US1685069A - Best available cc - Google Patents

Description

J. H. DILKS SWITCH OPERATING MECHANISM Sept. 18, 1928. 1,685,069

Filed June 12, 1924 7 Sheets-Sheet 1 O 6 O o Y O jv wcroz ovw- \fo lz/z/ 5 Zw nqys. I M

Sept. 18, 1928. 1,685,069

J. H. DILKS SWITCH OPERATING MECHANI SM Filed June 12, 1924 eats-Sheet 2 Sept. 18, 1928.-

III

J. H. DILKS SWITCH OPERATING MECHANISM VIN- Eiled June 12, 1924 '7 Sheets-Sheet 3 Se t. 18, 1928. 1,685,069

J. H. DILKS 4 SWITCH PPERATING MECHANISM Filed June 12, 1924 7 sne t's-sneez 4- Sept. 18, 192a 1,685,069

J. H. DILKS SWITCH OPERATING MECHANISM Filed June 12, 1924 '1 Sheets-Sheet 5 Sept. 18, 1928. 1 ,685,069

J. H. DILKS SWITCH OPERATING MECHANISM Filed June 12, 1924 7 Sheets-Sheet 6 Patented Sept. 18, 1928.

UNITED STATES PATENT OFFECE.

JOHN H. DILKS, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO ELECTRIC POWER EQUIPISIENT COBPORATION, OF PHILADELFHIA, IENNSYLVANIA, A CORPORA- TION o'F PENNSYLVANIA.

SWITCH-OPERATING MECHANISM.

Application filed Jun: 12,

My invention relates to'swibches for electrical circuits, having particularrelation to means for controlling theoperationthereof.

()ne object of my invention is to provide simnle and eili'cient means, whereby apparatus of the class described may be operated at will from a remote point. Y

Another ()lJjOClI'Of-ID)"lZlVeiltlDn )S to provirle electrical ineansrfor operating a highvoltage s witch,- said electrical; means being automatically :renderecl inefiective wnen the switch has moved from one operative position to another, together with a systern=of remote control including means for inclicatmg theposition of the switch. 4

A further object of my invention is'to-provide a system of control-fora driving motor, which causes tlieiiiopration'of s'aitldrivlng motor after-a predetermined'range of movement thereof and which: substantially simultaneously causes the application of braking means-to avoid overtravel of the'd'riving rn'otor. V i

Astill flirtlicllObjdtjOf myin'vention-is to =1 mvid'e' an electrical 'sj"s tem-'includiiiga -mo-' f tor; rie'rgizii'ig circuit therefor'ya relay for controlling dcirciiit, alll'lhlimlt sw tch oparable to open an d to-close 's'ziid circuit after a predeterminedrange 'of motor movement to cause the operation ofsaidr'ela'yf 3 l A still further objeetoflnj inv'ention is to provide-a syst-m of control ji'yliich includes a )li!1f:.lit}: 0ff0nmli 'swit'ches togther with a switch forrenderin ccl'tain of-"sa'id control .ches operative; epe ncling u p'oi'i tlIQPOSl- 192-1. Serial No. 719,677.

crgizing circuit when said motor has moverl througha predetermined range; a plurality 01'' indicating means; and a switch actuated in accordance with the movement of said limit switch for successively energizing said plurality of indicating means.

A still further object of my invention is to provide a switch construction, wherein the moi-able contacts are caused to snap from one position: to'another: under action of energy which is stored-while the switchis at rest.

A still =further object of my invention is to provide a switch construction, wherein the movable switch contacts may be positively moved from-one locked position toanother, the switch construction being furthercharacterized by certainother desirable features hereinafter :set f0rth. V

O thei-lobjects anclapplications of my invntion as well as details of construction and operation, -whereby-my invention may be practicec'lfwill be apparent, inore fully hereinaiterfrom-the following description and claims when taken in connection with the accompanyingdrawings -wherein, I Figd is a sicl'eelevati'o'nal view'of one form of embodiment ofmy'inventioni I ig; 2isa=detailside elevation a1 view, pa:-

only :in section; of" certain: portions of the sw:tch a'ctuatingmechanism of Frg; 1

Fig.:3 i s':rtransverse sectional view taken on theline 3-3 of Fig; 2;

Fig I3 taken on Fig. 6 is an end elevational view of the switch meehanismshown in Fig.3;

Fig. 7. is a s'ideelevati'onal view,- partly in section of the structure of'Fig. 6';

Fig. 8 isla transverse sectional viewtaken on the line'88 of-Fig. 7;:

Figs. 9. and 10- are similar views taken respectively on the lines 9- 9 and 10'10 of FiL'.'7 :1-

A 11 is n tlctail-longitudinal sectional Iviewof the stationnrvand movable switch elements; thesectional plane beingtaken on the line 1111 of Fig.6}

Fig. 12 is a similar View showing the manner of mounting the contact supporting rings 311(12):.- has been moved to; disengage theof the casi11g ;51: may lie-closed by a. remo\-'-:-.;

- ona tower-=12. (F ig. 1) comprising vertieal- 51. A rod 55 extendsmlownwardlykfrom the ;lye \tending members14and15 which-are se--. lower-endijofi-the oorej member 48 and it ad after.

on he switch a rms, the sectional plane being lower ends of the brake discs 35 and 3G a re n- (alien on the line 1f212 of Fig. 6; and terconnected by a toggle-joint 43 adapted to Fig: 131's aid'iagran'unatic, view of circnit-s be actuated by alink 44, which is secured to and. apparatus embodying myinvention. a pivoted lever 45 movable in avertieal plane, For purposes of illustration, I have shown whereby the brake bands 35 and 36 may be a pra ti al embodimentof my invention, as actuated outofgengagement with the brake applie'cl to the opeirationof a high-\-'oltage disk 34 against theilforc "offf l 'c" spi' i ng 39 switch 1 'ofthe type disclosed in Patent No. when the 1notorj9 isto mo-- freeiy. 1,415.708 wanted May 9, 1922, to R. Renhe. The brakc ielcasinglever45finav be ac- In generaf the switch therein disclosed eomtuatecl by means of a master relay 46 (Fig. 5)

prises a pair of pivotally mounted insulators which comprises a cylindrically formed ac- 2 and 3 (Fig. 1) carrying cooperating eontuzlt ng;-\i'i i a;rl ng- 4 7 and a core member 45 tact elements 4 and 5 movable in parallel movable axially thereof. A secondary aeplanes into andout of engagement under the 'tu ating winding-49' encircles the actuating reciprocal movement of linkage tiywhicli ter- Winding; 4'7 and it is designedto actuate the minutes in a common vertically movable shaft movable core 48 when the. actuating winding 7, as set forth in the patent in question. :The 47 is clcenergized; as set forth hereinafter. The shaft '7 maybe sueccssh-"ely actuated to open actuating winding 47 and49'as well as the and to close the switch L by:means of adriv- 1.11iovablecore member 48 are enclosed by a ca ing motor. 9- ig. 2) through intermittently ing 51 ofmagnetic material, the latter having actuating:mechanism 11, or directly by hand -:-1 perforation-52 inthe-basethereoif for the. operation. .when a clutch. lever 75 (Figs; 1- m0vable core-member- 48. The top pore; n

driving motor 9 .fromzthe associated mech-. able.cover53.-flThe'core-memben 48,may be .a-nismz 11-, all as willappear morelfull' hereinsnpported insitsiloweriposition one project- Y Ting-end portion of'a=member=54awhieh is de- -;The s witchmechanism -1;'may bemountedtaehably securedaon tlienbase of :the casing euredi in'spaced relation byntransvemely'ex-x:jnstablykcarries tlieritree; end ofgthe brake tending-members 17.;Ea-nd 18. :The spaced; releasing-lerelt45;;whereby:the latter 'nay be members 917;; and 18: provide: a rigid support move'diln: aecordanceiwifilnthewertieal movefor{ a eancasinm 19;hajvin. ansinte ral base-i men-t of=theicorememberi48.; 1 t i D h D a portion 20 and a removable.eover portion 21- ;.=-;'l he' eovengmembert 5.3; .ofthe casing .51 .is

to provide; aclosecl compalitm'ent. for the: in-- f-prqyided'with an al ial'plojction 56 ex e d- .termrttent-ly aetuat-inmgearingyll. The momg into thebase of the magnetizing winding tor 9 is mounted on ai braeket 22;lwn1ch 1s se-:;- 47;, said project on;56 being provided w th an cured to a, wall 230itheg'ean casinglt), andiaxial pl'ioration j57 a dapted-v to -s lirlably;1rc

A shaft- 25 i of the-motor ,9; carries va. flanged coliz aictzmemberl 5494. ,-';The jeonta'ct member; 59

hub portion 26 (Figada-ptod atmengage a; land thest-emifi greiinsnlatingly:supported-in correspondinglyrecessedbrakedisk 27 Whicll= their; lower:posifiion by af base; member 6'1 is rigidlyi 'S'BQured-on-one endofia ,WOrinshaft which is mounted on spncing b GQTaQfL- 1: 2-8,; Woringshafi-28 is journalediniabe'aringz, 63 secjure dto theitopiside of th ecover mem- 29 formed in thesidevivall 23of-thfe gear c3S-;: [Fol-153 A:PifiniQi:Stationany eontact ,mem-

ing.;19 and ;al so.in spaded-be'aring's 31 and 32; hers: 34: Tandifiiareg-mounteddirectly above extending from the baseportion 20 of the ear; the cooperating movable-conta t memb r 59 ,casing, {a; worm 33 being keyed on the'por-J on; spring members 66} and :67, respectively,-

tion of the worm shaft= 28= intermec.iate the;.wliich are'secured to the instilatingbase bearing 31 an (l32.- e '2 ..jmelnbee61,whereby.agi eisticalmovement of In orderjofavoid-overtravel of the motor 9; theeontact memberfiQmaycause the stationwhenthe-highvoltage-switch 1 has been acryzontact membe ffifilr and 65 to be electrituated toteiti'ir" of its positions',;I provide aca y cd. vThevertieal movement of a brake structure 34, of which the brake disk the contact member 9'may be. effected by .27 is one element and a pair of brake bands immov b i Qlfe embert 48, Wind! g fi 35 and-36 constitutethe cooperating elements. the w -en (lithe e 53Wh8n either Of The brakebands 35-and 36' have their upper: h n g- Willdlngs is f ends pivot-ally mounted on pins 37 and'38, g d- T .eiiectr s er-o 'fl il respectively; which are carried by thc'side t f 9 g e g' wi or wall 23 ofthelgear casing 19. The bral e 15 t Cause l' 9 the hands 35- and-36min?be'normally actuated @0176 member 48,5Wl1ich ul t closing into resilient engagement-with the brake disk of the 3 n the Simultaneous release nca'ng an'adjnstable spring ex. tllBf-bl'ZL-k'l thefmotor 9 l0 1?- tending between projections 41 and 42 of the ,volve freely. brake bands 35 and 36, respectively. The The worm (Figsfland 3) is actuated by the driving motor 9 and meshes with a Wormwheel 6&5 which is revolubly mounted on a shaft 69 journaled in bearings 71 and-72 formed in the base. and the cover portions '77 of the gear casing 19. The handle 75 may be locked in a desircdposition, as shown at 78- (Fig. 1). The inner end of the shaft 76 carries a cam 79 which engages one end of a clutch. lever 81 pivoted at 82 to the base 20 o'i'the gear casing 19.-J-'1he. other end of the pivoted clutch leverz8l: terminates in a yoke portion having fingers 83 and 84 adapted to engage a slot 852 formed-in:arr-annular clutch disc 86. 1. -I -i-:

The clutch disc86'carries- pins 7 and 88" which are adapted to removably engage com--v plementary pairs'oi'borings89 -91iand 92--f 93 formed'in the womr-vvheel 68 andthe gearwheel 73, respectively Whenwthe-clutch-re-:.

" leasing handle 75 is so moved as toLcause-the cam 79'to actaa'te the pivoted 'cliitch lever'81,.

the pins 87 and 88 are actuat d' out oftheborings 92.and 93-'irr the; gear-wheel-73; so

that-the operative connection between the-lat- F application of the braking apparatus 34 to .the finalrsto'pping of the motor 9,,fr om causter and the worm-wheel. 68 is broken-" The resulting lateral movement-pf-the clutcli-disc 86 is resisted by a spring 9ythe opposit e ends' of which engage a plate-1 95 carried-by a progz vjcctin'g-hul) portion 96 ofthe worm-Wheel 68; and a flange 97 extending inwardly from; the inner surfaceof the clutch disefior Relativerotative movement between-' theiplate 95 and r the hub'96 may be avoided by means of a-pln 98,- 1' 5';

In order-to insure that-the-worm-wheel 68-: will imake a complete turn before the fpinsx87 a and 88 are actuated'into engagement witlrthe' borings 92 and 93' ofthe gear-iw'heel 73,- underlit ' 0f the ci-anlcshaft'l0l and it is operatively theaction ofthe'spring 94, I'spacethe. same at different radial distances fi'omtheshaft and SS'Were spaced equallyifrorn'theshaft) 69,

wheel 73 and 'the" motor-9 would be efiectedwhen th e worm-wwheel 68' had turned through one-half a revolution onlyuw'll'he'gear-wheel 78 which is actuatedbyu-the worm-wheel 68 through the operative connection: effected. bythe clutch pins 87 and 8S; meshes with. a gearwhecl 99. the latter being keyed'on a crank-- shaft 101 journaled in "bearings 102 and-103 formed in the base'and cover portions 20 and- 21 of the gear casing 19, respectively. A' crank 104is keyed on an outer end portion 105 associated by means of a link 106 with the lower end of the-vertically movable operating shaft 7. A bracket 107 extending from the top side of the gear casing 19 serves to provide a bearing 108 for the lower end of the operating member 7.

Since it is desirable that the operating member 7 be intermittently actuated by the motor 9, the gear-heel 73 and 99- are so designed that a complete rotation of the former causes a half rotation only of the latter. One method of accomplishing this desired result is shown in Fig. 2, wherein one-half of the pcriphcry of the gear-wheel 73 is formed to present a smooth surface 111 having the diameter of the pitch circle of this gear-wheel. The co-acting gear-wheel 99 is provided with oppositely. positioned sinoothportions 11.2

and 113 which are similarly formed on the periphery thereofand adapted toengage successively the smooth portion-1110f the gearwheel 68. 1

. The smoothpor-tions 1-11 112 and 113 are so designed that the'teetlr of the gear-wheel 73 engage the teeth ofi th e gear-wheel 99 for one-half 'arevolution only; the smooth surface 111 ofthe'gear-wheel73-engaging one or the other of the smooth portions 112 and 113 of .the-ge'arjovheel 99 folr the remaining half of. the revolution, vherebyithe; gear wheel 73=-may turn ffreelyi-for one-half of-a revolution; Thisf isFof; particular importance inasmuch -as-.-it--preventsthe over-travel of. the motorE-9,= froni. the instantof the ing the operation of 'the;- switch-actuating shaft/7 ,1 ,The crank is; so mountedon the either it's-open or closed T he high-voltage switch 1 may beinanual- 11y operated subsequent to the-actuation of ithelclutch-release handle 75; by-an operating handle (not show-n);'which-is;adapted; to engage spaced pins-1 14 mounted on the outer end'of an extension.- 115 iofithe driving shaft 69.- :The-extension:115;of the-shaft .69 may be enclosed by arousing;'116:constituting an integral projecting portion of the removable cover 21.' Access'm'ay be had to the clutch pins 1 14 through the casing116 by providing; an opening 117 in the outer end thereof, which may be closed by a hinged cap 118 adapted to be locked; as at- 119.

Since it is desirable that the (11" ing motor 9 actuate the high-voltage switch 1 just long enough to cause the same to move from one operative position to another, it becomes necessary to render the motor 9 automatically inoperative upon the completion of such movenia To this en I provide a el form f ill! lot:

limit switch 121 (Fig. 13) which operates substantiallyinstantaneously to open and to close a motor energizing circuit 122. limit switch 121 as well as switches 123 and 124, which control remote control circuits to be described hereinafter, are embodied in a single switch structure 125 which is so mounted on the projecting portion 115 of the shaft 69 as to be enclosed by the casing 116.

As shown in Figs. 3 and 6 to 12, inclusive, the switch construct-ion 125 comprises a stationary contact-carrying structure 126, a movable contact-carrying structure 127 and mechanisn'i 12S adapted to cause the successive actuation of the mbvable structure 127. The stationary contact-carrying structure 126 comprises a base portion 129. which is adapted to be secured to an outer face portion 130 (Fig. 3) of the gear cover 215and a tubular portion 131 which extends from the center of the base portion 129 axially of theshaft extension 115 and loosely engages the same. A plurality of contact-.

supporting arms-132 133, 134 and 135 extend from the outer-edge'of the base portion 12-9 axially of the tubularportion 1.31and they are spaced equiangularly about the same as acenter.

The contact-supporting-arm 132 (Fig. 11)

may be providerbwith spaced perforations- 137, 133 aiid'139. which are adapted to receive f insulating bushings 141,-the latter provid ng-- insulating mountings for the stem portions 142 of- 'stationary contact elements 143,144

and 145. The stern portion 142 of each Sta-.-

tionary'co ntact element terminates'at one endin' a hea'd' portion 146 having a beveled." contact-engaging face insulating block-148 is so formed as to provide an insu-" 'lating mounting for the headportion l lfi'ofiv stored energy; Icoinprisesfa ratchet-wheel 187 .whiclris. rigidly mountedon the outer .end of the several stationary contact. elements whereby the same may be ipsnlati igly supported imposition; "The otlier end=-:of.tl1e..

stem portions 142 of the stationary contact elements extends through 'and'beyond' the arm 132. each end portion being-threaded to" receive clamping nuts 149.-- The several nutsl49'are insul'atingly spaced -from the support-'- ing arms 1 32 by means of a member 151. -A- second nut 152 may be mounted 'on the threaded end of each stationary contactelement whereby an electric conductor may secured thereto. 5 Similarly, the arms 133, 134 and 135 are respectively provided with stationary contact.

elenients 15315415; 1561 57".158,.and 159-,1 61 -162, all as shown moreiparticnlan ly in F ig, 13 to be described niorefully hereinat'teri "Since the stationary-contact elements 1 l5-155158162 liein-a common nlane transverse to the axis of the actuating limit-switch 121. Similarly, the contact ole- The :gages a second tubular member 164, the latter being loosely mounted on the tubular projecting portion 131 of the stationary switch struc-- ture 126.: The tubular member 163 is provided with laterally extending flange portions.165, 166, 167 and- 168 8). The outer end of each flange is threaded to receive one end of a threaded rod 169 which extends longitudinally of the actuating shaft 115. Eachrod is provided with an insulating bushmg 171, whereby a plurality of rings 172, 17 3 and 174 may be'insulat-ingly supported thereon, as shown in Fig. 12. The several rings'are secured in spaced relation by tubular insulating elements 175 and the wholeis rigidly clamped in'position by means of nuts 176 mounted on the outer threaded end portion of the several supporting-rods 1.69. The ring 174 is formed with a-zpair of integral casings -178Iandi179;:whereby contact elements 181 and 182, respectively,.may be resiliently and removablyi supported therein.v The elements i=l81 and-l82 constitute-the movable contact 2 183%184and185-1-186-constituting the movable contact elementsof the-switches123 and 124; respectively; 1 nThe. mechanism 128.- which intermitten tly operateshni-the aim-m switch: structure 127 Ito cause; at tho move from one: contact-engaging position; to; another.- under the action f Tthe tnbularmember -164,;as byalocking screw at 188 (Fig. 10). The end of the actuating shaft 115adjacent ithereto rigidly carries an" arm- 189 (Figs) :on: the outer end of which is resrhent-lymounted a; p'aavlalQO adapted to en- =gageithe ratcheflwheell 187* and to move the same aswell as the tubular sleeve 164. A- cam 191, which is mounted on'the outer end .of-

the tubular projection 131 carried by the stationary switch. structure,- 126, serves .to disengage the-pawl 199 from the ratchet-wheel -=18'T"N vhen the extension shaft 115 has moved through apredetermined angle. .--The relative rotation obtaining hetween'the ratcheth 187 and the movable switch structure 127 may be :utilized-toustore energy in a spring 192 (Fig. 7-) which interconnects the two. whereby the movable switch structure 127 may beposit-ivelyactuated under the force of the spring 192indeplendently of .the actuating shaft115. i':

In order to release the-energy, which is st ed in thespring xlnringtliczeried 0f Inn the other. The base portion 129 of the stationary switch structure 126 is provided with a ilurality of equiangularly positioned retaining flanges 197, 198,-199 and 201 adapted to cngage'successively the locking shoulders 195 and 196 of the eccentric-strap 194 as the latter is moved under the force of the spring 192. The movable switch structure 127 is operativcly associated with the eccentric-strap 194 by means of a lug 202 which extends from the eccentric'strap 19-l into a slot 203 formed between the flange portions 167 and 168 of the movable structure 127.

In order to insure a rotative movement of the eccentricstrizp 194: sufficient to actuate the movable contact elements out of engagement with the stationary contact elements, when the eccentric- strap shoulders 195 and 196 have been "actuated clear of the retaining flange 197,- in event of theinoperation of the spring192, the eccentric 193 and eccentricstrap 194 areprovided--wit-h cooperating shoulder portions 204 and 2-05 (Fig. 9), respectively, so thatzthe eccentric-strap 194 is positively actuated by the actuating shaft 115 through the pawl and ratchet construction 187-191. S'uchact-uatiomhowever, is discontinued when the movable-contact ele-' ments 181 and 1820f the limit switch 121 have been actuated clear oft-he'cooperating stationary-contact elements, as will appear more fully'l'iereinafter.'

As the actuating'shaft 115 is-turned through one complete revolution, the pawl 190 engages thc'ratchet-wheel 187 causing-the same to turn andwind up the=spring 192. The-movemento'f-the ratchet wheel 187, however, simultaneo'us'ly causes a corresponding movement of the eccentric 193, resulting in a lateral movement ofthe eccentric-strap shoulders 195' *and'- 196. When the ratchet-wheel- 187 has moved through such angle as toestablish thedesired force in the spring 192, the shoulders 195 and 196 have been moved clear of theretaining flange 197, permitting the eceentric strap 194 to turn rapidly under the action'of thestrained spring 192, carrying with it the movable switch structure 127 whichis operativ ely associatedtherewith by means of the-lug 202.

Since the eccentric. 193 is prevented from following the movement of theeceentric-strap 195 is just actuated clear of the retaining flange 197 to the maximum value obtaining when the shoulder 195 engages the succeeding flange 198. Hence, as the eccentric shoulder 195 is moved from the retaining flange 197 to the next succeeding retaining flange 198, it is moved outwardly and finally engages the latter.

The cum 191 is so dcsigned that, when the eccentric shoulder 195 engages the locking flange 198, the pawl 190 is actuated clear of the ratchet-wheel 187, thereby releasing the opposite end of the spring 192. The etl'ect of releasing this end of the spring 192 is to cause the eccentric 193 to move in the opposite direction forcing the eccentric-:-;trap 194 radially outwardly until the locking flange 198 is fully engaged by both of the eccentric' strap shoulders 195 and 196. -The' reverse movement of the eccentric 193 is limited by a pair of cooperating shoulder-S206 and 207 formedon the eccentric strap-19 i and the eccentric 193, respectively, whereby tension-is maintained on the spring 192 at all times.

When the shaft/ 115 is moved through an other complete turn, the foregoing cycle-of operation is repeated; so that the'movable switch structure 127 1 nay be successively actu ated from one operative'positio'n'to another for each complete turn or theactuating shaft 115. Attention is directedtoth'e'factthat the movement of the switch" structure 1% from one operativeplos'ition: to another isvery rapid, being ineffect a snappingfrom one pos tion-to anotherl As hereinabove pointed out, should the spring-192' fail to move the movablfeleontacts from anyone circuit e'losing position, the shoulder 204 of the eccentric 193 engages the" shoulder 205 on th eccentricstrap 19s and, under the action of the actuati1 2 '$liaft '-1 15, positively moves the movable 'swit'c'hstructure 127 out of the circuit-closing i if i' Referring to the diagrammatic embodiment, of myinvent-ion shown in Fig. 13, the'driving motor 9 is connected by conductors 208 and 209', which constitutethe previously-noted motor-energizing-circuit 122,- to the positive and negative bus conductors 211 and 212 re- 'spectively of a 'glistantlv' located; contro'l bns 213. The conductor 209' includes inseriesci'rcuit'rlat-ion the master relay 426 shown in Fig: 5 as-well as' the' a'ctuating winding-47 thereof, so that the movable c'ontactelement 59 may be held in 'its'circuitfclosing position wheh winding-47 is energized. The conductor .209 also includes-the limit switch .121,-.the stationary contact elements.145-155 and 158162thereof being connected, respectively. by jumpers 214 and 215 (Fig. 6).

The operation ofthe movab e contact elements 181 and 182 of the limit switch 121, as the same are moved from one operative position to another, is merely to open and to close instantaneously the motor energizingcircuit 122. This instantaneous opening and closing of the motor-energizing circuit 122, however, is sufficient to cause the deenergizaton of the actuating winding 17 of the master relay .46 and, as previously pointed out, results in the contact element 59 moving out of engagement with the stationary contact element 61- and to completely interrupt the motorenergizing circuit 122.

A system of remote control 216 for the master relay d6 coi'nprises a conductor 217 which extends from the conductor 208 throughthe actuating winding 19 to a jumper 218 of the switch 123, said jumper 218 connecting the stationary contact elements 144 and 154 in parallel relation. The remaining stationary contact elements 157 and 161 of this switch are connected by conductors 219 and 221 through remote- control switches 222 and 223, respectively, to a common conductor 22 1 electrically connected to the bus conductor 212. The remote- control switches 222 and 223 may be located at a distant operating station.

In order to indicate whether or not the high-VOltfl-g switch 1 is open or closed, I provide a pair of indicating lamps 225 and 226, which have corresponding terminals 'connected by conductors-227 and 228 to the bus conductors 212 and 211, respectively, the rem aining terminals thereofbeingconnectedby conductors 229 and 231-, respectively, to a common conductor 232 which terminates on a j-innper233 of the switch 12 the .jumper 233 serving to connect in ,parallel relationthe stationary contact " elements 156 and 159,. The remaining stationary contact elements 143 and 1530f this switch are connected by conductors 234 and 23 5, "respectively, to the conduct0rs'208'and 209. h ,wWhen the remote-control switch 223 15 closed, a circuit 'is completedwhieh extends from the bus conductor 212 throughthe conductor 224, the remote-control switch 223, the conductor 221, the stationary ,and movable contacts elements 157'-184,,l83144r of the switch. 123, the conductor 217, the energizing winding 49, andthe conductor 122 to the bus conductor211. The effect of closing thiscir cuit is, therefore, to cause; the core member 48 to actuate the movable switeh'elemeirt f fi into engagement with the stationary-contact ele- Inent 64 and 6 5 to complete the motor-energizing circuit 122. I

The vertical movementof'the core member 48 incideritto the energization ofth'e actuat 'ingwinding.49'causes'the release ofthe brake mechanism '34, as previously pointed out,

whereby the motor-9 may revolve free of the same. The motor 9 then-operates to turn the gear- Wheels 73 and 99. When the gear-wheel '73 has moved through its effective portion of a revolution,'the'operating shaft '7 has-been so moved as to actuate the high-voltage switch 1 from one operative position to-another. 1 The gear-whcel fails to actuate the gear-wheel 99 during the remaining hall'- rerolntion by reason of theengagenrent of the smooth surface 111 thereof with the smooth portions 112 or 113 of the gear-wheel 99. As the gear-Wheel 73 moves through its ctfective portion of a revolution, the pawl 1 engages the ratchet-wheel 187 causing the twisting of the spring 192. This storage of energy in the spring 192continues until the high-voltage switch mechanism 1 has been moved from one operative position to another at which instant th'en'iovable contact elements of the switches 121, 122 and 123 snap from engagen'ient with one set of stationarycontact elements into engagement with a su'cceeding set of stationarycont-act elements, as illustrated bythe solid and dotted lines, respectively, in Fig. 13. The momentaryin terruption in the motor-energizing circuit-122 renders ineffective the actuating winding/l7 with the result that the movable contact element 59 moves out of engagement with the stationary contact elements 64 and (Soto completely interrupt the motor circuit 122. The simultaneous dropping of the core 48 results in the application of the notor brake 34, so that the motor 9 is broughtto rest without an undesirable amount of overtravel.

The operation of the switch 123 from the solid line position to the dottedline position causes the remote control switch 222 to become operative and the remote control switch 223 to become inoperative, inasmuch asthe conductor 221 now connected to a dead-end o-f'the switch 123. Similarly, the operation of the switch 12% fromv the solid line position to the-dottedline position renders efiective the indicating flamp 225 ;and the indicating 1331113226 ineffective. When the high voltage switeh mechanism-1 is to be moved toits original-position, "the remote control switchi-222 is actuated- While 'I have shown only one embodiment of my invention for purposes of describing the same and illustrating the;prineiples of construction and operationthere'ot, it is; apparent that various changes and modificationsmay be made therein fwithout departing from thespirita nd scopegof fmy invention, and-I desire, therefore,-that'only such limitations shall be imposed thereon asare indi cated' in the appended claims or as are demanded by the prior art;

I-claim-z r i i 1. In combination, a driven shaft,- a d-ri-ving shaft, 'inechani'sm for so operatively -associa't-ing said drivenshaft and saiddri-ving shaft that the former is intermittently actuat'ed, a clutch for rendering ineffective-said mechanism, whereby said driven -sfha'tt may 'be operated independently "of said drivin-g shaft, and limit switch-actuated by said driving shaft.

2. Apparatus of the character describe d comprising a driving shaft, a limit switch operatively associated therewith, a driven shaft, intermittent gearing operatively associating said shafts, and a switch connected to be actuated by said driven shaft.

3. Apparatus comprising a driving shaft having a gear wheel, a driven shaft provided with gear wheel, said gear wheels being so formed that one is intern'iittently actuated by the other, and a high voltage switch connected to be actuated by said driven shaft.

4. Apparatus of the character described comprising driving means, a switch to be actuated thereby, mechanism for operatively associating said driving means and said switch including intermittent mechanism, whereby said driving means may have a maximum range of travel independent of said switch, and a limit switch for controlling said driving means.

5. The combination with a high voltage switch to be actuated, of a driving motor, and means for operatively associating said motor and said switch comprising a Wormgear drive and intermittent gear-Wheel mechanism connected to be actuated by said drive.

6. The combination with a high voltage switch to be actuated, of a driving motor, and means for operatively associating said motor and said switch comprising a worm-gear drive and intermittent gear-wheel mechanism connccted to be actuated by said drive, said drive and said mechanism being interconnected by a clutch.

JOHN H. DILKS.

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