US1601204A - System of power supply - Google Patents

Description

Sept. .28 1926.

o. s. FIELD SYSTEM OF POWER SUPPLY Filed March 19, 1925 INVENTOR BY Q SXM ATTORNEY Patented Sept. 28, 1926. l i

UNITED STATES PATENT OFFICE.

OSCAR S. FIELD, OF ROSELLE, NEW JERSEY, ASSIGNOR, BY MESNE ASSIGNMENTS, TO

THE UNION SWITCH dc SIGNAL COMPANY, OF SWISSVALE, PENNSYLVANA, A GOR- POBATION OF PENNSYLVANIA.

SYSTEM OF POWER SUPPLY.

Application filed March 19, 1925. Serial No. 16,868.

My invention relates in general to systems of power supply and more particularly to a system where energy applied to the primary winding of an electro-magnetic device supplies power from a secondary winding on said device through a contact controlled by the primary winding.

One object of my invention is to provide an improved, simple and automatic method or means for closing a secondary load circuit by energizing a primary supply circuit. A further object is to provide an automatic means for transferring the load from the said secondary winding to an auxiliary source of supply upon the de-energizat-ion of the primary winding. Other objects and advantages will appear. from the description which follows.

In various electrical systems it is neces sary to maintain a load circuit closed in practical continuity, regardless of the condi tion of the normal or primary energy supply. Heretofore, manual means have been employed to make available the primary energy supply, or the auxiliary supply when the primary supply failed. Where automatic action was desired, recourse was had to auxiliary appartus such as relays etc. to accomplish this object. In the present invention an eificient transformer and an automatic and effective circuit closing device is combined in one piece of apparatus making for economy and for efliciency of service.

One type of apparatus embodying my invention is shown in the accompanying drawing in which Fig. 1 is an elevation of the device with. cover removed to show the operating elements.

Fig. 2 is a side view, partly in section, of Fig. 1, and

Fig. 3 is a circuit diagram showing the electrical connections.

Referring now to the drawing, there is disclosed a transformer relay structure having a laminated magnetic core portion 2 fastened firmly to the supporting case 1 and a movable yoke or armature portion 3 flexibly supported by the strap 4 which is made fast to case 1. On the core 2 are supported in any suitable manner the primary winding 5 and the secondary Winding 6.

The yoke 3 has grooves-7 and 8 into which are fastened short-circuited rings or shading bands 9 and 10 of any suitable non-magnetic material having relatively high conductivity. The shading bands 9 and 10 are purposely made to extend above the face of the yoke maintaining an airgap when the structure is energized and insuring desirable releasing action. The bands 9 and 10 are spaced on the yoke in such a way that they rest on about the middle of the outer pole faces of core 2 with yoke picked up, thus causing a portion of the pole flux to include the band associated therewith and eliminating undesirable chatter and vibration in a way which is well known to those versed in alternating current phenomena.

Supported in any suitable way to the case 1 is a terminal block 11 of insulating material to which are connected the taps of the secondary winding 6. Fixed to the yoke 3 and insulated therefrom are contact fingers 12 and '13 which make contact with the left hand pair of contact posts, one of which is shown at 14, when the structure is energized, and with the right hand pair of contact posts, one of which can be seen at 15, when the structure is de-energized. The fingers 12 and 13, cooperating with posts 15 serve as a stop for the armature or yoke in the de-energized position.

F astened to the case 1 is a terminal panel 16 of insulating material in which are located the following terminal posts: 17 to which'is connected the primary winding 5 and to which is applied the alternating current supply; posts 18 to which are fixed the contact blocks 14; posts 19 to which are fastened the contact blocks 15 and to which is connected the auxiliary energy supply when used; and posts 20 to which the load is applied and which are connected to the fingers 12 and 13 by means of connectors 21.

The operation of the device is as follows:

With alternating current energy applied to winding 5 there is set up a flux in the core 2 which causes the yolie 3 to be attracted and held in intii'nate contact with the core 2. This upward movement of the yoke brings the lingers 12 and 13 in contact with posts ll thus applying the secondarv voltage induced in winding 6 to the load circuit connected at 20. By means of the connectors 22 and LS any desired secondary voltage within the range of the instrument can be applied to the load circuit.

.Yhcn winding is de-energized, the yoke 3 drops and the fingers l2 and 13 break away from posts ll and make contact with posts 15, causing the auxiliary or emergency source of energy to be applied to the load circuit.

Referring to the circuit diagram shown in i 3, ith alternating current energy ay- (T )lied to posts 17 and 17 the operating cir- 1 our; for the device may be traced as follows: Starting at terminal 2-l of the secondary connector 22, linger l2, connector 2t), load circuit, post 20, connector iii l connector 22: and to post 25 of the secondary winning.

Vfith energy removed. from the primary winding, the auxiliary energy supply is made mrailable as follows: from the positiv terminal at post 19, contact block 15, linger 12, connector 21, post 20, load circuit, post 20, connector2l, linger 13, contact post 15 to negative terminal at post 19'.

Although I have chosen the particular structure herein described as the one most clearly illustrating the novel features of my invention, I wish it to be understood that many modifications can be made therein without departing from the spirit and scope of the invention.

lihat is claimed is:

1. In a system of power supply, an electromagnetic structure having a primary winding adapted to be energized from an alternating current source of supply, a sec ondary winding, a circuit including said secondary "inding and a normally open contact, and means for closing said contact when said electromagnetic structure is energized.

2. In a system of power supply, a divided laminated structure, primary and secondary windings on said structure in inductive relation to each other, and means operated by a portion of i 'l structure for connecting said secondary winding to a secondary circuit when the primary winding is energized.

In a system of power supply, a divided laminated structure, having a stationary portion and a movable portion, primary and secondary windings on the stationary portion of said structure, a normally open contact carried by the movable portion of said structure and closed when the stationary portion attracts the movable portion due to said primary being energized, and a circuit for said secondary winding controlled by said contact.

In a system of power supply, a divided laminated structure, having a stationary portion and a movable portion, primary and secondary windings on said structure, a normally open contact carried by the movable portion of said structure and closed when the movable portion is attracted to the'stationary portion due to the primary winding being energized, a circuit for said secondarylwinding controlled by said contact, and a band on said structure to prevent chattering of said movable portion when the structure is energized.

In a system of power supply, atransformer having a relatively large air-gap in its magnetic structure when the primary winding is de-energized and a relatively small air gap when the primary winding is energized and means whereby upon reduction of said air-gap due to energization of the primary winding of said transformer the circuit of the secondary winding is closed.

6. A transformer provided with primary and secondary windings, the magnetic structure of which is in a plurality of parts and a third winding on said transformer where by upon encrgization of the primary said parts are continuously held in intimate contact.

i". In combination in a transformer, a divided laminated magnetic structure, means for flexibly holding the parts in operative relation, an output winding on the same, and means controlled by the energizationof the transformer for closing the circuit-of the output winding.

8. A transformer provided with primary and secondary windings the magnetic structure of which is in a plurality of relatively movable parts, and means associated with said structure whereby upon energization of the primary said parts are continuously held in intimate contact.

l). A system of power supply comprising a transformer, an alternating current source of supply therefor, a secondary load for said transformer, 21 secondary source of power upply, and means controlled by said transformer for automatically connecting said secondary load to saidsecondary source of power supply in response to (lo-energizetion of the transformer. 1

10. A system of power supply compris ing a transformer, an alternating current source of supply therefor,la secondary load for said transformer, a secondary source of power supply, and means controlled by said transformer for automatically disconnecting said secondary load from the output winding and connecting the load with said sec ondary source of power supply in response to de-energization of the transformer."

11. In an electromagnetic device, a lamisaid emergency source or with the secondnated core structure, primary and secondary winding according as the primary windary windings on said structure, a yoke strucing is die-energized or energized. ture flexibly held in operative relation to In testimony whereof, I have signed my 5 said core structure, an emergency source of name to this specification.

energy supply, a load, and contacts on said yoke structure for connecting said load with OSCAR S. FIELD.

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