US1240930A - Electrical regulator. - Google Patents

Description

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ELECTRICAL REGULATOR. APPLICATION FILED JUNE II, I915- 1 40,930. 1 Patented Sept. 25, 191 7.

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WITNESSES: -!NVENTOR I I BY QIIO s. sou. ATTORNEY UNITED STATES PATENT OFFIGE.

CLARENCE A. IBODDIE, 0E PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO WESTING- HOUSE ELECTRIC AND MANUFACTURING COMPANY, A CORPORATION OF PENN- SYLVAN IA.

ELECTRICAL REGULATOR.

Application filed June 11, 1915. Serial No. 33,498.

To all whom it may concern:

Be it known that I, CLARENCE A. BODDIE, a citizen of the United States, and a resident of Pittsburgh, Pa., in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Electrical Regulators, of which the following is a specification.

My invention relates to electric regulators of the type in which the effective value of a resistance including in the field circuit of a dynamo-electric machine is determined by rapidly opening and closing a shunt circuit thereto.

The object of my invention is to provide a regulator of the character indicated which shall have only a single movable contact member thatmay be separately actuated by two electromagnets or similar devices, and

which shall be simple in construction and effective in operation.

My invention is illustrated in the accompanying drawin Figure 1 of which diagrammatically il ustrates a system in which it is employed, and Fig. 2 is also a diagrammatic illustration of a system embodying modified form of the regulator.

In the system illustrated, current'is supplied to' a distributing circuit 123 from an armature 4 of a generator, the field magnet winding 5 of which receives current from an armature 6 of an eXciter. In circuit with a field magnet winding 7 of the exciter is a resistor 8, the eflective value of which is determined by the engagement and disengagement of a pair of cooperating contact terminals 9 and 10 of a relay 11, having an actuating magnet winding 12 that receives current from the exciter, or from any other suitable source. Connected in parallel with the winding 12 is another electromagnet winding 13 of a relay 14, which comprises also a pair of cooperating contact members 15 and 16. By means of this arrangement of connections, the contact terminals 9 and 15 are caused to engage the terminals 10 and 16 simultaneously.

The circuits of the windings 12 and 13 are controlled by a pair of contact terminals 18 and 19, the former of which is carriedat one end of the horizontal arm of a bell-crank lever 20 having a stationary fulcrum at 21, and the latter of which is resiliently mounted as, for instance, by being attached to the free and of a plate spring 22. The

bell-crank lever 20 is adapted to be actuated by means of two other levers 23 and 24 that have stationary fulcrums respectively at 25 and 26 and are connected to the lever 20 by means of links 27, 28 and 29, the latter two links serving as a sort of toggle mechanism,

The lever 23 is adapted to be actuated by means of an electromagnet having a winding 31 that receives current through a transformer 32, or in any other suitable manner that is proportional to the voltage of the circuit 123. However, if the regulator is employed for other purposes than the regulation of voltage, the winding 31 may receive current that varies in accordance with any other desired electrical conditibn of a circuit. The movements of the lever 23, efl'ected by the winding 31, are retarded by means of a dash pot 33.

The lever 24 is in the form of a bell crank and is adapted to be actuated by an electromagnet having a winding 34 that also receives current proportional to the voltage, or any other selected electrical condition, of the circuit 123, and in circuit with which are suitable resistors 35 and 36. The degree of energization of the winding 34 is also determined by the engagement and disengagement of the contact terminals 15 and 16 of the relay 14 which are connected in shunt to the resistor 35. The movements of the lever 24 that are efiected by the winding 34, are also suitably retarded by means of a dash pot 37.

. In the operation of the regulator, if the voltage of the circuit 123 decreases, the windings 31' and 34 become less strongly energized. The lever 23, therefore, moves on its pivot in a clockwise direction and causes the link "27 to move downwardly which, accordingly, increases the angle between the links 28 and 29, and causes the contact terminal 18 to approach the terminal 19. Because of the smaller degree of energization of the winding 34, the lever 24 is also permitted to move in a counter-clock wise direction, thereby moving both the links 28 and 29 to the left and causing the contact terminal 18 to approach the terminal 19. It is thus apparent that the windings 31 and 34 both cooperate to regulate in the same manner, and, in practice, it is preferable to have the dash 0t 37 so adjusted that it is somewhat more rec than the dash pct and the resistor 35 is also included in cir-.

' cuit with the electromagnet winding 34.

Under this condition, the excitation and voltage of the main generator are decreased, and the energization of the winding 34 is also decreased to permit the lever 24 to revolve in a counter-clockwise direction and to thereby cause engagement of the terminals 18 and 19. Upon engagement of the said terminals, the contact terminals 9 and 15 are caused: to engage the terminals 10 and 16, with the result that the resistor 8- is removed from the exciter field circuit, and the excitation and voltage of the main generator are caused to increase. When the resistor 35 is shunted by the er agement of the terminals 15 and 16, the winding 34 becomes sufficiently energized to cause rotation of the lever-24 in a clockwise direction, and this,

in turn, causes separation of the terminals 18 and 19.

The regulator continues to operate in this manner, the winding 31 serving to vary the position of the terminal 18 with respect to the terminal 19 in accordance with the voltage or other desired electrical condition of the circuit 123, and the winding 34 serving to cause the terminal 18 to vibrate into and out of engagement with the terminal 19. The winding 34 also serves to effect the approximate regulation in the manner hereinbefore described.

In Fig. 2, I have shown a modified form of my regulator in which the main movable contact terminal is carried by a bell-crank lever 39 that is fulcrumed upon the lower end of a vertical arm of a bell-crank lever 40, that has a stationary fulcrum 41 and is actuated by the electromagnet winding 31. The lever 40 is in the form of a bell crank and has a vertical arm that is in substantial alinement with the vertical arm of the lever 39, the horizontal arm of the bell-crank lever 40 being connected, by 'means of a link 42, to another lever 43 that has a stationary fulcrum at 44 and is adapted to be actuated by the electromagnet winding 34. This regulator is distinguished from that of Fig. 1 in that the lever which carries the main contact terminal has no stationary fulcrum.

The operation of the regulator is similar to that of Fig. 1 in that the lever 40 serves to vary the position of the main contact terminals, whereas, the lever 43, cooperating with the lever 40 and the link 42, causes the main contact terminal to vibrate.

I claim as my invention:

1. An electrical regulator comprising two levers each of which has a stationary fulcrum, actuating means for said levers, a

movable contact member, and link and lever mechanism operatively connecting said levers and contact member whereby each of the said actuating means may move the said contact member independently of the other,

2. An electrical regulator comprising two levers each of which has a stationary fulcrum, actuating means for said levers, a movable contact member, and link and lever mechanism operatively connecting said levers and contact member whereby the actuating means for one of said. levers may vary the position of said contact member and the actuating means for the other lever may vibrate it.

3. An electrical regulator comprising two levers each of which has a stationary fulcrum, actuating means for said levers, a third lever also having a stationary fulcrum, a contact member actuated by said third lever, and means operatively connecting the said third lever with the other two levers whereby each of the said actuating means may move the contact member independently of the other.

In testimony whereof, I have hereunto subscribed my name this 13th day of May,

CLARENCE A. BODDIE.

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