Heating Drum for Lamps.
Year: 1897

page_text: Date of Application, 20th Aug., 1897-Accepted, 2nd Oct., 1897
Heating Drum for Lamps.
I, ROBE CARL WHITE, of 154 Western Avenue North St. Paul, Ramsey County,
State of Minnesota, United States of America, Lawyer 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 relates to improvements in heating drums for lamps, and con-
sists in the following described features of construction.
In the accompanying drawings forming part of this Specification;
Fig. 1 is an elevation of the improved apparatus, partially broken away to show
the interior construction;
Fig. 2 is a modified form of the same;
Fig. 3 is a plan view of the construction shown in Fig. 2;
Fig. 4 is a modified construction of the form shown in Figs. 2 and 3, and
Figs. 5 and 6 are details.
In the drawings (see Fig. 1) let A represent a cylindrical drum, the side walls 2
of which are made preferably of sheet metal, while the heads 3, 4 and 5 are
preferably cast metal. The head 3 is of annular form and double, having its inner
or upper wall 6 arched and slitted, or otherwise perforated to allow the passage of
air therethrough, and serving to distribute it around the interior of the drum.
The outer or lower wall is formed with necks or collars 7 downwardly projecting
to receive the tubular standards or legs B, which are formed of telescoping
sections 8 and 9. The head 3 is perforated in line with the collars so as to admit
the air from the standards B, which have lateral openings 10 near the bottom
for the cold air, the sections being also secured together by means of set screws 11
to adjust the height of the drum.
The head 3 is formed with an upwardly projecting outer flange 12, within
which the cylindrical side wall 2 is placed, and which is held in place by the
securing bolts or rods 13. On the inner edge of the head 3 stands the conical
cast metal pipe or conduit 14, which has an offset flange 15 at its top to serve as
a seat for the cylindrical cast metal pipe 16..
Arranged upon the interior of the drum, and near the bottom, is the conical
deflector 17, the lower edge of which is seated within an outward corrugation or
bead 18 of the drum, and serves to throttle the space between the drum and
pipe 14 to direct the air entering through the slits in the base toward and against
the pipe. Similarly intermediate of the deflector 17 and the top of the drum is
an inverted conical deflector 19 seated upon a rib or shoulder 20 upon the pipe 16,
and serving to deflect the rising air against the walls of the drum A.
On the top of the drum A is arranged a drum C, of greater diameter than the
drum A, the side walls 21 of which are preferably sheet metal, and held in place
by flanges 22 upon the edges of the heads 4 and 5, and the securing rods or
bolts 13. The side wall 21 is provided with perforations 23 around its periphery
serving as air outlets.
The portion of the head 4 which is immediately above the annular chamber
between the drum 2 and pipe 16 is formed with perforations or open work 24 next

page_text: the pipe 16, thereby serving to throttle the passage and distribute the air as it
rises into the upper drum. The head is also formed with an opening 25 concentric
with the pipe 16, and of smaller diameter, to throttle the passage in the pipe and
assist in the heating operation.
In use the apparatus is adjusted to the dimensions of the lamp by the set
screws 11, the lamp chimney being inserted into the funnel shaped pipe 14 into
and through which the products of combustion from the lamp flame pass together
with the cold air entering around the lamp chimney. The standards B are of
such size that they will furnish in connection with the space around the lamp
chimney sufficient air to prevent overheating of the drums.
In the construction shown in Figs. 2, 3 and 4, the standards B open directly
into the interior of the drum 26, while the funnel shaped pipe 27 conducts the
products of combustion from the lamp chimney into and through the pipe 28,
thence into the interior of the drum. In the construction shown in Figs. 2 and 3,
the horizontal radiating pipes 29 at the top of the drum serve as outlets for the
heated air and products of combustion, the ends of the pipes being preferably
closed by netting 30. In the construction shown in Fig. 4, the radiating pipes
are dispensed with, and simply openings 31 in the periphery of the top of the
drum serve as outlets for the gases. The top of the drum may be provided with
a central opening closed by a lid 32, which may be removed to admit a vessel to
be heated.
Having particularly described and ascertained the nature of said invention,
and in what manner the same is to be performed, I declare that what I claim is:
1. In a heating apparatus of the class described, in combination the drum
having lateral vents at its top, the hollow, adjustable, air conducting standards
opening into the bottom of said drum, and supporting the same, and the funnel
shaped pipe on the interior of the drum adapted to be fitted over the lamp
chimney, and opening into the interior of the drum.
2. In an apparatus of the class described, the combination with the cylindrical
dram, of the hollow, air-conducting standards supporting and communicating
with the same, the conical pipe for the inlet of the heated gases arranged axially
in the drum, the deflectors arranged in the space between the drum and pipe, the
constricted openings above the funnel and the annular space between the funnel
and drum, and the drum of larger diameter arranged above, and in communication
with, said openings, and provided with lateral outlets.
In an apparatus of the class described, the combination with the cylindrical
drum, of the annular base formed with double walls constituting an annular
chamber or conduit, the upper wall being formed with perforations serving as
distributing outlets for the chamber, the openings in the bottom wall to connect
with hollow, supporting, air-conducting standards, the conical axially arranged
pipe within said drum, the connecting cylindrical pipe serving as a continuation
of said conical pipe, and the deflectors intermediate of said pipes and drum.
Dated this 20th day of August 1897.
F. WISE HOWORTH,
46 Lincoln's Inn Fields, London, W.C., Agent for the Applicant.