US817222A - Electric switch. - Google Patents

Description

No. 817,222. PATENTED APR. 10, 1906.

H. E. CASE. ELECTRIC SWITCH.

APPLICATION FILED MAIL-24.1904.

INVENTOR: M 5. (c w.

i MTTOHNEY.

or it it l lll lillllfittlllllll llllll tllllllilll l Lilli,

, no. dimes,

fipecification of Letters Itntont.

Irntontod April 10, 1906,

A lication filed March 2d. 190 Burial lluv 199,738.

To (l /i i! whom, it 'rrmy concern:

lilo it known that I, l-lli'norn l (Lists, c citizen of tho United States, and a rcsidcnt o1 llzlridgcport, in the county cl .l niriicld and Stntc of Connecticut, have invcntcd cortnin now and uscful linprm'cincnts in lfilcctric Elwitchcs, of which tho following is c spoci'li cation.

ltliy invcntion rolctos to improvcnicnts in clcctric switches, lUlLl particularly to that class known as "knifc sn'itchcsF The ohjcct oi. my invcntion is to inorcnso the conductivity by all copper contact with-- out incrcnsing tho cost oi construction.

Copper lacing tho host conducting nmtcricl, it is always uscd to form tho direct contact of thc knii'c and hhidcs of ai switch; but owing to thc cost of copper other hnscr .nnttorinls, lilrc brass, are usod for other ports of the blades. 'llhcrefore it is customary to inscrt brass bushings in tho lower part of tho hhuics to hold the contact-wires. 'lhis construc tion is olojcctcd to hy tho underwriters s not transmitting sniiicicnt amount oi current. To nmlrc this crashing; of co )pcr would entail on ndditioncl ozrponsc both for tho coppcr rind drilling the hole therein for the contact- Wirc. Another irnportnnt ioaturc rcquircd by underwriters is that tho rnctal must he thick enough to form a, sullicicnt number of threads for the binding and rctnining scrcws to hold.

My invention consists in forming ttchair for the support of the copper hlodcs cithcr lay making this chair of one oi the blades, While the other blndc has n tubular and to rccsivc tho contact-wire, which tubular end is located in the chair, or by making" or separate choir of brass, iron, or any othcr chczip mm tcrial of sufficient thickness to contain tho necessary threads for the binding and rotciw ing screws and to scours an clhcoppor contoot by moons of thin copper blndcs inserted and fastened in said chain For it full and clcnr undorstnnding of my invention rctorcncc is had to tho accompany in drawings, in which-- *igure 1 is a) side elevation of c. lowdoswitch, showin v myimprovod contacts and hrokcn vicw o" contactwvircs therein, fig.

2 is an enlarged. scctionol View of tho insulctcd boss and front elevation of one oi the. contacts with s sectional View oi o contact- Wirc thcroiin Fig. 3 is an cnlnrgod detail 5 front elevation 01 the contcct shown at Figs.

1 and 2. Fig. 4% is on enlarged. modified con.-

struction shmving o dctnclnihlc chair with co iipcr hlndos scoured thcroin Fig, 5 on on nrgcd dctnil view of the choir shown at l ig, -1. Fig. ii is an cnlnrgcd dctnil modiliod constrncthm oi? tho detachable chair.

c modified construction of tho hicdcs shortcnod and attached to n choir, n suction oi c, tuhc looctcd in tho choir rind in contact with tho blades.

its construction and operation crc lows:

lh-lcrrinc; to liiy s. l, 2, mod 3, l and 2 airs tholcnvcs or hhnlizs arranged in. pornllcl rc-- lotion to ndn'iit tho lrniio .l. i The binds l is nnido long enough to form the choir portion 1, herring is. straight linsc or sent and par ticllystr ight sidcs odnptod to ho scotcd in tho si narc groovo or chunnchwny ll. of the lnisc 5. 'l lis squnro choir iorrnntion and sqiuirc groove or chztnnrlwcy will cll'cctunlly prcvcnt tho contact swiveling on tho hiisc Tho lowcr mid of thc hladcl is cnrriod nronnd to form, the othcr sido of ti "hair and is hrought itgcinst tho hlndc it, (intending lair cnough up to give it good hrm support to both hlndcs and sccnrcd thcrcto and tothc blade 1 by moons of tho rivct G. Tho blrtdc Zcxtcnds within this chair formation oi" tho lilndc l and is'providcd with tho tubular POI tion 2 to admit cithcr of tho ontztctwviros 7 or 8. A thrcodcd holc cxtcnds through tho hnsc oi this chair formation of tho blade 1 and through the tubular portion 2 of the blade J in! tho rctcining-sorcw 9, Fig. 2, and through the sidcs for the hinding-scrcw 1.0.

From the chovc description it will rccdily' he soon that c strong construction and. on, allcoppcr contact is secured of compnmtivcly thin inctcl The copper hladcs nccd ho of no thicker nin-tcricl than is 'rcquircd to convoy tho current and stand thc fatigue incidcntnl to the cngsgcmcnt of tho lrnilc thsrcwith, whilo thc combined thiokncss'ol tho two coppcr lolcdcs will furnish sinplc threading ca pccity for both tho binding .iuid rctaining screws.

Tho some results are obtained, as chovo dc scribed, in the construct-ion shown at Fig. 4,

. combined niche a tubular ri-zccptcclc for the GOHlJEt-Gtflt'llo. l3 (soc also Fig 5)'is n choir adapted to he soctc'd in the square groove l of tho insulctcd boss 5, n which the two for iht screws.

blades 11 and 13 are firmly socnrs-d h mums 'lht: a-hnir 2. (win ho mMlC 01 of suilirit-nt thickness in h w the nmvssnnv snpnnit to the blades and holding impurity in? the svx'ews. in (his cmisti'nvtinn it is-nnt not'vssm'yfor the retaining-screw f) to prnjvvt thrungh the hot {win 1' the (llzlll int'n thv tnhnlnl' feirsinttinn of div hhnws, its the (hair will he thivk enough tofurnishsnllivient mnnhcinf threads While they end of the hindig-st-mw It) wiil prnjott tin'ungh :i hole in no of the Htlllltlit'lllttl tHHHHlUIIS 0f the hides, it is nnt nvt-vsszny that this hole he threaded, us thtonly PHI'PUSP Of this st-i'ew is to bind 'thv t-nnt'zn't-xvirv. The (hair 13 is nnide of thick shwt nn-tnl hunt into the prnpoi' form tn ILCtii' thtends of the bill-Q03 While thv innditi'ed (UHSlIlHllUil 13 of this than (shown at Fig. (5) is within (first or nia t-hined out, of snlid stock. In this wnstt'uF- tion the sent 13 is adapted tn miter the Si'llttilt gronve U1 (llillllll*l-\'\'il -l ol-thv insulated base 5. in tin, nmdilimiiinn shown at Fig 7 Th0 blades 1:") and 16 an shortened and as? against thv top of the mppm' tnhwsvuion 17, insvi'ivd in tliv (-hnii' 1.55. This mansti'mtiun/lilcv tho ()ilHTS insures an all-stag per whim-t.

i rnni tin ftn'vgning dwm'iptinn it will T'Otitiily ho seen that thv dominating: funtnrv {)f any i'm'entinn is tn surnrv an nil vnppni t'nntuct with littlv (W130 ndditiunni oxywmv Ufllllllill fut-turn. To m'tnntplixh this, tin i'hnir for nnttinn an indispt-nsahlv imtnt'i whether the chair is a part of one ni' tht: hlzulvs 01 l5 :1 svpinntv plum into whit'h lllt hlndm s 0- Cuitii. 'lhis t'hnir mature in nnv man, in for: nit-ntinnvd, is fni'nwd by dnnhiing; my (3110 01' thv Thin 00mm blades tn givitlw Itttfi siny viniir-snppmt and in the Ulilti' matthe thin ('uppt'r hlndm are insvstvd in :1 Chan: of lmsm' and chvnpvi JIHtiF-Xltll, so that in hither cast an till-cup 01 t'mitzit't is sfcuzwd.

The 'dvtuvlninlv (hair win he used without any (jiltlllgfi to him n connect inn not Ween Lin:

knife 3 and t :2 Wooden handle 13, shown ni' Fig 21, t'ifatri /w 1.) extvnding" through the handle l8 and into it thrmded hole in the bottom of the chair.

Having thus dcsc'rihed. my invention, What i ciaim as new, and desire to seeure'hy Lettt-i's l aiie nt, is-

i. A RHifQSWiU'h having an insulatinghas e provided with an Mining groove 01 channel-imp, a contzwi'. comprising blades of format lengths, iiie ()W1Z end of one blade enveloping the iuwezend of the :ther blade with 21v ('lmiFlil-K Formation adnptmi to be seated in said llit'iIlILGl-WLY and be secured illtl'tin, means; on the laws? end at the other Mild? to vmhmte the commit-wire, means for securingsnid hlzides together at- :1 pain i: abuva said contact-Wire, fur the purpose set fairth.

.2. in n knife-switch the combination with an insulntingdmse havin n t lnmncbwagi, of 1 contmt cnznprising ilndes of unequal lengths, and haviing this Hyper ends in pamh lc-l relation to receive the mini! and form the vat-51mm, a #:hair 'n'nten (a-f tht luwer 1 nd of 'ilK' longesthhido adapted to he socanwd in said climini im'ny, int-ans for securing the mid nf said long iii: d9 the Vilil-Cttl body p01"- tin 0i hath liludvs and {ilBtfl/P mini (h-6111', the ltz-wvr f! of t shortest 011119 zuiapftwii to mnhmt-t' 3 001231!(tr-Wit? and within s; id 'i'intit'. l nt thv PUZPOHP set forth.

is} Jain l t it the shorter blade having 21 sea for 21 liltt'i-I'i'ilt, ti t-imir fanned of the longar blittlt ndziptvd i0 tltiifitlii said 5021i; means n? :em'ut'ing ihv extreme lower end of the iiHLfiSl hiade in the wi't'ical hotly portinn 0? but i hlndvs, lni ino pul'posv set fnrtli.

iiignvd at iiiingvpnrt, in tin}. vounty of i ni id and State (ii ionnectit'nt, this th day ni' Blarvh, )1. i) 1904 HAROLU ii. i'nnim't fan" i: linii'v-switeh ('tnnprising h s of unequal imigths, iii-9 QOXHT-

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