Year: 1886

page_text: Date of Application, 29th July, 1886
Complete Left, 28th May, 1887.
Complete Accepted, 26th July, 1887.
[Communicated from abroad by HENRY WELLINGTON, of Brooklyn, Kings County,
State of New York, United States of America, Manufacturer.]
I, WILLIAM PHILLIPS THOMPSON, Fel. Inst. P.A. of the Agency for Foreign
Patent Solicitors, 6 Lord Street, Liverpool, in the County of Lancaster, and
323, High Holborn, in the County of Middlesex, Civil Engineer, do hereby declare
the nature of this invention to be as follows:-
This invention has relation especially to that class of portable heating apparatus
ordinarily employed by plumbers' and others, chiefly for melting lead, heating
soldering irons and for analagous purposes, and commonly known as plumbers'
furnaces, but as will be readily understood the improvements are applicable in any
analagous heating devices.
The object of this invention is to produce a simple, cheap durable, and effective
furnace wherein naptha, gasoline, or other light hydrocarbons or easily vaporizing
material may be employed for producing the required heat, and this without danger of
explosion, overheating or other accidents.
The receptacle for the liquid fuel is in the base or lower part of the apparatus,
which base forms the foundation upon which the other parts are mounted, and into
which they are connected.
The bottom piece is preferably made of cast metal and may be provided with short
legs or feet. Upon the bottom piece is a shell of spun or stamped metal constituting
the sides and top of the fuel chamber. The shell is soldered to the bottom and is
further secured thereto by a screw bolt located inside the shell.

page_text: The receptacle for the vessel or irons to be heated is sustained above the fuel
chamber upon standards connected into the bottom plate. One of these standards at
least is made in the form of a pipe or tube upon which the burner is mounted, and
through which the oil is supplied. The upper receptacle has a hinged top and a
hinged side door, and upon the interior, arms which in connection with the door,
sustain the soldering irons in proper position to be heated. A cone or wind guard
projects from the bottom of the upper receptacle so as to protect the flame. The
burner is of the class known as vapor burners, and has a channel around the wall of a
central opening, through which opening the gas is projected. Gas from the gas jet
orifice enters a bent tube leading to the central opening and carries with it a quantity
of air for combustion. The flow of gas is regulated by a needle valve of which the
stem is practically horizontal and placed within convenient reach of the operator. A
perforated shell with an interior deflector surmounts the main part of the burner, and
insures the proper burning.
The oil is fed to the burner through the standard above mentioned by air pressure,
the pressure being produced by means of an air pump located within the oil chamber
and having its piston rod projecting through to the exterior. The pump is sub-
merged, and the air forced in by it passes to the upper part of the oil chamber through
a small tube provided for the purpose.
A tube sustains the inner end of the pump barrel, and through this tube access to
the valve (for removing it when required) may be had from the exterior without
dismounting the pump.

page_text: State of New York, United States of America, Manufacturer.
I, WILLIAM PHILLIPS THOMPSON, Fel. Inst. P.A. of the Agency for Foreign
Patent Solicitors, 6 Lord Street, Liverpool, in the County of Lancaster, and 323 High
Holborn, in the County of Middlesex, Civil Engineer, 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 relation especially to that class of portable heating apparatus
ordinarily employed by plumbers and others chiefly for heating soldering irons,
melting lead, and for analogous purposes, and commonly known as
"plumbers
furnaces but as will be understood from the following description, the improvements
are likewise applicable in any analogous heating devices.
"
The object of this invention is to provide a simple, cheap, durable and effective
furnace, wherein naptha, gasoline or other light hydro-carbons or easily vaporising
material may be employed for producing the required heat, and this without danger
of explosion, over heating, or other accidents,—to make the device portable, compact,
and convenient to handle and use.
To this end the invention involves certain novel and useful peculiarities of con-
struction relative arrangements or combinations of parts and principles of operation,
all of which will be herein first fully described and then pointed out in the claims.
In the accompanying drawing forming part of this specification, Figures 1 and 2
are views of the improved furnace, partly in section and partly in elevation, the
burner view being upon a plane through the axis of the pump and the latter upon a
plane through the axis of the burner. Figure 3 is a plan view showing both doors
or lids in open position. Figure 4 is a horizontal sectional view of the burner upon
a plane passing through the annular bore, and Figure 5 a vertical section through the
axis of the burner.
Figure 6 is a perspective view of the deflector detached, and figure 7 is a horizontal
section through xx of figure 5.
In all these figures like letters of reference wherever they occur indicate
corresponding parts.
The receptacle for the liquid fuel is in the base or lower part of the apparatus of
which base A is the bottom piece, preferably of cast metal, constituting the foundation
upon which the various parts are mounted and serving as the bottom plate of the

page_text: liquid fuel reservoir or receptacle. This piece is made sufficiently heavy to withstand
the various concussions to which it may be subjected and to make the base solid and
substantial. It may or may not be provided with the short legs or feet a a.
B is the shell of the reservoir, constituting the top and side walls thereof. This
shell is made of spun or stamped metal for economy, accuracy, and facility of
manufacture. It is secured to the base piece A by the interior connecting rod D
which enters a threaded socket as at C in the base piece, and the joint between the
margin of the shell and the base piece is made perfectly liquid tight by solder applied
upon the exterior. The bolt or rod D holds the shell firmly to its place and prevents
any disturbance of the soldered joint.
The receptacle for the vessel to be heated or for the soldering irons is mounted
above the oil chamber upon vertical standards as E. F. G. one of which at least is
hollow as will be hereafter explained.
This receptacle is made up of a horizontal plate or ring H, preferably of cast
metal, from which rises the conical shell I, secured at the exterior of the ring, and
from which depends the conical shell J secured at the interior of the ring. The
shell J constitutes a wind guard for protection of the flame and a conduit or director,
for the heat arising from the burner. The standards E. F. G. are secured at bottoni
in the base piece A and at top in the plate or ring H. K is the side door or lid
covering the opening through which. soldering irons and other articles are introduced
to a position above the flame. This lid is hinged so that when opened it will be held
by the hinges k. k. at a substantially horizontal position affording a rest for the
handles of the irons etcetera exterior to the shell I. L is the top door or lid covering
the upper opening in the shell I through which any vessel or kettle may be introduced.
The interior supports for the irons and the vessels are arranged so as to answer for
either without detracting from the heating capacity of the device. M. M. are two
arms radially located and projecting slightly over the central opening in ring H, and
N is a bar crossing the opening near its margin, the arms and bar being sustained by
the ring preferably cast therewith. The bar is located opposite the door K. The
inner ends of irons etcetera, rest upon the bar and are thus with door K, sustained in
proper position to be heated, while the short arms M. M. in no way interfere with the
introduction, removal, or heating of the irons. While the irons are being heated the
top door or lid is usually kept closed. To prevent this lid from being damaged by
excessive heat it is protected by a plate as L' secured upon its under side.
The door L being opened, any vessel may be introduced through the top of the
furnace and will be supported at bottom at three points, namely on the bar and on
the two arms, in the best position to receive the heat and in a manner to insure against
accidental upsetting.
The burner is of the class known as vapor burners and is adapted to convert the
liquid fuel into gas or vapor before combustion. It is located for the greater part
within the wind guard J. Liquid fuel is supplied to the burner from the reservoir
below.
The standard E furnishes a liquid conduit from the reservoir, being made to com-
municate with the lowermost portion of the reservoir through a short tube as at e
which enters the socket into which the lower end of E is secured.
4
Within the reservoir is an air-pump of which O is the main cylinder and P the
piston rod.
The main parts of the pump are submerged in the oil or liquid, and the pump
barrel or cylinder is preferably passed through an opening in the base piece A and a
tight joint secured by means of solder or otherwise.
The inner end of the pump barrel is connected with a tube O' which passes through
the base piece and has its outer end closed by a suitable plug 0 Within the tube O¹
is a spring b carrying a valve as c which closes an orifice in the inner end of the
pump barrel. Connected with O is a tube d leading to the upper part of the
reservoir and adapted to deliver the air from the pump at a point above the oil or
liquid in the reservoir.

page_text: By removing the plug 02 the spring and the valve can be easily removed and
replaced whenever required, and this without danger of leakage of oil.
The pressure of air produced by the pump forces the liquid fuel to the burner. Of
the burner is the conducting tube connected with standard E. This tube is enlarged
to form the head of the burner represented at g, figure 3, through which is the central
air and gas passage h, the oil channel i being formed around this central opening being
cored out in the casting. From the end of tube depends a short tube / containing
the gas jet orifice which is controlled by a needle valve m the stem of which is sub-
stantially horizontal. Beneath the passage is the air and gas conducting tube u, the
same being curved or bent as shown so as to receive the gas from the gas jet orifice.
The tubes of the burner are all cast together so as to make the burner solid and
strong. It will be observed that the heat conducting tube and central air and gas
opening in the burner are in the same level which makes the burner cheap and easy
to construct as well as compact. An obstruction or deflector as o is located in the
upper mouth of the passage / serving to retard the flow of air and gas so that it may
be properly burned. The air and gas escapes through the passages around the
deflector and is burned within and outside of a perforated cylinder 9 which surmounts
the burner head. At ris the drip cup the uses and purposes of which are well known.
Qis the bail or handle by which the furnace may be carried about, the same being
capable of being hinged or pivoted to the plate H and turned down out of the way
when required. When in upright position the bail is sustained by notched block as
s, immovably mounted upon the shell I and into the notches of which the bail is
sprung.
at
h
R is a feeding funnel applied in the upper part of the reservoir and S is a plug by
which the feeding orifice is closed in an air tight manner.
The improved furnace is found to afford a very intense heat and this at small
expense for fuel. It may be used for any purpose and is found to be compact, easily
moved as required, and generally to be well adapted in all respects for the purposes
intended.
Having now particularly described and ascertained the nature of the said invention,
and in what manner the same is to be performed, as communicated to me by my foreign
correspondent, I declare that what I claim is :-
1st. In a portable furnace, the base, the liquid reservoir, the receptacle for the
articles to be heated sustained upon and located above said reservoir and provided with
side and top doors and interior supports for the articles as explained, a vapor burner,
supply pipe leading thereto, and an air pump arranged to force air into the reservoir,
combined and arranged substantially as and for the purposes set forth.
1.
2nd. In a portable furnace the combination with a vapor burner supported above
the reservoir, of a receptacle for the articles to be heated, said receptacle being open
at top provided with side and top doors, interior supports and with a depending neck
which surrounds the burner and located above the reservoir and rigidly connected
therewith, substantially as and for the purposes set forth.
3rd. The combination with the receptacle connected with and supported above the
liquid reservoir, of the hinged bail and the notched lugs fixed upon the receptacle
substantially as and for the purposes set forth.
4th. In a portable furnace, the combination with the receptacle for the articles to be
heated, of the top and side doors and the interior supports arranged substantially as
shown and described.
5th. In a portable furnace, the combination with the receptacle for the articles to be
heated of the radial arms and cross bar located and arranged within the receptacle
substantially as shown and described.
6th. In a portable furnace, the combination with the wall of the receptacle for
articles to be heated having the top door and the interior supports of the side door or
lid hinged as explained and operating as a support for the articles, substantially as
shown and described.
7th. In a portable furnace, the combination with the pump barrel of the spring

page_text: inclosing tube, the removable plug applied upon the outer end of said spring inclosing
tube, the spring, and valve substantially as shown and described.
8th. The vapor burner having the central air and gas passage, the oil channel
formed around the same, the deflector, perforated shell and the oil supply pipe, all
constructed, substantially as shown and described.
9th. The combination with the burner head having the central air and gas passage
and the annular oil channel surrounding the same, the deflector located in said passage,
substantially as shown and described.
10th. In a portable furnace the vapor burner connected with one of the standards
supporting the receptacle for articles to be heated, the said burner having the curved
air and gas director tube, and the horizontal needle screw, all combined and arranged,
substantially as shown and described.
WM. P. THOMPSON & Co.,
Agents for the Applicant.