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Патент USA US2404015

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July 16, 1946.
. 2,404,015
B. WALKER
LIQUID FUEL BURNER
Filed Jan. 16, '1942
5: .
2 Sheets-Shéet 1
h
1NVB? é
July 16, 1946. ‘
5 WALKER
LIQUID FUEL-‘BURNER
‘Filed Jan. 16, 1942
2,404,015
_
2 Sheets-Sheet 2
[52
INVENTOR.
2,404,015
Patented July 16, 1946
UNITED STATES PATENT ‘OFFICE,’
2,404,015
LIQUID FUEL BURNER
Brooks Walker, Piedmont, Calif.
Application January 16, 1942, Serial No. 426,993
6 Claims.
(01. 158-81) ’
1
This invention pertains to small, collapsible
camp stoves for use by campers, cross-country
skiers, mobile troops, and others requiring heat
for cooking, as well as possibly heating a small
tent. Heretofore such stoves, as used by ex
to seven inches in diameter and four to five inches
high.
The invention is illustrated by way of exam
ple in the accompanying drawings, in which:
Figure 1 is aside elevation, partly cutaway,
showing one form of the invention.
Figure 2 is a side elevation, sectional view
have a large number of loose parts which must
through an alternate type of valve construction
be packed in a separate can or container, involv
which might be used in connection with Figure 1.
ing the possibility of losing some of the parts,
thus rendering the stove useless. A further ob l0 Figure 3 is a top, plan elevation of the stove
illustrated in Figure 1.
ject of this invention is to provide a stove‘of
Figure 4 is a side elevation of an alternate type
minimum size that can be folded into a small
of stove construction.
space with the legs forming a substantial pro
Figure 5 is a perspective view, partly cutaway,
tection to the various parts when in the folded
position. A further object of this invention is 15 of the stove, embodying another form of the
invention.
.
to provide means whereby a single valve fed by
Figure 6 is a plan view of the stove shown in
a wick from the fuel tank, passing through the
plorers, have been made in foreign countries and
Figure 5, collapsed into its carrying position and
air body above the fuel, will admit a combina-,
nested within a cooking pot.
>
tion of fuel and air during the starting opera;
tion prior to heating the generator to a point 20 Figure 7 is a plan view of still another type of
stove embodying the invention.
where the fuel is vaporized, as this is necessary
Figure 8 is a side elevation view, partly cut
in temperatures around thirty below zero wherev
gasoline will not readily light in an open pan such ‘
as a priming cup, and alcohol is normally re
quired with the complication of having to pro» 25
vide two kinds of fuel. A further object of this
invention is to provide a starting tube whereby
an auxiliary tube when placed in the starting
position intercepts the fuel-air spray and blows
it directly on the generator where, during the 30
starting operation, a hot ?ame impinges directf
1y on the generator, heating the generator to op
erating temperature in twenty seconds to a min
away, of the stove as shown in Figure 7.
‘Figure 9 is a transverse sectional view of the
modi?cation shown in Figure 5, with the stove
in starting position.
'
In all ?gures, like numerals of reference refer
to corresponding parts in the various ?gures.
In Figures 1, 2, and 3 I have shownv a fuel tank
l0 carrying a supply of fuel H and provided with
a ?lter cap 12 preferably of the conventional
type such as Coleman uses on their gas lamp
with an air ‘vent which can relieve the pressure
without danger of blowing up the tank. A pump
ute, depending upon conditions, thus speeding
the operation materially over starting without: 35 I3 is provided with a pump handle I30. of the
conventional type with an outlet l3b preferably
such a tube_and waiting for heat to be trans
above the fuel level so that any leakage through
mitted through the burner cup to the generator.
the pump will not leak fuel into the pump. This
Another object of the invention is to provide a
pump is of the conventional type with a cup
construction whereby a vertical jet over a fuel
tank can be controlled by a vertical valve with, 40 leather plunger, check valve, and preferably a
screw-threaded shut-off valve in addition, simi
lar to that used in the Coleman type gasoline
lamps. A bushing i9 is secured by brazing, silver
tion whereby a short cylindrical tank can be '
soldering, swedging, or other suitable means to
used with a burner intake coming out of the side
of the tank, fed with a wick, so that the stove! :45 the tank and the valve 20 is threaded into the
bushing l9. Within the upper end of the valve
may be turned with the burner up for starting
20 is threaded the burner jet element 29 and is
where the wick will pass through the air above
adapted to receive valve 20. The valve 20 is sup
the fuel during the starting operation, and when
plied with fuel through wick 2| held in place by
laid down on its side inthe running position, the
wick will be completely submerged mostof the, wire-22 which also helps insert the wick when the
valve is inserted into place.
‘
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:
time, thus conserving air pressure. A further
Between the wick 2| and the control valve 23
object is to provide a stove in which maximum
is preferably inserted a rolled metal screen 24
fuel capacity is available, while still allowing
which prevents parts of the wick from getting in
the stove to be nested within an ordinary mess
a cleaning wire going through the jet. Another
object of the invention is to provide a construc
cooking pot such as troops carry, usually six. (55 to the valve seat and preventing tight closing.
2,404,015
3
A let cleaner wire 25 is suitably held in a holder
26 adjustably secured to cleaner block 28 by being
swedged into same or by screw threads and lock
nut 21. A cleaner cam actuator 30 of the type
used on Coleman gas lamps is provided with a
conventional type of stu?ing box. Control valve
23 is operated by valve handle 23a and it has a
4
nut 13 and is preferably provided with threads on
the outside for the mounting of the burner cup
which may be screwed down to a position against
the gland nut 13 for packing in a minimum of
space, and screwed up against auxiliary jam nut
15 when ready to operate as a stove.
In Figure 4 I have shown an alternate type of
conventional stuffing box secured by nut 23b.
construction wherein a slightly different shaped
A burner cup 35. of the Primus type is provided
_ tank 80 is used with the usual ?lter cap l2, air
with spider‘36 on which the fuel spray impinges 10; pump {[3, and legs 50, similar to those shown in
for a suitable spreading and burning in the
connection with Figures 1 and 3. However, here
burner cup 35.
The burner cup is secured to .a
sleeve 31 which is secured by threads to the out
side of the valve housing 2|]. On the lower end of '
. I have shown a vertical type valve, preferably
with a cleaner wire located on the end of the
valve “stem and projecting through ‘the ori?ce.
sleeve 31 is provided a shoulder and nut for se-. 15 The Wick ‘2| extends through the vertical tube 8|,
curing bracket ‘38 for supporting a starting tube
39 which is pivoted to the ‘bracket at M]. I‘ This
through the elbow, and through the horizontal
- ‘ex-tension 82a of the valve housing 82.
A cup 83
starting tube can assume the dotted line position
is preferably secured to the gland nut On the
shown in Figure 1 for starting, when the fuel will
stuffing 'box and the valve handle 9% which is
be de?ected through‘ the tube and burn against 20 located directly above the fuel tank. This cup
the threaded portion of the valve housing around
.1 83' catches any fuel ‘which-may?'dr‘ip from the
the cleaner wire control to heat it to a tempera
ture at which the gasoline will be vaporized, at
which time the operator can ?ipthe' tube 39 into
the positon shown in full ‘lines in Figure 1 Where
its top edge will ‘strike the edge of the‘ hole
through the burner cup to keep it from coming
clear out.
’
"
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‘ The three legs 50 are suitably secured to the
fuel tank by bearings 5|‘ which allow the. legs to?"
swivel. On the lower edge of the legs Sil'are.
‘circles 59a covered by thin metal'?t‘lb to give foot
"starting tube. 39l‘du‘ring the‘starting operation,
and keeps the fuel'ol‘f of the valve handle and the
fuel valve. It alsoprote'cts the valve handle‘ 99
from radiated'h'eat.‘
' I '
'
i
-
Figure‘ 5- shows an alternate construction in
which 'a- cylindrical ‘tank 90- is provided with ‘an
air-pump l3 atone end and a ?lter cap at the
other end, and with afue'l valve housing 92 se
cured to the side of the ‘tank and fed by a wick
2|; The burner cup 35 is preferably provided
with a starting tube 39 and‘a‘ valve handle 93
which is above the level of the supporting sur
face.‘ Tubes 94 and 95 are suitably attached to
cooked. Th‘elupper ends of the legs 50 are looped' .35. either end‘ of the‘fuel tank,'though these could
and support two tie-wires 52 on each leg. The ~
be replaced: by clips formed" from or attached to
ends of the ‘tie-wires are looped through the
the end of the fuel tank rather than tubes. A
loops‘in the legs 59-30 that they cannot be lost.
short bracket rod 96 extends upwardly through
The other ends of the tie—wi'res ‘hook into holes
said tube 94, forming a loop at the top, through
throu‘gh‘the lip of the burner cup 35 and'makeri 40 which is pivoted rod 97, then‘ out horizontally
the structure relatively rigid, particularly if the
with adepression to receive rod ‘98, down verti
burner ‘cup is screwed fairly tightly on the upper
cally and back horizontally to a loop around the
end of the valve housing 28. When it is desired
lower end of the vertical portion of the rod 95.
to carry the stove; the tie-wires 52 are all dis
The rod ‘98 and the corresponding rod or brace
connected from the burner cup 35 and folded;
wire 99 complete the supporting structure, the
down next to the legs 50. The legs Snare-then
other end of ‘rod ‘93 being connected to the rod
swung around so that the feet 50a and ‘50b nest
91, which has its free end inserted in the upper
under the center of the fuel ~_tank,'each touching
end of tube 95, and the other end of brace wire
the other about the center. This-leaves‘the up
819 ‘being inserted inlthe lower end of tube 95 to
per end of the legs 59 nested against the burnerv 50 form a rigid structure suitable for holding heavy
cup to protect. same’ and allows the packing of
cooking pots. The lower'run of the rod 96 car
ing in mud or snow and to make ‘the stove‘stable
‘ when supporting a heavy load of material being
- the ‘stove in a minimum of space.‘
ries a foot 96', which supports the stove on snow
In Figure 2 I have shown an alternate form
or soft ground.‘ A guard I08, preferably secured
of valve construction in which a valve housing 6!)
to the jam nut 92a on the valve housing, pro
is provided with a screw-threaded valve stem ‘6|, 55 tects the tank against excessive heat transmis
suitably packed by conventional packing gland
t2, and operated by a non-heat-transmitting
handle 61a. The cleaning wire 66 in this in
- stance is secured in a holder 65, the lower end
sion, particularly by radiation andpreferably has
a depression IEH formed therein to catch fuel
which may drip during the starting operation.
Brackets I03 are ‘attached to the bottom of the
of which is provided with a shoulder 61 which is 60 'fuel tank- 90 to'form supports therefor and to pre
yieldably urged into a wire-retracted position by
vent the heat‘from the fuel tank from melting
spring 68. The lower end 69 of the wirelholder
the snow. Also, supports ‘I93 together with the
is so arranged as to butt against the taper end
tank form a support for starting,‘as shown in Fig
of the valve stem BI 50 that when the valve stem
- ure 9,
which the fuel valve ‘92 is substantially
is screwed into a wide open position, the clean‘ 65 vertical, which allows the wick 2| to pass through
ing wire is retracted out of the fuel ori?ce 70 to
the air chamber to pick up air during the starting
‘a position directly below the ori?ce where there
operation to give the necessary‘ atomization for
is a taper hole for guiding the wire back into the
instant starting in cold weather.
1
ori?ce. ; When the fuel valve .?l is in its closed
‘Figure. 6 shows the same stove ‘in its folded po
position, ‘the cleaning wire is forced into its‘ 70
cleaning position, passing through the fuel ori?ce.
Where it is desirable to use a, heat-resistant,
non-corrosive type of metal such‘ as stainless‘ steel
or Nicrome for the generator 12; it may be suit
sition.
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‘In. Figures "7v and'8 I have ‘shown an alternate
construction in which a substantially round fuel
=tank'l‘20 is provided with air pump [21, a ?lter
plug 122; burner‘ cup 35; a fuel valve control 6m,
ably ‘secured to the valve housing 60 by a'gland-v 75 -.astarting tube’ '39, ‘and a fuel valve; body and
2,404,015
5
valve construction 60 similar to that shown in
Figure 2. A wire pot-holder I25 is suitably piv
oted or secured to the tank at I26‘ and I2‘! so
that it can assume a position about the perim
eter of the tank when stored, or vertically when
carrying, or as shown when cooking, and may
be suitably supported by rods I30 and l3l which
6
2. A burneroperated on vaporized liquid fuel
having a burner cup, a generator, a fuel jet, and
a starting tube forming a hollow passage from a
point adjacent the jet to a point adjacent the
generator so a flame may be directed against said
generator during the starting operation, said
starting tube being adapted to be moved out of
engagement with the fuel from said fuel jet, and
said generator being directly below and forming
may either go to the supporting surface or back
to the rim of the fuel tank. T0 collapse the pot
holder, the rods I30 and BI are disengaged from 10 a straight passage to said fuel jet.
3. A burner for vaporized fuel, having a gener
the tank and the ring-forming member is swung
ator, a wick for supplying said generator with a
around its connection to over-lie the tank. A
liquid fuel, a tank for said fuel, and manual means
guard plate I33 is preferably inserted between the
for supplying said tank with air pressure above
burner cup 35 and the fuel tank to protect the
atmospheric pressure from outside said tank, said
same from getting too hot. A wick 2| feeds
burner having a starting position in which the
fuel to this valve housing 60 and the stove is
preferably started by placing it with the valve
wick passes through the air containing portion
up so that the wick passes through the air-pres
sure chamber to pick up air for starting and then
when the stove is set down in the operating po
sition, the valve takes fuel only and no air after
liquid fuel.
the generator is up to temperature.
of the tank and a position for sustained opera
tion with the wick completely immersed in said
, 4. A burner for operating on liquid fuel having
a wick, a fuel tank, manual means for adding out
'
side air pressure above atmospheric pressure to
While I have discussed this invention primarily
said tank, and a valve between said wick and
in connection with a folding camp or troop stove,
I wish it to be understood that the construction 25 said burner, said tank having means adapted to
support it in either of two positions, one for start
of a valve fed by a wick passing through the
ing where said wick will provide passage to said
pressure air chamber above the fuel to pick up
burner for liquid fuel under pressure mixed with
air and fuel during the starting operation, as well
air from inside said tank, and an operating po
as the starting tube for picking up the fuel-air
spray from the nozzle and piping it around to 30 sition where said wick provides said burner with
liquid fuel but no air from inside said tank.
impinge on the generator for quick starting, as
5. A vapor fuel burner comprising a tank hav
well as the valve construction, cleaning wire con
struction, and the other details disclosed herein
are equally applicable to gasoline or fuel-oil lamps
of the so-called Coleman type, as well as gaso
line or fuel-oil blowtorches and any other de
ing a straight vertically positioned generator
mounted thereon, the upper end of said gener
~ - ator terminating in a fuel jet and a surrounding
vice where instantaneous starting on a fuel-oil
?ame is desirable.
I also wish to point out that I do not wish to
limit myself to the exact details or modes of
operation set forth in this application and draw
ings, for it will be obvious that wide departure
may be made in the way of details without de
parting from the spirit and scope of my inven
tion, which is as set forth in the following claims.
I claim as my invention:
1. A burner operated on vaporized liquid fuel
burner cup, and a tubular, curved starting ele
ment swingingly mounted to project into the cup
and divert the fuel mixture from the jet to a
point adjacent the generator to heat the gener
ator during starting.
6. A vapor fuel burner comprising a tank hav
ing mounted thereon a generator, a fuel jet and
a burner cup in vertical alignment and immedi
ately adjacent one another, forming a straight
short passage for generating and burning the
vapor, and a tubular, curved starting element
swingingly mounted on the generator and nor
having a burner cup, a generator, a fuel jet, and
a starting element forming a hollow passage from
mally having its upper end adjacent the wall of
generator during the starting operation, said
the generator during starting.
the cup, said element being adapted to project
a point adjacent the jet to a point adjacent the 60 into the cup and divert the fuel mixture from
the jet to a point adjacent the generator to heat
generator so a ?ame may be directed against said
starting element being adapted to be moved out
of engagement with the fuel from said fuel jet,
and said generator being directly below and form 55
ing a straight passage to said fuel jet.
BROOKS WALKER.
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