US1268574A - Motor-controller. - Google Patents

Description

A. J. HORTON.

MOTOR CONTROLLER.

APPLICATION FILED mu: 4. 1915.

1,268,574, Patented June 4, 1918.

2 SHEETS-SHEET I.

A. .1. HORTON.

MOTOR CONTROLLER.

APPLICATION HLED JUNE 4. 1915.

1,268,574. Patented June 4,1918.

.2 SHEETS-:SHEET 2.

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UNITED STATES PATENT OFFICE.

ALBERT J. HORTON, OF WHITE PLAINS, NEW YORK, ASSIGrNOIB. TO THE CUTLER- HAMMEB MFG. 00., OF MILWAUKEE, WISCONSIN, A CORPORATION OF WISCONSIN.

MOTOR-CONIBOIJLER.

Specification of Letter: I'atent.

Application filed June 4, 1915. Serial m. 32,078.

To all whom it may concern:

Be it known that I, ALBERT J. HORTON, a citizen of the United States, residing at White Plains, in the county of Westchester and State of New York, have invented new and useful Improvements in Motor-Controllers, of which the following is a full, clear, concise. and exact description, reference being had to the accompan ing drawing, form ing a part of this speci cation.

This invention relates. to improvements in motor controllers. a

More particularly the invention relates to controllers for motor-driven printing presses but, as will later be apparent, it is not limited to this particular application thereof.

One of the objects of the invention is to provide push button governed control means wherein a single button may be employed for effecting various different functions including starting, accelerationand decelera tron.

governed means wherein two push button switches will provide for starting for inching and continuous operation, for speed regulation including acceleration and decelera tion and for stopping at will. 7

Various other objects and advantages of the invention will hereinafter ap ear.

The accompanying drawings il ustrate diagrammatically two of the-numerous ossible embodiments of theinvention an the same will now be described.

Figure 1 diagrammatically illustrates a. controller wherein-the speed regulation is eftectedby one means, and s 1 Fig. 2 diagrammatically illustrates a Sllpl lar controller wherein the speed regulation is effected by an alternative means.

Referring to Fig. 1, the controlleris illus trated as governing a compound wound motor 1 having an armature A, a series field F, and a shunt field f. The controller includes an electro-responsive main switch 2, an electromagnetic accelerating device 3, an electro-responsive relay switch 4 functioning with said device, a manual regulating device 5 and a push button control station 6. I The switch 2 is responsive to complete the motor circuit through a set of contacts 2 and when deincrgized completes through a set of contacts 2", a dynamic bralrin circuit for the motor includm a suitable rakin resistance r. The switc 2 also has a set 0 energli 'whlc A further object is 'to provide push button auxiliary contacts 2 for a purpose hereinafter set forth.

The'accelerating device 3 is of a conventional form, comprising a plurality of switch arms? to 13 to be progressively moved to circuit closing position by an operating solenoid ,15 and an additional switch arm 14 normally standing in circuit -closing osition and operable from such position fo lowing the movement of arm 12 to circuit closing position. The switch arms 7 to 12 control a starting resistance R for the motor and serve to remove said resistance from circuit in steps. The switch arm 13 controls the zing circuit of the relay switch 4 upon response, short circuits the starting resistanceR. The switch arm. 14 functions in conjunction with the speedregulating device 5, and, as will hereinafter a pear; serves to short circuit a part of t e same. 1

'-The regulatin device 5 is also of conventional form an comprises a pivoted arm cofiperating with a series of contacts 20 to control an armature resistance, R for the motor and with a series of contacts 21 to control a resistance R for'the shunt field circuit of the motor. The arm is movable in a clockwise direction to exclude the armature resistance R from circuit and to thereafter insert the field resistance R in circuit. During movement of the am over the but tons 20 said arm bridges segments 22 and23 ratenteu J un'el? 1918.

to complete the field circuit exclusive of the Y resistance R and during movement of the arm over the field resistance contacts 21, said arm enga a segment 24 to complete the armature circuit exclusive of the" resistance R. The arm of the speed regulatingdevice is adapted to be set in any desire position according to the ultimate speed desired and theabov'e mentioned switch arm 14.

la o c c c of the accelerating device serves in circuit closingposition to short circuit all of the field resistance which may be included in circuit-by, the setting of t e regulator arm.

.Thus as the switch 14 is maintained in (air-- cult closing position until after closure of lating device 5.

able stops whereby they may be set in diffcrent normal positions with consequent ariations in function upon de ression and release thereof. More specifical y the station includes a switch 25 biased to engage and bridge contacts 26 and restralnable by a pm 25 and stop 25" in the dotted line os tlon. Also, the station includes a switch 2 biased to en age and bridge contacts 28 and movable rom said biased position to engage and bridge contacts 29. This switch is also provided with a pin 27' and stop 27" to limttuts upward movement to the dotted line position at the same time leaving the same free to move into and out. of engagement with contacts 29.

Briefly set forth. the controller functions as follows:

llith certain settings of the push button switches depression and release of the switch '27 effects response and deenergization of main switch 2 for inching. Again, with other settings of the switches depression of switch 27 functions to energize main switch 2 for starting the motor for continued operation at slow speed and subject to stopping by depression of switch 25. Again, with the switches set, in the position illustrated, full depression of switch 27 effects energization of the switch 2 for starting while its return to normal position energizes solenoid 15' of the device 3 for accelerating the motor to a speed determined by the setting of the regu- Upon full operation of the accelerating device 3 the relay switch 4 is energized to short circuit the starting reslstance and upon response establishes a maintaining circuit for itself independent of the accelerating device. The accelerating device is then deiinergizable by depression of theswitch 27 to return the switch arm 14 to'circ uit closing position to thereby short circuit the field resi. tance R for deceleration of'the motor. :fter such deceleration the switch 27 may be locked in its dotted line. position for continued operation at reduced speed or may be returned to the position illustrated for re-acceleration' of the motor. 7 Referring now to the circuit connections, current. is supplied from lines L and L and the motor circuit may be traced as follows:

'ith the main switch 2 closed,and the accelerating device inert, circuit extends from line L by conductor 30'through the regulating resistance It. by conductor 31 through the motor armature. by conductor 32 through contacts 2" of switch 2, by conductor 33 through the series field F to line L. The shuntfield circuit of the motor extends from line L by conductor 30 to segment 23, and with the regulator arm in position illustrated. to segment 22, by conductor 34 through the shunt field winding f to conductor 33 and thence to line L as already traced. A parallel circuit for the shunt field winding f also extends from line L b conductor 36 through the shaft of the acce crating device to switch arm 14 and its cotiperating contacts, by conductor 37 to conductor 34 and through said field shunt winding. Thus it will be apparent that even with the regulator arm set in position (as shown in dotted lines) to include the field resistance, or a portion thereof. the entire field resistance would nevertheless be short circuited by the accelerating device so long as the same retains said arm 14 in circuit closing position. 'hen the accelerating device is operated then the motor circuit. temporarily extends from line L by conductor 36 through the device 3 and its resistance R by conductor 38 to t e regulator arm whereby the inclusion of-the regulating resistance R is dependent upon the position of said arm. \Vhen the resistance R is excluded from circuit and relay 4 is energized then said relay connects the regulator arm directly to line L by conductors 38, 39 and -10 thereby paralleling the accelerating device 3. Also if desired the relay might be employed to short circuit the regulating resistance as by connccting the a same to conductor 31 instead of to the regu lator arm.

Assume now that it is desired to inch the motor. This merely requires setting of the switch 25 in its dotted line. position and depression of switch 27 to engage and bridge contacts 29. Circuit. is thereby completed from line L by conductors 40 and 41 through the winding of main switch 2, by conductor 42 through contacts 29 of push button switch 27, by conductor 43 to line L. Switch 2 thereupon responds to close the motor circuit as above described through all of the armature're ulating resistance R irrespective of the setting of the regulator arm. Switch 2, however, is maintained energized only during depression of theswitch 27' and immedi ately upon release of the latter the former is de'c'nergized to disconnect the motor from circuit.

Assume now that it is desired to start the motor-and bring the same up to the speed provided for by setting of the regulator arm in the dotted lineposition. This merely requires setting of the push button switch 25 in its full line position, the depression of't-he switch 27 to bridge contacts 29 ayidthe release of said latter switch to 'iei ngage and bridge its contacts 28. De- 123 2 is thereby rendered independent of push button switch 27 for continued energization thereof and the return of said push button switch to engagement with contacts 28 completes the ener in device. T is circuit extends from line Liy conductors 36 and 48 through the solenoid winding of said device, by conductor 49 through contacts 28 of switch 27, by conductor 50 to conductor 47 and thence to line L, as already traced. Theaccelerating device is thereupon operated to establish a circuit for the motor armature through the resistance R, as above set forth, and to immediately remove said resistance R in a step-by-step manner. Following removal of the resistance R the arm 14 is moved to circuit opening position,thereb removing the short circuit from the lie] resistance R so that the portion of said resistance to the left of the regulator arm when in dotted line position is included in circuit with the shunt field winding. Finally the accelerating device, by movement of the arm 13 to circuit closing position, establishes an energizing circuit for the relay switch 4. This circuit may be traced from line L by conductor 36 through the shaft of device'3 to arm 13 and its cooperatin contacts, by conductor 51 through the win ing of switch 4, by conductor 52 to conductor 47 and thence to line L, as already traced. Relay 4 upon response completes circuit between the regulator arm and line L' as above described, and in additionestablishes for itself a maintaining circuit through auxiliary contacts 4. The motor will then continue to operate at the speed predetermined by the position of the regulator'arm, it, ofv

course, being understood that the speed may be varied at will said arm.

Assume now that the motor'is in operation with a weakened field and it is desired to decelerate the same from the control station. This may be accomplished by depression of the push button switch 27 to break circuit between contacts 28. The circuit of the solenoid 15 is thereby interrupted and this releases the device 3 which restores the arm 14 to circuit closing position. This in turn short circuits all of the field resistance which may happen to be included in the shunt field circuit and thereby slows downthemoton' If it is desired to continue the operation of the motor at its reduced speed then the switch 27 is locked in dotted line position. On the other hand, if it is desired to restore the motor to its previously established speed then the push button switch 27 is released for reengagement with the contacts 28 which recloscs the circuit of solenoid 1-1 with the results above described.

When the motor is in operation it may be stopped at will by depression of the zing circuit of the accelerat by manual adjustment of push button switch 25 to deenergize the main switch 2. Main switch 2 in opening interrupts the circuit of the operating solenoid of the accelerating rheostat and the energizing circuit of relay 4 whereby the parts are restored to proper position for restarting.

Referring now to Fig. 2, the same shows a motor 60, a main switch 61, an accelerating device 62, a regulating device 63, and a push button control station 64, all of which elements are identical with the corresponding elements of Fig. 1. Also, these elements function together in practically the same manner as in the controller of Fig. 1, but in this instance the control station functions to decelerate the motor through the control of a relay instead of through the control of the accelerating device.

The relay 65 has two sets of contacts 65' and 65", the former controlling the energiz ing circuit of the accelerating device and the latter completing a short circuit around the field resistance when said rela switch is deiinergiped. The energizing circuit of the relay is controlled by the push button switch 27 in a manner similar to that in which the operating solenoid of the accelerating device is controlled in Fig. 1. That isto say, after the switch 27 is depressed to energize the main switch 61 its reengagement with its up contacts completes the energizing circuit of relay 65. Relay 65 then responds to energize the operating solenoid of the accelerating device which upon full operation completes for itself a maintaining circuit through its contact arm 13 in parallel with the relay switch 65. The

relay switch may then be dciinergized by depression of push button switch 27 without 'efiecting the accelerating device and when deenergized shortcircuits the field resistance through its contacts 65. Obviously therefore, the relay will function under the direction of the central station precisely as the device 3 of Fig. 1 to decelerate and re-accelerate the controlled motor.

The power connections of Fig. 2 are precisely the same as those of Fig. 1 except. for the elimination of the connections controlled by the relayi'and'the addition of a connection fromline L by conductorthrough contacts 6520f. rela-v s itch 65, by conductor 71 tothe lefthand sideof the field resist ance R, said added connections providing the field resistance with the short circuit above discussed. i

The control circuits are also the same as those shown in Fig. 1 except for the circuits of the operating solenoid of the accelerating device and the winding of relay switch 65. The circuit of relay switch 65 extends from line L by conductors 70 and 73 through said winding, by conductor 74 through the up contacts of push button switch 27, and thence through the auxiliary contacts of main switch 61 to line L. From these connections it will be apparent that the relaying device to its arm 13 and its coiiperating' contact and thence by conductors 78 and 7 6 through said solenoid, as already traced. As will be apparent, this circuit is in parallel with contacts 65 whereby said relay may be deenergized without effecting the accelerating device, as above set forth.

From the two embodiments of the invention illustrated, the numerous advantages thereof will be at once a parent. For example, provision is made or an exceedingly flexible control with a minimum num er of control switches and with a minimum number of electro-responsive control devices. Again, provision is made for speed control from either the push button station or the regulator in a manner to avoid all complications and interference.

What I claim as new and desire to secure by Letters Patent is:

1. In a motor controller, in combination, clectro-responsive starting and accelerating means for the motor and a push button control switch therefor operable to effect startin and acceleration of the motor and also subsequently operable to efl'ect deceleration of the motor but only to a predetermined accelerated speed.

2. In 'a motor controller, incombination, clectro-responsive means to start and accelerate the motor and a push button control switch therefor operable tostart the motor and thereafter operable to accelerate and de celernte the same at will but subject to a predetermined decelerating limit established by said means upon response thereof.

3. In a motor controller, in combination, electro-responsive means to start and accelerute the motor and a push button control switch for said means operable to eflect starting and acceleration of the motor and subsequently operable to efi'cct deceleration of the motor, said means after response being partially independent of said switch to maintain at least a predetermined accelerated speed of the motor irrespective of subsequent operation of said switch.

1. In a motor controller, in combination,

electroresponsive means for starting and accelerating the motor, and a ush button control switch therefor operab e to effect starting and acceleration of the motor to a preestablished speed and thereafter operable to attest deceleration of the motor at will said means upon accelerating the motor establishing a pre-arranged limit for the deceleration liy said control switch.

5. n combination, a motor, electro-reresponsive means for completing the motor circuit and accelerating the motor by rogressively regulating the armature and eld circuits thereof, and .a push button control switch for said means operable to efi'ect starting and acceleration of the motor by both armature and field regulation, said switch being thereafter operable to efl'ect deceleration but only by field regulation of the motor.

6. In combination, a motor, electro-responsive means for completing the motor circuit and accelerating the motor by rogressively regulating the armature and eld circuits thereof and a push button control switch for said means operable to effect starting and acceleration of the motor by both armature' and field regulation, said switch bein thereafter operable to effect deceleration an said means upon acceleration of the motor functionin to' limit the degree of deceleration by sat? switch to that obtainable through -field regulation.

7. In combination, a motor, armature and field resistances for the motor, electro-responsive means for completing the motor circuit, for excludin said armature resistance and including said field resistance for acceleration of the,motor, and a push button switch controlling said means to effect starting, acceleration and deceleration of the motor, said means acting upon response thereof to maintain the continuity of the motor circuit and exclusion of said armature resistance irrespective of decelerating operation of said switch.

8. In a motor controller, in combination, eleetroresponsive means'for starting and accelerating the motor, a push button switch controlling said means, said switch being dcpressible to etfect starting of the motor, returnable to initial position to 'efi'ect acceleration of the motor and'subsequently depressible to effect deceleration of the motor and connections to maintain a predetermined accelerated's eed of the motor upon decelerating operation of said switch.

9. In a motor controller in combination, electro-responsive means or starting and accelerating the motor, a push button control switch for said means depressible to effect starting of the motor, returnable to initial position to efi'ect acceleration of the motor and subsequently depressible to decelerate the motor, said switch having means to lock the same in depressed position and connections rendering said accelerating means partially independent of said switch upon decelerating operation of the latter.

10. In a motor controller, in combination. electro-responsive startin and accelerating means for the motor, an a control switch therefor to effect starting, acceleration and deceleration of the motor, said means including a relay determining the degree of de celeration obtainable by said switch.

11. In a controller for electric motors. in combination, elcctro-responsive starting and accelerating means and a control switch therefor to efi'ect starting, acceleration and deceleration of the motor, said means including a relay functioning to render said means partially independent of said switch after acceleration of the motor.

12. In combination, a motor, armature and field resistances, electro-responsive means for progressively completing the motor circuit, excluding said armature resis tance and including said field resistance, and a switch controlling said means to effect starting, acceleration and deceleration of the motor, said means including a relay to determine the degree of deceleration obtainable by said switch.

13. In combination, a motor, armature and field resistances, electro-responsive means for progressively completing the motor circuit, excluding said armature resistance and including said field resistance and a switch controlling said means to efl'ect starting, acceleration and deceleration of the motor, said means including short circuiting means for said armature resistance to remain unaffected by decelerating operation of said switch.

14. In combination, a motor, armature and field resistances, electroresponsive means for progressively completing the motor circuit, excluding said armature resistance and including said field resistance and controlling means for said former means to effect starting, acceleration and deceleration of the motor, said former means including a relay controlling an alternative short circuit around one of said resistances whereby said governing means is effective to exclude said field resistance for deceleration but ineffective to reinclude said arma ture resistance.

15. In combination a motor, electro-responsive means controlling the continuity of the motor circuit, armature and field resistances for the motor, a common electroresponsive control device for said resistances and means controlling the aforesaid means to start, accelerate and decelerate the motor and a relay associated with said control de vice to govern alternative control circuits for one of said resistances whereby the decelerating action of said control means is limited to regulation of said field resistance.

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

ALBERT J. HORTON. Witnesses:

W. L. CULLY, W. E. Anoroxs.

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