Improvement in Incandescent Lamps.
Year: 1899

page_text: Date of Application, 29th July, 1899-Accepted, 21st Oct., 1899
Improvement in Incandescent Lamps.
I, ALFRED ABERNETHY COWLES, of 249, West 72nd Street, in the Borough of
Manhattan, City, County and State of New York, United States of America,.
Manufacturer, 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:-
My improvement relates particularly to a kind of incandescent lamp in the
burner of which there is a base extending from a- tube supplying a mixture of
gas and air a perforate tube mounted upon the base and delivering the mixture of
air and gas therefrom, an outer imperforate shell, engaging with the base,
passages at the top of the outer shell for the emission of the mixture of gas and
air, and a support for an incandescent mantle. This type of incandescent lamp
is designed for use without a chimney. Between certain parts of this burner is
a detachable joint.
I
My improvement consists in a shade or globe holder formed in the same piece
of metal with one of two parts secured by a detachable joint, and extending
from the burner suitably to fulfil its function. I prefer to make the shade or
globe holder integral with the said base of the burner, or with the outer imper-
forate shell above mentioned.
In the accompanying drawings Figure 1 is a semi-vertical section of a lamp
embodying my improvement. Figure 2 is a top view of the same.
This
Similar letters of reference designate corresponding parts in both figures.
A designates a tube which at its lower end receives gas from a nozzle a.
nozzle is made in a separate piece from the tube, and the two parts are united
by a screw thread. Just above its lower end the tube A is provided with open-
ings a¹ for the entrance of air. The gas and air pass up the tube together as a
mixture. At the upper end the tube is provided with a laterally extending
flange a, here shown as inclining slightly upward, and is provided at its outer
circumference with an upturned rim a This flange constitutes the base of
the lamp burner. Mounted upon this base is a conical or conoidal tube B which is
perforate. The mixture of air and gas escapes from the perforations of this
tube. Surrounding this tube is a shell C which is shown as contracted upwardly.
I term it the outer shell of the burner. It is mounted upon the base a² of the
burner. It is shown as engaged by a screw thread with the interior of the rim a³.
About level with the top of the outer shell C a disc D is arranged, and this
has a serrated edge through which the mixture of air and gas escapes to a
mantle E supported by rod e.
F designates a shade or globe holder which is here shown as made in the form
of a flange extending laterally from the rim a³. It is made integral with said
rim, and in the same piece of metal. It may advantageously be perforated;
indeed, it may be made of a skeleton-like structure, and notably with a number
of arms as shown. Instead of having it extend from the base of the burner
it may extend from the outer shell C.
A shade holder thus made integral with an essential part of the burner, may

page_text: be made very much smaller than if made separately, and provided with some
part for attachment to the burner. This is a very great advantage, not only
because of saving of metal, but because it will minimize shadow. Not only
is there a saving in metal due to the fact of reducing the size of the shade or
globe holder, but in the labor and other expenses of manufacture there are
incidental savings of an important character. Moreover, a shade holder when
made integral with a part of the burner is mechanically superior to one attachable
thereto, because it will be more rigid, and will not be liable to displacement
under any circumstances unless by bending.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed; I declare that what
I claim is:
:
1. The combination with an incandescent lamp having two parts united by a
detachable joint, of a shade or globe holder made integral with one of said parts,
and extending suitably to fulfil its functions, substantially as specified.
2. The combination with an incandescent lamp whose burner has a base and
a shell extending from the base, of a shade or globe holder made integral with
one of said parts and extending suitably to fulfil its functions, substantially as
specified.
11
1
1000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.