US792658A - Motor-starter. - Google Patents

Description

N0./792.658. PATENTED JUNE 20, 1905.

A. J. HORTON.

MOTOR STARTER.

APPLIOATION FILED NOV. 2, 1904.

2 SHEETS-SHEET l.

iiiiiiiiiiiiiiiiiiiiiiifiiiliiiiiiiiiiiiiiiii 1 No. 792,658. PATENTED JUNE 20, 1905. A. J. HORTON.

MOTOR STARTER.

APPLICATION FILED NOV. 2, 1904.

2 SHEETSSHEET 2 No. 792,658. Patented June 20, 1905'.

UNITED STATES PATENT OFFICE.

ALBERT J. HORTON, OF VHITEPLAINS, NETV YORK, ASSIGNOR TO THE CUTLER-HAMMER MANUFACTURING COMPANY, OF MILVAUKEE, 1S- CONSIN, A CORPORATION OF WISCONSIN.

MOTOR-STARTER.

SPECIFICATION forming part of Letters Patent No. 792,658, dated June 20, 1905.

Application filed November 2, 1904. Serial No. 281,130.

To whom it y con/067%: ure 1 is a front elevation of my device. Fig.

Beitknown thatLALBER'rJ. HoR'roN,aciti- 2 is a side elevation thereof, and Fig. 3 is a 5 zen of the United States, residing at VVhitediagrammatic view of the circuit arrangeplains, in the county of VVestchester and State ments.

of New York, have invented new and useful In the preferred embodiment of my inven Improvementsin lVIotor-Starters, of whichthe tion upon a suitable insulating-base 1 are following is afull, clear, concise, and exact demounted contacts 2, which extend through the 55 scription, reference being had to the accombase and are connected by the concluctors3with panying drawings, forming a part of this the resistance 4:, carried in the starting-box 1o specification. 5, to which the base 1 is secured. The first My invention relates to improvements in three of these contacts, however, are not conmotor-starters, and more particularly to imnected with the resistance and are therefore 60 provements in that type known as comdead. A second set of contacts 6, secured pound starters, which are arranged to conupon the base 1, are connected with the re- [5 trol the resistance both in the armature-cirsistance 7, wound upon a supporting-plate 8, cuit and in the shunt-field circuit of a motor. which is preferably made of porcelain or In compound motor-starters which have other insulating material. A third contact 5 been heretofore constructed it has been pos- 8, preferably in the form of a brass sector, is sible for the operator to hold the starter-lecarried upon the front face of the base 1.

2o verin an intermediate position and then move This contact, it will be noted, is of such a the field contact-lever to insert resistance in length that when the brushes 9 and are the field and in this manner weaken the field moved to the extreme right the brush 10 will 7 of the motor, while some resistance still renot be in contactwith the same. mains in the armature-circuit. Also in appa- A suitable brush 9 is mounted upon a lever ratusas previously constructed it requires the 11 and is adapted to sweep over and make handling by the operator of two distinct parts contact with the contacts 6. A second brush of the controllernamely, a starting-lever for 10 is also carried upon thelever ll and is adapt- 7 5 starting the motor and bringing it to speed ed to sweep over and make contact with the and a controlling-lever for the field resistsector 8. The lever 11is pivoted upon asuit- 3o ance. able support 12, secured to the front plate 1,

It is the object of the present invention to and is provided with a spring 13 for returnovercome the above and other objections and ing the same to its initial position. An ar- 80 construct a starter in which means are promature member l i is mounted upon the up vided whereby until the resistance in the arper side of the lever 11, and said lever also mature-circuit is entirely removed it will he carries an upwardly-projecting stop 15, adaptimpossible to insert resistance in the field-cired to be engaged by a downwardly-projecting cuit to Weaken the same. By this arrangestop 16, carried upon the lever 17. The le- 5 ment it is unnecessary to instruct the operator ver 17 is pivoted upon the same support as is how to start the machine, and there is no danthe lever 11 and carries a brush 18, adapted 4o ger of injury to the different parts bya careto sweep over and make contact with the conless operator. tacts 2, a handle 19 being secured to said le- Another object of my invention is to prover for operating the same. A shoulder 17 9 vide a device in which the movement of one is formed upon the hub of this lever and is lever only is necessary and one which shall adapted to engage an upwardly-projecting be mechanically better and cheaper to operpin 11, formed upon the lever 11.

ate than the devices heretofore constructed. A retaining-magnet 20 is mounted upon the Inthe accompanyingdrawings, showing the right-hand side of the base-plate l and when preferred embodiment of my invention, Figenergized is adapted to excite the fields 21,

between Which it is supported, and attract the armature 14, mounted upon the lever 11, holding said lever in a position at the extreme right or on position. Suitable bindingposts 22, 23, and 23 are provided upon the face of the base-plate for making the proper connection with the line-wires and the armature and shunt-field wires.

I have diagrammatically illustrated the circuit connections for my motor-starter in Fig. 3, and in said figure it will be noted that the armature 25 is connected by conductor 26 with the lastcontact of the series of contacts 6, which control the resistance 7, the opposite'side of said armature being connected by conductor 27 through the switch 28 with one side 29 of the line. The field 30 of the motor is connected by conductor 31 with thelast segment of the series of contacts 2, to which is connected the resistance 4:. A conductor 32 also connects the last segment of the series of contacts 2 with the sector 8, and the first two segments of the contacts 6 and 2 are connected by a suitable conductor 33. The Winding of the magnet 20 is connected by conductor 34 with the conductor 27 through the resistance 35. The opposite terminal of this magnet is connected by conductor 36 with the first segment of the contacts 6. It will thus be noted that the retaining-magnet is connected across the line; but I do not wish to limit myself to this connection, as the same may be readily connected in the field-circuit. The hub of the levers 17 and 11 is connected with the opposite main 37 through the switch 28 by conductor 38.

In operation the main switch 28 is closed and the lever 17 is moved to the right, carrying with it the lever 11, due to the engagement of the stops on said levers, and the brushes 9 and 10 sweep over and make contact with the contacts 6 and the sector 8. When the two levers have been moved forward to start the motor and the brush 9 has made contact with the first of the segments 6, the brush 18, having made contact with the first of the segments 2, circuit may be traced as follows: from the line 37, through con-- ductor 38 to the hub of the two levers, thence through the lever 11 and brush 9 to the first contact of the first segment of the contacts 6, through armature resistance 7, conductor 26, armature 25 of the motor, conductor 27, and back to the opposite side 29 of the main. At the same time a circuit will also be closed from the brush 10, sector 8, conductors 32 and 31, through the field 30 and conductors 39 27, through the switch 28, back to the opposite side 29 of the line. The connection 32 between the segment 8 and the last segment of the contacts 2 short-circuits all of the field resistance 4, sothat no current willflow through the lever 17 and its brush 18. As the levers are moved to the right they will gradually cut out the armature starting resistance and bring the motor to full speed, and when the levers reach the extreme righthand position the lever 11 will be held by the magnet 20 in this position, circuit for the magnet being traced as follows: lever 11, contacts 6, conductor 36, magnet 20, resistance 35, back by the way of the conductor 27 to theopposite main 29. When the levers have been moved to the extreme right, the contact between the brush 10 and the segment 8 is broken, thereby throwing into circuit whatever field resistance may be included by the field-resistance lever, which at this time, however, amounts to zero, as the field-resistance lever is also in the extreme right-hand position. The circuit through the field may now be traced as follows: from the main 37, through conductor 38, lever 17, brush 18, the last segment of the contacts 2, conductor 31, through the field 30, and by conductors 39 and 27 to the opposite side 29 of the main. As the lever 17 is moved backward, part or all of the shunt-field resistance 4 will be included in the field-circuit, thus weakening the field and increasing the speed of the motor. When the lever 17 is moved back as far as it will go, passing entirely off the first segment of the contacts 2, the armature-starting resistance will be inserted in series with the shunt-field resistance, and the motor-field current will flow from the lever 11 t0 the last segment of the contacts 6, through the armaturestarting resistance 7 to the first of the series of contacts 6, thence by conductor 33 through the field-regulating resistance 4, by conductor 31 through the shunt-field 30 of the motor,

by conductor 27 and switch 28 back to the opposite side 29 of the main line.

If for any cause after the motor has been brought up to speed or while it is being brought up to speed both levers are returned to their off position, circuit through both levers to the field will be broken; but the field will remain connected through the resistance to the armature, so that discharge of the field will always be broken by the motor-armature. With both levers in the off position, the circuit for the shunt-field and motor-armatu re will be from one side of the armature 25, through the conductor 26, armature-starting resistance 7, conductor 33, field-regulating resistance 4, conductor 31, through the motorfield 30, and by conductor'39-to the other side of the motor-armature.

When the lever 17 has been moved to the left to a position where it engages the first of the contacts 2, which is connected to the field resistance, all the field resistance will be inserted in the field-circuit of the motor and will be running at its highest speed. If the lever 17 be now moved farther to the left to its full off position, the shoulder 17 will engage the projection 15 on the lever 11, and

the same will be forcibly removed from en-' gagement with the retaining-magnet 20, per:

mitting the spring 13 to move it to the left to the full ofi position and bring the motor to a stop.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In combination, a movable member, a resistance controlled thereby, a second movable member, a resistance controlled by the latter member, means operatively connecting the former member to the latter member to move the latter member with the former member in one direction while allowing the first member to move independently of said former member in the opposite direction.

2. In combination, a movable member, a resistance controlled thereby, another movable member, a resistance controlled by the latter member, means operatively connecting said. members, said latter member being movable with the former member in one direction and the former member being movable independently of the latter member in the opposite direction.

3. In combination, a movable member, a resistance controlled thereby, a second movable member, a resistance controlled by the latter member, and means rendering the former member inefi'ective in controlling the resistance thereof while the latter member occupies predetermined positions.

4:. In combination, a movable member, a resistance controlled thereby, a second movable member, a resistance controlled by the latter member, means operatively connecting said members, said latter member being movable with the former member in one direction and the former member being movable independently of the latter member in the opposite direction, and a magnet for retaining the latter member in a predetermined position.

5. In combination, a movable member, asec- 0nd movable member, means operatively connecting said members, the latter member being movable with the former in one direction and the former member being movable independently of the latter member in the opposite direction, means for rendering the former member ineffective in controlling its resistance, while the latter member occupies certain positions, and a magnet for retaining the latter member in a predetermined position.

6. In combination, a movable member, a resistance controlled thereby, a second movable member, a resistance controlled by the latter member, means operatively connecting said members, said latter member being movable with the former member in one direction and the former member being movable independently of the latter member in the opposite direction, means tending to keep the latter member in the initial position thereof, and a magnet for holding the latter member in a predetermined position.

'7. In combination, a movable member, a resistance controlled thereby, a second movable member, a resistance controlled by the latter member, means operatively connecting said members, said latter member being movable with the former member in one direction and said former member being movable independently of the other member in the opposite direction, means rendering said former member ineffective in controlling its resistance while the latter member occupies predetermined positions, and a magnet for retaining the latter member in a predetermined position.

8. In combination, a movablemem her, a resistance controlled thereby, asecond movable member, a resistance controlled by the latter member, means operatively connecting said members to cause the latter member to move with the former member in one direction, the former member being movable independently of the latter member in the opposite direction, said latter member being adapted to decrease the resistance controlled thereby when it is moved with the former member and. the former member being adapted to control its correlated resistance when it is moved independently of the latter member.

9. In combination, a supply-circuit, a motor-armature connected to said supply-circuit, a motor-field connected to said supply-circuit, a resistance connected in said field-circuit, a second resistance connected in said armaturecircuit, a movable member for controlling said field-circuit and a second movable member for controlling said armature-circuit, said second member movable in one direction to remove the resistance controlled thereby from the armature-circuit, and said first member movable in an opposite direction to insert the resistance controlled thereby in the field-circuit.

10. In combination, a supply'circuit, a motor-armature connected in said circuit, a motor-field connected in said circuit, a resistance arranged in said field-circuit, a second resistance arranged in said armature-oircuit, a movable member controlling said field resistance, a second movable member controlling said armature resistance, said second member movable in one direction to remove said armature resistance from circuit and said first member movable in an opposite direction to insert said field resistance in circuit, connection between said members whereby they will move in one direction together and said first movable element may be moved in an opposite direction independently of the second, and means for rendering said first movable member ineffective when the two members are moved together.

11. In combination, a supply-circuit, a motor-armature connected in said sup pl y-circuit, a motor-field connected in said supply-circuit, a resistance connected in said field-circuit, a second resistance connected in said armaturecircuit, a movable member movable in one direction to remove said field resistance from circuit, a second movable member movable in an opposite direction to remove said armature resistance from circuit, and a magnet connected in said supply-circuit for retaining said second movable member in a predetermined position.

12. In combination. a supply-circuit, a motor-armature connected in said supply-circuit,

a resistance connected in said field-circuit, a

second resistance connected in said armaturecircuit, a movable member for controlling said field resistance and a second movable member for controlling said armature resistance, said second member movable in one direction to remove said armature resistance from circuit and said first member movable in an opposite direction to insert said field resistance in circuit, means tending to keep said second member in its initial position, and a magnet for retaining said second member in a predetermined position.

13. In combination, a supply-circuit, a motor-armature connected in said supply-circuit, a motor-field connected in said supply-circuit, a resistance connected in said field-circuit, a second resistance connected in said armaturecircuit, a movable member for controlling said field resistance, a second movable member for controlling said armature resistance, said second member movable in one direction to remove said armature resistance from circuit, and said first member movable in an opposite direction to insert said field resistance in circuit,a spring tending to keep said second member in its initial position, and a magnet for retaining said second member in a predetermined position.

14. In combination, a supply-circuit, a motor-armature connected in said circuit, a motor-field connected in said su pply-circuit, a resistance in said field-circuit, a second resistance in said armature-circuit, a movable member for controlling said field resistance, a second movable member for controlling said armature resistance, said second member movable in one direction to remove said armature resistance from circuit and said first member movable in an opposite direction to insert said field resistance in circuit, means connecting said members to cause the same to move in one direction together but permitting said first member to move in an opposite direction independently, and means controlled by said second member for rendering said first member ineffective when the two members are moved together.

15. In combination, a supply-circuit, a mo tor-armature connected in said circuit, a motor-field connected in said circuit, a resistance in said field-circuit, a second resistance in said armature-circuit, a movable member for controlling said field resistance, a second movable member for controlling said armature resistance, said second member movable in one direction for removing said armature resistance from circuit and said first member movable in an opposite direction for inserting said field.

resistance in circuit, means for connecting said members to cause the same to move in one direction together but permitting said first member to move in the opposite direction independently, means controlled by said second member for rendering said first member ineffective when the two members are moved together, and a retaining-magnet for holding said second member in a predetermined position.

16. In combination, a supply-circuit, a motor-armature connected in said circuit, a resistance in said field-circuit, a second resistance in said armature-circuit, a movable member for controlling said field resistance, a second movable member for controlling said armature resistance, said second member movable in one direction to remove said armature resistance from circuit, and said first member movable in an opposite direction to insert said field resistance in circuit, means connecting said members to cause the same to move in one direction together but permitting said first member to move in an opposite direction independently, means controlled by said second member for rendering said first member ineffective when the two members are moved together, a magnet for retaining said second member in a predetermined position, and a spring tending to return said second member to its initial position.

17 In combination, a movable member, a resistance controlled thereby, a second movable member, a resistance controlled thereby, means for connecting said members to cause the same to move in one direction together but permitting said first movable member to move in an opposite direction independently of the second member, and means for automatically returning both members to their initial position upon the release of said second member.

18. In combination, a movable member, a resistance controlled thereby, a second movable member, a resistance controlled thereby, means for connecting said members to cause the same to move in one direction together but permitting said first movable member to move in an opposite direction independently of the second member, a retaining-magnet for holding the second member in a predetermined position, and means for automatically returning both members to their initial position upon the release of said second member.

19. In combination, a supply-circuit, a motor-armature connected in said circuit, a motor-field connected in said circuit, a resistance connected in said field-circuit, a second resistance connected in said armature circuit, a movable member for controlling said field resistance, a second movable member for controlling said armature resistance, said second member movable in one direction to remove said armature resistance from circuit and said first member movable in an opposite direction to insert said field resistance in circuit, means for connecting said members to move the same in one direction together but permitting said first member to move independently, and means for short-circuiting said field resistance when said members are moved together.

20. In combination, a supply-circuit, a motor-armature connected in said circuit, a motor-field connected in said circuit, a resistance connected in said field-circuit, a second resistance connected in said armature circuit, a movable member for controlling said field resistance, a second movable member for controlling said armature resistance, said second member movable in one direction to remove said armature resistance from circuit and said first member movable in an opposite direction to insert said field resistance in circuit, means for connecting said members to move the same in one direction together but permitting said first member to move in an opposite direction independently, and means controlled by said second movable element for short-circuiting said field resistance when said members are moved together.

21. In combination, a movable member, a resistance controlled thereby, a second movable member, a resistance controlled thereby, a magnet to retain said second movable member in a predetermined position, means for causing said members to move together until said second member is grasped by said magnet and thereafter permitting said first member to move independently of said second member.

22. In combination, a movable element, a resistance controlled thereby, a second movable element, a resistance controlled thereby, means tending to keep said second movable member in its initial position, a magnet for retaining said second member in a predetermined position, and means whereby said first member will move said second member to a position to be grasped by said magnet and thereafter operate independently of said second member.

23. In combination, a pair of movable members pivoted upon a common center, resistances controlled by said members, a part upon one of said members adapted to engage a part on the other member to cause both members to move in one direction together but permitting one of said members to move in an opposite direction independently.

24. In combination, a movable member, a resistance controlled thereby, a second movable member, a resistance controlled thereby, said members being pivoted upon a common pivot, a part on said first member adapted to engage a part on said second member to cause said members to move together in one direction, but permitting said first member to move in an opposite direction independently, and

means for returning said second member to its initial position.

25. In combination, a movable member, a resistance controlled thereby, a second movable member, a resistance controlled thereby, said members being pivoted upon a common pivot, a part on said first member adapted to engage a part on said second member to cause said members to move together in one direction, but permittingsaid first member to move in an opposite direction independently, and a spring for returning said second member to its initial position.

26. In combination, amovable member, a resistance controlled thereby, a second movable member, a resistance controlled thereby, means operatively connecting said members said latter member being movable with the former member in one direction and the former member being movable independently of the latter member in the opposite direction, a magnet for retaining the latter member in a predetermined position, and means for connecting said members, whereby when said first member is moved to a predetermined position said second member will be moved from engagement with said magnet.

27. In combination, a movable member, a resistance controlled thereby, a second movable member, a resistance controlled thereby, means operatively connecting said members said latter member being movable with the former member in one direction and the former member being movable independently of the latter member in the opposite direction, means tending to keep the latter member in the initial position thereof, a magnet for holding the latter member in a predetermined position,and means for connecting said members whereby when said first member is moved to a predetermined position, said latter member is disengaged from said magnet.

28. In combination, a movable member, a resistancecontrolled thereby, a second movable member, a resistance controlled thereby, a magnet for retaining said second movable element in a predetermined position, means for causing said members to move together until said first member is grasped by said magnet and thereafter permitting said first member to move independently of said second member, and means for connectingsaid members whereby when said first member is moved to a predetermined position, said second member will be disengaged from said magnet.

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

ALBERT J. HORTON.

Witnesses:

A. B. HUBBELL, A. VELLESEN.

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