US990464A

US990464A - Controller for electric motors.

Info

Publication number: US990464A
Application number: US50694209A
Authority: US
Inventors: Floyd T Taylor
Original assignee: Cutler Hammer Manufacturing Co
Current assignee: Cutler Hammer Manufacturing Co
Priority date: 1909-07-10
Filing date: 1909-07-10
Publication date: 1911-04-25
Anticipated expiration: 1928-04-25

Description

F, T. TAYLOR.

CONTROLLER PQR ELECTRIC MOTORS. APELIUATION FILED JULY 101909. QQQ-a Patense Ap?. 25, 1193i.

2 SHEBTS-SHEET l.

E'. T TAYLOR.

CONTROLLER FOR ELECTRIC MOTORS.

APPLIOATION FILED JULY 10, 1909.

j. atented Apr. 25, LSH.

2 SHEETS-SHEET 2.

'kvioiaflll vwhom fit may conc-ern:

Bejit known thatI, FLOYD T. TAYLOR, a

' 'UNITED srarns ra'rnn'r OFFICE.

T. TAYLOR, OF NEW YORK, N. Y., ASSIGNOR TO THE CUTLER-HAMMER MFG. C0.,

OF MILWAUKEE, WISCONSIN, A CORPORATION. OF WISCONSIN.

CONTROLLER FOR vELEC'IRIC 'MOTOR/S.'

Specification of Letters I'atent.

ratentea'apr. 25, 1911.

Application filed July 10, 1909. eria1 No. 506,942.

. itizen ofthe nited States, residing at New York, 'in the county of New York and State lof New York, have invented new and useful Electric a full, referthe accompanying draw- I Improvements in Controllers for .l\/Iotors,a of which the following is clear, concise, and exact description, ence being had to in, forming a part of this specification.

- Iy invention relates to improvements in controllers Yforelectric motors.I

It is the object of my invention to provide means necessitating the operation of an electric motor -in stages and automatically varying the 'r'ange of operation of the motor durin(r successive stages.

p any particular application.

. y invention is particularly applicable to` the control of furnace tops and other motor operated machinery where it is desired tov operate, the driven mechanism for different predetermined distances in a predetermined order and ',to insure t-he stopping of the driven mechanism each time it has been operated the desired distance.

Of course my invention is not limited to For the urpose of more fully disclosing my inventlon, I Ashall describe the device 4illustrated in the accompanying drawing. l,

Of course, my invention is not 4limited to on a `gear wheel 2 1', which meshes with a pm-` the exact construction of the device illust-ratcd as varlous changes may be made therein without departing from the scope of my invention.

In the accompanying drawing, Figure 1 is a front elevation of the-device; Fig. 2 is a sectional view taken online 2-2 Fig. 1 with the contact member of the device in a diiferent position from that illustrated in Fig. 1; 1

and Fig. 3 diagrammatically illust-rates one formed in two parts, the parts being secured together withrsuitable insulating material 1 inter osed between the same. l he purpose of this arrangement is to insulate the outerv in a suitable supporting memb end of the member 3 from the shaft 2. The

member `3 in the present instance is provided withthree contact brushes 5, Gand 7 which, in practice, may As illustrated, each of these brushes combe of any 4preferred type.

prises a cylindrical contact portion fitting into a cylindrical recess in the arm 3.and provided with a stem which passes through said arm and forms a guide. The brushes, 6 and 7 are arranged to engage contact rings 10 11 and 12 respectivel f, and are referably yieldinglyheld against said rings by means of suitable springs 13. The rings 10 and12 are provided with

insulated portions

14 and 15 respectively, while the ring 11 is continuous. The erably stationary and secured to the insulating base 1 by any suitable means, such as

rings

10 and 11 are prefscrews 17. The ring 12, however, is arranged to revolve.' This ring is secured toa suitable spider'18 having a hub '19 loosely fitting onto the shaft 2. l the ring 15 be insulated from the shaft '2, and 1 have, therefore, shown the ring 12 ing sul ated from the arms of the spider at the 'points of connection therewith. In practice, I prefer to drive the ring 12 from the shaft 2, but at a reduced speed. Of course, various means might be employed in practice for accomplishing this result. As illustrated, the hub 19 of the spider 18 has formed thereion 22. The pinion 22 is arranged to re"- volve with a gear wheel 23, arranged to mesh with a pinion 24. keyed, or otherwise rigidly connected to the shaft 2.

As illustrated, the gearing just described is so proportioned that the ring' 12 will be driven at a considerably slower specd'than the shaft 2 and the contact member 3, which is keyed to said shaft. tice, the gearing may be modified to give any preferred speed ratio ofthe contact member 3 and the ring 12. v In practice, the ring 12 may be operatedv in a reverse direction from the contact member, but,"as illustrated, it is arranged tov operate' in the same direc.- tion as said member. The ring 12may be vconnected in circuit in any` preferred man,- ner. A s illustrated, lI have shown 'a vbrush y 25 adapted to engage the rear face of said ring, said brush being yieldingly mounted er 26, having a binding post 27.

Of course, in prac-l In practice, the shaft 2 1 Itis essential that 28 is supplied with current' from main linesv 29 and 3()A through a double polejswitch 31. vFor controlling the continuity of the motor circuit, I have shownA an eleetromagnetically operated Adevice 32,` comprising a pivoted member 33 tending to normally stand in a position .to opemthc motor circuit and adapted to be moved over a series of contacts' 34 to first close the' motor circuit and then gradually remove a .starting resistance 35 -from ,the motor circuit. Y Of course, in

practice, any preferred'means may be employed for controlling the motor circuit.

'- The device 32 is provided with a suitable Ioperating windingI -3G, one terminal Voi which is connected directly to `oneo the main lines, Awhile its opposite terminal is connected la' a conductor 3T to the ring 11 ofthecontr-iling device. For initially controlling the/operating winding 3G, I have provided a suitable switch 3b, which, in practice, may be of any preferred type. As illustrated, thev switch 38 comprises a manually operated member adapted to be moved from a central position into engagement with contact button 39 01' contact button 40. Contact button-39 is connected by conductor 41 to ring 10 of the controlling device, while contact button 40 is connected by conduct-or 42 to the revoluble ring 12.

I `shall now describe" the operation of the controller, assuming the member 3 of the controlling device to be in the position illus-l trated, in which position the contact `brush 5, carried thereby, engages the vinsulated .portion 14 of ring 10. In this position of the member 3, in order to energize the de- I vvice 32 to start theV motor, it is necessary to move thecontrolling switch 38 into engage ment with contactbutton 40. This closes a circuit from mainline 29 byconductor43- through the controlling switch 38 by c onductor 42 to ring 12, andthroughdsald ring to brush 7, thence through the member 3 to .brush 6 and ring 11, andthenceby conductor 37 through the operating winding 36' `raising the arm 33 of the starting and by conductors 44 and 45 to mainline 30. The Winding 36 thereupon res y nds,

As soon as the arm33 engages the first of the contacts'34,`circuit is closed from main line 29 throughthe series field winding F land armature A of the'motor byconductor evice.

Ying 36 of the startin 46through the starting resistance 35, and

. the arm 33 by conductor 45 tothe negative side/of the line. This, of course, starts the motor Vwith all of the resistance in circuit.

The device 32, however, operates automata-- set forth, the motor will .continue to operate until the brush 7 of the controlling member 3 passes onto the insulated portion l5 of the contact ring 12 thereby denergizing the starting device. The contact ring 12,

however, is arranged to operate in the same direction as'the 'member 3and it is, therefore, necessary for the member 3 to operate a considerable distance before overtaking and engaging theV insulated portion 15.

The length of time consumed in this opera-v .tion depends entirely upon the speed ratio ofthe member 3 andthe ring 12. For the purpose of illustration, we will assume that the,memben'lv will not overtake the insulated portion of the ringl2 until said 1neinber has moved 120 degrees. Consequently, if the member 3 is arranged to operate at the same relative speed as the driven mechanism, the driven mechanism will operate 120 degrees before the motor is brought to rest. lYlxen the member 3 has reached the insulated portion ot the ring 12, thereby opening the circuit of the operating winding of the starting device 32, the brush 'thereof Will be in engagement with Contact ring 10. The motor ma)v then be again started by moving tlic't-,ontrolling switch 38 i'nto engagement with contact button 39. This closes a circuit vthrough the switch38 'by conductor 41y to contact ring 10,.and brush 5 through themember 3 to brush 6 and ring 11, and` thence through the operating Wind- 0 device in the manner already set forth. v The device 32 will thereupon respond again starting the motor and bringingrthe same' up to speed. This, of-

course', sets the member 3fand the ring 12 insilated portion 14 of the ring 1Q. This,

however, will require 240 degrees rotation ofthenmember 3, thereby causing the driven mechanism to be operated 24() degreesbefore-the motor is again stopped, v `Whilethe arm 3 1s vreturning to-initial position, the ring 12 is moved farther away from the insulated portion of ring 10 and, consequently, .when the motor is againv Started by throwing the controlling switch into engagement with thecontactibutton 40, the member 3 Will-have to rotate probably more than 360 degrees in order to overtake the insulated portion of the ring 12 to again stop the motor. v

From the foregoing it will readily be seen that the range of= 'operation of the motor during successive stages maytlius be automaticallyV varied almost indefinitely. Ot' course, in timethe cycle of operation would berepeated, but numerous variations in the range of operation of the motor would necessarily be obtained. As before stated, the speed ratio of the member 3 and the ring 1.9. may be adj usted to give practicallyiany desired variations in the range of operation of the motor during successive stages.' It will also be understood that the speed ratio of the member 3 and the motor 'or driven mechanism may be adj usted as desired.- Further, either or both of the contact rings might be provided with more insulated portions and the number of contact rings varied if desired. i

1.v Ina controller for -electric motors, in

combination, a contact member and a contact.

arranged. to be engaged and, disengaged thereby, said member, upon disengaging said contact, being adapted to stop the' motor, and

said member and Asaid contact being movable automatically at relatively different speeds to vary the range of operation of the motor during successive operating periods thereof. 2. ln a controller for electric motors, in combination, electi'oresponsive means for controlling the motor circuit, and an auton'iatically operated switch having a contact member and a contact therefor, said member, upon disengagiiig said contact, being adapted to cause thedenergization of said means to stop the motor, and said member and .said

contact being movable at relatively different speeds for varying the range of operation of the motor. during successive operating pe- A riods thereof.

3. In a controller f oiele'ctric motors, in combination, a contact member, and a plu i'ality of c'ontacts arranged to be engaged ternatel y discngage said contacts to stop the motor, and said member and one of said contacts being arranged tobe automatically operated at relatively different speeds to vary the range of operation of the motor during successive operating periods thereof.

4. 'In a controllerv 'for electric motors, in combimtion, means -for starting the motor. and an automatically o elated-switch having a contact .member an a plura'lity of contacts arranged to be engaged thereby, said member being adapted to alternately disengage said contacts to stop the motor, and to 'always remai'n in engagement with one of saidcontacts' to enable said means to be opthertby, said memberbeing-adapted to al-v erated .to cause the motor to operate in fstages, said member and one ofsaid contacts being movable at relativelyditl'erent speeds to vary the range of operation of the motor during successive stages of operation thereo'l".` 7i, 5. In a controller for electric motors, in

combination, a contact member and a lurality of contacts arranged to be engage thereby,ksaid member and one of saidcontacts being arranged to be automatically operated 7.5 at relatively different speeds, said; cpntaet member being arranged to alternately 4disengage said contacts to stop the motor,said

movableeonta'ct'being adapted to necessitate I said contact member Vbeing moved varying So distances to stop themotor, thereby varying the range of operation of the motor `during successive operating periods. j'

. 6. In` a controller for. electric motors, in combination,` electroresponsive means for controlling the motor circuit, and an autoi matically operated switch having a contact member and a plurality of contacts arranged to be engaged thereby, said contact membe' being arranged to alternately discngage said contacts -to de'nc'rgizc said means to stop the motor, thereby necessitating operation of the motor in stages, ,said movable lcontactbeing adapted to necessitate said .member being. moved varying distances' to'stop the 95 motor, thereby varying the range ofoper: 4tion of the motor during successive"stages.4

7L' In a controller. for electric motors, combination, electroresponsive means for controlling the motor circuit, an automatrmw cally operated switch having a '.coiitat" member and plurality of contacts .ar ranged lto .be engaged thereby, said Contact;` member being arranged to alternately dis' engage said contacts to dcnergize said means to 'stop the motor, thereby necessitat-- ing operation of the motor insta'ges, said movable contact'being adapted to necessitate said member being moved varying distancesto stop the motor, thereby varying the range' 110 of "operation of the motor during successive' stages, and means for causing the energihai tion of said first mentioned means when si itl member is in engagement -with either of saidcontacts.l A 115 8. Inf a controller for electric motors, in combination, electroresponsive means for controlling the motor circuit, said means having a plurality of energizing circuits, a

-cuits, contacts arranged to be engagetlfbyw s'aid member to include the same in either of said circuits, said contact meiiibcr being movable to alternately disxiigage said Vcontacts to alternately open said control cir- 'cuits to cause said means' to stop the motor, and one of said 'contacts heing`movable at a relatively different speed 'from Said menibeig to necessitate said member being moved varying ldistances to open said circuits, 13`0 Y thereby varying the range of operation of the motor during' .successive operating periods thereof. i

9. In a controller for electric motors, in combination, electroresponsive means -for controlling the motor'circuit, said means having parallel energizing' circuits, asingle controlling switchv arranged to close either of said-'energizing circuits, an automatically operated switch member common to said parallel circuits, andcontacts'arranged to be engaged'by said'svvitchv member to in clude the same in veither circuit, said member being always in engagement with one of said contacts and arranged to alternately disengagesaid contacts to alternately open said circuits to causesaid means to stop the motor, one of saidcontacts being automatically'movableat arelatively different speedfromrsaidmember to necessitate said member being-s; moved" varying distances prior to stoppin'gthe motor, therebyvarying the range ofoperation'of-'the motor during successiveY operating' periods.

10. In an electric switch, 'in'combinatiom a cont-act member and acontact therefor, said'inember" and saidy Contact beino'. arranged, to' be moved at relatively ditierent speeds, said contact member moving'longitudinally of" said contact.

l1. Inl-an' -electric switch, in combination, a contact member and a plurality of contacts arrangedo be engaged thereby, said contact member' and yone of said contacts being movable at--relatively diierent speeds, anotherI of said contacts remaining stationary.'-

A l2. In an electric switch, in combination,

a contact member, and aplurality of contacts arranged to be engaged thereby, saidcontact member being movable to alternately disengage said contacts; and` one of said contacts being movable at a relatively different speed from said contact member to necessitate said member being moved varying distances prior lto disengaging said contacts.

13. In an,electric switch, in combination, a movable contact member, a plurality of contacts arranged to be engao'ed thereby .to

connect saidmember in dilierent circuits,

said member being arranged to alternately disengage said contacts to alternately interrupt said circuits, and one of said contacts being arranged to move at a relatively different speed from said member to necessitate said member. being moved'varying distances prior to disengaging said contacts. v

14. In an electric switch, in combination, a pivoted contact member, and a pair of curved contactstrips arranged to be engaged thereby, said'member being movable to alternately disengagc said contact strips, and one of said contact strips being movable at a relatively diii'erentspeed fr' n said -member to necessitate said menige being moved varying distances in order to disengage said strlps.

In witness whereof, I have hereunto subscribed my name in the presence of tWo wit nesses.

v FLOYD T. TAYLOR. lVitnesses LAURA E. SMITH, M. GoLDs'rnrN.