US1098134A - Motor-controller. - Google Patents

Description

F. T. TAYLOR.

MOTOR CONTROLLER.

APPLICATION FILED JULY 28, 1909.

1,098, 1 34; Patented May 26, 1914.

UNITED STATES FLOYD r. TAYLOR, or NEW YORK, N. Y.. AssIs1voR TO THEV'CUTLER-HAMMER MFG.

' co, or MILWAUKEE, WISCONSIN,

PA ENro FioE;

A CORPORATION: OF WISCONSIN.

m mmm.

- To all whom it may concern: j v

Be it known that I, Fnorn TL'TAYLOIIS, a citizen of the United States,- residing at'h ew York, in the county. of New York and State of New York, have invented new and use-- v 7 illustrate. the general features of my nvenful Improvements in Motor-Controller-S 1 of which the following is a full, clear, conclse,

and exact description, reference being-had to the accompanying drawing, forming a part of this specification. I

My invention relates to improvementsin controllers for electric motors. I Where it'is desired to regulate the speed of a motorby means of armature resistance, it sometimes occurs that the motor will not start with .the regulating resistance in circuit. This mayibe due to the size ofthe motor or to the friction ofrest of the mechanis'm driven. thereby. It, therefore, becomes necessary to remove all or a portion ofthe regulating resistance from circuit to I start the motor and then to reinsertsaid resistance to obtain the desired speechregulation.

It-is, therefore, the object of my invention to provide a simple and efiicient device for V accomplishing the foregoing.

One. novel feature of my invention resides in the arrangement whereby the same resistancefinay be employed for starting and for speed regulation g Another novel feature of my invention resides inj'th'e' arrangement whereby themotor circuit will be automatically opened, unless a predetermined amount of resistance is removedfrom circuit to start the motor.

Another novel'feature of my invention re.-.

sides A in the arrangement whereby the amountof;resistance included for speed regulati'onunay be adjusted before the motor is started-andthe motor circuit automatically opened unless the regulating resistance is in-- cluded in 'circuit- Still another novel feature resides in the arrangement whereby the motor may be started and the desired amount ofregulating resistance inserted in circuit by the movement of a single controlling element to a predetermined point regardless of the amount of regulating resistance to be in sorted in circuit.' I

Various other novel'features and advan-' tages of my invention will. hereinafter be clearly and fully set forth.

For the purpose of more fully disclosing mg. g The controller shown -merely serves to t'i'on and-does not limit I my invention to any particular construction.

Of course, my invention is susceptible of various modifica-I i .65

tions. 1. a1"

The controller illustrated includes a starting arm land a speed regulating element 2 Specification ofLetterslat'entl \PatentedMay 26,1914. I. j Application filed July 28,1909. Serial No. 510,108. f I

'cally illustrated in the accompanying draw both of which are illustrated as pivotally supported upon a suitable'insulating' base 3.v

The starting arm 1 is provided with. a contact brush 5- adapted to engage and move over aseries of contacts6 and contacts 7", 8-, a

and 9. The brush 5 is adapted to :engage" each contact before leaving the next precede ingcontact. The arm 1 is provided with a ag inst a stop 11 is adapted to be retaining magnet 12. the retaining magnet, I might provide any other form su able spring 10, tending to move the sam provided on the base 3;, and v held in final, position Of course, -in lieu of; .80-

of locking device. The element 2 is movable between fixed stops 1?) and 14.

and is adapted to sweep over a series of contact buttons 15. Gontact'buttons 15 and the contacts 6 are electrically connected to a common resistance 17. the contacts 15 directly connected to the resistance 17, I have shown the same as electrically connected to the contacts 6', which,-

of course, produces the same result. The

arm l isadapted to cause the 'energrzation 35 Instead of showing. I

of a blow coil 18, the function of which will be hereinafter set illustrated, is provided for controlling a. mo-

tor having an armature A and a shunt field winding F-. Of' course, my invention is-ap; plicable to other'forgns ofmotors than that illustrated I shall nowde'scribe the operation of the controllerillustrated, at the Sametime set-.- ting forth, the circuit connections therefor.

Assuming'that the starting arm 1 is in the position illustrated, no current will. flow through the motor. 7 To, start the motor, it is necessary to move the arm 1 so that the brush 5' thereof will engage the first 'of'the series of contacts'6. This completesfthe motor circuit from main line 20 byconductor 21, through forth. The controller, as

e contact 7 is connected to the last section of resistance 17, and, when engaged by the start with all of the resistance 17 in its armature circuit. By moving the arm 1 over successive contacts of the series of contacts 6, the resistance 17 is gradually removed from circuit, thereby gradually increasing thepotential impressed upon the motor armature. lVhe'n the arm 1- has been moved sufficiently to cause the brush 5, carried thereby, to engage contact button 7 all of the resistance 17 will beremoved from circuit, and full line potential impressed upon the motor armature. This arrangement insures a suflicient potential to start the motor'under all conditions. Upon leaving contact button 7,

y the brush 5 of the starting arm engages con tact buttons Sand 9.- The starting arm is then held in this position by the retaining magnet 12, the circuit for which will be hereinafter traced. When the arm 1 engages contact-buttons 8 and 9, the circuits of the motor armature and field Winding may be traced as follows. The field circuit may be traced from contact. button 9 by conductor 27, through-the retaining magnet 12, to COD-,- ductor 2,2 and thence through the field winding as-already traced. The armature circuit may be traced from contact button 8, by conductor 28 through the speed regulating element 2 and through a portion of the resist-- ance 17 to the motor armature as already traced. It will thus be seen that upon the arm 1 reaching final position, a portion of the resistance 17 is reinserted in circuit with the motor armature, thereby reducing the potential impressed thereon. The amount of resistance thus reinserted in the motor circuit depends upon the position of the element 2. As illustrated, the element 2 is so disposed that upon thestarting arm 1 reaching final position, approximately one half of the resistance 17 will be reinserted in the motor circuit. Consequently, the motor will operate at a comparatively slow speed. To increase or decrease the speed of the motor, it is only necessary to move the element 2 in one direction or the other in accordance wit-h .the result which it is desired to obtain. Of course, the element 2 may be adjusted before the motor is started so that when the start- A ingarm is moved to final position the speed of the motor will be limited to a predeter- If the motor starts upon this operaguishing such arcs that I have provided the blow-out magnet 18, which, it is apparent, becomes energized when the starting arm engages contact button 7, and W1ll, consequently, extinguish any are produced supon said arm leaving said contact button.

Upon denergization of the retaining magnet from any cause Whatever, the starting arm would be returned to initial .posi .tion by the spring 10, thereby reinserting all. of the resistance 17 in circuit and finally opening the motor circuit. Consequently, there is no danger of a careless attendant starting the motor without a proper amount of resistance in the motor circuit. Furthermore, the starting arm must be moved to final position in order to maintain the motor circuit closed, and this, of course, always'insures the starting of the motor and prevents an attendant from leaving the motor circuit closed without starting the motor. I

I WVhile I have shown a manually operated starting arm, it should be understood that the same might be automatically operated if desired. a

I clai1n- I V 1. In a controller for electric motors, in combination, a resistance controlling element movable to one position to start the motor and to another position to restrict the speed of the motor and means for limitingthe speed restrictive effect of said element whenmoved to said last-mentioned position.

2. In a controller'for electric motors, in

combination, a resistance controlling element movable in the same direction to start 4 the motor and thenrestrict the speed there of and means necessitating movement of said element to a speed restrictive position in order to maintain the motor in operation after its release. v

4. In a controller for electric motors, in

,combination, aresistance wont-rolling element movable in the same directionz'to' 'start the motor and then restrict the speed the'reof and means for varying the speed restrictive effect of said element while =in'a predetermined position.

5. In a controller for electric motors,in

' ling element normally disconnected from combination, a resistance combination, a resistance controlling member biased in adirection to disconnect the motor from circuit, said member being movable to start the motor and then restrict the speed'thereofand an electromagnet for holding said member in its speed restrictive position. I

6. In a controller for electric motors, in

controlling momber biased n a direction to stop the motor, said member being movable to start the motor and then restrict the speed thereof, an

varying the restrictive efiect of said member magnet. l 7. In combination, a res stance controlcircuit and adapted when connected in circuit to restrict the potential nrnpnessed upon,

. the motor to restrict the speed of the motor,

and a second risistance controlling element movable to a position to start the motor and then to another position to connect said first mentioned element in circuit.

8. In combination, a resistance controlling element normally disconnected from circuit-and adapted when connected in cir-' cuit to restrict the potential impressed upon the motor to restrict the speed of the motor, and a second resistance controlling element movable to a' position tostart the motor and then to another position to connect said first mentioned element in circuit said second mentioned, element automatically operating to stop the motor if released before it is moved to said second mentioned position.

'9, In a I motor controller, in combination, two resistance controlling elements, one for gradually'increasing the potential uponthe motor for starting and the other for restricting the potential impressed upon the motor for speed regulation, said second mentioned element being normally ineffective and said first lncntioned element being adapted after starting the motorto render said first mentioned element efi'ective." 10. In a motor controller, in combination, two resistance controlling elements, one for gradually increasing the potential upon theand the other for restricting the potential impressed upon the motor for speed regulation, said second mentioned element being normally ineffective and said first mentioned element being adapted after starting the motor to render said second mentioned element effective, said first mentioned element tending to stop the motor if released before said second mentioned'element is rendered effective.

11. In a controller for electric motors, in combination, a variable resistance included motor circuit for starting,"

in the motor circuit, a

- combination, the motor circuit for starting,

predetermined amounts of said resistance in the motor circu t for spe'ed regulation, said 'disconnected from turn the same to combination,

1 element movable z said starting element in the motor circuit, a com-rolling clement adapted to remove said resistance from the and" to include said resistance in circuit for speed regulation, and .Inea'ns for limiting the amount of said resistance included in circuit by said element for speed regulation. 7

12. In a controller for electric motors, in combination, a variable resistance included for removing'said resistance from the motor circuit for-starting, and a controlling element adapted to be adjusted to include-different predetermined amounts of said re-' sistanoe'in the mot r circui-t for speed regulation, said second mentioned'elementbeing normally disconnectedfrom'circiiit' and arranged to be connected in circuit" by said first mentionedelement when [in a predetermined-position. y I g 13. In a controller'for electric motors, in a variable resistance included circuit,ja controlling element ror removing said resistance from the motor adapted to be adjusted to includediiferent element being normally circuit and arranged to be connectedincircuit by said first men tioned elemen'tcwhen in final position, means for maintaining said firstmentioned element in finalp'osition, and means tending to reinitial position.

14 In a controller for electric motors, in combination; a resistance included in the motor circuit, controlling means therefor, adapted to permanently include different predetermined amounts of said resistance in second mentioned a controlling element I controlling elementthe motor circuit 'for speed regulation, and

means necessitating the removal of a predetermined amount of said resistance prior to the insertion of the portion, or portions, thereoi for speed regulation.

15 In a controller for electric motors, in two series of contacts, a com-- mon variable resistance connected. to both of said series of contacts and adapted-to be.- connected in the over one of said sets .of, contacts, a speed. regulating element movable over the other of said sets of contacts, being adapted to be moved to remove sai resistance from themotor circuit, said ment being normally circuit, and a contact disconnected from said arranged to; be engaged speed' regulating eleby said starting. element to connect said speed regulating element in circuit, said speedregu'lating element being arranged to include different predetermined amounts of said resistance in the motorci'rcu'it.

16. In a controller for electric motors, in combination, two sets of contacts, a common variable resistance connected thereto and arranged-to be connected in the motor'circui a starting element movable over one set of contacts to remove said resistance from circuit, and an element movable .over the other set of contacts to include difierent predetermined amounts of said resistance in the motor circuit for speed regulation, said last mentioned element being normally discon-.

nected from circuit and adapted to be con..

' circuit, a starting elementmovable over vone set of contacts to remove'said resistance from circuit, an element movable ovg the other set of contacts to include different predetermined amounts of said resistance in the motor circuit for speed regulation, said lastmentioned element being normally disconnected from circuit and adapted to be, connected in circuit by said starting element after the same has been moved to a pre dete'rmined position, means tending to return said starting element to initial position and a retaining magnet for holding said startingelement in position to maintain said regulating element in circuit.

' ing the are 18. In a controller for electric motors, in combination, a resistance adapted to be connected in the motor circuit, a set of contacts connected therewith, an element movable over said contacts to gradually remove said resistance from circuit and adapted to be disengaged from said contacts to reinsert resistance in the motor circuit for speed anda blow out coil for disruptformed upon said element leavsaid contacts.

regulation,

combination, a resistance adapted to be connected inthe motor circuit, a set'of contacts connected therewith, an element movable 19. In a controller for electric motors, in

over said contacts to gradually remove said I resistance from circuit and adapted to be disengaged from said contacts to reinsert resistance in the motor circuit for speed regulation, and a blow out coil for disrupting the are formed upon said element leav ing said contacts, said blow out 'coil being energized when said element engages the last of said contacts.

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

- FLOYD T. TAYLQR. Witnesses:

C. B. SAGONA, v H. JAooBsoN.

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

' Washington, D. 0."

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