US1066616A - Motor-controller. - Google Patents

Description

A. J. HORTON.

MOTOR CONTROLLER.

Patented July 8, 1913.

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MOTOR CONTROLLER.

APPLICATION FILED JULY 6, 1908.

1,066,616, Patented July 8,1913.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFI E;

ALBERT J. HORTON, OF WHITE PLAINS NEW YORK, ASSIGNOR T0 THEHSUTLERL HAMMER MFG. co., OEMILWAUKEE, wi'soonsm, A CORPORATION or WISCONSIN.

MOTOR-CONTROLLER.

Application filed July 6,

To all whom it may concern:

Be it known that I,'ALnEu'r J. Hon'roma citizen of. the United States, residingmt clear, concise, and exact description, reference being had to the accompanying draw in-g, forming a part of this specification My invention relates to improvements in motor controllers, and more particularlyto compound starters and, field regulators.

' In controllers for regnlating both anarmature-resist-ance and a field resistance, the

controlling member, onmembers, are some-,

times arranged to pass over both sets of resistance, contacts durigg the removal of the armature resistance from circuit;

My invention has for itsobject: to provide an auxiliary switch for such controllers which: will remove. the: field resistance from circuit until' the controlling member, or

members, have been moved to cut out all Of the armature nesistance from circuit.

For" the pu'lrpgme of illustrating 'my invenr t-ion I' have shown the pre erred form thereof embodied: inla motor 'eontroller -of the same general construction: as that shown in heunderstocd, howeveflhthat my invention -cuit arrangementffor my dewice inapplicable to otherforms OfjCOHt-ifiliES 7 than that shownin the drawing.

the purpose of; better; illustrating'tlie 'joonn s struction thereon 5 F ig'. g2 isa vertical sectioniil view ta'kenron 'li-n 51-, with the resistance controlling. arms moved to 5 the'central position :Fig. 3* shows As before statem, the device -{shom"m-'the drawingis of tl'xeflsamc generalccnstructionk:

as that showniin my former patent, the sevenal! parts thereof bein'g nggr ntedi on angin. sulating base or jpaneh-J f The panel carries a seriesofi contactsfl, adapted;

to beconnecte d'toa field regulating resist: ance and: a series-'- of contacts-3,;adaptcd to? bewconnected to anqarmatuee' controlling elemen'trcomprifses t V e 1 teeme r ecome s pag ' Specification of Letters Patent. I

Patentedfluly 8. 19 1 1908. Serial No. 442,175. 1

a brush 7. adapted to sweep over the contacts 3, while the member 5 carries a brush 8 adapted to sweep over the contacts 2. The brushes 7 and 8 maybe of any desired construction. An operating handle 9 is secured to the member. 5, adjacent to itsfree end. A coil spring 10 tends to move the vided with a spring butfer- 1-2. The memher 5 carries a pin 13 adapted to engage with a pin. 14 carried by the member 4 whereby, the members 4 and 5 will move together in one direction against the action of the spring 10 The member 4 carries an armat-ure15 adapted. to engage with the pole pieces 16- of a retaining magnet 17. VY hen the magnet 17 is energized it holds the member 4 in its final position aftm' the removal o-f the-armature resistance from circuit, thus permitting the member 5 to 'be movedin an opposite direction, independently of, the member 4. A pin 18, carried by the member 5, is adapted to engage a lug 19, carried by the member 4, to limit the movement of themember 5 when moved backnove r the 'contacts2'. L t

Aes'previously stated, my invention has for itsobject to provide means for removing the-field resistance from circuituntil all of the armature resistance is removed from circuit. foraccomplishing this result comprises an carried by the base, and adapted to move over a series of three contacts 22, 23 and 24. Theswitch 20' carries aflspring contact plate vprefem/bly slotted to form two contact fingers 25. A coiled spring 26, carried by the and ab rits other end: to the-switch 20. This gspring tends to move the switch 20 against ;sh anld be understood. that the auxiliary lswitch may assume various iiormsQr In this ipositiom ofthe switch the contact fingers iZivEthereof engage and electrically-connect contacts22. and 23. As will be hereinatter=setf forth, the contacts 22 and 23 are shomz oiireuited 'U he' ,contact 24s is dead. emcee 2Q-provided with an exten which; projects into the! member 4 against a stop-l1 which is pro- The means which I have shown auxiliary switch-'20, fulcrumed on .a' pin 21' 21;, is connected at one end to said pin adapted- 1 be connected ina shunt-circuit f around the field. I regulating resistance, and,

thepeforg whent-gsaid contacts are bridged;

fasbop 27' carried bythe contact 22. It"

23 and 24., therebyvopening the short-circuit around the field resistance.

I shall now describe the circuit arrangement shown in Fig. 3. The first two contacts of the series of contacts '2- are dead,

' while the remainder of said contacts are connected to a field regulating resistance 30.- The first contact of the series of contacts 3 is dead, while'the remainder of said contacts are co nnected'lo anal-mature resistance 31. Both members of the controlling element are connected by conductor 32 through main line switch 33 to the main line 34. The last of the seriesofcon'tacts3 is connected by conductor 36 to one terminal of the motor armature a, while the other termi nal of the armature is connected by conduc-i tor 37 through switch 33 to mainline 35. The last of the series of contacts 2. is e nected by conductor 38 to one terminal of the shunt field winding of the motor,

while the other terminal of said windingds connected by conductor .39-to conductor The first live contact 2 isiconnected by conductor 4O to the first live contact- 3' which is connected byconductor 41 to oneterminal of the-winding of the retaining magnet 17; The other terminal of thewinding 17is connected {by conductor 42 through a resistance 43 to conductor 37. Contact 23 isconnected by conductor 44 to conductor 41. Con-v tact 22 is connectedby conductor .45 to the last of the series of contacts 2.

In operation, the main line switch 33 is first. closed and then the controlling element moved to the right. As already explained,

when the controlling element is moved tothe right, both of the members 4 and 5 are actuated. As soon as the'brush 7, carried by the member 4, moves ofl? of the dead contact; and onto the second contact of the series of contacts 3, circuitis closed through the I motor ai'u'mture. This'circuit may be traced from conductor 34, through SWlt-Cll by conductor 32, through member 4 and brush 7 to contact 3, through the resistance 31 by conductor 36, through the motor armature (a and by conductor 37 to thenmiu lme At thc same time-that the armature circuit is clo'sed-the shunt field circuit is also switch 20 to contact closed. This circuit may be. traced, us already described, to the member 4, thence to contact 3, by conductors 41 and 44 to contact 23, through the contact fingers of thehist of the series of contiicls -2,"'flud then by conductor 38 through shuntfieldwindiug' by conductor 45 to 5, during the removal ofithe armature 1e 'sistance'from circuit, will notatfect the strength of the shunt field winding f. As 1 the controlling element is moved to the right the member 4 thereof gradually removes the resistance 31 from the armature circuit until all of the-sa'me is finally removed from cir- *cuit and the armature 15, carried by the member is attracted bythe'retaining magnet 17. The circuitfor the retaining mag.-

net may be traced from the second contact of the series of contacts 3 by conductor 41, through'the Winding 17, by conductor 42, through resistance 43 to conductor 37 and thence to the main line 35. As the last section of the resistance 31 is removed from circuit, the pin 29, carried by the member 4,

engages the extension or tail piece 28 of the switch 20, and movessaidfswitch out-of engagement with the contact 22, and into engagement with contacts 23 and 24. As soon as the switch 20 is moved out of engagement git-h the contact 22 the short-circuit around 1e resistance. 30 is opened. member 4 has been lockedin its final posi ti'on by the retaining magnet 17, the'member 5 may be moved back over the series of contacts 2 to regulate the field resistance 30to cause the motor to operate at the' desired speed. If, for instance, the brush 8 of the member 5 is moved into engagement'with the central contact of the series of-contact-s" 2, the field circuit niaybe traced from memher 5 through half of the resistance 30 by conductor 38 through the field winding to main line 35. Inasmuch as the member 5 is no longer under the'infiuence of the spring 10, it will remain inany desired pos has the tion until manually m'oved to another posi 'cause,'the voltage of the main line fails, the

magnet 17 will release the member 4, which, under the influence of the spring 10, will fly back to its initial position. In returning to its initial position, thepiru14 thereby will engage the pin 18,0urricd bythe member 5, and also return the same toits initial position, thus opening both the. armature circuit and the field circuit. Also, as soon as the nw'rubcr 4 is released and returusto its initial position, the switch 29 Will be returned to its initial position, or, in other' each of said members, said members being movable together in one direction and one of said members being/movable in the opposite direction independently of the other of said members, and an auxiliary switch for shortcircuiting the resistance controlled by said independently movable member during the joint movement of said members, said auxiliary switch being arranged to be actuated by said element when in a predetermined position to open said short circuit.

2. In a controller for electric motors, in combination, a controlling element comprising two members, a -sistance regulated by each of said members, said members being movable together in one direction and one of said members being movable independently of the other in an opposite direction, an auxiliary switch tending to stand in position to short-circuit the reslstance controlled by said independently movable member, said switch being adapted to be actuated by said controlling element when in a predetermined position to open the short-circuit, and a retaining magnet for holding said switch after the same has been actuated.

In a controller for electric motors, in combination, a controlling element comprising two members, an armature resistance adapted to be regulated by one of said members, a field resistance adapted to be controlled by the other of said members, said members being movable together mono direction, to remove said armature resistance from circuit, an auxiliary switch tending to stand in position to short-circuit said field resistance, and adapted to be actuated by the armature resistance controlling member,

when in a predetermined position, to open said short-circuit and a retaining magnet for holding said armature resistance controlling member upon the removal of said armature resistance from circuit.

.4. In a controller for electric motors, in combination, two resistance regulating members movable simultaneously to start the motor, one of said members beingmovable independently of the other thereafter and a switch rendering said independently movable member ineftective during the simultaneous operation of said members and arranged to be actuated by the other of said members when in a predetermined position to render said independentmember effective.

5. In a controller for. electric motors, in combination, two resistance regulating members movable together in one direction to start the motor and one being independently movable of the other thereafter and a switch rendering said independently movable member ineffective during the joint movement of both members, said switch being operated by the other of said members when in a predetermined position to render said independently movable member effective.

6. In a controller for electric motors, in combination, an armature resistance, a field resistance, a switch normally short-circuitin g said field resistance, an armature resistance controlling member adapted when in a predetermined position to actuate said switch to open said short-circuit around said field re sistance and a field resistance controlling member movable with said armature resistance controlling member to said predetermined position and movable independently thereof thereafter. a

7. In a controller for electric motors, in combination, an armature resistance, a field resistance, a switch normally short-circuiting said field resistance, an armature resistance controlling member adapted when in a predetermined position to actuate said switch to open said short-circuit around said field resistance and a field resistance controlling member movable with said armature resistance controlling member to said predetermined position and movable independently thereof in an opposite direction to regulate said field resistance.

In witness. whereof, I have hereunto subscribed my name in the presence of two witnesses.

' ALBERT J. HORTON. Witnesses:

\VlLLIAM L. CULLY, CHARLES B. BAKER.

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

Washington, D. C.

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