US831404A - Controlling-switch. - Google Patents

Description

PATIJTED 18, 1906.

H. P, BALL.

CONTROLLING SWLTCH' APPLICATION FILED FEB. 23, 1905.

2 SHEETSSHBET 1.

lnvcrwow", Henry P. Ball. J;

PATENTED SEPT. 18, 1906.

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GGNTROLLING SWITCH APPLICATION FILED r EB. 23,1905 v 2 SHEETSSHEET 2v Invenkon WHnesses;

UNITED STATES PATENT OFFIGE.

HENRY PRICE BALL, OF NEW YORK, N. Y., .ASSIGNOR'TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

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Specification of Letters Patent.

Patented Sept. 18, 1900.

Application filed February 23, 1905- Serial No. 246,818. I

invented certain new and useful Improvements in Controlling Switches, of which the following is a specification.

The present invention relates generally to switching apparatus for the distant control of electric motors, and more particularl to the construction of the control-switch an its circuit connections.

The invention is particularly designed for the control of motor-actuated switches such as are employed in breaking high-potential circuits; but it should not be limited to this specific application, since it is capable of use under other circumstances where the motor is to be operated intermittently each time to perform a definite work or to produce a definite range of movement.

In carrying out the invention a double throw contro -switch is connected so as to control a circuit through two arallel branches leading to the motor to e controlled, and other switching mechanism is included in these branches and operated by the motor to close the circuit through one branch and open it through the other at the end of a definite range of movement. With this arrangement the circuit through the motor can be completed only by throwing the control-switch to the proper contacts, and to.

be best understood upon referenceto the fol-- lowmg detailed description, taken in connection with the accompan drawings, and its novelty will be spec1fica ly pointed out in the appended claims.

In said drawings, Fi e 1 is a front elevation of the control-swltch. Fig. 2 is a side elevation of the same, showin parts in section; Fig. 3, a rear view of 5m same,

and

Fig. 4 is a diagram illustrating the connec' tions of said switch with the motor and its accompanying control mechanism.

Throughout the views like characters refer to like parts.

Referring to the control switch, 10 designates a suitable sup 'ort, such as an insulating-panel of a 'switc board, upon which the control-switch-is mounted,'and 1l 11 and v 12 12 designate the fixed switch-contacts, which are mounted on an insulating block'or support 13, located at the rear of the anel 10, and secured to a spider 14 by suitable bolts 15. This s ider is in turn secured to a thimble 16, whic extends through an aperture in t e support 10 and terminates at its front in hreaded en agement with the faceplate 17, which is hefd against movement by suitable bolts 18. The contacts 11 11' and 12 12. are adapted to be connected by a brid g contact 19, secured to an insulatln' bloc dr head 20, mounted on the rear end 0 a rod 21, which extends through the thimble 16 toward the front of the support 10. The forward end of the rod 21 is connected by a link 22 to the end of an operating-lever 23', whichis pivoted at the point 24 to a swiveled support 25, which comprises a tubular portion 26, which extends into the thimble 16,

and two laterally-projecting arms 27, to the outer ends of which the operatingrl'ever 231s pivoted. This lever, which is provided with a handle '28, when rotated with its support 25 causes the bridgin contact 19 to be similarly rotated, and the movement of the parts in either direction is limited by the engagement of the projection 29 on the lever 23 with the limitin -stops 30, mounted on the face-plate 17. 'l hese stops are located so as to stoprotation when the bridgingcontact has reached a position in line with either set of contacts 11 11 or 12 12. It will be noted that this rotation of the operating-lever does not bring the switch-contacts lnto engagement, because of the length of the connecting-rod 21 and its connectlng-link 22. To bring about this engagement, the operating-lever 23 is rocked about lts pivot 24 toward the support 10, so. as to bring the handle 28 to the dotted-line position shown in Fig. 2. In order to prevent this movement except when the bridging contact 19 is in line with either set of fixed contacts, the space between the stops 30 ontheface-plate 18 is provided with a projecting rib 3 1 ,which engages the projection 29 on the operatin -lever and prevents its movement into the (fitted-line position. This rib does not extend the entire distance 5 between the stops 30, but stops short thereof, leaving a slot or depression adjacent each stop for the assage of the projection 29 when the hen le 28 is forced inward. To return the contact 19 to its 0 en osition, a coiled spring 32 is provide is sprin bears at one end against the spider 14 an at the other against an armature 33, which abuts the insulating-head 20. The armature 33 is composed of suitable magnetic ma- 1 5 terial and cooperates with the electromagnet 34 to hold the switch-contacts inenga ement without the continued application of orce to the operating-lever 23,

2 5. Referring to the diagram shown in Fig. 4,

the contacts 11" 12v are connected in series with the coil 36 and to one leg 38 of the supply-circuit; The other contacts 11 and 12 are connected, respectively, in series with indicator- lamps 39 and 40 to a common lead 41,

also connected to the leg 38 of the supply-circuit. A suitable resistance 42 is interposed in the lead 41, so as to cut down the current to an amount suitable for the indicator- 3 5 lamps 39 40. The other leg 43 of the supplycircuit is connected by a lead 44 to armature 45'of the'motor to be controlled, and the. circuit from the armature is completed through .the field-winding 46 to the fixed contacts 47' 4o 48 of two motor-controlled switches R R,

whose movable elements are electrically connected to the contacts 12 and 11, respectively. The switch-blades 49 and 50are controlled by cams 51 and 52,'actuated bythe 45 motor-armature 45, and these cams are shaped so as to maintain one switch, as R, open, and the other, as R, closed during a definite movement of the motor. When this movement is completed, the switch R 50 is closed, and substantially simultaneously 1 therewith the switch R is opened. With this organization it will be seen that there isalways one circuit com leted through the motor, and by throwing t e control-switch to the 55 proper position the motorv can be started to gperate through its given ran e of movement. or instance, assunung that t e parts as. illustrated are at rest, it will be apparent that if the control-switch is thrown so as to-com- 6 plete the circuit between the contacts 11 and 11" a circuit will be' completed from the leg 1 38 of the supply throughthe lead 41, resistance 42, lamp 39, contact 11, through one branch, and from the same leg 38 through the 465 branch including the magnet-coil 36 to con- This magnet com-- o prises an annular core 35 of iron or other suitlever will indicate which way that" certain alterations and mod ma be made in the matter illustrated 5 tact 11, thence to contact 11, where the two branches combine and the circuit is com- 1 ileted through the switch-contacts 50 48, eld-winding 46, armature 45, and lead 44, t0

the other leg of the supplycircuit. This will be sufficient toset the 'motor rotating, and as it rotates it will maintain the circuit throu h the switch R until the cams have'moved ar enough to allow the contact-arm 50 to drop away and to force the contact 49 into engagement. This will break the motor-circuit, and thus stop the motor and 'at the same time will leave theother branch circuit in condi-- tion to be closed b the control-switch. In this operation w e the motor is rotatin current will be supplied to the lamp 39, am" as soon as its rotation ceases and the contacts 47 and 49 are brought together the lamp 40 will be lighted. If the motor is designed to o erate a switch S, as is diafi-ammatically s own, the particular lamp lig ted will ind cate whether or not the switch is open or closed. In this operation when the o erating-lever 23 is thrown to the right or eft in order to bring the movable contact 19 into line with the roper set of fixed contacts and is then form inward toward the support 10 Y to bring the contacts into engagement ,the circuit throu h the retaining-magnet coil.,36 will be comp eted, and the armature 33 will 95 be held' agamst the face of the magnet and the contacts maintained in engagement until the motor has completed its range of move- 1 ment and the circuit through the coil 36 is broken by the switch mechanism controlled 1 by the motor. The position of the operatingthe doublethrow switch was'last thrown y its osition to the right or left and also the con ition of the motor mechanism and the switch S b its 5 position relative to' the support 10. en"

.the lever-handle is near the supportee, for

example, inthe dotted-line 'position in Fig.

2it willindicate that the motor is still in olpi eration, and when it is most distant from t support it will show that the motor has ceased to operate. 7

To one skilled in the art it willbe a parent iiiizations wit out departing from the spirit and scope of the invention. I therefore do not wish to be limited to the specificmatter disclosed, but aim to cover by the terms of the ap ended claims all such alterations and-mo ifica- I20 tions. 1

What I claim as new, and desire to secure by Letters Patent oftheUnited States, is

1. The combination with an-electric motor, of two parallel circuits including said mo- 1 2 5' tor, a manual switch'for severally closin said parallel circuits biased to open when c osed', meansv operated by the closing of one of said parallel circuits to'hold said switch closed,

and means actuated by the motor tolbreak 1 0 the circuit last manually closed and place the other in condition to be closed by said manual switch.

2. The combination with an electric mo- 5 tor, of two parallel circuitsincluding said motor, a manual switch for severally closing said parallel circuits, a spring normally tending to open said switch, means operated by the closing of one of said parallel circuits to hold said switch closed against the action of said spring, and means actuated by the motor to break the circuit last manually closed and place the other incondition to be closed by said manual switch. i

3. The combination with an electric motor, of two parallel circuits including said motor, a manual switch for severally closing said parallel circuits biased to open when closed,

electromagnetic means energized by the closmg of one of said parallel circuits to hold said switch closed, and means actuated. by the motor to break the circuit last manually closed and place the other in condition to be closed by said manual switch.

4. The combination with an electric motor, of two parallel circuits including said motor, a manual switch for severally closing said parallel circuits, a'spring tending to open said switch, an electromagnet energized by the closing of one of said parallfll circuits to hold said switch closed against the action of said spring, and means actuated b the motor to break the circuit last manua ly closed and place the other in condition to be closed by said manual switch.

5. Thecombination with a main switch, of an electric motor. for operating said switch, two parallel circuits including said motor, a

1 manual switch for severally closing said par- 4 allel circuits biased to open when closed, means operated by the closing of one of said parallel circuits to hold said switch'closed, means actuated by said motor to break the circuit last manually closed and place the other condition to be closed by said manua l switch, and indicator-lam s included in said parallel circuits for showing the conditlon of said motor-actuated means and said i main switch.

so a. A double-throw electric switch biased to open when closed, megs-for holding said switch in either closed position for a definite time, and means for indicating which way the switch was lastthrown.

7. A double-throw electric switch biased to open when closed, means for holding said switch in either closed position for a definite time, and means for indicating which way the switch was last thrown and whether it is open or closed.

8. A double-throw electric switch biased to open when closed, means for holding said switch in either closed position, means for releasing said holding means, and means for indicating which way the switch was last thrown.

9. A double-throw electric switch biased to open when closed, means for holding said switch in either closed position, means for releasing said holding means, and means for indicating which way the switch was last thrown and whether it is open or closed.

10. In an electric switch, the combination with two sets of fixed contacts, of a cooperat ing movable contact, an operating-lever movable in one direction to bring-said movable contact into line with one set of fixed contacts and movable at an angle to said direction to bring said contacts into engagement, and means mounted to engage the operatinglever to prevent the latter movement except when said contacts are in line.

' 11. In an electric switch; the combination of fixed and movable contacts, a rotary reciprocating member carrying the movable contact, a movable support pivoted concentrically with saidunember, and an operatinglever secured to the end of said member and pivoted at an intermediate point to said suport. p 12. In an electric switch, the combination with fixed and movable contacts, of a rotary reciprocating member carrying the movable contact, a spring tending to maintain said contacts out of engagement, and an electromagnet for holding said contacts in engage-v g HENRY PRICE BALL.

Witnesses;

HARRY W. PUGH, JULrUs BEUBE'r'.

IOO

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