US994427A - Electric-arc lamp. - Google Patents

Description

I D' A. ROSS. ELECTRIC ABO LAMP. 211101111011 111.1111 un. s. moa.

994,427, 1 Patented Jungs, 1911.

B BHEETB-BHEBT 1.

0.- A. ROSS.

ELECTRIC ARG LAMP.

ArrLloA'rIoN FILED H1B. 9, 1903.

994,427, Patented June 6, 1911.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

OSCAR A. ROSS, OF CHICAGO, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO ALBERT H. MEADS, OF CHICAGO, ILLINOIS.

ELECTRIC-ARG LAMP.

Specication of Letters Patent.

Application led February 9, 1903.

To all whom 'it may concern.'

Be it known that I, OSCAR A. Ross, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Im rovements in Electric-Arc Lamps, of whic the following is a full, clear, and exact description.

This invention relates to that class of electric devices commonly known as arc lamps, and more especially to the division designated as inclosed, or long-burning arcs; that is, those in which the arc is inclosed in a practically air-tight chamber, which inclosure serves to retard oxidization of the electrodes. Such arcs burn from twelve to twenty times as long as the open type, between trimmings, and their economy is therefore obvious. Inclosed arcs have other advantages of operation which need not be speciied here, as they are well known and remain unchanged in the present case.

The principal object of my invention is to furnlsh new means for inclosing the electric arc in a comparatively air-tight chamber, while at the same time permitting free and ready access to the electrodes, so that the may be easily and quickly changed.

Vl'hile many arc lamps are used without the external lobe, it is customary to employ such a g obe, and much of the light'is lost in this manner, while in every case the inner lobe requires frequent cleaning and is often roken in handling and by the intense heat of the arc. Furthermore, after even very limited use, the light from the arc is obscured by the soot thrown oil by the carbons, deposited on the interior of the globe and quickly baked thereon by the heat, making the cleaning of the globe slow and diioult. The small size of the common arcinclosing globe and the consequent close proximit of the arc to the glass, aggravate these di culties.

A special object of my invention is to simplify the lamp by using but one inclosing glass, substantially hemlspherical in shape and of such size that proper diiusion of the rays of the arc will be obtained, while all parts of the glasslare so far removed from the arc that the objections common to other types will be eliminated. l

The operating arts of the`lamp herein referred to are pre erably similar to those described and claimed in m application for patent filed May 29, 1902, eral No.109,450, but my improved inclosin hereinafter described may e used in connection with almost any of the inclosed arc lamp operating mechanisms `at present on the market.

My invention is illustrated inthe accompanying drawing, in which:

Figure l represents an elevation of the lower part of the lamp in its operating position, with the inclosing chamber closed; Fig. 2 is a sectional elevation showing the chamber open; Fig. 3 represents the combined hinge and springs, and Fig. 4 the combined catch and springs.

A is a plate or cover forming the stationary top of the arc-inclosing chamber and provided with a downwardly extending Hnge having a horizontal portion a at its e ge.

C is a suitable frame in the form of a flanged rin surrounding the stationary cover and adapted to carry the hinge and catches hereinafter referred to.

B is the inclosing glass or globe forming the body portion of the chamber; it is in the shape of an inverted dome, its up er edge having a ground flange 51 surroun ed by a metal ring b having a lange 52 upon which the edge of the globe rests. The rlng b3 is provided at one point with a loop 53 which embraces a U-shaped clip 54:, the arms of which pass through openin s in the frame C and are each embraced y s rin b tendin to draw the globe upward). il' the opposite point of the ring b is a li b adapted to be engaged b a s ring cato b consisting also of a U-s ape clip passing through holes in the frame C and having springs b* which tend to draw the globe upward when the catch is in engagement therewith. When the glass is closed, it will be seen that the right-hand side of the u per edge of its flan e 51, is held irmy against the under si e of the flange a of cover A b the action of sprin s b, while the left si e of the glass is sim' arly seated rmly on the corresponding side of the iange of cover A. It is thus evident that whenever the chamber is closed, provided the glass B has an even edge and is ground to its seat on cover A, the combined action of springs b* and b will hold the glass globe-chamber rmly against its seat on flanged forming an air-tight joint between the two parts and thus perfectly adapting the chamber to its purpose.

2l is the positive electrode, feeding through the hole 22, in a gas check plate of ordinary construction.

23 'is the negative electrode, removably secured in its holder 24, which is suspended from plate A.

The solenoid and other parts of the lamp operating mechanism are not shown, as they form no essential feature of my present invention.

While the glass B is preferably bowlshaped, as shown, for purposes of better diffusion of the light of the arc, I do not limit my invention to any special shape of glass, or to any special number of hinges or springs.

When it is desired to open chamber B for the purpose of changing the electrodes, the catch b is pulled down and outward by its lower end (see Fig. 2) which serves asa loop handle, its upper end passing through and being held by springs 4 aga-mst stops 55. This allows the ring b3 and glass B to swing downward on hinge 53 to the position shown in Fig. 2, and access is thus had easily and quickly to the chamber. When the ring is forced upward until the glass B seats against flange a, it is evident from the foregoing description that the catch b will, when snapped' out of engagement with stops 55 and into place under the lip be, lock the flange 51 against cover A and maintain chamber B in proper position for its intended purpose. It will be further seen that in raising the ring bs and glass B to the closed position, the flange 51 rst seats on the left side of flange a, and then as the glass is gra'dually closed, the hinge 53 is orced downward against the resilience of spring b5, the left side of ange a acting in such movement as a fulcrum for the glass; and the tension thus produced in spring b5 is of course maintained when and after the chamber is closed and catch b snapped. When the catch b is ulled down and outward to release the ring the upper ends thereof engage the stops 55 as heretofore described, and the catch is thus held in this position (see Fig. 2). When it is desired to close the inclosing chamber the catch is pulled downwardly and inwardly so as to be released from the enga in device, and is then hooked over the lip e whereupon the springs associated with the hinge and the catch ress the ringA tightly against the cover The frame C is supported in any desired manner so as to support the globe B in proper relation to the carbone.

Having described my invention, I claim:

1. An arc lamp comprising an arc-inclosing casing having a stationary cover, a movable inclosing part adapted to engage said stationary cover and provided with a hinge, aI support for said hinge and an elastic connection between said support and the hinge which permanently connects them together.

2. An arc lamp comprising an arc-inclosing casing, having a stationary cover, a movable inclosing part adapted to engage said stationary cover and provided with a hinge, a support for said hinge, an elastic connection between said support and the hinge, a catch attached to said support and adapted to engage and disengage said inclosing part, and an elastic connection between the catch and the support whereby the inclosing part is elastically forced into engagement with the stationary cover.

3. An arc lamp comprising a'stationary cover, a ring coperating therewith, a glass supported by said ring, a hinge connected with said ring, a support for said hinge, a spring interposed between the hinge and the support .so that it may be moved toward or from the support, and a catch fastened to said support removably engaging said ring.

4. An arc lamp comprising a stationary cover, a ring coperating therewith, a glass supported by said ring, a hinge connected with said ring, a support for said hinge, a spring interposed between the hinge and the support so that it may be moved toward or from the support, and a catch on said support adapted to engage said ring and elastically connected with the support whereby the ring is forced against the cover when the parts are in their closed position said catch adapted to be disengaged from said ring to permit the glass to move about said hinge.

5. An arc lamp comprising an arc-inclosing casing having a stationary cover, a ring associated therewith, a hinge attached to said ring, comprising a longitudinally movable part to which said ring is connected, a support therefor, and a spring interposed between said longitudinally movable part and said support whereby the ring may be moved to and from said support.

6. An arc lamp comprising an are inclosing casing having a stationary cover, a ring,` a glass supported by said ring, a hinge connected with said ring, comprismga U-sha ed clip upon which said ring is mounte a support for said U-shaped clip, and a spring interposed between said U-shaped clip and its support whereby it may be moved to vary the position of the ring.

7. An arc lamp comprising an arc inclosing casing havin a stationary cover, a ring, a glass supporte by said ring, a hinge connected wlth said ring, comprising a U- shaped clip upon which said ring is mounted, a support for said U-shaped clip, a spring interposed between said U-shaped clip and its support whereby it may be In witness whereof, I subscribe my signamovlflidf to vary the Eoston of tle ring, ture, in presence of two witnesses.

cate or en agn t e o poste si e of sa' y 1 1 ring providegd Witig'h a, pllojeotng part, and OSCAR A' Robb' a spring associated with said projecting Witnesses:

part and engaging said support whereby the H. C. CLARK,

catch may be moved longltudinally. W. H. CLARKE.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. Il.

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