known that I, GEORGE SPENCER NEELEY, a citizen of the United States, re siding at St. Louis, Missouri, have invented a certain new and useful Improvement in Feeder-Regulating Transformers, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appert-ains to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is a diagrammatic View of a system of distribution in which is located a transformer embodying my invention, with the contact arm on the first contact point of the secondary coil. Fig. 2 is a diagrammatic view similar to Fig. 1 and with the contact arm shown in position between the first and second points of the secondary coil.

My invention relates to a feeder regulating transformer, the principal object of my invention being to eliminate the core losses of the transformer during the hours that the services of the transformer are not needed.

Owing to the great danger arising from the opening of the primary circuit of many classes of transformers, (the cause of which is well known to those versed in the art), while any portion of the secondary winding is in circuit with the system of distribution the customary practice is to connect up the terminals of the primary winding solidly across the supply mains without fuses or switches, and which practice of using fuses or switches is customary with all other classes of multiple distributing transformers.

My invention consists in a novel means for automatically and positively opening the primary circuit of such transformers, as soon as the secondary winding is cut out of circuit with the distributing system, thus stopping all core loss at that instant; then automatically and positively reconnecting the primary circuit of the trans former before the first section of the secondary winding has been thrown into circuit with the distributing system.

My invention has a twofold advantage; the paramount one being the great saving on core losses and the second one is, by reason of the transformer primary being cut out of the circuit for the greater portion of Specification of Letters Patent.

Application filed August 27, 1909.

Patented Aug. 1, 1911.

Serial No. 514,938.

the twenty four hours, the temperature of 3 and 4 are sub-feeders whose E. M. F.

is to be increased or diminished by the regulating transformer 5.

A, B, C, D and E are the usual terminals brought out from the secondary winding 6 at suitable intervals, and are usually mounted in a circle so that they may be traversed by the free end of the movable arm 7.

8 is the primary winding of the transformer, one end of which is connected rigidly to the sub-feeder 4. The other end of the primary winding is connected rigidly to the stationary terminal 9.

10, is a spring switch connecting rigidly at one end to the first terminal of the series at, A, this connects the other end of the primary winding, 8, with the other side of the line, 8, thus completing the primary circuit of the transformer across the lines 3, and 4.

Carried by the free end of the movable arm 7, is an insulated projection 11, the length of which is sufficient to cause the spring 10 to break contact. with the terminal 9, when the free end of the movable arm 7 is resting on the first terminal of the secondary winding at A. Thus it will be readily seen that as soon as the free end of the movable arm 7, is rotated toward the terminal B, the spring switch 10, closes the primary circuit of the transformer, by making contact with the terminal 9.

From the foregoing it will be readily seen by those skilled in the art and conversant with the practice of using such transformers, that the dangers arising from the opening of the primary circuit of such transformers, while any portion of the secondary circuit is yet active, is an absolute impossibility where my device is in use and further the primary circuit is positively closed automatically before any portion of the secondary winding becomes effective.

Having thus described my invention, what I claim is:

1. A regulating transformer having in combination a primary and a secondary winding, a series of contacts brought out from different sections of said secondary winding, the first contact of the series being non-active a movable lever for engaging said contacts and means connected to the lever whereby the primary circuit of the transformer is broken when the said movable element stands on the first or non-active contact of the said series and is reconnected before the said movable element reaches the second, or first active, contact of said series; substantially as described.

2. In combination, mains, two inductively "related windings, one adapted to be connected across the mains, and the other in series wit-l1 one of the mains, and a single lever adapted to simultaneously break the connection of the first winding and throw out the second winding.

3. In combination, mains, two inductively related windings, one adapted to be connected across the mains, and the other in series with one of the mains, and a single lever adapted to throw in circuit the first winding and afterward throw in a section of the second winding.

4. In combination, mains, a primary winding adapted to be connected across the mains,

a switch in circuit therewith, a secondary winding connected to the primary winding, and divided into sections, contacts connected with each section adapted to be engaged by a lever, said lever, and means on the lever for operating the switch.

5. A regulating transformer having in combination a primary and a secondary winding, a series of contacts brought out from different sections of said secondary winding, the first contact of the series being non-active, a movable lever for engaging said contacts, a switch in the primary circuit of the transformer and means connected to said lever adapted to operate said switch, so as to break said circuit when the said movable lever stands on the first or non-active contact of the said series, and to reconnect the circuit before the said movable lever reaches the second or first active contact of said series.

In testimony whereof I hereunto ailix my signature in the presence of two witnesses, this th day of August, 1909.

GEORGE SPENCER NEELEY.

WVitnesses M. P. SMITH, LENORE CLARK.

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

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