Pear-Burner Page: 3 of 3
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cap 6 and into this compartment, being
held in position by aid of a boss 22. " The
burner head 17 may, if desired, be an ordi-
nary pipe section and the burner tip 18 may
5 be of any approved construction but in this
instance is made massive in form in order
to enable it to withstand heat. The burner
head 17 may be threaded internally at 19
and screwed on the pipe section 16a, but
10 the precise manner of its attachment is im-
material. The inner end of the pump cyl-
inder 7 is secured to an angle block 23 the
latter being provided with an L-shaped
passage 24 which merges into a recess 25.
15 A valve casing 26 having a cylindrical form
is secured to the tank 4 and extends radi-
ally inward therefrom being secured at its
inner end to the angle block 23. A nipple
is shown at 27 and extending inwardly
20 from this nipple is a valve rod 28 carrying
a number of valve cups 29 made in this
instance of leather. The valve casing 26
is provided with two small holes 30 through
which air is forced into the tank 4. A
25 pump rod is shown at 31 and carries a cup
valve 32 and a handle 33. When the pump
rod 31 is reciprocated by aid of the handle
33, air is forced into the tank 4 and coin-
pressed. If now the tank contains a sup-
30 ply of liquid hydrocarbon fuel and a por-
tion of this fuel is within the compartment
21 and air is pumped into the tank as above
described, the air pressure tends to expel
the hydrocarbon fuel through the pipe sec-
35 tions 9, 11, 13, the heating coil 16 and bur-
ner tip 18.
The operation of our device is as fol-
lows: The parts being assembled as above
described and a quantity of liquid hydro-
40 carbon fuel having been placed in the tank,
the pump handle is operated as above de-
scribed, and heat being applied to the.heat-
ing coil 16 so as to vaporize the hydro-
carbon, the vapor is lighted and a flame
45 therefore issues from the hood 15. The
operator now uses the cylindrical tank 4
as a handle and by its aid may direct a
flame against objects to be burned. Even
when the objects are located overhead, the
50 operator has no difficulty in applying the
flame to them, because when the tank 4 is
used as a handle and its end nearest the
hood 15 is raised to a considerable angle
upward, the fuel within the compartment
55 21 is readily forced through the pipe as
above described. The burner as a whole
may therefore be inclined either down-
wardly or upwardly as desired.
The device is of special service in burn-
60 ing off the thorns and needles growing upon
various plants of the cactus kind and may
be easily manipulated so that the burner
flame is thrown against portions of the
plant which are otherwise not readily ac-
It will be noted that when the hydro-
carbon fuel is fed into the heating coil 16
it first reaches the coolest portion of the
coil. As the liquid follows the interior of
the heating coil, it comes into contact with 70
successively hotter and hotter and hotter
portions of the coil. The liquid is thus
vaporized and by the time it gets entirely
through the coil it is completely formed
into vapor. Except for the provision of 75
feeding the hydrocarbon fuel into the cool-
est part of the coil and gradually con-
ducting it into successively hotter portions,
it is possible that violent ebullition might
take place owing to the sudden conversion 80
of the hydrocarbon fuel into vapor. By
our arrangement, the vapor thus formed
can produce no sudden or excessive back
pressure and no violent ebullition can be
so produced as to endanger the safety of 85
We do not. limit ourselves to the exact
construction shown, as variations may be
made in the form of our invention with-
out departing from the spirit thereof. 90
Having thus described our invention, we
claim as new and desire to secure by Let-
A pear burner comprising a taiik having
a substantially tubular form and adapted 95
to hold a hydrocarbon liquid, a valve cas-
ing containing valve mechanism and ex-
tending radially into said tank, a pump
barrel extending axially into said tank, an
angle block mounted upon said valve cas- 100
ing and connected with said pump barrel
for the purpose of supporting the latter
within said tank, said angle block having
a. passage extending through it for the pur-
pose of establishing communication be- 105
tween said valve casing and said pump.
barrel, a partition disposed across said cas-
ing and provided with a bottom- so as to
form a compartment for holding a quan-
tity of liquid hydrocarbon, a. pipe extend- 110
ing into said casing and into said compart-
ment, and a burner carried by said pipe.
JOHN J. MESSERLI.
JESSE L. MAYFIELD.
Witnesses as to the signature of John J.
S. T. HOWARD,
R. E. TnoirAs.
Witnesses.as to the signature of Jesse L.
W. A. WAKEFIELD,
Copies of this patent may be obtained for five cents each, by addressing the " Commissioner of Patents,
Washington, D. C."
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Messerli, John J. & Mayfield, Jesse L. Pear-Burner, patent, September 30, 1913; [Washington D.C.]. (texashistory.unt.edu/ark:/67531/metapth853567/m1/3/: accessed January 18, 2019), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; crediting UNT Libraries Government Documents Department.