Letters Patent is: 1. In an electric snap switch, in combination, a molded insulating block o-f substan- 110 tially cylindrical contour, said block having a diametrical open slot extending inwardy from one end thereof, said slot having an enlarged portion intermediate the eiids 'Llhereof, a contactor seated within said slot 115 and having opposite end portions projecting from said block, said contactor having an enlargement to seat within the enlarged portion of said slot to restrain the former against endwise displacement, the other end of said 120 block hai,ing a plurality of notches arranged in diametrically opposed pairs, the bottom walls of said notches bein- inclined in a common direction eircumferentially of said b][ock, the vertical end walls of one pair cf 12ti notches being alined with the longitudinal center line of said slot, a concentric spindle integral.with said block aiid extending fron-i the last mentioned end thereof, a ratchet plate rotatable on said spindle, said plate havi ng 139

4 1,815,172 integral inclined lugs adapted to jointly engage the end walls of said notches upon rotation of saicl plate in one clirection and to ride out of said notches upon rotation of said plate in the opposite direction, and means for e,ffecting rotation of said plato in said directions alternately. '2. In an electric snap switch, in combination, a molded insulating block of substan10 lially cylindrical contour, said block having a diameirical open slot extending inwardly from one end thereof, said slot having an enlarged portion intermediate the ends thereof, a contactor seated within said slot and havincr 15 opposite end portions projecting from saia block, said contactor having an enlargenient t,o seat within the enlarged portion of said slot to restrain the former against endwise displacement, the other end of said block hav20 ;ng a pltirality of 'notches arranged in diametrically opposed pairs, the bottom walls of said notebes bein(y inclined in a common direction eircumife@entially of said bloclc, the 25 in(y- alined with the longitudinal center line of el said slot, a concentric spindle, integral witb said block and extending from the last mentioned end theileof, a ratchet plate rotatable on said spindle, said plate having integral in30 --lined lugs adapted to jointly engage the end walls of said notches upon rotation of said plate in one direction and to ride out of said notches upon rotation of said plate iii the opposite direction, means for, effecting rota35 1 ,ion of said plate in said directions alternately, said ineans including a pull chain attached to said plate to effect rotation thereof in the first nientioned direction, a coiled torsion spring having one end in engagement 40 vith said plate to bias the latter in the oppo-' site direction, an adjusting plate slidably motinted on said spindle and having an inwardly extending lug with which the other end of said sprinis adapted to engage, said 45 idjusting plate a]7so having a plurality of outwardly exteiididg Iii(rs, and a bearing plate for s@id spindle, sai4 bearing plate having slioulders with which said last mentioned lu(Ts ,ire adapted to engage. to 3. In a rotary pull switch@ in combination, a one-piece molaed insulating base having approximately cylindrical encl portions and a relatively shallow intermediate portion, said last mentioned portion having a substantially 55 "ylindrical recess therein, a plurality of diaiiie"rically opposed pairs of ratchet teetb formed integrally with said base and surrotindid(y said recess, cert@qin of the diametri60 65 Ily opposed ratchet teeth having fixed con.@a ,,let elements superirl osed thereon, a cylindrical molded insulatin@ block rotatable within said recess, said block havin a diametrical open slot extending inwardly from the lower end thereof , sai@d siot having an enlarged portion intermediate the ends thereof, a contacyertical end walls of one pair of notches be- said lu(rs are adapted to engage. tor loosely seatod within said slot and having opposite end portions projecting from said block and adapted to overlie each pair of ratchet teeth selectively, said contactor having an enlar(yement tb seat within the en- 70 larged portion of said slot to restrain the former against endwise displacement, the other end of said block having ratchet teeth formed therein, a spindle integral with the last mentioned end of said lock a plate ro- 7 r, tatable on said spindle an having integral, inclined lugs adapted for driving enffagement with said last menti ed ratchet teeth upon rotation of thp, former iii one directioia aiid to disengage said teeth upon rotation of so said plate in the reverse direction, a, pull chain and sprincy means for effecting such inovemenils of salpd plate, means for adjusting the tension of the spring, said means comprising a plate rotatably and slidably sup- 85 ported on said spindle, sp'aced lu,as struck out-,vard from said plate, and a bearing plate ly or said SI)indle having shoulders with which 4. Ii@ a rotary pull switch, in combinati.on, i)o a olie-piece molded insulating base havin(r approximately cylindrical end portions and a rel,,ttively shallow intermediate portion, said la t mentioned portion havin(' a subtn stantially cylindrical recess therein, a pllirality of diametrically opposed pairs of ratchet teeth formed inte(,"rally with said base and surroundinc, said recess, certain of the di.ametrically -opposed ratchet teeth p havitig fixed contact elements superim osed 1 3 thereon, a cylindrical molded insulatilig block rotatable within said recess, said blocIT having a diametrical open slot extendin- inwardly from the lower end thereof, said slot having an enl,,tr-ed portion intermediate the ends thereof, a (@ontactor loosely seated witliin said slot and having opposite end poi,tions projecting f rom said block and adapted to overlieeach pair of ratchet teetliselectively, said contactor having an edlargeiiient Ila to seat within the enlar(red poi-tion of said slot to restraiii the form-er a-aiiist endwise displacernent, the other end Z-1 of said block having ratchet teeth formed therei n, a spindle integral with the last mentioned end 1,,5 of said bloclk, a plate rotatable on said spindle and liaving inte ral incliiied lu-S adapt9 n ed for driving enaagement with said last el mentioned ratchet teeth upon rotation of the former in one direction and to disengage said 120 teeth iipon rotation of said plate in the reverse direction, a pull chain and spring means for effecting such movements of slid plate, rneans f or adjusting the tension of the sprinbly a " said meftns comprising a plate rotata nd i2g slidably supported on said spindle, spaced lucrs struck outwardly from. said plate, a beta'ring plate for said spindle liaving shodlders with ' which said lugs are adapted to engage, one end portion of said insulating base 130

1,815,172 having a plurality of radial notches formed therein at points spaced from the edge thereof, and a cup-shaped metallic supporting elernent having inwardly offset lugs in interlocking engagement with said not,ches. 5. In a rotary pull switch, in combination, a onepiece molded insula.ting base having ap,proximately cylindrical end portions and a r6latively shallow intermediate portion, 10 said last mentioned portion having a substantially cylindrical recess formed therein, a plurality of diametrically opposed pairs of raichet teeth formed integrally witli said b,ase aiad surrounding said recess, certain 15 of the diaraetrically opposed ratchet teetfi having fixed contact elements supe@imposed thereon, a cylindrical molded insulating block rotatable within said recess, said block having a diametrical open slot extendinu in20 wardly from the lower end thereof, said slot having an enlarged portion intermediate the ends thereof, a contactor loosely seated within said slot and havina oppo@ite end portions projecting from sai '-'@d block and adapt2r) ed to overlie each pair of ratchet teeth selectively, said contactor having an enlargement to seat within the enlar-aed i)ortion of said slot to restrain the forii@er @gainst endwise displacement, the other end of said block 30 having ratchet teeth formed therein, a spindle integral with the last mentioned end of said block, a plate rotatable on said spindle and having integral inclined lu@s adapted for driving engagement with said last men35 tioned ratchet teeth upon rotation of the former in one direction and to disengage said teeth upon r6tation of said plate in the reverse direction, a pull chain and spring means for effecting such movements of said plate, 40 means for adjustin- the tension of the sprin said means comprising a plate rotatabl and slidably supported on said spindle, spaced lugs struck outwardly from said plate, a bearing plate for said spindle -having shoul45 ders with which said lugs are adapted to engage, one en(i portion of said insulating base havin- a plurality of radial notches formed th4E@rein at points s@aced from the edge thereof, and a cup-shaped metallic sup50 portino, element havin- inwardly offset lugs in inte@locking engagement with said notches, said supporting elenfent having perforations and said insulating base havino, passages to provide clearance for the pull chain and the 55 terminal wires of the switch. 6. In a device of the character described, in coiiibination, a one-piece riaolded insulating base having approximately cylindrical end portions ancl an intermediate portion of seg60 'mental form in cross section, pull switch mechanism located within said intermediate portion, a punched plate of insulating xnaterial bridging said end portions and adapted to retain the switch parts in assembled rela65 tion, qenter and screw shell lamp contacts secured to one of said end poi-tions, and a cupshaped metallic support wifhin which the other end portion is adapted to fit, said last mentioned end portion and said support having integral interlocking elements to prevent To relati ve movement therebetween. 7 . In a device of the. character described, in com bination a one-piece molded insulating base having approximately cylindrical end porti ons and an intermediate portion of seg- 75 ment al form in cross section, , puH switch mec hanism located within said intermediate porti on, a pilncfied plate of insulating material bridging said 6nd portions and adapted to retain the switch parts in assembled rela- 50 tion, center and screw shell lamp contacts secure d to one of said end p6rtions, and a, cupshap ed metallic support within which the othe r end portion is adapted to fit, said last menti oned end portion and said support hav- 85 ino, integral interlockin" elements to prevent rerati ve movement the@'ebetween, certain of said elements having clamping engagement with one end of said insulating plate to retain the latter in position. 90 8. As an article of n-lanufacture, a movable conta ct carrier for snap switches, said carrier consis ting of a c@lindrical block of molded insulatin g material, said block having a diametric al open slot extending inwardly from --5 one end thereof, the other end of said block hatvih neg a plurality of equally spaced inclined no c s formed therein, the vertical end walls of two of said notches being alined with the longitudinal center line of'said slot, and ti ioo concentric spindle integral with said block and extending from the -last mentioned. end thereof. 9. In a device of the character described, the combination with a one-piece insulatino, los base adapted for production by a straight line molding operation, said base comprising opposite end portions of substantially cylindrical contour and an intermediate portion of substantially see,@nental form in cross see- lio tion, said intermediate port,ion and one of said end portions haviilg perforations therethrou( yh, a, plurality of stationary contacts positi @ned on said base, and securing elements for said contacts, said elements pene- 115 trating . said perforations in planes at substantia lly right an(Tles to each other. 1 0. In a device @'f the character described, the combination with a one-piece insulating base adapted for production by a straight .2o line molding operation, said base comprisilig opposi te end portions of substantially cylindrical contour aD.d an intermediate portion of substantially segmental form in cross section, said intermediate portion @nd one of 125 said end portions having perforations therethroug h, a plurality of stationary contacts positio ned on said base, and securing elei-nents for said contacts, said elements penetrating said,perforations in planes at substantially i.@o

6 1,815,172 riglit a,ii-les to eacli other, oiie of said perfoillitioiis I;eing foiined b a slot exteiiding inw,ir(Ily fi-om the peripTer3, of the last mentiojie(l cii(I portionit the juiietioil of the latter witli stid iiiterii-lediate portion. 11. In a device of the character described, !li coinbination, a one-piece molded insulatilig base. liaving approxiinately cylindrical cild poi@tions aiid an intermediate portion of 10 segiiieiital form in cross section, pull switch jilecliaiiisn,i located witllin said iiitermediate poi-tioii, a punched plate of instulating matei-itl I)ridging said eiid portioiis and adapted to retaiii the switch parts in assembled rela15 tioii, e(,,llter and screw sliell Ian-ip contacts sectire(I to one of said end portions, a cupsli.il)ed iiietallic support within which the otlict- end I)oi@tioii is adapted to fit, said last iiieiitioiied end portion and said support hav20 in,r integral intei-locl<ing elements to prevent i-el,ttive iiioveiiieilt tlierebetween, and a tubulai- iiisulttiiig iiiember slidable over said instil,it,incr base to enclose said switeli meeliailisiii al7id sai(I lamp contacts, said tubular 25 iiieiill)er being a.dapted to rest upon the upper ed(,re of said support. 12. Iii a pull chain lamp socket, in combinationi a one-piece molded insulating base havin (-r Slibstantially cylindric,,tl end portioins and 30 Ili ititermediate portioii of segmental form in cross section, a cylindrical recess formed in sai(I intermediate portion tind ratchet teeth foriiied integrally with s,,tid base and surrotiii(Iiiia said recess, a cylindrical molded 35 iiistilitiii,- block rotatable within said recess, said I)Iock havin- a. slot and a contactor of eiretilar cross see@ion engaged by the walls of sai(I slot and retaiiied thereby in engagement witli said rttchet teeth, a rotary operating 40 plate having ratchetino, eiigagement with said b k, a, pull chain f(@r effecting rottition of s i I)Iate in one direction, a spring to bias s i plate for i-otatioii thereof in the reverse rection, t puiiel-ied plate of insulatin- mate45 r il bridgiii- the end portions of the base -ind adapted to retain the aforemeiitioiled swit(@li parts iii asseinbled relation, center and sere-,v shell lamp contacts stiperimposed upon oiie of the eiid portioiis of said base, a wir50 in- teriiiinal for said screw shell eontact, a el s%vitch coiitact to be electrically coniiected '%Vitli said center contact, and mea'iis penetratiiiff said end portion of the base to @eciire all of said parts in asseinbled relatiod and to 55 provide aii electrical coiineetion between said switch contact -.ind said center contact. 13. In a pull chain lamp socket, in combination, a oiie-piece molded - insulating base having substantially cylindrical end portions and 60 an interinediate portion of segmental fqrm in cross section. a cylindrical recess formed in said intermediate portion and ratchet teeth formed inte,-rally with said base and surrounding said recess, a. cylindrical molded 65 insulatidg block rotatable within said recess, said block having t slot and a contactor of circular cross section engaged by the walls of said slot and retaiiied tliereby in eliL)",ILrement with sa-id ratchet tectli, a rotary operatin plate litviiig ratelictiiig engaoemeiit witb 'O siid block, a, piill cliain for effect7in- rotition of said plate in one direction, a spring to bias said plate for rotation tliereof in the reverse dii-ectioii, a, punched plate of insilliti-ng material bri(Igirig the end portions of the base 75 an(I ad,,tpted to retaiii the aforementioned switeli parts in assen-ibled relation, center an(I screw shell lamp contacts superimposed upoii one of the en(I portiolis of said base, a wiriiig termiiial for said screw shell contact, 80 a switcli contact to be electrically connected wi@lli S,,ii(I center coiitact, means penetrating said end I)oi-tioii of the base to ,zecure all of said parts iii assembled relation and to provide, an electrical connection between said 85 switeli contact an(I said center contact, a seeonci switch coiitact, a wiring terniinal, means penetratin(r the iiitermediate portion of the base to secure said contact and terminal in position, a cup-shaped supporting member 90 into whi6h the lower end portion of said base is adapted to fit, said elid portion having ledges formed in the periphery thereof and said supporting member having integral inbent portions engag,,in a'd ledges to hold 95 em% s 1 said base and said m er against movement relative to each other. 14. A pull switch niechanism comprising, in combination, a one-piece molded insulating base hovirg a substantially cylindrical 100 recess formed therein and a plurality of diametrically opposed pairs of ratchet teeth formed integrally with said base and siirrounding said recess, certain of said pairs of ratchet teeth having fixed contaets superim- 115 posed thereon, a contactor adapted to selectively bridge each pair of ratchet teeth, said contactor comprising a conductive rod of circular cross section having a peripheral enlargement intermediate the end s thereof, a 110 molded insula,ting blo-ek of substantially eylindrical contoiir adapted for rotation 'Within said recess, said block having a diametrical slot in the lower end thereof@ the side walls of s@id slot being adapted to straddle 115 said contactor for driving enga ment with the latier aiid said slot having slroulders for engagement by said enla@gement of the contactor to preve-nt endwise displamment of the latter, said block having a plurality of 12'3 inclined notches formed in the upper end thereof, an operating plate comprising a, single sheet metal stamping having a pluraety of integral lugs struck downwardly therefrorn for cirivingengagement with the 125 walls of said notches upon rotation of said plate in one direction, gaid lugs being arranged to disengage said notches upon rotation of said plate in the reverse direction, a forked lug integral with said plate and bent 1"0

upwar,dly in a plane radial to the axial center of the latter, said lug being bent to hook form to provide a catch f(>r the, end ball of a chain, and a second integral lug bent ,5 upwardly in a plane tangential to said plate, said last mentioned lug having the end portion thereof bent outwardly whereby the same is adapted to act as a guide rail for the chain. lo 15. A pull switch mechanism comprising, in combination, a onepiece molded insulating base having a substantially cylindrical recess formed therein and a plurality of diametrically - opposed pairs of ratchet teeth i5 formed integrally with said base and surrounding said rejess, certain of said pairs of ratchet teeth having fixed contacts superimposed thereon, a contactor adapted to selectively bridge each pair of ratchet teeth, 20 said contaetor comprising a conductive rod of circular cross section having a peripheral enlargement intermediate the ends thereof, a molded insulating block of substantially cyendrical contour adapted for rotation 215 within said recess, said block h 'ng a dia 9'v' metrical slot in the lower end thereof , the side walls of said slot being @dapted to straddle said contactor for driving engagement with the latter and said slot having 3o shoulders for engagement by said enlargement of the contactor to prevent endwise displacement of the latter, said block having a plurality of inclined notches formed in the upp@r end thereof, an operating plate com3,5 prising a single sheet metal stamping having a plurality of integral luos struck downwardly therefrom for driving enga-ement with ihe walls of said notches upon r@otation of said plate in one direction said lugs being 4o arranged to disengage said notches upon rotation of said plate in the reverse direction, a forked lug integral with said plate and bent upwardly in a plane radial to the axial center of the latter, said lug bein'g bent to hook 45 form to provide a catch for the end ball of a chain, a second integral lug bent upwardly in a plane tangential to said plate, said last mentioned lug aving the end portion thereof bent outwardly whereby the same is adapt5o ed to act as a guide rail for the chain, a torsion spring ha ' a projectingend for v'ng engagement with said first mentioned lug, 9, tension adjusting plate having a, luz with which the other end of said spring is adapted 55 to engage, an abutment against whicli said adjusting plate is pressed by saicl spring, and cooperatively engaging p@As on said abutment and s@id adjusting plate to retain the latter in any one of a number of adjusted 60 positions. 16. ]In a swit6h mechanism, in combination, a movable contact carrier comprising a cylindricgl block of molded insulating mater . ial, said block having a. diametrical pas65 sage therethrough, a contaet rod of cylindri1,815,172 7 cal cross section rotatably positioned within said passage and having its opposite end block, the upa plurality of d therein, the 70 g inclined in a common directi concentric spindle integral with sa 4 block and extending from said upper end thereof. In witness whereof, I have hereunto sub- 5 scribed my name. WILLIAM C. TREGONING. 80 85 90 95 100 105 iio 115 120 125 130

-Patenteal Yuly 21, 1931 UNITED STATES PATENT OFFICE WILLIAM C. TREGONING, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO CUTLER-HAXMER, INC., OF XILWAUKEE, WISCONSIN, A CORPORATION OF DELA@VARE .ELECTRIC FULL SWITCH XFCHANISM Application filed December 21,1929. Serial No. 415,853. This invention i,elates to in-iproveinents in electric pull s-%i,itch mechanism, and the invejitioii further relates to in-iproven-ieiits i-n electi,ic Iii)ip socli:ets havin- my novel switch iiiecli,tnisiii al)plied theret@.' @1) Aii object 6T the invention is to provide ,in iiiil)rove(I switch inechanisin havin" a relatively siiiall -iiuiiiber of pai-ts wliieh are of iiilexl,)eiisive cojistruction and wilieli inay be 10 i-eadily aild inexpensiv6ly assel-nbled. .A,nother object is to provide a switch mech-iiiisn-i the parts of wliieh are of extren-iely st,i-ii-dy coilstructioii aiid which is trustworthy iii op@ration. ]5 Aiiotlier object is to so construct and arraii-e the parts of the switch mechanism as to insure a-aiiist fouling of the operating cli.iin with respect thereto. Another object is to provide a novel form 20 of iiisiilatin(r supportin- base for the switch iiice,hanism. Aiiother object is to provide novel means for,issembl.y of t lamp socket with respect to the switc-h i-nechanisiii, and to provide ' t 25 novel foi-in of support for the device as a Nvliole. Otlier objects and adv-,intages of the inveiitioji willliereinafter ippear. The accoinpanying di@awings illustrate an so eiiil)o(Iiiiieiit of the invention which will now I)e (lesci@ibed, it being understood that the ini7eiition is susceptible of embodiment in otlier foriiis witliout departing from the scope of the ippendecl claims. 85 In the (Irawings, Pioure 1 is a side elevation of a combined lamp socket and pull switeli inechanism constructed in accordaiiec witli n-iy invention@-the cylindric,,ii enclosiii,)@ sliell or tube bein- shonvn in section. 110 li'i- 2 is a vertical sectional view, lookincr ill tlle direction of Fig. l@--and certain Of the parts being sho-wn in elevation. Fig. 3 is a vertical sectional view in a plane at ri,-Iit angles to ll'ig. 2,-certain of the @5 switch parts being shown in elevation. l@ig. 4 is a perspective view, in separated ilelation, of the several parts (@f the, lamp socket and switch mechanism illustrated in Figs. 1, 2 and 3. b,i(r @ll 5 is a side elevation, on a reclueed sctl6, loolfil- in a direction OPPOsite to that of 60 1 - the en'closing tube being omitted. Fi-. 6 is a perspective view of one of tlic switch contacts and the clarnping eleiiieiit therefor. 55 Fig. 7 is a similar view of the otlier switeli contact and the combined clamping and terniinal element therefor, and Fig. 8 is a bottom plan view of the iiisulating block or carrier for the movable contactoi 60 of the switch. Refer riny to the drawings, the numeral 15 designates in general the one-piece molded insulating base of the switch, said base havin ,@ end portions 16 and 17 of approximately (;5 lindric al contour and a, relatively sliallow intermediat e portion 18 of substantially se'T"lelltal forin in cross section. Formed wit-hin said interinediate portion 18 is a cylindrical recess 19, and forined integrallv witli the 70 base aiid stirrotinding said recess are two pairs - of dianietrically opposed ratchet teeth 20, 21 and 22, 23,-tlie Iiigh ends of said rateliet teeth as sliown projecting above tlle flat face 24 of portion 18. 75 Openi ng onto the base or low'er eiid of ratchet tooth 20 is a recess 25 within which the shank portion 26 of the segmental contact 27 is adapted to fit,-the under surface of end portion 16 being recessed as indicated at 28 so to accominodate the perforated plate portioii 29 which is inte-ral with portion 26 and belit at right angles thereto. Also seated withiii the recess 28 and adapted for clainping engacrement with portion 29 is ,t metal piece 85 or plate 30 having a tapped opening 31 for cooperation with the shank of a screw 32, as hereinafter more fully desci-ibed. AS sho-wri the contact 27 is inclined at an angle correspondin.g'with the angle of tooth 20. Inte- 90

2 .l@ral with plate 30 and bent downwardly at right ancrles thefeto is a portion 33 having 9 ta]pped @pening 34 for a purpose to be described. 5 Opening onto the ratchet tooth 21 is a rece,ss 35 within which the perforated sliank portion 36 of the otlier contact 37 of the switch is adapted to se.at,-a perforated metal piece or piate 38 b6ing also se,,tted within said 10 recess rind held in clainping enua(rement with t5 LI portion 36 and the insulating base, as by M(,ans of an eyelet 39 or the like (Figs. 2, 3 and .7) ; the outer end of said evelet being preferably located within a cou@tersink 40 15 in the outer surface of the base. The contact 37 is likewise inclined at ati angle correspondin- to the an-le of tooth 21; the free eiids of tn 1:@, contacts 27 and 37 preferably extendinn slightly beyond the ends of their respective 20 ratchet teeth. Pl:ite 38 is provided with in integral angul;tr'lv exteyidinir wii-inte@@i-n.i,l I)oi@tion 41, said,portion bein- tapped to receive a bindin- screw 42. Superiniposed upon the end portioii 16 of 25 the bpse is the screw siiell contact 43 of the lamp socket,-tlie. ba,,;e flange 44 of said screw sh6ll being provided with a relatively wi(le diai-netrical slot 45 having an enlargeiyiciit 46 to permit,insertion of a one-piece metal 30 member havina a forked portion 47 for 11 clamping enga,Lleinent with the flan(re 44 of the screw shell and a wiring terminal portion 48 havin@ a tapped opening to reci@@ive t-he binding screw 49. 3,5 Also seated within t@e screw shell and overlyin- the forked portion 47 is a perfoFated insulatin- disk or washer 50. Siil)ei,imposed upon disk 50 is a perforated metal disk 51, which is preferably pi@ovided v@,itli a 40 dowiiwardly aiioled flange 52 to seat witliiii the perforation in disli: 50, said flange iii ttii-ii providing a seat for flush reception of the@ountersiiik liead of screw 32. As best sliown in Figs. 2 and 3, the iiietal disk 51 issliglitly 45 bulged tipwai,dly toward the center, or of somewhat frustoconical shtpe, to insui-e proper functioning of the screw head as the center contact of the socket. As sl)-own the screw 32 penetrates all of the 50 aforen-ientioned parts of the lamp socket, an(I passes throu(yh a perforation 53 in the end portion 16 @f the base, whereupon it is threaded into the perforation 31 iii plate 30 to secure all of said parts to each other and ra5 to the end portion 16 of the base. End portion 16 is provided with a cut tway portioii or recess 54 to accommodate the wlrln,(,r terminal portion 48., The movable contactor of the switch pref@ 60 erably comprises a suitable len(-th 55 of i t7l rod or wire of circular cross se(@tion@-said contactor bein(,- preferably composed of brass and havin(r an enlargenient 56 swa(yed or otherwise formed intermediate the ends 6,'i thereof. Contactor 55 as showii is of a leii(,th corresponding with the oiiter diameter of tite circul.ai-ly arranlred rateliet teetli 20 to 23. Adapted to i@t within the recess 19 is a cylindrical molded insulating block 57, said block havin@r a diametrical slot 58 openiilg 70 to the lower eiid thereof within whicli the contactor 55 is adapted to seat, sai(I slot 58 having ar. inte@media-te enlargement 59 to accommodate the eiilargement 56 . on said contactor whereby the latter -is held against 75 endwise displacement. The upper end of block 57 :s provide.d witl-. two dia,metrically opposed pairs of inclined notches or ratchet teeth 60, 61 and 62, 63,-it being noted that sa'id notches are inclined in a. common direc- 80 tion circumferentially of the block, and that the vertical encl walls of the opposed notelles 60 and 61 are in alineiiielit with the longitudinal center line of slot 58. Integral with block 57 and proje6ting cen- 85 trally froin the upper end tliereof is a spindle 64. Rotatable and slida-ble on said spindle is a metal plate 65, said plate having a plurality of integral inclined lugs 66 struck downwardly therefroin and adapted for 90 drivino, enga,,,ement v@,iih a, correspondino, iiuniber of the notches 60 to 63 upon rota-tion 2n t' of said plate in one direction. Also as will be apparent said lugs 66 are adapted to ride out of engagement with oiie group of said 95 notches and into en(vagemeiit with a, successive groilp of notches upon rotation of plate 65 in the reverse direction,--or in other, words to ratchet around sa-id block. Plate 65 is providecl with a forked Iii- 67 100 bent, upwardly therefrom at right angles and in a plane radial to the center of said plate@-@ the end cf said lu(-)- being bent or curved in the mariner illtistrwted to provide a ea-tch for the end ball of a pull chain 68. Also bent 105 upwardly from plate 65 at right angles and in a pl-.ine tan(,,ential thereto is a lu- 69 tlle end of which is bent outwardly in a pla-ile parallel to the plate to provide a -iiide rail for tiie pull cliain 68. t, .110 Superimposed ul)on plate 65 tiid adapte(I to bias the same into engageineiit -with the upper end of block 57 is a spring 70 surrounding the spindle 64, one an-ularly extending end 71 of sa-id spring being 115 adapted for engagement with the lug.6.7 to bias plate 6,5 to one extreme position. -The., other an-ularly extending end 72 of said spring is adapted for engageinent with the lug 73 which is strtick dowiiwardly froin a 120 plate -@4 wliich is also rotatable and slida-ble with respect to spindle 64. Struck lipwardly frgm plate 74 are a plurality of eqtially space(I Iiigs 7@'), any one di,,Lmetrically opposed pair of saicl lu(ys being adal)fed f,,)I- 125 t, engagemeiit with the edges 76 and 77 of an instilatin- I)Iate or strip 78 and anotlier diametrically opposed pair of said bein(v adapted for e.-i-affement with the wall of perforttioiis 79 n 80 iri said plate. Ob- 130

1,815,172 3 viously by manually pressing plate 74 inw,irdly to effect disengagement of lugs 75 frojii the plate or strip 78, the plate 74 may be turlied in either direction upon the spin(Ile 64 to adjust the tension of spring 70 as 1) desired,-the lugs 75 on plate 74 beiiig tlieii permitted to reengaae the cooperating poi-tioiis of strip 78 to maintain the tension ,idjustment so effected. 10 The upper end 81 of plate 78 is preferably of reduced width to fit within a. correspondiiio,ly shaped recess 82 in the upper end portion 16 of the base; and the lower end 83 of gaid plate is likewise of reduced width to fit 15 within a recess 84 in the lower end portion 17 of the base. Plate 78 is furtlier provided adjacent to the upper end thereof with a perforation 85 which registers with the tapped opening 34 in end portion 33 of plate 30, a 20 screw 86 being adapted to take into said tapped opening 34 to secure the upper end of plate 78 to portion 33. The. lower end portion 17 of the insulating base 15 is adapted to fit within 9, cup-shaped 25 or cylindrical support 87,-said support being sheared or slit, as indicated at 88 to provide for inward bending or offsetting of the portion 89 to clamp the end portion 83 of plate 78 within the recess 84, the lower edge -,o of poi-tion 89 being adapted to engage the liorizontal wa-i."t of said recess to assist in retaiiiing the insulatiiig base within thesupport.- Base 15 is provided at the rear side thereof ,r (see Fig. 5) with depressions or recesses 90 and 91, and support 87 is provided with slits 92 and 93 to facilitate inward offsetting -of the portions 94 and 95 into said recesses and into engagement with the horizontal walls of ,2@o the latter. This arraiigement provides a rigid connection between the insulating base and its support 87,-the latter preferably having an internally threaded bushing 96 secured thereto in a well known manner. ,2f, The base or flange 97 of support 87 is provided wiih a perforation 98 which is surrounded by an upwardly extending flange to guide the pull chain 68, said pull chain having split washers 99 and'100 or the like fixed "lo thereto at the points illustrated to thereby limit the degree of movement of the actuating ratchet plate 65 in each direction. As shown the end portion 17 of the base is provided with a cut away portion or !--ecess 101 C,-r@ to provide clearance for the pull chain. Flange 97 of support 87 is fiirther provided with diametrically opposed periorations 102 and 103 to provide for passage of the lead wires (not shown) to the respective terminals 41 and 48, the base 15 being recessed as shown at 104 and 105 to provide clearance for such wires. As will be understood the stops 99 and 100 are so arranged as to insure only a quarter eir turn of the contactor 55 upon each successive downward movement of the pull chain, whereby the circuit is alternately completed and interrupted. Also it *ill be noted that the end 71 of spring 70 is interposed between the plate 65 jo and the pull chain, thus ihsuring. against any possible derangement of the spring. @@s shown it is necessary for the screw 32 and eyelet 39 to penetrate the base 15 in plane,,tat right angles to each other; and in 75 order 0 provide for formation of base 15 by a straiaht line molding operatioii I prefer to form @he passage or perforation 53 for screw 32 by molding a slot 106 which extends radially inwardly from the periphery of the 50 end portion 16 of the bas,6 to the center thereof, said slot being located at the junction of end portion 16 with the intermediate portion 18 of the base. The other recesses and passages aforedescribed are likewise so 55 shaped a.nd arranged as to permit such straight line molding of the insulating base. The arrangement described is important since it eliminates the necessity for employment of a plurality of molded parts and the go usual.metal parts required for securing the same in proper relation to each other; whereas less complicated dies are req'uired for production of the molded piece. The lamp socket and switch mechanism are 95 preferably entirely enclose,d by a wound paper or fiber tube 107 which is adapted to slide over the base 15,-the lower edge of. said tube being adapted to rest . upon the upper edge of the cup-shaped support 87 (see 200 Figs. 1, 2 and 3). An insulatirig rib or wall 108 may be provided to increase the stren-th and rigidity of the intermediate portion-of the, base, and 'to counteract any tendency toward warpin- lo5 of the molded piece. in What I claim as new and desire to secure by