US886821A - Electric incandescent lamp. - Google Patents

Description

m. 886,821. PATENTED MAY 5,- 1908. H. KDZEL. ELECTRIC INGANDESGBNT LAMP.

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WITNESSES lNVENTOR ATTORNEYS No 886,821, PATENTED MAY 5, 1908.

H. KUZBL.

ELECTRIC INGANDBSOENT LAMP. APPLICATION FILED JULY 16; 1907.

2 SHEETS SHEET 2 WITNESSES ATTOKNEYS and. useful,Electriclncai descent Lamp I. lm s KuzEnor rADEN, NEARVIENNA; AUSTBiAHUN-GA -RY.

megawatt;- n that I,' HANS KUZEL, 'a' sjube eat; E dent-of B aden, 'nearYienna, Empire of Ans 'trla-Hungary, have inventeda certain new ,of

horseshoe connected to the leading-in Wires." 'lllleioliject of my inventionis to construct theffiiaments and soIsup ort them in their bulbs to preventgl ab thefilan entsannse and to prevent also such deformations of the loops of the filaments when;burning asto'eause short circuits.

- The. abi etl a a y m u and h0ld ing or sup orting the horseshoe filaments loosely .a-limited freedom in a bent,or twisted state in which their free movement is beforehand impededfiQ, 8 Certaifi g e y tion, 'forinstance in the horihontal or the vertheir position andliriction in the holding devices. For this purpose they are supported from a central. support or the wall of the bulb by hooks, eyelets, or mere small rods which are so arranged that an'imaginary line con necting the successive bearing oints of each through the longitudinal axls of the lamp filament leg is inclined to anes, passing 7 and by preference helically or simila y wound. f In the accom anying drawings'Figure 1 is a side view of a amp containing filaments in accordance with my invention; Fig. 2 is a perspective view of filaments with modified arrangement of holding means; Figs. 3 and 4 the hol are illustrations of modifications.

In Fi 1 the simplest case is assumed that 'ng devices a, b, c, for horseshoe filaments arecarried by a central support d and the filaments are arranged on an lmaginar cylindrical surface withtheir legs in approxlmately regular helical lines.

The two le' s of each filament run approximately p ra el the one to the other, and owing tot e elasticity inherent in them, they are in contact with their holding devices whereby their free movement is impeded.

, On burning the lamp in any desired oblique or upright position it will be seen that the curvatures and distortions due to the impeded free movement of the legs of the filannncraic'mcaunnscnnr i specification ofLett rsPatent Application fl1ed"J'u1y"16,"1 9 (l7. Seria1No.383,9l55.-

Qty to breakage of' shoe filaments arranged to describe a .cyhnder. about the axis of the-lam they may be arranged in the. barrel-like 017m shown in 'Fig. 2, Again, instead of guiding and sup porting the loops of the; horseshoe filaments cm a central support, they may be guided and supported from the-wall of the glass bulb, asby hooks or support carrying guide eyes arts 0f hehorseshoes near their sealed into the wall of the bulb. I, After burning a lamp of the construction ments are always suchthat contact between ad acent Cparts of thefilaments is practically meat-Gamay 5, 1908.1 l

'de-ey'es b,'c, sealed into the wall of the bu b, as shown in Fig. 3. Or .there maybe a combination offthe'two' ways of supporting thefilaments, as indicated for exam 'le in Fig. 4', where there isshown a centra c for the bends, w 'e the intermediate eyes are described,'for,a short time, in a giyen posi;-,-.

tical or in any desired inclined position the various parts of the filaments assume be-' tween any two supporting points, (as to which the soldering or cementing beads have to be considered) under the action of gravity upon the metal softened by the heat, the form of downwardly directed arcs. owing to cooling down on throwing the lamp out of circuit a contraction of the filament takes lace, such arcswill compensate for the same vent the eaking of the filaments. This way of supporting, therefore, on burning the lamp, causes the filaments to assume such ein'g flattened and thereby will pie-'- If now posltions that simultaneously both of the inconveniences above referred to (breaking of.

the filaments and short circuiting of the same), are practically avoided, so that the lamps when burned in any desired position showa normal len th of life.- This is a result of the inclining o the legs of the horseshoe filaments to planes passing through the longitudinal axis of the lamp, so that the yokeshaped filaments can never hang perfectly, but so that they bear at all times on one oint of each holding device whatever may be the position of the lamp. In this way a moderate frictional resistance will result from the weight of the filaments, which prevents the legs. of the filaments from moving freely on throwing the lamp intocircuit, but owing to the dilatation due toheating the filaments to incandescence, arcs or beads in the filaments are produced' Gravity tends to make the legs of the filaments parallel, and thus counteracts any ten d ency to come, into contact with each other in the arrangement set forth. Further, it

causes the formation of. arc-shaped parts in.

the filaments which act to compensate and Compared devices within the bulb 0 the lam 'de each of said legs ongitudiprevent the filaments" from breaking on throwing the lamp out of circuit again.

The spiral arrangement of the filament also filament leg being inclined; to planes passing "through he longitudinal axis of the lamp and the centers of such holding'devices substantially as and for the purpose described.

2. In an electric incandescent lamp, the combination of a horseshoe shaped metal filament having theiree ends of its legs fastened to leading-in-wires and a plurality of holding to loosely nally at a p urality of points, the line connectas and for the purpose longitudinally with lamps having stretched fila-' adapted,

mg the centers of successive holding devices of each legbeing a helical line, substantially 1 described. 3. In an electric incandescent lamp, the

ment having the free ends of its legs fastened to leading-in wires; a central support within the bulb of the lamp and a and adapted to loosely guide each of said eggs at a plurality of points, the lines connecting successive holding devices of each filament leg being inclined to the planes assing through the longitudinal axis of the amp and the centers of such holding devices substantially as and for the purpose described. v

4. In an electric incandescent lamp, the combination. of a horseshoe shaped metal filament having the free ends of its legs fastened to leading=in wires, a central support within the bulb of the lamp anda 1plurality of bold:

ing devices attached to sue centralsup ort and adapted to loosely guide each of saidq longitudinally at a plurality of points, the line connecting the centers of successive holding devices ofeach leg being a helical line, substantiallyas and for the purp'osedescribed. I t v p In testimony w ereof. I have signed my name to, this specification, in the presence of two subscribing witnesses. v HANS KUZEL. Witnesses: v

'JOHN GEORGE HARDY; Ron'rl W. HEINGABTNER.

egs

.40 combination of a horeshoe shaped metal fila I lurahty of holding devices attached to sue central support

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