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Патент USA US2131903

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Oct; 4, 1938. v
‘G. E. PICKUP
2,131,903
AUTOMATIC LIGHTER SYSTEM FOR VAPOR FUEL STOVES
Filed Nov. 22, 1955
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2,131,903
lighted while the burner system remains in oper
ation. Customarily one of the principal burners
ll may comprise two semicircular segments 29
and 30‘, one disposed on each side of the genera
tor tube I8 and in close proximity to the combus
tion zone established by the auxiliary burner 23.
Through this arrangement the segmental burner
will ignite automatically when fuel vapor is ‘ad
mitted thereto because of the proximity of its
10 combustion zone to that of the auxiliary burner.
I-Ieretofore, however, no practical means has been
proposed for automatically lighting the remain_
ing one or more principal burners of a vaporfuel
stove burner system.
_
15
where a free supply of air is available a puff or
?ash of ?ame F occurs. This ?ame passes up
wardly toward the combustion zone of the burner,
' thereby causing the fuel vapor issuing from the
usual burner slots 40 to become ignited.
A fairly critical relationship must be observed
with respect to the spacing between the mouth
of the lighter'duct 32 and the adjacent wall of
the burner ll ‘so’ that the ?ame F will attain
proper results. The importance of this arises 10
from the necessity of an adequate supply of sec
ondary air to produce the ?ame. Accordingly
the proper spacing should be predetermined from
a consideration of the relative proportions of the
The principal aim of the present invention, parts. In the practical embodiment illustrated
therefore, has been to provide a lighter system by herein the lighter ducts are of & inch exterior 16
which any burner may be automatically ignited ‘ diameter tubing and a spacing of from 3% inch
from a continuous ?ame such as that supplied
to % inch between the tube end and the mouth
by the generator burner. Preferably the lighter of the ori?ce 39 has been found satisfactory.
20 system may take the form of mechanism by which
A‘proper axial relation of the mouth of the
any principal burner may be ignited by the sole duct 32,t0 the’ ori?ce 39 should also be main 20
expedient of opening its valve l2 to admit fuel tained for bestrresults. Herein this end is at
vapor from the manifold. To this end, the in
tained by providing a laterally projecting trough
vention contemplates the provision of vapor con
ducting means, herein shown as comprising a
plurality of tubes 32 providing ducts for con
veying fuel vapor from any one of the remotely
disposed principal burners ll past the segmental
burner to the combustion zone of the generator
,burner, where the fuel vapor, will be ignited
and cause a ?ash-back ?ame extending to the
combustion zone of the principal burner to light
the same.
In the present embodiment, separate ducts 32
‘are shown as extending from the burners to
ward a common position adjacent the generator
burner 23 and with their ends opening toward
the combustion zone of the latter burner. Means
may be provided for ?xedly supporting the ad
‘ jacent ends of the lighter ducts 32 as a unit. For
this purpose the auxiliary burner is of improved
construction and may be equipped with a flange
33 forming an extension of voneside of the body
of the burner, and adapted to receive one leg 34
of an angle bracket 35, a bolt 37 maintaining the
angle bracket ?rmly in position.
An outstand
ing leg 38 on the bracket provides a shelf upon
which the adjacent ends of the lighter ducts are
supported. If desired, the ducts may be per
manently and rigidly secured to the bracket leg
38 by brazing or a similar expedient. Through
this arrangement, all of the lighter ducts are
maintained permanently in position but may be
quickly removed as a unit by loosening the bolt 31.
The fuel vapor in a stove of the present type
55
is ‘maintained at low pressure and when in a
relatively cool condition is heavier than air. It
is necessary therefore, to provide means for de
livering the heavy fuel vapor from the burner
60 to be lighted to the lighter duct leading thereto.
To this end, therefore, the side wall of each re
mote burner l l is provided with an ori?ce 39 pref~
erably near the upper wall or combustion zone
of the burner. The mouth of the adjacent lighter
65 duct 32 is disposed in substantially coaxial,
spaced relation to the ori?ce so that fuel vvapor
forced from the ori?ce by the slight pressure
under which it is admitted to the burner will pass
into the duct. The fuel vapor is then conveyed
70 through the duct to the combustion zone of the
lighted burner and promptly becomes ignited
throughout the length of the tube. Combustion
within the lighter duct may be relatively slug
gish due to the lack of air, but as soon as the
76; combustion reaches back to the mouth of the duct
shaped lug 4| on the wall of the burner under
lying the ori?ce.
The end of the lighter duct 25
may then rest upon the outer end of the lug in
its trough-depression.
As will be observed, the
radius of the trough is greater than that of the
duct, and space is thus provided on each side of
the duct for a draft of air to the ?ame F. The 30
trough, moreover aids in the passage of fuel
vapor from the ori?ce to the lighter duct, and
perhaps aids somewhat in causing the flame to
pass upwardly into the combustion zone of the
burner.
35
The ?ash~back flame F occurs with a slight
explosive force and in order to prevent entrance
of the ?ame into the principal burner, suitable
means is provided across the ori?ce 39. In the
present instance, this means comprises a ?tting 40
42 threadedly engaging in the ori?ce 39 and
carrying a transverse screen 43. This screen per
mits free discharge of fuel vapor when igniting
the burner but acts to de?ect the ?ame and pre
vent its entrance to the burner, substantially as 45
indicated in Fig. 4. Once the principal burner
has been lighted, practically all of the fuel vapor
will pass upwardly into the combustion zone of the
burner and what little may continue to pass lat
erally through the lighting ori?ce 39 will be con 50
sumed by an insigni?cant ?ame at the outside
face of the screen.
From the foregoing, it will be apparent that the
present invention provides a novel lighter system
by which any one or more principal burners of a 55
vapor fuel stove may be automatically ignited by
merely admitting vapor fuel to the burner. The
construction and relationship of parts, moreover
18 of a very simple, inexpensive and e?icient char~
ac er.
'
60
I claim as my invention:
1. In combination in a lighter system for a
vapor fuel stove including a burner structure em
bodying a manifold and means for delivering fuel
vapor to said manifold, a hollow valve-controlled 65
principal burner and an auxiliary burner'con
tinuously lighted while the stove is in use both
communicating with said manifold, said principal
burner having an upper burner surface and being
arranged for up-draft combustion, an ori?ce in 70
the side of said principal burner below said burner
surface, said'ori?ce being of substantial diameter
to permit the discharge from saidprincipal burn
er of ,a considerable volume of heavy fuel vapor
after the burner has been turned on and before 75
2,131,903
3i
any appreciable quantity has escaped through said
combustion zone of said generator burner and its
other end spaced a predetermined short distance
substantially spaced relation to said ori?ce and from the mouth of said ori?ce in substantial align
ment therewith to receive fuel vapor ?owing out
its other end communicating with the combus
tion zone of said auxiliary burner for conveying wardly and downwardly therefrom, and means
to said combustion zone fuel vapor passing from below said ori?ce and the adjacent end of said
said principal burner through said ori?ce whereby tube for conducting the heavy fuel vapor through
the space between the ori?ce and said adjacent
to effect ignition of said vapor, and means for pre
venting entrance to the interior of the principal tube end so that the fuel vapor will travel to said
burner of the ?ame resulting as an incident to combustion zone and become ignited throughout
said tube, said means being constructed to permit
ignition of said fuel vapor.
unobstructed communication thereabove between
2. In combination in an automatic lighter sys
tem for a vapor fuel stove embodying a manifold said space and said burner top and being so re
and a generator for delivering fuel vapor to said lated to said adjacent end of said tube that air
manifold, a ?rst burner disposed relative to said may ?ow freely along the sides of said tube to
generator for continuously heating the same, a ward said space to insure an adequate supply of
hollow-body burner remotely disposed relative to air for an explosive ?ash of lighting ?ame in said
space upwardly toward said burner top as an in
said ?rst burner,.and having an upwardly dis
posed combustion face, an ori?ce in the side of cident to said ignition throughout said tube.
4.'In combination in a vapor fuel stove of the
said hollow-body burner below said combustion
face, a vapor tube leading substantially axially , character described, a ?rst burner to be ignited
initially in placing the stove in operation, a hollow
from said ori?ce and terminating in close proxim
ity to said ?rst burner, and an upwardly opening valve-controlled second burner having a perfor
trough shaped lug on said hollow-body burner ated burner top in a higher plane than the ?rst
below said‘ori?ce for receivingpand maintaining burner, a lighter tube having one end within the
said vapor conducting tube in operative position combustion zone of the ?rst burner and slanting
relative to said ori?ce and serving to conduct upwardly toward the second burner, the side
fuel vapor from said ori?ce into said tube and to wall of the second burner having an ori?ce therein
direct upwardly toward said combustion face the through which heavy fuel vapor may escape be
?ame created by ignition of fuel vapor in said fore reaching said burner top when the‘ burner
is turned on for starting, and means for support
tube.
3. In a fuel vapor stove embodying a generator, ing the upper end of said tube in predetermined
a generator burner, a manifold for receiving heavy spaced relation to and in alignment with the
low pressure fuel vapor from said generator, and mouth of said ori?ce to receive fuel vapor there
a chambered principal burner communicating from to convey the vapor to said combustion zone
with said manifold and having a perforated burner ‘for ignition to produce a ?ash-back ?ame for ig
top and an ori?ce in one side through which niting the second burner, said predetermined
heavy fuel vapor initially entering said burner spaced relation being from ?ve-sixteenths to
three-eighths of an inch where the tube is of sub
may ?ow before reaching said top; the combina
tion of means for automatically lighting said stantially seven-sixteenths exterior diameter
tubing.
'
principal burner from said generator burner in
GEORGE E. PICKUP.
cluding a tube having one end mounted within the
burner surface, a lighter duct having one end in
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