US963169A - Apparatus for starting electric motors. - Google Patents

Description

S. B. PAINE. APPARATUS FOR STARTING ELEGTRIG MOTORS.

APPLIOATION FILED MAY 28, 1909.

963,169 Patented July 5, 1910.

2 snRRTs-sHRRT 1 Witnesses: Inventor:

S. B. PAINE.

APPARATUS FOR STARTING ELECTRIC MOTORS.

APPLICATION FILED MAY 28, 1909.

963,169. Patented July 5,1910.

2 SHEETS-SHEET 2.

Fig. Z5.

. Fig. 2..-

HUN/V/NG START/N6 Witnesses: Inventor: /fl Sidney B. Paine,

. citizen of the To all whom ii'may concern:

' sachusetts,

UNITED swa -Pr m.

SIDNEY B. PAINE, OF NEWTON,, M ASSAC IU'SETTS, .A SSICiIQOE TO. GOMPANY, A CORPORATION OF NEW YORK.

GENERAL 'nnnosaro arranarus ron. srnnrme ELECTRIC MGTORS.'

Specification of Letters Patent.

Application filed. my 28, 1909. Serial No. 493,950.- I

Be it known that I, SIDNEY B. Pam-a, a United States, residing at N ewton, county of Middlesex, State of Masln connection with starting .apluralitylof motors,-and has forgits obgect an improvement in such an apparatus. u

accomplish the object of my nvention :invention being by -a certainnovel arrangement of apparatus and connections, the novel features of my pointed out with more particularity in the claims annexed to and form- 'aparti'of this specification. A ora further understanding of'my mvention referencemay be had to the accompanying drawing where igure. 1 shows diagrammatically the connectiohs which I employ; Fig. 2 shows a detail of certain features of the apparatus which I employ; and -Fig. of Fig. 2. v

Referring first to Fig. 1, I have shown a source of voltage 1, this being il ustrated by a'three-phase enerator. This source is connected b conguctors 2 to a starting device 3. A p urality of conductors 5, 6, are shown as also connected to the starting device 3.- This starting device is shown as being the well-known type of starting com an auxiliary switching stood manner. Whenqcontacts nection w1th ..contacts 9, conductors 4, 5 and pensator'for the starting of induction motors 'andother a paratus,-and its especial eatures consist of a number of movable contacts 7 which may be made to make contact with/stationary conducting members 8 or 9. In addition to starting device 3 I employ device 10, the operation of-which will be explained more in detail later. -When the contacts 7 are in connection with contact 8 conductors 4, 5 and 6 are energized with a portion of the voltage from the source. This is accomplished by meansof the usual form of compensator, which has windings 11 connected across conductor-s2, these windings having taps 12, which are adapted to energize conductors 4, .5 and 6- with only a portion of the voltage from the source in the well underare'in con have invented certain-new and useful Improvements in Apparatus for' Starting Electric Motors, of which the fol-- to apparatus used 3 shows a detail the motors. are energized '6 are energized with the-usual fashion. o

Aplurality of motors 14, shown as threephase induct-ion motors, are shown as connec'ted in parallel to conductors 4, 5 and 6. Switches 15 are shown as these switches being shown as of the usual oil-insulated type. Ove -load trippin devices, which consist of energizing co" s 16 and mechanism 17 in operative relation therewith areshown, the over-load tripping devices in conjunction with a spring mechanism, which is usual in such switches and is not shown, openingthe switches when an overload occurs upon the circuit. The auxiliary switchingdevice 10 is so arranged that when startingdevice 3is oper ated so that contacts 7 'are in connection with contacts 8, the overload tripping devices are rendered inoperative. When contacts 7 are in connection with contacts 9,.that is, when with full voltage from the source, or device 3 is in the so-called running position, trippin devices 16 are rendered operative as auxfiia'ry switching device 10 is moved in such amanner that its movable conducting members 10 10 and 10 are moved out of contact with the stationary contacts 10, 10, and 10,, see Fig. 3.

Referring now to 2, I have shown a detail view of the starting device 3 and the auxiliary device 10.-,, The starting device, of which only anoutside view is shown, is illustrated as being of the usual compensator type, and'has a handle 18, which is used for moving contacts 7 to connect them ,with contacts 8 or contacts 9. In operative relation with handle 18 is shown a rod 19, which is attached at one end toa member 20 by means of nuts 21 in operative relation with a screw-thread 22 formed upon the end of the rod. These nuts ma ,-.be used for pro erly adjustingthe le I of the rod. Th other endof rod 19 is shown asconnectcd to switching device 10, the r d being connected to conducting members 10 10 and 10, in such a manner that when the rod is moved it;1 will make or break the connection between t ese 10, 10., and 10 'Member 2Q is shown as formed Patented any 5,1910."

full voltage from the source, these conductors being placed in series with conductors 2 through fuses 13,131

members andthe stationary members with a connected in series between each motor and the conductors,

1. the hand le 18 .of starting device. 3

be moved to the running position, so that otpin23 against the left-han slot 22 extending through it. This slot engages with a pin 23, which is attached to andle l 8 ,d ,,A tcthelower end of handle 18 .,is 6110 P9 g2 r=lfi i ate-int si in 5 of e moving contacts 7 in the usua 7 man:..

iiietiftii tii o than oi will be as follows: Etc

tion,that is, contacts 7 are not in connection 's witching'=device lo'is in the position shown 'in Fig. l. "When it is desired to start up I motors 14, handle 18 is moved so that it will 1 be insuchposition that pointerQet -indicate the startingposition of the device. -When ;t he"handle s in this position, contacts Tare in connection'with contacts 8, conductors at,

, 5,-and ,6 are energized with a portion; of the vol ge of the source, auxiliary contact degviee l0 has'its contacts'in the position shown in thedrawings, as pin 23 on. handle 18- .moves against the right-hand edge of. slot 22, and thus-forces the contactmeinbers l0 etc., in the osition shown, The overload J tripping devices of the switches are rendered --inop erative, the object of this being that as.

y the running currentof an induction motor is cons derably less than the starting current,

- if thes e tripplng devices are adj usten to open =con'ductors4, 5 and 6 will be energized with ,t he-full voltage; from the source 'When the :handle isin this position, owin to the action edge ofslot 22, theswitching device 10 will have its con- -,tacts moved; so. that the overload tripping devices folitheroil-switches will be placed in -se 'ries betweenthe motors andv the source of voltage, andgwillthus cause theswitches-to :operate if 1 an; overload occurs uponany of tthe'motorl sg; 4 r i -ii lllhile "I haveillustrated 'rny invention as applied-to the, starting of three-phase -im .25 zgductionimolbrs'l do not limit-myself'to'the -startingof-alparticular type of motors with s'a'; particular, number of pha eis, biit seek in ltheeappended claims to cover-ail dillere'nt} l arrangements and imodifications' o ff'tli'e ap we t Bate'nt ofin the art and will not depart from the spirit of my invention. "S \Zl a t I claim as; ,.ne v anddesire to secure iniiedisaf system of distrihution, a source of l ege ana ys nlet Q I P G Q ra; rimm f Qrnotors onne'ctd' "thereto, "switches cted inf s erie's between the motors and the mnd ct rsioverload tripping devices for the switches, means for energizing theco nductgi's with a portion of the generator voltage from the source and rendering the tri ing devices inoperative, and means for energizing the conductors with full voltage from the sourceand rendering the tripping devices operative; c v 2. In a system- 0f distribution, a souree' of ---voltage, a plurality of conductors, a plural ityof motors connected thereto,"-s ivitches' connected inseries between the motoi s and .the" conduetors, -overlh'ad trippingdevices for the switches, means"fousinniltaneously energizing the. conductors with a portion of the voltage from the source andrrendering it-he' tripping deviees inoperative, and means for simultaneously energizin -thefeond'uctors with full voltage from tie source and. rendering the tripping devices operative} 3.-"I n;a--system of distribution, 'aso'ur'c'e'of vol tage, a' plurality of: cond-uetors; a pl urality "-Of 1nOtOl'S connected -;thereto, switches connected in series between theflnotorsf amlthe conductors; overload tripping devices for 'the switches, a co'mpei'isatoi adapted in- 9 5 one position to connect-"the conduetofsfton portionof the voltage-Myths ource-"and in a second positionto the full voltage-tithe. source, and means for rendering] the trip-, ping devices inoperative. V j LA-In a system of distribution, a source-oi voltage, .a' plurality of conductors,- ajplnra l.- ity of induction motors connected in pa".-- allel thereto,- switches: connected in series between 1 each motora n'd the conductors; 1 overload trippingdeviees "for ithe switches, a compensator adapted -i-none posit-ion 'to connect the conductors"td afportiom of- -the voltage :of the source,- and i a second- "-p'osimeans in operative: relation piththe-"co n pensator forrendering the tr ppii'ig devices .inoperativewhentthe compensator is in its first 'i-position, and operati ve when ;h 'pensator is-rin fits second"-- osit'io'n In 'witnesslvwheiteofi-iI aveglie -'1nythand. this 26th 'day Uf fMayHQOQ' '5 SIDNEY PA riv- Bl

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