US890621A

US890621A - Circuit-controlling device.

Info

Publication number: US890621A
Application number: US39600507A
Authority: US
Inventors: George H Dorgeloh
Original assignee: General Electric Co
Current assignee: General Electric Co
Priority date: 1907-10-05
Filing date: 1907-10-05
Publication date: 1908-06-16
Anticipated expiration: 1925-06-16

Description

PATENTED JUNE 16, 1908.

G. H. DORGBLOH. GIRGUIT CONTROLLING DEVICE. v

APPLICATION ,FILED ooT.6,-1ao7`.

2 SHEETS-SHEET 1.

WZTMSSES' GE'UHGE H DDBGELUE Lm-gm. By

` PATENTED JUNE' 16,' 1908. G. H. DRGELOH. CIRCUIT CONTROLLING DEVICE.

APPLIUATIN FILED 0UT.5, 1907.

2 SHEETS-SHEET 2.

.X 550555 HJHGEZH UNITED STATES PATENT oEEicE'.

GEORGE H. DORGELOH, OF SCI-IENECTADY, NEW YORK, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

CIRCUIT-CONTROLLING DEVICE.

To all whom 'it may concern.'

Be it known that I, GEoRoEH. DORGELOH, a subject of the Emperor of Germany, residing at Schenectady, county of Schenectady, State of New York, have invented certain new and useful Improvements in Circuit- Controlling Devices, of which therfollowing is a specification.

This invention relates to devices for con-f trolling electric circuits and has for its object the provision of means 'whereby an electric motor may be stopped, started and gener'ally controlled in a reliable, safe and efficient manner.

My invention relates more particularly to means for controlling motors of the type ada ted to be run at a low speed in addition to t ie normal running speed, and which it is desired shall be started and sto ed quickly when running at full speed. is type of control is commonly used in connection with presses in which it is desired that printin e provided whereby the motor may means l be jogged along at a low speed. ,This

jogging is pireferably'and usually accomplished by having switches arranged at deiinite points around the ress.

-In the patent to Yates, No. 857,142, is disclosed acontrolling device of this ty e in which the motor may be jog ed along rom points around the rcss with .the starting arm 1n the ofi' position. t has been found, however, that tlie operator frequently will not take the trouble of going to one of the control switches or buttons in order to jog themachine along but will use the controlling handle. The result is that the startin contact segments are frequently injured y arcing.

In carrying out my invention I provide in connection With a controlling device of the type above described, an electromagnetic Specification of Letters Patent.l v

Application filed October 5, 1907. Serial No. 396,005.

Patented .Tune 16, 1908.

netic switch in all positions of the controlling y handle so .that it will be impossible to injure the device by starting too quickly. Meansv are also provided in connection with the electromagnetic switch whereby, when the latter opens to stop the motor, a brake resistance will be connected in circuitwith the armature so as to quickly stop the saine.

In the accompanying drawings, in which I have shown my invention embodied in a concrete form, Figure 1 represents one embodiment of my invention, the controlling arm being spring-pressed to the oii position Fig'. 2 shows the details oi the controller handle, Fig. 3 shows a different form of my invention g Fig. 4-shows a controller handle for the same; and 5 shows means whereby the controller handle effects the opening and closing of the electromagnetic switch.

Referring to the drawings (Figs. 1 and 2), 1 represents the insulating base of slate or soapstone having mounted thereon a controller handle 2 pivoted at 3 and provided with a double-acting spring 4, which gives the controlling arm a bias to the position shown in Fig. 1. The controlling arm is provided with a series of contacts 5, 6, 7, 8 and'Q, of which 5V and 7 are insulated from the arm and 6, 8 and 9 have electrical Contact therewith. The arm cooperates with

segments

10, 11, 12, 18 and 14, each of which have an insulating portion adapted to be engaged by the contacts on the arm when the latter is in the oii position. Segments 10 and 11 are bridged y contact 5 segment 12 is engaged by conl tact 6; segment 14 is engaged by contact 9 and contact 7 engages segment 13 so as to act as a bridging contact between it and the resistance contacts 15. A plurality of` insulating contacts 16 are likewise provided so as to be engaged by the arm in the off posh' the machine which is through conductor c 3() hpressed.

22 is arranged to hold the controlling arm in running position in the usual way and an overload magnet 23 isprovided, having a pivoted armature 24 which when raised opens the switch 25. This switch controls the circuit of the electromagnetic switch 26 operating a contacter 27 between the pairs of contacts 28 and 29. A plurality of switches or p'uslnbuttons 30 are arranged at some con-v vement place, as for instance, points around to be controlled.

The arrangement of circuits and the mode of operation are as follows: A represents the armature of the motor to `be controlled and, as shown', is of the compound-wound ty e having a shunt ield F and a series field S When it is desired to start the motor in the usual way', the controlling arm is moved to wards the right. As soon as the contact 9 engages the contact stud 19, the electromagnetic switchf26 will be energized as follows: from the positive main through the controlling arm to contact stud 19, thence 31 to the solenoid of 32, switch 25 and back The switch 26 thereswitch 26, conductor to the negative main.

upon operates and the contacts 28 are bridged so that the armature circuit will be closed as follows: from the positive main to segment 12; conductor 32 armature WA;

conductors

33 and 34 and segment 13, thence through contact 7; starting resistance 35; conductor 36; overload magnet 23; conductor 37; .contacts 28; series eld S Fand back to line. As the arm is moved on towards running position, resistance is cut out in the usual way, and contact 9 Amoves off the stud 19 and on to the segment 18. The circuit of the electromagnetic switch is thus maintained and now has in 'series with it the resistance 38 and the no-voltage magnet 22, the circuit being as follows: lfrom the positive main' to segment 18; resistance 38; segments 11 and 19; magnet 22; conductor 39; conductor 3] t solenoid 26; switch 25 and back to line. The magnet 22 being energized the arm will be held in running position in the usual way. Upon the occurrence of an overload, switch 25 will be opened, which in turn will denergize switch 26, to open the armature circuitv at contacts 28. This may occurwhile the arm is in any position. Upon failure of voltage.' the arm will return to the off position and the armature circuit will be opened at switch 26.

If it is desi red to stop the motor, one of the but-'tons 30s pressed, which will short-circuit the' novoltage inagnet 22.

If, instead 'of bringing V-the motor up to running speed, it is desired to press along at a low speed, the arm may be eft in the off position and one of the buttons This will cause the solenoid of switch 26 to be energied as follows: from the positive main to contact stud 40, thence "jog the i ment 47, thence to resistance It; resistance point where it will will not close it.

controls the armature circuit during the jog ging of the motor. In order to quickly stop the motor, brake resistance B is connected across the armature terminals from' conductor 32 to conductor 33 through contacts 28 and 29, and therefore when the contacter drops to open the motor cir-cuit, and contaets 29 are bridged, the armature is short-4 circuited through the brake resistance thereby quickly bringing the armature to rest. The motor may be reversed by moving the controlling arm to the left.

In Fig. 3 I have shown a form of my invention in which the controlling arm is not biased to the oil position, but may be left in any position as desired. The arm 42 is provided with contacts 43 and 44 electrically connected thereto, with the bridging contact 45 insulated from the arm. Contacts 43 and 44 engage respectively segments 46 and 47 while contact 45 bridges segment 48 and starting contacts 49, the insulating portion of the segments being provided as shown. Segment 50 is engaged by contact 5]. electrically connected to the end of the arm, and a projection 52 on the arm is adapted to engage

switches

53 and 54 when 'the arm is moved in either direction. These switches ai.; of bell-crank form as shown in Fig. 5, and are spring-pressed to the o en position. The overload magnet 23 and so enoid switch 26 are provided as shown, and the switch 55 adapted to en age with either

stud

56 or 57 is convenientr arranged as are also the buttons 30.

The arrangement of the circuits and the Inode of operation are as follows: W' hen it is desired to bring the motor up to normal running speed, the switch 55 engages contact 57, and arm 42 is moved to the right, closing the switch 54, when the solenoid switch 26 will be energized, as follows: from the positive main to switch 54; conductor 58; resistance R; solenoid 26; conductor 59; switch 55; conductor 60; switch 25 andbaek to the negative main. The armature`circuit will thus be closed at the switch 26. As soon as the arm releases the switch 54, the latter will again open so that the circuit of switch 26 will be maintained. with the additional resistance R in series; the circuit now being as follows: from the positive main to seg- R; solenoid 26; switch 55; switch 25 and back to line. The additional resistance It cuts the current of the solenoid down to a hold the switch closedbut The arm may now be must be brought back past the switch 54 so yso spirit of my invention, the'scope of which is' v set forth in the annexed claims.

that the arm passes oli the segment 47, and then by again closing the switch 54, the solenoid switch 26 will be closed with the resista'ince R in circuit. When it is desired to jog the motor along, the switch` is moved on to contact 56, and then by pressing one ot' the push-buttons 30, the circuit will be as follows: from the positive main 'to Contact 62; conductor 63; switch 55 5 conductor59; solenoid 26; conductor 64; pushbutton 30; conductor 60; switch 25 back to the negative main. This will close the armature circuit through the starting resistance.

1t will be seen that I have rovided a rlieostat in which the motor may e run at a normal speed 3 jogged along, at a slow s eed at same time always protected against overload, while the circuit is moreover always made and broken upon the electromagnetic switch. y

Various inodiiications. of my invention will, of course, suggest themselves to those skilled in the art without departing from the Vha-t l; claim as new, and desire to secure by Letters Patent of the United States, is,-

1. A starting rheostat com rising a resistance-varying switch, an electromagnetic switch in series therewith, means whereby said latter switch is closed when the resistance switch is moved towards runningr position, and means for controlling said electromagnetic switch when the resistance-switch is inthe oliA position.

2. A starting rheostat comprising a resistance-varying switch, an electromagnetic switcl'i in series therewith, means whereby said latter switch is closed by the initial movement ol the resistance switch, and

means independent of the position ot the .rcsistance switch l'or controlling` 'the electromagnetic switc7 3. A startingrhcostat comprising); a resistance-varying switch, an electromagnetic switch `in series therewith, an overload magnet controlling saidelectro]nagnetic switch, 'means whereby said latter switch is closed when the resistance switch is moved towards running position, and means independent ol` the current and ni the position oil ihn resist- Upon the occur.

ance switch for controlling the electromagnetic switch.

4. A starting rheostat com rising a resistance-varying switch, an e ecti'omagnetic lswitch in series therewith, means whereby said latter switch is o erated when the resistance switch is move towards running' position, means for controlling' said electromagnetic switch when the resistance switch is in the otf position, and an overload magnet controlling said electromagnetic switch in all positions of the resistance switch.

5. A starting rheostat com risingl a resistance-varying switch, an e ectromagnetic switch in series therewith, means whereby said latter switch is operated wh en the resistance switchl is moved. towards running' position, means independent of the position of said resistance switch for controlling the electromaenetic switch, and an overload magnet controlling said electromagnetic switch in all positions`of the resistance switch.

6. The combination with an electric motor, of a starting rlieostat therefor, an electromagnetic switch arranged to control thc motor through the starting resistance with 'the starting arm in the oli position, connections whereby said switch is actuated to close athe motor circuit when the arm is moved towards runninr position, and an overload magnet controlling said switch in all positions of the arm.

7. The combination with an electric inotor, of a starting rheostat therefor, anY electromagnetic switch in series with the starting resistance and arranged to control the motor through the same with the starting arm in the oli' position, connections whereby said switchis actuated to close the motor circuit l when the arm is moved towards running position, and an overload magnet controllingr said switch in all positions of the arm.

8. The .combination with an electric motor, of means for starting the same comprising a starting' resistance, a controlling arm therefor, an electromagnetic switch in series therewith and arranged to close the motor circuit with the controlling arm in the oil' position, a brake resistance, and means whereby said. resistance is connected in circuit with the motor armature when the elcctroxmagnetic switch is denergrized.

9. The combination with an electric motor, of means i'or start-ingrr the same comprising' a start/ingrr resistance, :1 controlling arm therefor, an electroniagnctic 'switch controlled by said arm and arranged io close the motor circuit through lhc sl nrtin;xl resistance with thc coi'itrolling arm in lhc oil' position, a brake resistance, and means whereby said resistance is .connected in circnil with the motor armature when the elccirnmngrnci ic switch is dencrgizcd.

lll. The combimition willi :1n elm-tric mntor, Aol' means l'nr si :1l-ling' Ihr` same .comprismotor armature when `the electromagnetic 10 swltcl 1s denerglzed,

In Witness Whelec, have hereunto set n1 y hand this 3rd day of October, lQOT.

`GEORGE H. DORGELOH.

TWitnesses BENJAMIN B. HULL, HELEN ORFORD.