US1765793A - Lamp socket and terminal therefor - Google Patents

Description

June 24, 1930. F. c. HERSEE ET Aln l LAMP SOCKET AND TERMINAL THEREFOR Filed June 15, 1927 'll/1111111111 Ill 'I ma 7 08.2 HWQH w ,T n L/Z Patented Juliev .244',`

FREDERICKQHERSEE, on WATERTOWN, ANDv NATHANIEL T. WILESg-o'r` SoiyrERvIfIin',

MASSACHUSETTS, IigissrerNonS; BYVDIRE'C'T AND1: MnsNn '.AssreNlivrnNTS, To fric. l ,'.nERSEEjcoMPANYyoFi-wnrnnrown MASSAcnUsnrTS, 'a ycoieroimrifoN onNIAS;y

^,-f1sAci 1UsEzr'rs l l u f LAMP-SOCKET AND ,TERMINAL THEnEFoR Apiiliafion mea Junev 15,

i i, This 'A Vinvention ,relates to?,` electric lamp Sockets and terminals therefor, and aims to ,provide improved meansy fork connecting the lamp .bulb with asourceofelectrical energy. The invention,y is more particularly, but l noty exclusively," designed fonusfefin respect to head lights and taillights` ,of automobiles,

, wherein automatically 'adj ustive contact ,terre minals are employed-to establish circuitfconvmention; withitheiampsg.

c kThe invention willbest be understood from i ay description ofton'eselected embodiment thereof illustrated in t the n' accompanying drawings, and wherein lFig; 1, is a rvertical"lorigiftudinal Section showing the invention` operatively assembledv in association with'k av lamp' bulb; L

Fig. 2, a similar .sectional view of'ithe terminal parts dissassembled and conveniently grouped in the normal order' ofA their assem-y bly; .l y .t

.E ig.,3, lasidey view of the terminal lwith feed cable operatively attached thereto; and c lliig, `a cross Sectional viewof the invention'lon the line' f-#laoflig4 1, looking.' in the direction indicatedby the arrow.

I Incarryingout the r-invention ,in the form construction having an openfrontend tore-1 ceive the lamp bulb and a closedrearend provided 'with a central` openingA 14 therein to receive `a fconductor 15 for` connecting 'the lamp bulb withasuitable source'of electrical energy.. The lamp bulbmaybe Securedr in pol.

, sition by means of lugs 16 laterally provided vontlie base 11 andada'pted tofregister with angular s'lots`17, yprov'idedfon themargin of thevr holder. t Said Vholderis, preferablyk formed in `@detachably Vconnected Sections. Inv the present instance, the rearfportion Vof vthe-holderV constitutes a Vseparate detachable 'member 1927.v Serial'No.v 199,019.

1,8 is fitted'/ into the `l main *portion r13 andforms-an .extension thereof, suitable lockingmeans being provided for securing the parts together, as, for example, by vbosses 19 formedat'oppositepoints on the wallofthe rear .portion andregi'steringvwith corresponding on the Vfrontportion of the holder.

V'Seated 'in thevfront end; ofthe rear holder` .portion `1,8.,"jweprovilde anv annular insulation terminal carrier 21which extends forward 1' into the :main portion 13 andis suitably yenlarged' within ftheK latter to engage theY walls thereof.L 'The V.conductn 15 yis extended-fon ward within theholder'intoV the borez22-fof the carrier and supports on its front end :a

marginal slots 20, similar totheslots 17 metal terminal23 extending throughand'be-v y yond ,the carrier forengagement with,r the contact 12 of thelarnp bulb. ,"Ihe terminal 23 is recessed centrally vin its rear to`receive the" wires "245Aof the eagle 15, which are V'soldered or i otherwise permanently fse-v cured thereto, and" has a reduced. frontrlfextension portion A' 25 formed for f normal f engagei'nent `with they contact element v12. This rmethod ofattachmentA of the .terminal to the cablepermits thelaxial centres of these partelvtobebroughtinto alignment, and, asthe mvax.-Y 'A .imum diameter of the terminalissubstaiitiallythe` same asthe diameter ofthe .cable they may bereadily drawn in assembled rela-2 tion through the reduced opening 14 inthe rear enrd'cf theholder and also throughfsuchf' other openings (not shown) as are common; f

y-ly ,provided in other -parts for f the; support.

of'tliefcablelor `cable harness. lworeover,r the i asoccurs v'when the cable wires are:laterallyV `occasional-pull-exerted lon the terminal Vby* attached Jto the terminal, as is commonly prac-V f .Combined areprovidedf'for; v Y c ingtheterrninal forward andf-foriopposing and limiting -rearward;displacement, there-k' of. c These-means include avdetachable sleeve member y26-mounted on the extensionportion 257a1'd; terminating atV its.` front. end in aretrfdfhed forming intefiel @hd-ex# terior 'Shoulders 28, 29, said end, lncluding` l 40. Y, gagement Withthe contactelement l2 on the clined on their rear falce ivhereby'the'engagl ing'spring 32 has a'tendency'to force the 0pj thehead 277 being bifuricated by a transverse slot 30, thereby presenting opposing semi-l .'-circularparts susceptible of limited move-Kl ment relatively to eachother. In mounting Y Vthe sleeve memberon thev terminal, the" ex.

tension! portion 25 is first introducedfintothe rear end of the sleeve member and thrust V forvvardthrough and beyond the bifurcated their-original `position when the' interior nieuwe, illes 111iial1yspreding the' 'head 27 whh again resumes itsnormel Outline es tingtheparts ofthe head lto spring back into i' shoulders 28 drop into-Vian annular recess 3l Yprovided on the terminalnearjitsfront end.

'. lhisflocking engagement vofthe sleeve niemberyvitli .the f:terminal norinallyreffectually prevents'. length-Wise displacement of the 'former' inr either direction rand PQSSCSSGSi 0b;

vious advantages 'over' Ythe fusua-l practice. of soldering V'or otherwise permanently y uniting i Y the parts and-'pr'eventingY 'their' disassembly L pansionspringj32 bearing at one'Y end against .i .jth'efexterior shoulders29of the :sleeve inem? Mounted Yupon andcloselyengaging theA frontend efthelslee've member 26 is an ex b'er andat vthe opposite end against the aperf tu-red "bottom "o'fa' socket 'member 'or bushing flange 34adapted` tobearfagainstthe face Vof "the carrier.' 5;: Said spring and socket member are cooperatively adapted to `limit retraction movements Of the terminalinduced by force aiipdto. Ythe Cable' .1.51 beyond. theholder 13', saidfspringftending to 'actuate the terminal forward :toits i'ervvard limit rot 'inoveillent and'toinaintain the terminal normally Vin enlamp 'bulbl vIn originally mounting V the spring 32v and socket memberS-S onthe sleeve member, the rearfendofthe latter is prefery ably introducedjthrfough the rontends of the? former,` whereuponVv the irearend Vof the :(Figjl), to prevent rearward displacement ot'a these part/s.` shoulders 2r9pof the sleevehead 27 are preferably. slightly in?.

posingl parts. of the head tovvardeach other, thus preventing .the interior shoulders 28 from leaving the terminalfrecess 31 and con: -sequentdisplacement .of the sleeve. To re:v move' the sleeve,v therefore,` `from its mount? v Y 'ing Vit is first necessary to. slide. the spring back asutlicient'rdistance at least to clear the J bifurcated portion. of .tlie Ysleeve and,V thus all i lovvtjhe head27-freedomlforspreading, l y yIt" *Willv be understood .that 'our inventionjis `susceptible of various modifications infembodiinentv Land application Without ,departingV from thejgeneric'. purpose and obj ects@thereofl illustrated in the foregoing specication',` and all coming Within the scope ofthe appended g Y i claims. We claim as our invention:

havinga bore therethrough, a conductor ex-` tending into said bore, a terminal'meinber secured at one end to said conductor `Within said support and having a redueclportionat the opposite end `extending V.through and bel In@ terminal, in combination; (1,1 Support I yond Said Support, a. sleevemountedton zand n detachably securedto said terminalf'reduced pertieniandi having-ahead arranged beyond said support, a spring mounted on the sleeve and engaging-saidhead, and a support-enga-ginebushiilgendesiee seid Spring. and `iii-0- vdile' ail'butment tombe .rear endlot the" .Spring combination, a tubular housing for 'supporte. in device ,of uigfciass 'describen-a# -85 ingatone end a lamp bulb havinga'contact element thereoma conductor extending into the Opposite end ofthe housing, aterminaban the conducto'rvvithlin Vthe' housing for engagement Hofmaifiwfh Said. LQOlitaCt elementi a carrierxed in the housingforenclo'sing and siiigipor'ting4 said'kterminal,'asleeve'movably niiintedbn the terminal Withinthe carrien lockingV means Vfor d'etachalolyv securing the sleeve on the terniinal,'janexpansion-'spring carried onv the sleeve forgactuating thefterini-A naltovvardthe Contact' element, anda bushing fitted inftlie carrier anfdjsu'rrouncling said sleeve' and spring and' providing an abutment forth@ Springn' a "terminal, in combination, a stern member having a recess at or n earone end,` a Slr'barriecl. O11 the, Stem member. andiha'vine' e'hafd eine@ Gedisa@ Sleeverbei'ng bifurcated a portion." of its lengthincluding said head', said'nhead 'he ving van internal portion extending into saidf-recess andan external spring surrounding said sleeve and Vbearing in operative' positionratjone endfagainstsai'd 'Portion "forming" an, abutment- .and a .C'ol `1 t( In 'combination' vvith y *al lamp vs "o'nclret y i the support of'I a lamp'bulbifaf'carrier Vlixed'V in said socket and; .having a bore there# througlirto receive azconcluctona terminalrfor attachment lat Vone end fto i the j*COIidM- CDOrl and.

adaptfed'jto'be"extlded with a portion ofthev i Conductor freely Yinfo andi withdrawn from.

the bore offjsaidj carrier,r said terminal' having a reducedportion forming afsteinniember for engagement normally With' thev'lampV bulb and,r providedfyvithagroove-at or near its'outer y Aend,terminal` actuating means surrounding s'aidjstem meinberand' including a sleevede,-

tachably mounted" thereon `vvitl'iin the carrier andjadapted to'be slidonto andOfthe telmi- 'nel et; its. from endisaid Sleeve havingihterf nal*- and externalK shoulders xat its 'front i endi and being. biiiircatedaV portion Yotitis length,'V

said! internalshoulder of' the 'sleevefbeingf Yifea adapted to snap into said groove on the terminal, a bushing movably fitted into the bqre of the carrier vsurrounding aportion ofthe terminal, said bushing having .an externalv flangek 5 at its outer end for engaging the face of the carrier and an internalflange atits Vopposite end, and a coil 'spring Within thebushing and surrounding the terminal, said spring-being seated at its inner end on the internal flange y N,y of the bushing and adapted to bear at its front end on the external shoulder of said sleeve.

5. In a. device of the'- class described, in 1 combination Withy a holder and'a lamp bulb v having a Contact element thereon and mountf ed in said holder, a carrier mounted in the holder and havingl a bore therethrough, a conductor extending intosaid bore and having a terminal extending through and beyond said bore and into position for engagement With said lamp bulb', said terminal being rev traetible by and With therconductor out of Y Contact With' the lamp bulb, and means mounted on the ternimal and cooperating with the terminal and said carrier for normally maintaining contact betweentheterminal andsaid Contact element on the lamp bulb, said means including a sleeve slidablyfitted on the terminal and having an abutment thereon, means Y. on the sleeve( coacting Withy means on the terminal detaehably `lc'ickingthe sleeve on the terminal, a bushingftted in-thefbore of the carrier and freely Surrounding said sleeve and having an abutment arranged opposite the abutment on the sleeve, and an expansion spring surrounding said sleeve Within said bushing and engaging said abutments;r

- vIn combination With a carrier having a bore therethrough, an insulated conductor having a baredv end extending freely into one C end of said bore, a stem member bored at one end to receive the bared end of the conductor Y and extending at its opposite end through and v beyond the carrier, a sleeve 'loosely carried on the stem member and having abutments at opposite ends, *means-for,V detachably locking the sleeve on the stem member,"a bushing carried on the stem member and fitted into the bore of the carrier and freelysurrounding a portion of said sleeve, said bushing` having A an annular externalabutment at its outer end for engagement with theearrier and an annul lar internal abutment at its inner end intermediate the abutments onthe sleeve, and a coil spring surroundin'gwafprortion of the sleeve Within the bushing for engaging the forward abutment of the sleeve andthe internal abutment of the bushing. f In testimony whereof, Wehave signed our names to this specification. FREDERICK C. HERSEE. NATHANIEL T. WILEY.

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