US1032961A - Incandescent lamp. - Google Patents

Description

E. H. TATE. INGANDB SOENT LAMP. APPLICATION FILED MAY 4, 1911.

Patented July 16', 1912.

un memes UNITED STATES PATENT OFFICE.

EARL H. TATE, OF LOS ANGELES, CALIFORNIA.

Specification of Letters Patent. Patented J 1y 16, 1912, Application filed May 4, 1911. Serial 10.62%927.

To all whom it may concern:

Be it known that I EARL H. Tarn; a cltizen of the United 'States. residing at Los' Angeles, in-the county of Los Angeles and State of California, have invented certain new and useful Improvements in Incandescent Lamps: and I do declare the following to be a full. clear. and exact description of the inventiomgsuch as will enable others skilled in 'the art to which it appertains-to make and use the same. I

This invention relates to incandescent electric lamps,'and the object of the same is to produce improvements in the means for connecting the base with the bulb, the stem and the terminals with the neck of said bulb, and the filament hangers with the stem; and furthermore to improve the construction of said hangers themselves. These objects are accomplished by the construction hereinafter more fully described and claimed and as shown in the drawings wherein- Figure l is a perspective view of the lamp partly in section; Fig. 2 is a central vertical section through the same:' Fig. 3 is a detail horizontal section on the line 3-3 of Fig. 2: Fig. 4 is a similar view taken on the line 44 of Fig. 2; Fig. 5 is a plan view of one of the hangers on an enlarged scale.

In the drawings the numeral 1 designates the base having exterior screw threads as usual to engage the lamp socket, and having around its lower end a flange 2 containing an upstruck groove 3 within which lies aninsulat-i'ng cushion or ring 4 which bears upon the bulb 5 when the latter is in place. The bulb is intended to be made of glass as usuah. and its neck is molded within the metallic part of the base 1, while its body rests within and is gently supported by the ring 4 so that vibrations to. which the lamp is subjected are less likely to disconnect the glass and metallic parts or to break the vacuum in the former.

The numeral 10 designates a stem, preferably tapering downward from its head 11 as best seen in Fig. '3." These parts are by preference formed of a single piece of glass, and the head has corrugations on its exterior and is intended to be molded within the neck of the bulb, the'tcrminal wires 12 being laid across said corrugations and molded into place so that they are reliably held out of contact with each other. The outer end of one. wire is connected with the metallic part of the base 1 and the outer end INCANDESOENT LAMP.

of the other wire with the contact 13 as usual. Mounted 'upon and by preference molded with said stem are two collars each consisting of two disks spaced slightly apart for a purpose to appear. T he upper collar carries the crescent-shaped hangers, and the lower collar carries the anchors which are awire frame 20 curvedin nearly a half circle and having an arm 21 projecting from the center of its length, and two pins 22 projecting inward from its extremities toward each other, and a bow 23 also of wire and curved on a larger arc than that of the frame. this how having eyes 2-1-1 at its extremities which are mounted loosely on said pins 22. The arm 21 forms a stein which is inserted between the two disks of the upper collar and molded therein,'and as seen there are several such hangers disposed' around this collar. Molded between the lowermost disks are books 27 also of wire and" [je'ctingoutward, and as seen there are several of these standing in ahorizontal plane through the lower end of the stem 10. Fi-

nally the filament 30 is led from a pin 22 of one hanger downward around a book 27 and then up to the nearest pin 22 of the next hanger, from which point the current must pass through the frame 20 to the o po; site pin' 22f of this hanger, when the next"ti'la-' Inentt occurs. The terminal wires 12 are connected up as best seen in Fig. 1. I have found that, this means of supporting the fila'm'feu t tender'sgthe latter less liable to ,breakage during the ordinary and extraordinary uses. of an electric lamp, than Where theextremlties of the filament are molded into the glass, so that vibrations and expansion. and contraction are necessarily required to take place within the length of the filament itself. By making the upper collar larger than the lower. the general contour-of the series of filaments will be slightly conical with the smaller truncated end of the con at the bottom. The books 27 may be. madeas long as possible within the bulb 5, and in fact, they could be quite long so that the lower collar would be larger than the upper and thereby the smaller end of the conical group of filaments would be at the tops The use of a how 23 between the pins 22 of each hanger, loosely connected at its end with said pins, I find to be of considerable advantage where each filament attached to one pin leads to an adjacent pin of another hanger, because this disposition of the filaments tends to draw the frame 20 outward and such tendency is'to an extent resisted by the how 23. The use of a curved frame 20 instead of a hanger-frame whose arms are straight, I find to be beneficial be causeit reduces vibration of the filament by ofthe lamp support, as it is obvious that a straight member cannot yield longitudinally whereas a curved member can.

I \Vhat is claimed as new is:

'1. In: an incandescent electric lamp, the

combination with a glass stem having an en larged head provided with external annular corrugations, the terminals leading across combination with a the latter, and the bulb whose neck is molded around said headfof the tubular metallic base surrounding said neck, and the filaments carried by said stem and connected Wltl the lnner ends of said termlnalsl.

2. In an incandescent electric lamp, the

lure upon it of different sizes; of hangers molded in and projecting beyond the edge .of the upper collar, hooks moldedin and filaments.

glass stem having col-' projecting beyond the edge of the lower collar, a conical group of filaments c0nnectlng said hangers and hooks 1n series, and the terminal wires connected with the 3. In an incandescent electric lamp, the

combination with a bulb, and a glass stem molded in the neck of the latter and having collars upon it; of hangers and hooks molded in and projecting beyond the edges of the upper and lower .coll'ars, a group of filaments connecting said hangers and hooks, and the terminals molded between the neck of the bulb and the upper end of the stem and connected with said filaments.

4. In an incandescent electric lamp, the combination with a'stem having a pair of disks; of a crescent-shaped hanger comprising a curved wire frame having an arm projecting from its centerand molded between said disks and pins projecting toward each other from its extremities, and a curved wire bow standing within the frame and having eyes at its extremities mounted on said pins, and the filaments-connect'ed'with thellatter. 1

In testimony whereofl have hereunto set my hand in presence oftwo subscribing witnesses.

EARL H. TATE.

lVitnesses:

C. W. CONWAY, M. KALTME ER.

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