A New or Improved Laboratory Gas Furnace.
Year: 1897

page_text: A New or Improved Laboratory Gas Furnace.
I, GEORGE THOMAS HOLLOWAY, of 57, Chancery Lane, London, Consulting
Chemist and Metallurgist, do hereby declare the nature of this invention to be as
follows:
The furnace is rectangular and is made of fireclay. It has the burner at one
end and the chimney at the other end as in ordinary reverberatory laboratory gas ·
furnaces for receiving one or more crucibles, muffles &c.
The furnace consists of three or more separate parts; (a). A part forming the top,
back, and two ends of the furnace. In one end is an opening to receive the burner
and in the other end is an opening over or into which the chimney is fitted.
(b) A plate forming the bottom of the furnace but extending some distance in
front so that the door or doors of the furnace, when drawn open may still stand
upon the plate. (c). The door or doors which stand at the front of the furnace..
The door consists of a flat plate with a wide flange running down the middle from
top to bottom and forming a handle and also serving to prevent the door from
falling over.
All these parts are made of fireclay. The parts (a) and (b) may be made with
flanges or projections or may be interfitted or otherwise formed so that jarring
&c. shall not displace the part (a) upon the part (b), but in order that the latter
may be turned over to expose a clean surface as a bottom to the furnace when
desired, it is preferable to have two or more holes made in the parts (a) and (b) so
that they may be secured together by removable iron or other pins.
By thus constructing the furnace, the original cost and the danger of cracking
are lessened, a new bottom can be applied at any time and the front extension of
the bottom forms a convenient support for the doors. The parts may be bound
with iron bands as usual with gas furnaces.
Dated this 17th day of September 1897.
A New or Improved Laboratory Gas Furnace.
I, GEORGE THOMAS HOLLOWAY, of 57 and 58, Chancery Lane, London, Consulting
Chemist and Metallurgist, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
The furnace is rectangular and is made of fireclay. It has the burner at one

page_text: end and the chimney at the other end as in other reverberatory laboratory gas
furnaces, for receiving one or more crucibles, muffles, roasting dishes, cupels &c.
The improvements are shown in the accompanying drawings in which Fig. 1
shows the furnace in perspective with two doors, one of which is drawn aside to
permit access to the furnace. Fig. 2 shows a sectional plan and Fig. 3 a sectional
elevation along the line AA of Fig. 2.
1
The body b of the furnace is made separate from the bottom a which is a flat
rectangular plate extending forward beyond the body sufficiently to form a support
for the door or doors c when the same are drawn aside. Holes d are preferably
provided in the parts a and b so that the same may be secured together by dowel
pins, or interfitting shoulders and recesses or other parts may be formed on the
parts a and b or they may be otherwise secured to prevent one part from moving
upon the other. The parts may be secured by iron bands to minimize weakness
from cracking.
By this arrangement, the furnace is more cheaply made and more easily trans-
ported and the part a may be reversed to provide a clean bottom for the furnace
when spoiled on the upper surface by slag &c.
The gas burner & chimney are of any suitable construction and are suitably
fitted to the holes e on the body b, the burner to one and the chimney to the
other.
The doors care provided with 'flanges c¹ which support them and form handles
by which they can be moved. The furnace may have one or two or more doors
according to its length. A convenient size for the furnace is thirteen inches long
inside, the other dimensions corresponding as shown by the drawings, the parts
being preferably one and a half inches thick throughout, but the dimensions may
be varied acording to requirements.
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:-
A laboratory gas furnace in which the base and the body are made separate but
preferably secured together by dowel pins or otherwise, the base extending beyond
the body as shown, to form a stand for the door or doors when the same are drawn
forward.