US916843A - Controller. - Google Patents

Description

H. W. CHENEY.

CONTROLLER,

APPLICATION FILED Nov, 1, 1907.

Patented Mar. 30, 1909.

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H. W. wCHENEY.

CONTROLLER. v APPLIOATION FILED NOV. 1, 1907.

916,843. I Patented Mar. 30, 1909.

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H. W. CHENEY.

CONTROLLER. 7

APPLICATION FILED NOV. 1, 1907.

Patented Mar. 30, 1909.

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' *HERBERT w. CHENEY, or nonwoon, OHIO, ASSIGNOR TO ALLIS-OHALMER S COMPANY, 'A l CORPORATION OF NEW JERSEY, AND THE BULLOCK ELECTRIC MANUFACTURING'COll/L' PAN Y, A CORPORATION OF OHIO.

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s ecification of Letters meat- Patented. March so, 1909.

Appricatipn filed. November 1, 1907. I Serial No. 400,209. y

To aZl 'whom it may concern:

! troller forward from running'position to olf Belt known that I, HERBERT 'YV. CHENEY, 1 position in case abnormal conditions, such citizen of the United States; residing at Norwood', in the'county of Hamilton and State of Ohio, have invented certainncw and .useful Improvements in Controllers, of which the followmg is a'tull, clear, and exact specification.

My invention relates to starting controllers for electric motors," and more particularly to fool-proof potential starters for polyphase induction motors.

In operating starting types of .1notors,'especia.ly potential starters for induction motors, it is often undesirable that the controller be moved backward from a running to a starting position. To this end controllers have been designed which move directlyfror'n the running to the off position without passing through the starting posi- 'ti'ons' =In my co-pending application Serial No. 264,162, filed'June 7, 1905, there is described a potential starter in which means are pro-;

vvided for preventingthe controller from bebackward from a rurming to a starting position or from an off position- 'directly'to a running position, while allowing a backward movementofthe controller from any starting position. I It is possible however for controllers such as are there shown toj'bleft-[irr-a starting position indefinitely instead of being moved to running position as soon as the motor has gained sufficient speed!" As the various windings which are connected in circuit when the controller is in a starting position are'not proportioned to carry current continuously but only for a brief period during starting, the result of 'l'eaving'the c-ontroller 'iiulefinitely in a startv mgposit on maybe to cause such windings to be-burned out. t

111 my prior patent, No. 864-5446;- dated Aug. 27,1907; there isdQScribed an arrangement in which it is "impossible for an operator to leave thccontroller in a starting, position, arrangements being provided for automaticallv moving'the controlier intc'icu'arai to oil position if it is 'releascd hvtheopera-tea while it is in a starting position. it may also sometimesflbc (lliSi l'iLlF-l'. to has-:3- means whereby with such a conirnlizj-r shown in z said prior zmplicatioi'r-and-patent means are prov1ded-for automatically moving the com.

devices for some v connections.

as no voltage or an overload, arise.

' It is the object of my'present invention to provide such means.

The novel features .of my invention will ap pear from the description and drawin s and will be particularly pointed out in the claims.-

Figure .1 i's-a side elevation of a controller embodying my invention, the casing and some of the operative arts being shown in section Fig. 2 is an en elevation of the'controller of Fig. 1, the casin'g and dash-pot in the upper partof the figure being in section and t e controller beniginofi position; Figs. 3 and iars views somewhat similar to Fig. 2,

but with the controller .in starting and 'run.

ning positions respectively and with more parts 111'. section; Figs. 5 and 6. are details of the notched disks on the handle" shaft, to-

gether with their 006 erating dogs'and levers;

and-Fig.7 shows a iagram of the electrical the starting controller forth in my aforesaid co-pending application. p,

The three-phase induction motoril'i is supplied with current from threehase mains f, gand 72,. v in starting position the auto-transformer windings 12 and. '12, which are within the casing'13, are each connected between two of the mains, the main It being connected to one terminal of each winding. Y One of When the-contro er isthe terminals of motor M is connected to those two terminals of the windings 12 and 12" which are connected in common to the" main and the. other two motor terminals; areconnected to intermediategpoints on the auto-transformer windings U12 and. 152* respectively. 'l. he \\'indin;';S;-12 and 12 thus constitute 1n efiect a single -V-con nected middle terminal'of the motor being connected to the middle of the V. Vs-hen the auto-transfornier, themain ,71- and the controller is in ru niing position the'aut.o

transformer windings 12 and '12 are entirely disconnected and the motor terminals. are

connected to the. three mains respectively-h 1n the controller shown iherc is but one sition R. as shown in Fig. 4. As the ssh starting position between off and running ygisitions, but it is obvious that any desired n ber of such starting positions may be em toyed.

lh normal operation 6f thecontroller is contiiitiausly in the same direction, a movement through 180 constituting a complete operation. \Qihe controller drum 14, which is immersed in oil in the tank 15,,is moved' by the o erating handle 16 through the gear whee s 17, 18 and 19. The two opposite halves of the controller drumare identical in structure and each half coiperates in turn with each of two sets of contact fingers during successive operations of the controller, the sets of contact fin ers being on opposite sides of the drum anti arranged to simultaneously co-act with the two halves of the drum respectively.

Fixed on the shaft 20, which carries the gear. 19 and handle 16, are two notched disks 21 and 22. Loosely mounted on the same shaft in juxtaposition tothe disks 21 and 22 respectively are arms 23 and 24. Carried at the ends of the arms 23 and 24 are pawls 25 and 26 respectively, said pawls being spring-pressed inwardly against the edges of the disks 21 and 22 respectively. Two links 27 and 28 connect the ends of the arms 23 and 24 to the free end of an arm 29. l'he arm 23 isbias'ed in a' counterclockwise direction, as by 'means of the spiral spring 30;

When the controller is in off position 0 the parts are as shown inl igs. 1, 2, 5 and 6. By moving the handle 16 substantially 60 in a clockwise direction, the starting position S illustrated in Fig. 3, is reached, and the motor is connected to the supply circuit through the auto-transformer windings 12 and 12 T he starting position may be accentuated if desired by means of a plunger 31 which (:05 )erates with the notch disk the latter being preferably integral with the gear 19. As the controller is thus moved from the off to. the starting position, the disk 21 by its engagement with the pawl 25 carries the arm 23 in a clockwise direction with it, winding up the spring 30,

and through the links 27 and 28 and the arm 29 also moves the arm 24 in a counterclockwise direction. If the operator releases his grasp. on the handle 16 with the controller in this position, the spring 30,- unwinding, carries thecontrollerback to the off I osition, shown in'Fig. 2. hle for the controller to-be left in the starting position without attention.

If the operator does not release his grasp on the handle 16 while the controller is in starting position, but when the motor has gained sufficient speed moves sald handle substantially 60 farther in a clockwise direction, the controileris brought to run nmagtpgd Thus it is impossi' is thus moved, the disk 21 through its engagement with the do 25 carries the arm 23 farther in a clockwise t irection, further winding the spring 30, and also through the links I 27 and 28 and the arm 29 forces the arm 24 farther in a counter-clockwise direction. As

the parts approach the running position, the 'dog 26 drops nto one of the notches of the disk 22 and slightly later the cam 33 forces the dog 25 out of the notch in the disk 21 with which it has been in engagement. Backward movement from this running position is prevented by therdog 26- and the tooth of the disk 22. For further insuring the prevention of such backward movement from this position, the notches of the disk 32 may be'so shaped that because of the engagement of the plunger-31 with said disk such backward movement is impossible.

" With the controller in the running position the solenoid 34 is energized, being connected in one or part1 in each of more than one of the motor lea s. With normal current thissolenoid lifts the smaller core.35 to bring the latch 36 into position to prevent clockwise movement of the arm 24, which would occur shown the operatorfmayrelease his'grasp on the handle 16 at this time and leave the motor for its normal operation.

In case thesupply of current fails the solenoid 34 acts as a no voltage release mag-. net to allow the core 35 to drop under'the combined influence of gravity and the spring 37 to move the latch 36 out of the path of the arm 24. This permits the spring 30, through the arm 23', links 27 and 2S and arm '29 to move said arm 24 back to the position in which it is shown in Fig. 1, in this movement carrying the disk 22, and through it the controller proper, in a clockwise direction to the off position, this off position being 180 from theoff position from, which the start was made.

If with the controller in the running position an overload on, the motor occurs, the strength of the solenoid 34 is increased and said solenoid pulls down the core 38. T he core 38, descending, forces the smaller core 35 out of the solenoid'34, and in the same manner as above described for the no "oltage condition releases the latch 36 to allow the spring 30 to move the controller forward to off position. The solenoid 34 and itsiron casing 39 are so designed that the reluctance of its magnetic circuit is decreased by the descent of its core 38 and the iron plate 40 carried by said core, although the core 35 is forc'ed outward. The extent of the overload necessary to trip the controller may be determined by adjusting the spring 41, while the action of the overload release is controlled by an adjustab e time limit device 42,

. the running-position ing' located at any which is biased backward to off position and biased for-- such as a dash-pot provided with a pet-cock, so that momentary overloads will not trip the controller.

When with the controller in running position it is desired to st the controlled motor, the operator moves ilie handle 16 approximately 60 still farther in aclockwise direction, thus bringing the controller drum agaim to off position and breaking all circuits.

.However, in order to prevent the dog 26 from y hammer-blow upon a tooth of the disk 22 after the circuit is broken, a cam 43 is provided for forcing-the latch 36 out of engagement with the arm 24as soon as clockwise movement of the arm 16 'from has been startedsl' Instead of or besides using this device, a boiler s ring 44 may be provided for receiving the s ock of any hammer-blow, such spring be desired point, as above the strikinga heav 29. I Then the controller is thus brought to running position, whether manually or anto. matically, the dog 25 drops into the other notch of the disk 21 so that the controller may again be moved forward from oil position, and the action above described be repeated. hi'any modifications may be made in the particular arrangement here shown and described and the spirit of the invention still be retained. A ll such modifications I aim to cover in the following claims.

What I claim as new is 1. A controller bias-ml bacha'ard to off position when in any starting; position and biased forward to oil position when in running position.

2. A-controller the movable member of which is biased backward to oil position when in an starting position and biased forward to 0 position when in running; position, and means for normally locking said movable member against forward'movernent when inrunning position.

3. A controller biased backward to off position when in any starting position and biased forward to oil position when inrunnin position, means for noinally locking said controller against forward in running osition, and means for releasing said controller from said locking means.

i. A controller biased backward to off position when in starting position and biased forward to off position when'in running position, means for'normally locking said controller against forward movement when in running pos1t1on,,,,and means for manually releasing said control means.

5. A controller the movable member 'of position ler from said locking when in any starting ward to otf'posnion when in running position, means for normally lockingsaid movl l l when in any starting able member against forward movement when it is in running position, and means responsive to novoltage for releasing sai movable member from said locking means. 6. A controller the movable member of which is biased backward to oil position position and biased foren in running position, means for normally locking said movabie member against forward movement when it is in running position, and means responsive to an overload for role-a rig said movable member from said locking means. 1;;-

7. A- controller biased backward to off position when in any starting; position and biased forward to oil position when in running position, means for normally-locking said controller against forward movement when in running position, and means responsive to no voltage or overload for releasing said locking means.

8. A controller biased backward to off po-- sition when in startingposition and biased forward to off position when in running position, means for norinaliy locking said conward to off position w 'troller against forward movement when in running position, means responsive to an overload for releasing said locking means, and a time limit device for controlling said releasing means.

9. A controller biased backward to oil position when in starting position and biased forward to oil positionwhen in running position, means for normallj locking said controller against forward movement hen in running position, means responsive either to no voltage or overload for releasing said locking means, and a time limit device for controlling the release on overload.

10. A controller biased backward to oil position when in any starting position and when in' running position biased forward to off position upon abnormal conditions in the circuit.

11. A controller biased in. one direction when on one side of running position and in another direction when on the other side of running position. f

12. A controller for electric motors comrising fixed and mov al'zle contacts, the latter icing biased backward to oil position when in an starting position, and biased fornard to of position when abnornml ronditions arise while it is in running position.

13. In a controller, Contact fingers. a rotatable drum cooperating therewith, said drum having ofifstartingfand runnin positions, and a spring which tends to move said drum backward to oil position when the latter is in any starting osition and tends to move said drum forward to oil position n hen the latter is beyond running position.

14. Ina controller,-contact fingers. a rotatable. drum cooperating therewith, said drum posit low,

and .a spring which tends to move said drum I backward to off positionwhen the latter is in any start-mg position and tends to move said drpm forward to of? position when the latter is in running position,

15. In a controller, contact fingers, a rotatable drum cooperating therewith, said drum having off, starting and runnin ositions, asprmg which tends to move'said rum backward to off position when the latter is in anv starting position and tends to' move said drum forward to off position when the latter 1s m running position and there "is an overload on the circuit.

l6. a controller, contact fingers, a rotatable drum cooperating therewith, said drum having oil', starting and running positions, and a spring which tends to move said drumb'aekward to ofiposition when the latter is in any starting position, and tends to move said drum forward to off position when the latter is in running osition and no voltage conditions arise in the circuit.

17. A controller biased backwaruto off position when in starting position, lockedagamstbackward movement when run-' nmg'position, and biased forward to off position when while in running position abnormal conditions arise.

l8. controller for electric motors com-' prising -fixed and movable members, and a spring which tends to move the movable member backward to off position when it is in any starting position and forward to offposit'ion when it is beyond running position.

19. In a controller, contact fingers, a rota-- table contact-carrying member cooperating therewith, said member having off, starting and running positions, and means whereby said member is biased to oii position in o posite directions when on opposite sides 0 the runm'ng' sition.

20. iizontroller for electric motors comprising'a rotatable drum, contact fingers cooperat' therewith, means for preventing backwar movement of the drum from the off or the running osition, and meanswhich tend to move the rum backward to 013 osition when the latter is in any position trom which it may, be moved backward and forward from the running position to the. off position upon the occurrence of abnormal conditions.

21. A controller for electric motors comprising a rotatable drum, contact fingers cooperating therewith, means for preventing backward movement of thedrum from the off or the running osition, and means which tend to move the rum backward to off 'osition when the latter is in any position rom which it may be moved backward and forward from the running position to the off position when there is an overload on the controlled motor.

22. A controller for electric motors comprising a rotatable drum, contact fingers cooperating therewith, means for preventing backward movement of the drum from the off or the running osition, and means which tend to move the rum backward to off osition when the latter is in any position rom which it may be moved backward and forward from the running position to the off position upon a no voltage condition.

23. A controller for-electric motors so constructed and arranged that it will automatning position.

25. In a controller, contact fingers, a rotatable contact-carrying member cooperating therewith, said member having ofi, starting and running positions, a spring which tends to move said member backward to off position when the latter is in any starting position, but moves said member forward to off position when the latter is in a running position and there is an overload on the circuit.

26. A controller which when many starting' posit-ion tends to move to 03 position without passing through running position and when in a running position tends to move to off position without passing through starting position.

27. A controller biased in one direction when on one side of running position and in another direction when in running position or on the other side thereof; 28;. A controller which when in a starting position is biased to one open-circuitin position and when in a running position is lased to another open-circuiting position.

29. A controller having a plurality of off positions, the movable member of said controller being biased toward one of said off positions when one operative position, and biased toward another of said off positions when in another 0 erative osition in the same operation of the contro ler.

30. A controller' having' a plurality of off positions, and means whereb the movable member of said controller wi be moved automatically to one of said off positions when released by the operator on oneside of a run ning position and automatically moved to another of said o5 positions when releasedby the operator on the other side of such running position. v

31. A controller having a plurahty of. off

positions, and means whereby the movable member of said controller will be moved. automatically to one of said off positions when released bythe operator on one side of a running position and automatically moved to another of said off positions when released by the operator on the other side of such running position and automatically moved to the latter of said oii positionswhcn abnormal conditions arise while it is released in such running position.

32.. A controller for electric motors arranged to be always normally movedin the same direction, and means whereby said controller will be automatically moved to off position if'released by the operator at any oint oneither side of running position, anr will also be moved to off position if while released by the operator in running position abnormal conditions in the circuit occur.

' 33. A controller for electric motors arranged to be always normally moved in the same direction, and means whereby said controller will be automatically moved to off position if released by the operator at any point on either side of running position.

34. In a controller, the combination. of fixed and movable members, a spring which tends to move said movable member backward to off position when it is in a starting position and forward to off osition when it is in a running positlon, an means for normally preventing said'spring from acting on said movable member when the latter 1s in running position.

35; ln, a controller, the combination of fixed and movable members, a spring which tends to move said movable member backward to off position when it is in a starting position, and forward to off position when it 18 m a runn ng pos1t1on,, an';l means ior preventing sald spring from acting on said movable member when the latter is in running position unless abnormal conditions arise in the circuit controlled by such controller.

In testimony whereof I affix my signature, in the presence of two Witnesses.

HERBERT W. CHENEY.

Witnesses:

GEO. B. SoHLEY FRED J'. KINsEY

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