US1023980A - Motor-starter. - Google Patents

Description

G. H. WHTTINGHAM.

MOTOR STARTER.

APPLIGATION FILED .1111113 5, 1911.

loggggg, Patented 1p1-.23, 1912.

2 SHEETS-SHEET l.

G. H. WHITTINGHAM.

MOTOR STARTER. APPLICATION FILED JUNB5,1911.

1,023,980. Patented Apr. 23, 1912.

2 BHEETSBHEET 2.

through the armature is broken, the main switch then opens suddenly and the are forming at the terminals ot the main switch is then instantly blown out by the magnetic intluencc of thel solenoids which regulate the closing movements ot the resistancecontrol ling switches.

in the accompanying drawing, Figure l is a tronteleration of2 the mechanism einhodviug the invention: Fie. 2 is a side eletv, f C

ration of the same, the parts being in their normal positions; Fig. 25 is a bottom plan view ot the mechanism, the switch arm and magnet for closing the supply circuit being omitted; Fig. l is a section through the V`d main switch n'iembcr; Eig. 5 a sage vier.' et portions, ot the mechanism is. showinu the main switch closed, and a resistance controlling switch open,y in 'full and closed in dotted lint-s; and Fig. G diagrammatic view illustrating the cir- -uit ronnertifms.

" to the drawingr A indicates a f main srvitf'h, indicated. at ld.

"the main switch comprises a member eontrollml by the electrt'miagnctic device and a spring pressed member u which adapted to he pressed rearwardly trom itsv normal sitionI` shown in Fig. Q, to the position szunvn in Fig, 5, b v the switch memher then the latter moved to closed position electr-omagnetir device. rThe member l comprises a suitable cont'at l` mounted upon an arir which is secured to the armature 3. 'this armature is mounted upon a pivot pin il in the tramo 3C of the elertromagnet t and normally held away trom the magnet hy gravity, the outward movement ot' the armature being limited hy a toe ll on the'arn'iature which engages the magnet trame. )is shown in the diagram.y the member is connected to the supply wirev 2li and the elet-tronmguet l has its coils connected h v conductor 2lb to the supply wire Ill and h v conductor lll. switch ttl and eondurlor lwire 51T. will switch flat) is el he evi-lent that when the :is-cd the magnet -t will he rnirgimid and will moretheswitt-h numhert" '1 to closed position and that when the switch lll is opened the magnet will he dciiuergixed and tlul switch numher r will return to normal position. opening the main switch lllA` thisl returnnmrmmnt ot' the member f being assisted hv the spring pressed member f l to the opposite supply;

iil "ll\ s d main switch member c rises a .sui ahh contactamounted inthe g which extends through a lug'9 on the bracket B and through the panel A, this stud and bolt 10 serving as means for securing the bracket to the panel. A spring 8 is interposed between the stud and sleeve t3, as shown in Fig. 4t, and this spring normally presses the member e toward the opposing member c of the main switch. It will be secu that the member e is electrically coni neeted to the frame or bracket B and that when the main switch is closed the bracket 'ill be connected to the side 37 of the supply circuit.

The bracket B comprises a back piece e, a shelf Z/ projecting forwardly therefrom,

ears 11 depending from the ends of the shelf' and side pieces 12 projecting forwardly beneath the shelf between the ears 11. A rod 13 extends through the ears 11 and side pieces 1Q, and between said ears and side pieces bell crank switch arms f and g rc hungupon the rod 13. The depending arms 14; and 15 of the levers f and g are provided with suitable Contact surfaces 1l and l5 adapted to engage stationary contacts 1G and 17, respectively, the latter being connected to successive steps ot' the starting resistance. The arms 14h and l5b of the bell crank levers are bifurcated and extend through slots in thc lower ends of the cores 1S and 19 ot solenoids 2O and 21 which are mounted upon the bracket. Pins 22 piv otall connect the forked ends of the levers with the solenoid cores.

The sleeve tl ot the main switch member e is provided with arms ti projecting laterally in opposite directions and these arms are norn'iallv pressed against the depending switch arms lst and 'l5 by the spring S, thus holdingr the resistance controlling switches l" and (l normally open and supporting the cores 1S and 19 ot the regulating solenoids Q and Q1 in upper positions. In thc open l positions ot these switches the arms 141 and bosses 7f-` ot' the bracket, which toi-m stops for these switch levers and limit thtI outward movement ot the sprmgpressed member tast stated. 'l`he lower edges of the side 2 plates t2 ot the bracket extend close to the l arms ti and torni guides tor prt-venting the l arms l'rom turning with the sleeve t3 out ot their proper relation to the dependinjf l switch arms 'Il and l5.

l The solenoids 20 and 21. as hereinafter `explained. are connected in the armature circuit and regulate the closing movements; ot the resistance-controlling switches. lP and (l and they are wound so as to produce opposite poles-'in thil lower ends of the cores 1S and lll. if will he noti-d that tlv` main l switch ron acts l and are lia-ated between i, the ends oi these cores and in the path ot tubular bosses b2 at the ends of the shelf?.

b ot the switch levers abut against the' the arms (3 ht which bear aeainst the levers, I

by N and S, at the lower ends of the cores 118 and 19 and the are between the'nrain switch contacts would therefore he delected upwardly. A heet 11i' asbestos 5 may he placed under the shelf b to prerent blistering of the shelfA by the are. By rea' c" g the cennections the arc may be ed downwardly, if denn-ed. Prefereelieet bij an iron volte piece i3 is arranged at. the upper ends; et the sclenoide to reduce 111e reluctance et' the magnetic circuit.

lhiie onlyv two regulating eeleneids and twe 'steps et' r1eif1tanee are shown.E for the 'pose ce noted that the resistance and solenoids are normallyY 111 c 1.; the resistaneeafontrelhng switches cannet he closed until atter the 'rcni1 has h1 n completed through the gulating solenonls. the resistance and the inatiire :1nd that 'ted lioth the re istance and the regulatsoiennids are 1,'1t. ont of circuit. lt, will allo be. noted that when the manually c1111- they inain switch is extinguished hy the inag- C netic iniucnce elf the solennide. The inain @witch 11111),7 he closed and opened as often 11111 rapidly' as desired without endangering the n eter.

45 l. I1 starter for electric n111t11r 11111111115111- 111e a main switch 'tor opening' and closing ille Suppl); circuit. a 11111'111allj11' 1.1111111 resieta11ee-eentr1:llinev switch `an1l :111 electa-11n niaejnetie device ter .rele'ulating the cl11 ;in ij 5@ increment et the latter switch. said device having'a core nrarn1al11re adjacent the c1111- taets 1t the main witch and ,serviingr as a l1l11w-1111t- 2. starter ter electric motors e11|1111ris 55 in g a uiain switch t'111' openinil and closing` the .auiiplv circuit. nnrniall)v 11111111 renistanee controlling switches, and electriunagnetic devices for,ref nlatingY the closing nniveinents 11t2 the latter :svvllclws` said devices heine' ar- 5G ranied :1111l1'111111e1'te1l 11ast11 111'111lu1'e 1111111 ,Lite poles adjacent the contact surfaces 11l` l the inain Switch.

31..)1 Marler l'11'electric 11111t111 1'111111risi11g a inain :nvltch 'i111' awning anal cloning; the 55D' raippl'v'eirenit,normally11111311 resista 1cee111r of illnstratien, it will be undenat'ter the motor has heen trolling switches, and electreniagnetic devices tor regulatingl the closing ineveinente ot' the latter switches, aid devices having windings in the armature circuiti ot the 11111- tor and being arranged and connected so as to produce opposite pele' adjacent the eentact enrtace4 o1 the niain switch.

t. A starter for electric nin-tors ceinprising a inain ,switch iter opening and closing the Supply circnit` nerinallj,y open resistance controllingA Switches, regulating s11leneide havin@ their wil'idings, in the armature circuit or the n'iotor and having their cores eperativeljy connected to the latter switches, the enter ends of said cores being ar ringed adjacent te and on opposite Sides et the inain switch con acts and the windinge et Said solenoids being connected so as to pre duce opposite poles in said ende ot the cores.

17. .Il starter for electric motore comprising normally open resistain'e-eonti'nlling Switches, electromagnetic devices haringl cores or armatures Connected to said switchenv and adapted to regulate their cloeing nierenice, and a n'iain switch having its c1111- taet surta-:es arranged hetween and adjacent the ends et said cnreal 111' armatures.

G. fr sttrter 'ller electric motors compriaing 11,1,11'111ally open resistance-contrnllin l switches, cle"tr11n1:1gnctie devices havii cores or armatures connected to Switches and adapted to regulate their cles ing nn'irenients, a norni; ll v open inain Switch haring' its contact surt'znfer; arranged i1etween and adjacent the t.

ne el said core# 1' armatures, and 11101111.19 i111' controlling the i1'1eningand closing11111v11n1111tf111teaidxnain switch coniprieing :111 electromagnetic device and a Switch for opening.;V and cloeing the circuit through .Said latter device.

7. A starter ttor electric motorel eeniprising' a resistance c1111 .rolling switch, an elee treinae'netie device. havin.;T a core 111' arinature connected te eaid Switch tn regulate its closing increment` a sprint'qn'ersrd ineinher 11111'111all'v hnhling Said switch 111111.11. a inain switch contact 1111 vahle with said nieinher and arranged adjacent to and within the magnetic inllnenee ot Said core or armature, and a n1a 1neti1'ally operated natnt| switch 11111111he1' adapted, in its (fleeing 111111111111011@ to tirsr engage ai1l contact and then more .Said s111'i11g-i11'essed nieinher t1-1 rel lane the resietanee-enntrulling Switch. and` in opening'. t11 release the spring-preaaeil nlcinher anil then interrupt' the supply circuit.

.starter tor electric inotors comprisiner resistance-controlling switehee7 electrcnlagnetie devices having' cores 111' arinaturesennnected t11sai1l switches an' adapted te regulate their closing; 1n11ven'1ents. a s111'i11g-11ressed n1en'1her normally holding' .-ai1i switches 11111111, 11 inain switcn enntact.

l 1111-11. ahle with mid ineniher and arranged hetween and :117111115111111 the ends of Said cores er Yand, in opening, to release the armatures, and a magnetically operated main switch member adapted, in its closing movement, to irst engage said contact and then move said spring-pressed member to release the vresistance-controlling switches,

springpressed member and then interrupt the supply circuit.

9. A starter for electric motors comprising resistance-controlling switches, two solenoids for regulating the closing movements ot' said switches, said solenoids having their windings arranged in the armature circuit ot' the motor and connected so as to produce opposite magnetic poles in the outer ends of 'their cores, a spring-pressed member normally holding said switches open, a main switch contact movable with said member and arranged in the path of the magnetic ilusY passing between said cores, and a coperating main switch member adapted, in closing, to first engage said contact and then move said spring-pressed member 'to release the resistance-controlling switches.

1 0. A starter for electric motors comprising resistance-controlling switches, two solenoids tor regulating the `closing movements of said switches, said solenoids having their windings ar. 'anged in the armature circuit of the motor and connected so as to produce opposite magnetic poles in the outer ends of their cores, a spring-pressed member normally holding said switches open, a main switch Contact movable with said member and arranged in the path ot' the magnetic flux passing between said cores, a coperating main switch member adapted, in closing, to first engage said contact and then move said spring-pressed member to release the resistance-controlling switches, a. magnet lor actuating said copcrating main switch member, and a manually operated switch for controlling said magnet.

'11. A starter for electric motors comprising resistance-controlling switches, two solenoids for regulating the closing movements of said switches, said solenoids having their windings arranged in the armature circuit of the motor and connected so as to produce opposite magnetic poles in the outer ends ot' their cores, a spring-pressed member normally holding said switches open, a main switch contact movable with said member and arranged in the path oit the magnetic flux passing between said cores, a coperating main switch member adapted, in closing, to rst engage said contact and then move said spring-pressed member to release the resistance-controlling switches, a magnet arranged in a circuit independent of the armaing a suitable support, two

ture circuit, for actuating said cooperating main switch member, and a. switch tor opening and closing the circuit through said magnet.

12. A starter for electric motors, comprisswitch levers, adapted to cut out starting resistance, pivoted to said support and hai/ing horizontal and vertical arms, vertically arranged solenoids, for regulating the closing movements of said levers, said solenoids having their cores normally resting on the horizontal arms of said levers, a spring-pressed member normally bearing against the vertical arms of said levers and holding the latter in open positions, a main switch contact on said spring-pressed member, a cooperating main kswitch. member, and a magnet for operating said last-mentioned switch member.

13. A starter for electric motors, comprising a suitable support, two switch levers, adapted to cut out starting resistance, pivoted to said support and having horizontal and vertical arms, vertically arranged solenoids, for regulating the closing movements of said levers, said solenoids having their cores normally resting on the horizontal arms of said levers, a spring-pressed member normally bearing against the vertical arms of said levers and holding the latter in open` positions, on said spring-pressed member, a coperating main switch member, and a magnet arranged in a circuit independent of the motor circuits for' operating said last-mentioned switch memberll. A sta-rter for electric motors, comprising a. suitable support, two switch levers, adapted to cut out starting resistance, pivoted to said support and having horizontal and verticalarms, vertically arranged solenoids, for regulating the closing movements of said levers, said solenoids having their cores normally resting on the horizontal arms of said levers, ber normally'bearing against the vertical arms of said levers and holding the latter in open positions, a main switch contact arranged on said spring-pressed member betweenthe lower ends ot said cores, a copating main switch member, and a magnet for operating said last-mentioned switch member.

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

GEORGE H. VVI-IITTlNGHi/XM. lVitnesses:

M. E. NIooLL, HERTHA ERNST.

a main switch contacta spring-pressed mem-n

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