US933539A - Incandescent electric lamp. - Google Patents

Description

o. PARKAS & H. J. JAEGER.

INCANDESCBNT ELECTRIC LAMP.

APPLICATION FILED .4116.24. 1908.

Patented Sept. 7, 1909.

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,STATES 'CARL 'MRKASLAND HERMANJQJAEGE'R. 'or newA Yomr, N. Y.

J. vJliltorxn?A a citizen o'f the United States of Amerxea', both residents of 7New l ork, m the county and State of New York,

have invented certain 'new and useful 1m. provenientes m Incandescent Electric' Lamps, cf whlchthe following is'a specification.

'l si Thisinvention has reference to irnl'n'ove-A ments 1n incandescent lamps.

It ertains' particularly to that type-ofineen es'cent' lamps `containing e so called metallic filament of reltively great length 'i n, relatively lai embodied in e. glass .lobe'of usualy si'ze und having a number'of oops all in series with each other. 'Thus ,the single [loops of the filament formo'ne continuous single conductor requiring butvtwo 'leading-1n wires asin anyV ordinary multiple'arclam Theselon'g 1 netallic filaments, as iswell) k consume but very little current sind present e' light emittili surface.

Such lon metal ic filiiments'me'e, for instance, o chromium .expend by the heat of the dectriccurrent VWhen-,the lulnpis lighted.

`aeh loop of the filament accordinglyg'ets d base et the top-.undthen there is danger off twoneighbormg Eloops* coinin 'in contact. with each other whereby the li :iui'entburns losin ,softensA Therefore lamps containiu met lic filaments cannot besafely, burne exfce t whenhanging 'eticallydownward with t e out, or one loop may touch the luss'wiill of the globe; breuk-ingenua."and esho'yin with the )ase at the bottom 'tlledn'ger-of the' lamp is .so {n xuchi" greater.' l For" certain purposeszit i'sdesirable or nccess'nry to mount the lamps s o that the filament i's in a. horizontalposition. The abovedescribed lum Vs canot'be burned horizontally.

-' T e presentinvention. has for' its .object to pro ucc incandescent. lamps with su'ch long, economical, metallic 'lilamentsfmvhich muy be burned horizontally or .vertically with the base at-the bottom.. 4For this purpose flat, elastic fand conductivev supportsfl and flat elastic anchors are provided within the novel lamp. These supports are 'a'rren in such manner that thejfree ends of t e single loops of the filament maybe;

cemented thereto so that all the 'loops are in series and form one continuous conductor while the elastic anchors support euch a loop Spectchtion of Letters Psi-tent. Application mea August 24, 190s. serial No. 449,974).

4Beitknown lthat Wc, CAuL FA'RKAS., a citi-'- .zen o f the Kingdom of'Hungery, and HER- MAN nown,

Patenten sept. 7, moo.

proper. 4The llat metallic conductors and the flat elastic anchors are of novel'eonstruc'- tion.

protected against inu'ry und breakage when lnear expansion o the loops takes place when thela'm'p 'is lighted. Lxexrse *fue sin' gle loops are p'otected n einst. tearing when.:

contraction t es place a ter-the current' has been turned oli.

"The invention is illustra.ted in the accom# panying drawing in which:

Figure 1 re resents in perspective view slit' incandescent amp with metallic filament which embodies-in'desirable form the pres ent'improvements; Fig.' 2 illustrates in top lan View the top' support for the filament oop'syand Fig. '3 is 'across section on lineav s, a of Fig.

Similar letters 'of 'reference denote like prts in all the figures. The protecting and supporting devices are By` virtue of the elasticit of these- 'devices the single loops of the li amen't are TENT orienten.

made of very thm, flat strips' of metal which.

may be secured to a glass rod by fusion in the same manner in which the leading-iii fwires are sealed into 'the stem. Accordingly these devices `are preferably .made of 'platmum' 'or letinum niclf'el Anlloy or other l suitable, con uct'ive metal which isdnctile enough 'to' be formed 'into very thin' sheets und Stripsnnd possesses the 'required el'as# t'city.

thelobe orvacuum chamber which usually .iso elong'raterl'orl 'pear slmpe,'b is the stem undcu-rryingthe lending-in Awires c,` d. A To 'the solid top portion of the stem islfused n. thin Standardor post of lass, preferably 'a 'thin lass rod-.1 A snm-llgrim f is formed Qi'n tl'x ower portion of the standard. To thisrim are secured by fusion three flut 'metallic conductors at e distance of 90 from' each other while'the wiresc, (l are bent horizontelly over in the free spaceoi the ;c1.rcle and in a horizontal lane' with the three conductors. Close, to t c top of the lass rod and formed into e short 'horizontal strip l 'I-lrFi. l'of'the drawing @represents 'l fused four ,dat elast-ic enc-hors.

sealed `into the globe in the usual manner tot llt:

plane at 90 apart. The anchors are not`.`

. arranged in the same vertical plane with the support j.

supports below, but in vertical planes between them for the reason which will be stated below. Each elastic anchor consists ofa dat horizontal strip formed into a hook g as shown in Fig. 1. The anchors are made of flat elastic metal strips referably of platinum,'platinum alloys, nic el, aluminum,

or bronze, the strips from which they are made must be very thin, so. as to be elastic.

' Four filament loops are shown in Fig. 1 of the drawing in connection with the three elastic conductive supports and the four elastic anchors. The loops have lthe shape of a hair pin. They are narrow at. the top and the free ends are relatively far apart. The free ends are cemented to the metallic sup Orts andthe loo s hang in the hooks oft e anchors. For t is reason-the anchors arenot? in the sa'me vertical planes with the .suppoi.`z ,Aeg-floops are' arranged as follows: 'HQI y'fr iscemented with one free end tothellea ing-in wired, itpasses over the hook of the anchor m and its second free end is cemented to the neighboring'side end of the support h.. The loop s is cemented with one free end to the second side end of the. support h, it passes over the hook of the rinchor n and it's second free end is cemented 4to one side end 'of the-support i. The loop t is cemented with one free end to the second side end of the support i., it passes over the hook of the anchor o, and its second end is cemented to the neighboring 'side end of the The loop u is cemented withone way.

y, 1t runs down to the leading-'in wire c to 4.

which its second free endis cemented.

The filament loops cemented to th fiat elastic supports and hangingin the hooks o-thenflat elastic anchors do not sag when linear eipansion takes place during the burning -of the lain@ `'I "he hooks of the clasticanchors leave some rooxns'for expansion. When the current is turned`oiitl1e loops become cold and contraction sets i`x'1\ but the dan er ofbreaking is avoided becanse the cod, stift' loops are protected by the elastic supports which then slightly give lVe claim as our invention: I A An incandescent electric lamp with metallic filament, comprising a vacuiim chamber with stem and leading-in wires, a standard or post of nonsconductiv'e material secured to the top portion of the stem, a set of flat, T sha ed, elastic, conductive su (a.-

ports for the lament loops secured to tie bottom portion of the standard, a-set of flat elastic anchors with hooks at the ends secured near the top end of the standard, and a metallic filament consisting of four loops hanging in the hooks of the elastic anchors and cemented alternately with their free ends to the leading-in wires and the free side ends of the T sha ed supports so that the loops are connecte in series. 7 In testimony whereof we have hereunto set our hands in the presence of two subscribing witnesses. I

CARL FARKAS. ,l HERMAN JLVJAICGER.

Witnesses:

JACOB L. DIAMOND, G. ScnMALs'rEIK.

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