US1163150A - Motor-controller. - Google Patents

Description

A. I. HORTON.

MOTOR CONTROLLER. APPLICATION FILED'SEPT. 12. 19m.

1,163,150. Patend 111111915.

P 31511. Y L' COLUMBIA PLANoukAm-x co.. WASHINGTON, D, c.

`UNITED sTATEs PATENT oEEicE.

, ALBERT J. HORTON, OE WHITE PLAINS, NEW YORK, AssIGNoR To THE OUTLER- HAMMER MFG. CO., 0F MILWAUKEE, CONSIN.

WISCONSIN, A CORPORATION OE WIsy MOTOR-CONTROLLER.

Specification of Letters Patent.

Patented Dec. *7, 1915.

To all whom t may concern Be it known that I, ALBERT J. HORTON, a citizen of the United States, residing at White Plains, inthe 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 accompanying drawing, forming a part of this specification.

This invention relates to improvements in circuit controllers. l

In my Patent No. 1,122,931, granted Dec. 29, 1914, there is disclosed a controller for motor driven printing presses and other ap-l paratus, wherein a two-push-button control station provides for inching, for continued operation at different speeds, and for stopping at will, and the present invention has among its Objects to provide a two-pushbutton station Operable to accomplish the foregoing and alsolockableto insure against starting.

Various other Objects and advantages of the invention will hereinafter appear.

One embodiment of the invention is illustrated in the accompanying drawing, which will now be described.

In the drawing, Figure 1 illustrates the controller diagrammatically and, Figs. 2 andl 3 illustrate in frontelevation and vertical section a mechanical. embodiment of the push-button station diagrammatically` illustrated in Fig. 1.

Referring to Fig. 1 the same shows an electric motor M', an electro-responsive switch S controlling the continuity of the` motor circuit, an electromagnetically oper ated rheostat R for accelerating the motor and a two-push-button control station S. for controllingv the switch S and rheostat R. The motor M has for the purpose of illustration been shown as having an armature A and a series field winding F, it being understood that any preferred type of motor may be employed. The switch S and rheostat R are both of conventional form. The switch S is provided with a normally open auxiliary switch 5 adapted to be closed upon response of said switch S. The rheostat R is provided with switch arms 6, 7 and 8 operable by a solenoid 9 to successively engage coperating stationary contacts to gradually exclude the resistance 1' from the motor ciradapted in one position to bridge contacts 18 I and in another position to bridge contacts 19.v As will hereinafter appear, engagement of the disk 17 with either set of its co- Operating contacts may be effected by operation of a push-button 20 and by an adjustment of said push-button, said disk may be locked out of engagement with contacts 18.

Referring nowjto Fig. 3, both push-button switches are inclosed in a casing 21, their stationary contacts being mounted upon an insulating base 22 lixed to the rear wall of said casing. In practice the two sets of contacts of each switch are arranged at right angles and in consequence Fig. 3 shows only one contact of each set. Referring speciically to switch 10 lthe push-button 16 thereof is reciprocably mounted in the front wall of the casing and has a stem 23 reciprocable in a bearing 24 on the rear wall of the casing. Both disks 12 and 13 are loosely mounted upon the stem 23 and are normally spread apart to engage their respective contacts by an interposed spring 25. The stem 23 also has mounted thereon and fixed thereto, to the rear of the disk 13, a collar 26 and iiiterposed between this collar and the rear wall ofthe casing is a second spring 27 of greater strength than the spring 25. The pushbutton 16 by an abutment with the contact disk 12 provides for disengaging said disk from its contacts 14 while the spring 27,

when permitted to force the collar 26 against the disk 13, provides for disengaging said disk from its contacts 15. The normal positions of the contact disks and the effect of depression of the push-button are governed by radial stops 28 and 29 on the push-button and a radial slot 30 through the front wall of the casing. The pins 28 and 29 are angularly disposed with respect to one another and are arranged at spaced points longitudiu nally of the push-button to lfunction as folholds the push-button in a semi-depressedl position, spacing the collar 26 from the disk 13 and thereby relieving said disk of the pressure of spring 27. Under such 'condi-V' tions the disks 12 and 13 are normally maintained in engagement with their respective contacts by the spreading spring subject to disengagement of disk 12 from its'contacts 11 by further depression of the pushbutton 16 and to return Vby the spring 25. Assume now that the push-button 16 be rotated to aline the pin 29 with the slot 30, then the push-button would be released for full outward movement and the spring 27 would force the collar 26 against the disk 13, thereby normally holding said disk out of engagement with contacts 15 subject to reengagement by depression of push-button 16. Again-assume that the push-button be ,held in semi-depressed position, as aforesaid, then the Vdisk 12 might be' locked out of engagement with its contacts 11by alineing pin 28 with slot 30, then depressing the push-button 16 to the i'ull extent and then turning said push-button until pin 28 lengages the rearface of the casing wall.

Referring now to switch 11 the push-button 20 thereof is provided with a stem 31 and is mounted in the casing similarly to switch 10. lts disk 17 isloose upon the stem 31 and is held by means of a spring 32 against a collar 33 fixed to said stem. The collar 33 in turn is vbiased outwardly by a spring 31 similar to the spring 27. Thus the' arrangement is such that the spring 31 tends to force the disk 17 into engagement with its contacts 18 subject to disengagement therefrom and engagement with its contacts 19 by depression of pushbutton 20. The pushbutton 2O has two radial spaced pins 35 and 36 coperating with two radial slots 37 and 38 in the front wall of the casing, as best illustrated in Fig. 2. As illustrated in Fig.

3, pin 36 engages the rear face of the casing wall holding the push-button in a semi-depressed position, thereby disengaging the disk 17 from its contacts 18. Under such conditions, with the pin 35 alined with the slot 37 the button 2O may be depressed to move the disk 17 into engagement with its contacts 19 and when the push-button is released the spring 31 restores said disk to the position illustrated. The disk 17 may, however, be freed Jfor engagement with contacts 18 by rotating the push-button 2O until the pins 35 and 36 both aline with the slots 38 and 37 respectively, whereupon the spring 31 will Jforce the push-button outwardly until the aforesaid engagement of said disk is effected. be depressed to move the disk 17 out of engagement with contacts 18 and into engage- Then the push-button 2O may ment withcontacts 19 subject to automatic` return of said disk by spring 31 into engagement with said contacts 18. Y

With the foregoingv operations of the push-button station iii-mind it will be observed that the following control of the motor may' be effected: Assume lirst that the switchesA are set to normally stand in the positions illustrated. The motor may be .startedl and accelerated by depression and ductor 12 through the contacts 17 and 19 of switch 11,by conductor 13 to line L. This causes response of switch S which completes the motor circuit from line L by conductor 11-through the resista-nce 1 of rheostat YR, by conductor 15 through the motor armature A and series ield winding F, by conductor 16 to line L. The motor is thus started and as soon as the switch 11 is released the solenoid 9 is energized to operate the rheostat R and thus exclude the resistance r from the motor circuit. The circuit of solenoid 9 may be traced from conductor 11 by conductor 17 through said solenoid, by conductor `18 through the contacts 17 and 18 of switch 11, by conductor 19 through the auxiliary switch 5 of main switch. S, by conductor 50 to line L. 0f course, release of the switch 11 to accelerate the motor interrupts the energizing circuit of the main switch but as soon as the main switch responds, it establishes its own maintaining circuit from conductor 12 through contacts 13 and 15 ofV switch 10, by conductor 51 through a suitable resistance r, by conductor 52 through auxiliary switch 5 and by conductor 50 to line L. Thus, as above stated, `depression and release of the switch 11 effects starting and acceleration of the motor. Assume now that it is desired to start the motor forceperation at slow speed, then prior to starting the switch 11 is adjusted to lock the disk 17 out of engagement with contacts 18. This still enables the motor to be started by depression of the push-button 20 as above described but upon release of the push-button limits the movement of the disk 17 tol prevent energization of the solenoid 9 of. the rheostat R.. For stopping the motor when started, as above described, the switch 10 is operated by depression of its push-button 16 to disengage disk 12 from contacts 11. Disk 12, and contacts 11 are included in the maintaining circuit of the switch S and hence upon separation denergize said switch and accordingly stop the motor. In the event that the solenoid 9 is energized when the motor is stopped then the switch S through its auxiliary switch 5 disconnects said solenoid scribed. Under these conditions it will be observed that inasmuch as the main switch S is deprived of its maintaining circuit the push-button 20 must be manually depressed as long as itis desired to maintain the motor in operation and that as soon as this button is released the main switch will be denergized and the motor immediately stopped.

Assume now that it is desired to inspect or repair the apparatus driven by the motor and to insure against unexpected startingv during such inspection or repair. This may be accomplished by adjustment of the switch 10 as above described to lock the contact disk 12 out of engagement with contacts 14. This disk and its contacts, as will be noted, are in the energizing circuit of the main switch S between said switch and the starting switch l1 so that obviously when the switch 10 is set as described the switch 11 will be ineffective to start the motor. In practice it is quite customary to provide a number of push-button stations whereby the motor may be controlled as above described from any one of the same, and in such cases it will be obvious that by connecting the contacts 14 and disk 12 of all stations in series in the energizing circuit of the main switch, lockout of any one of the disks 12 will render all stations temporarily ineffective for starting.

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

1. In a motor controller, the ycombination with electro-responsive starting means, of a control station therefor including two pushbutton switches one operable to eil'ect starting and the other operable to effect stopping, said latter switch being adapted to be set in a position to prevent starting by said former switch.

2. In aA motor controller, the combination with electro-responsive starting means, of a control station therefor including two push-button switches, one being depressible to effect energization of said means for starting and the other being adapted to be set in diiierent positions to render continued energization of said means either dependent upon or independent of continued depression of said first mentioned switch or to render said first mentioned switch ineffective to energize said means.

3. In a motor controller, the combination with electro-responsive starting means, of a control station therefor including two push- 'button switches, one depressible to energize said means for starting and the other depressibleto denergize said'means for stopping, said'latter switch being also adapted to ybe set in different positions to render continued energization of said means either independent oi' or dependent upon continued depression of said lfirst mentioned switch or to Vrender said first mentioned switch ineffective to energize said means.

4.. In a motor controller, the combination with electro-responsive starting means, of a ycontrol station therefor including two push-button switches, one depressible to energize said means for starting and the other being depressible to denergize said means and lockable in depressed position to render said first mentioned means ineiiective for starting.

' 5. In a motor controller, the combination with electro-responsive starting means, of two push-button control switches therefor jointly controlling the energizing circuit of said means whereby said means may be energized by depression of one of said switches when the other is in a predetermined position, said latter switch being adapted to beset in a position to render said former switch ineffective to energize said means.

6. In a motor controller, the combination with electro-responsive starting means havu ing an energizing circuit and a maintaining circuit, of two push-button switches jointly controlling the energizing circuit of said means whereby said circuit may be closed upon depression of one when the other is in a predetermined position, said latter switch also controlling said maintaining circuit and being adapted to be set in position to render continued energization of said means dependent upon or independent of continued depression of said rst mentioned switch or to render said first mentioned switch ineilective to energize said means.

7. In a motor controller, the combination with electro-responsive starting means having an energizing circuit and a maintaining circuit, of a push-button operated switch controlling both of said circuits, said switch being depressible to open said energizing circuit and having means to releasably lock `the same iny depressed position.

adapted to be set in one position to inten-5v and interrupt said maintaining cirouinorV in a third( position to complete its respeetive .portion-of both of said Circuits.

10. In a motor controller, in Combination, eleotroresponsive starting means having an energizing Circuit and a maintaining circuit, of a push-button operated switch havinga movable 'Contact in said maintaining circuit and a second movable Contact common to both Vsaid energizing and maintaining circuits, said Contacts being operable by a common push-button and being adapted to be set in different positions to interrupt bothoirouits or to interrupt only said maintaining circuit.

11. In a motor controller, in combination, electro-responsive starting means having an energizing circuit and a maintaining oirouit, of a push-button operated Switch having a movable Contact in said maintaining circuit and a second movable Contact 'oommonto both said Venergizing and vmaintain- Copies of this patent may be obtained fior five cents eah, py i I Washington, D, C.

ngf Qrenits, Seid @entente being Operable by .a @emmen pnsh-bnttenand beingfednpted to be set in dierent positions to interrupt both eirenits 0r te interrupt only said maintaining circuit or to complete their respective portions of both oirouits.

l2-l In arnotor eQntrO11er.,- the Combinationwith eletro-responsive Starting means having ail-energizing circuit and a maintaining Circuit, O n pnshrbntten switch Controlling beth of Said Circuits andY being adapted t0 be set in different positions to complete its respeetive portion of both of said circuits or .interrupt'either of said circuits and a second pnsh-,button switch depressible to energize saidY means subject to control by Seid irst mentioned swteh- In Witnesswhereof,V I have hereunto subscribed Iny name in the presence of two Witnesses.VV

ALBERT J. Hon-TON.

Witnesses W L- GULLY, W. C. WINTERROTH.

adcplrepssing the t Commissioner of Batents.

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