Improvement in Electric-arc Lamps.
Year: 1894

page_text: Date of Application, 12th Oct., 1894
Complete Specification Left, 12th July, 1895-Accepted, 17th Aug., 1895
PROVISIONAL SPECIFICATION.
Improvement in Electric-arc Lamps.
1, GEORGE GALE STOUT, of Parkersburg, West Virginia, U.S.A., Inventor,
do hereby declare the nature of this invention to be as follows:-
The object of this invention is to provide means whereby the carbons of electric-
arc lamps are caused to last much longer and to burn with a steadier light than
hitherto.
By this my invention I enclose the carbons in a preferably round, cylindrical
This case is constructed telescopic, so as to permit of access
and transparent case.
to the carbons, and is attached to and forms part of the lamp.
Dated this 19th dox of October 1804
W. H. MUNNS,
Agent for Applicant.
I, GEORGE GALE STOUT, of Parkersburg, West Virginia, U.S.A. Inventor
do hereby declare the nature of this invention and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement:-
This invention has for its object to provide an electric are lamp with means for
excluding the air and drafts from the carbons to that extent as will enable a more
perfect and steady light to be obtained with an increased volume, as well as economy
in the use of carbons, which objects are attained by the device substantially as
shown in the drawings and hereinafter described and claimed.
Figure 1 of the drawings represents a side elevation of an electric arc lamp
showing the globe in dotted lines and the device constituting my invention in
vertical section, Fig. 2 a side elevation of the device removed from the lamp.
In the accompanying drawings A represents the usual frame for supporting the
lamp which may be of the ordinary construction and a the bottom carbon holder
and b the usual band for holding the globe, said globe being shown in dotted
lines.
The device which constitutes my invention consists of the three tubular
sections B, C, D, the upper section B being telescoped upon the upper end of
the middle section C and held in place by frictional contact with a cylindrical
tapering coupling E secured by screws or any other preferred manner to the
upper portion of the frame A. These several tubular sections inclose the
carbons cd, the upper one of the carbous being retained in position by the usual
holder e.
The lower section D may be the same diameter throughout its length as
shown in the drawings or may have a swell or bulge at its centre or suitably
enlarged as may be found most desirable. The section D is constructed of glass
and of sufficient height to reach above the point where the carbons meet so that
the light will not be obstructed. This tubular section rests upon a supporting
plate F which has an upwardly extending retaining flange therefor, and an
IDI

page_text: insulator is interposed between the plate and the bottom of the frame A. The
tubular sections B, C, are constructed of metal or of any other material found most
preferable, the section C having a suitable coupling for detachably connecting it
to the section D at its upper end, said coupling in the present instance consisting
of a circumferential flange to overlap the edge of the glass section and connected
thereto by a set screw. i. The upper section is held in position by frictional
contact with the cylindrical tapering coupling E, the coupling being made tapering
for this purpose so that a tight fit of the section upon the coupling will be secured
sufficient to hold the section suspended to form a continuous tube of the three
sections.
The coupling E may have perforations k for the escape of the accumulated gas
instead of passing up into the works of the lamp. When it is desired to renew the
carbons, the section B is slipped down over the section C to enable the rod 7 of the
carbon-holder e to be raised up into the body of the lamp by catching hold of
the rod with the fingers.
When the rod is raised sufficiently to elevate the carbon c so that its lower end
will be above the top of tubular section B, the several tubular sections may be
removed to admit the renewal of carbons.
The several tubular sections provide an inclosure for the carbons that will prevent
to an extent the air from interfering with the light that is generated.
The upper and lower ends of the tube, formed by the sections herein described,
are closed so as to exclude the air and drafts from the carbons to that extent as
would enable a greater steadiness of light to be obtained with an increased
volume.
The circulation of air through the tubular section being prevented by the
closing of both top and bottom has the effect of saving in the combustion of carbon,
and, moreover, the tubular section provides a perfect spark arrester inasmuch as it
confines the sparks thrown off by the carbon points within the tube.
A further advantage in the inclosure for the carbons formed by the tubular
sections, is that the dust thrown off by the consumption of the carbons will be
confined in the tubular sections and prevented from coming in contact with any
object thereby enabling the lamp to be used in stores and other inclosed places
where it has heretofore been excluded on account of the fine particles of carbon
escaping into the atmosphere and lodging upon goods or in a store, or upon objects
that would cause damage thereto.
Having now particularly described and ascertained the nature of iny said
invention, and in what manner the same is to be performed, I declare that what
1 claim is
An inclosure for the carbons of an electric arc lamp, consisting of a stationary
tubular section of transparent material, a tubular section detachably connected
thereto by means of a suitable coupling, and a tubular section slidable thereon and
a tapering tubular coupling for holding suspended the slidable section, substantially
as and for the purpose set forth.
Dated this 12th der of July 100%
W. H. MUNNS,
Agent for Applicant.