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Патент USA US2133395

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Oct. 18, 1938.
E~ H, MUELLER
2,133,395
lVALVE FOR PILOT LIGHT DEVICES
Filed Nov. l1, 1935
21
ATTORNEYS
Patented Oct. 1_8, 1938
UNITED STATES PATENT OFFICE
2,133,395
VALVE FOR PILOT LIGHT DEVICES
Ervin H. Mueller, Grosse Pointe Park, Mich.
Application November 11, 1935, Serial No. 49,203
1 Claim. (Cl. 251-43)
dotted lines in Fig. l to permit gas to ñow from
the manifold pipe 5 through the air mixer 6 and
This invention relates to a gas lighter for ig
niting gas at the burner or burners of gas burn
ing devices and more particularly to a pilot light
for igniting the gas at the burners of a gas stove.
on to the burner, the gas under pressure will be
projected through one of the pipes 3 into the
chamber 2 and there be ignited, thus flashing
back through the pipe and igniting the gas issu
ing from that burner.
The device embodying the present invention
An object of the present invention is to pro
vide a device for maintaining a pilot'light which
device is so constructed as to facilitate the ad
justment and cleaning of the same and also >to
insure against leakage of gas. A further object
10 is to provide a construction wherein the needle
valve of the device is provided with a packing
gland and an adjusting nut, the arrangement
being such that an interposed spring holds the
packing ñrmly seated and also resists the turning
of the nut to prevent loss of adjustment.
A further object is to provide a construction
adapted to facilitate cleaning and repair and also
Ul
and as shown in Fig. 2, comprises a head 'I or
valve body which is formed at its lower end with
a tubular projection 8, the bore of which pro
jection is extended into the body and formed with
a tapering inner end to provide a packing gland
or seat for packing material 9 and the inner end
of this bore is extended as at I0 to receive the
end of a needle valve stem II the outer end of
which stem is rigidly secured to an adjusting
nut I2 sleeved over the tubular projection 8 which
is screwthreaded to engage the internal screw
thread of the nut. A coiled spring I3 is sleeved
upon the needle valve stem or outer end portion
thereof between the packing 9 and the outer
end wall of the nut I2 and thus by turning the
nut upon the tubular projection 8, this spring is
depressed or put under tension and forces the
packing 9 to firmly seat around the needle valve
stem and against the end of the bore of said pro
to provide for the replacement of the pilot light
tube, the arrangement being such that the tube
may be readily detached and replaced by one of a
different length if so desired. It is also an object
to provide a particular construction and arrange
ment of elements whereby certain advantages in
construction, adjustment and operation are se
' cured, and to provide certain other new and use
ful features in the construction and arrange
ment of parts, all as hereinafter more fully de
jection. This spring therefore not only holds
scribed, reference being had to the accompanying
drawing in which
30
the packing to its seat to» provide a tight packing
gland but also puts a frictional resistance upon '
Figure 1 is a diagrammatic plan view of a gas
stove;
‘
the nut I2 to prevent its accidental turning.
'
Fig. 2 is a vertical sectional detail of a pilot
light device;
Fig. 3 is a view similar to that of Fig. 2 show
D: Ul ing a modified construction;
Fig. 4 is a transverse section upon the line 4--l4
of Fig. 2, and
Fig. 5 is a section through an indicator head or
combustion chamber of the gas stove and show
40 ing a pilot device in side elevation and in opera
tive position relative to said head.
'
In the drawing Fig. 1 shows an outline plan
view of a gas stove with the burners I indicated
in position and a central spreader device located
45 centrally between the burners and comprising an
ignition chamber 2 and tubes 3 leading therefrom
to each of the several burners. Located directly
below the head or chamber 2 of the spreader, is
the pilot light device embodying the present in
50 vention, with the pilot light tube of the device
extending upwardly through the bottom of the
chamber 2 so that a small gas flame will be
maintained within this chamber at all times and
when the gas is turned on to one of the burners
55 by means of one of the valves indicated at 4 in
The inner end of the bore I0 of the head l is
formed with a jet opening vI4 and the tapered
end I5 or valve proper of the needle valve is
adapted to project into this jet opening I4 and
therefore by turning the nut I2 and valve stem
the valve I5 is caused to enter the jet opening
to seat therein or to be partially retracted there
from to regulate the size of the jet opening and
the amount of gas which will be permitted to flow
therethrough, this gas being conducted to the
head through a small tube I6, entering the bore
I0 through a passage I1 connecting the open end
of the tube with said bore.
The jet opening I4 opens into» the bore I8 of
an externally screwthreaded nipple or tubular
projection I9 formed integral with the body -I and
projecting upwardly therefrom and an internally
screwthreaded sleeve 28 is screwed over this nip
ple I9 and is formed with a tubular extension or
pilot light tube 2I adapted to extend upwardly
and into the spreader chamber 2 as indicated in
Fig. 5. Between the end of the nipple I9 and an
internal shoulder at the end of the bore of the
sleeve 20, is placed a coiled spring 22, this spring 55
2
2,133,895
thus exerting a force to frictionally resist the
turning of the sleeve 20 upon the nipple I9. 'I‘he
nipple I9 is bored transversely to form air inlet
openings 23 and like openings are formed in the
Ul sleeve 20 to register with these air inlet openings
so that by turning the sleeve upon the nipple, the
amount of opening provided through these air in
let openings 23 may be regulated and when so
turned, this adjustment is held by the action of
the spring 22.
A slightly modiñed construction of the device
shown in Fig. 2, is shown in Fig. 3 in that the
tubular projection or nipple 8a is formed at the
side of the head or body 'I instead of at the lower
end thereof as in Fig. 2, and therefore the adjust
ing nut I2 and needle valve II extend with their
axes in a horizontal position and in coincidence
with the axis of the supply tube I6a, so that the
tapered end I5 of the needle valve will project
into a small bore I 'Ia providing communication
between the chamber of the head and the supply
tube I6a, this small opening being adapted to be
closed by the needle valve or the iiow there
through regulated by an adjustment of said valve
and nut I2. The tapered or pointed end of the
valve thus extends in the axis of the tube Ißa
and directly in line with the ñow of gas through
said tube thus aiîording a sure shutoff and regu
lation of the flow. A nipple I9a is externally
screwthreaded at its lower end to screw tightly
provided with a jet opening I5a at its axis to per
into the bore Illa of the head and has an end wall
mit the gas under pressure from the chamber Ißa
to pass therethrough into the bore I8a of said
nipple.
Y
The sleeve 20a which corresponds to the sleeve
20 of Fig. 2 instead of being form-ed with an
integral pilot light tube, is formed with a de
tachable tube Zla, said tube being formed at
40 its lower end with an external peripheral rib
24a to engage an internal shoulder formed at theY
upper end of the bore of the sleeve 20a and
the coiled spring 22a is interposed between the
end of the nipple I9a and the inner end of said
tube to hold the tube ñrmly seated, this spring
also frictionally resisting the turning of the
sleeve 20a upon said nipple I9a and thus serving
to hold said sleeve in the position to which it is
adjusted to adjust the air inlet openings 23a,
these openings> being adjusted to properly pro
portion the air to the amount of gas passing
through the jet I5a.
By the arrangement of parts shown in Fig. 3,
the pilot light tube 2 Ia may be quickly and easily
detached to give access to the jet opening and
also for the purpose off changing this tube where
it is desirable to have a tube of greater length,
as when it is desired that this tube shall project
further into the spreader chamber 2; and by
arranging the needle valve with its axis coincid
ing with the axis of the supply tube I6a, said
valve is positioned in directly opposed relation
tothe gas iiow through said tube, and the needle
valve is then regulated by the nut I2 which is
positioned at the side of the head rather than
at its lower end and is therefore more accessible
for the purpose of adjustment.
Other changes may be made in the particular
arrangement of parts without departing from the
spirit of the invention and such changes are
contemplated.
Having thus fully described my invention what
I claim is:
A valvular device for controlling the admixture
of gas and air and the fiow thereof to a central
chamber of a pilot light device for gas stoves,
which valvular device comprises, a valve body 25
provided with a chamber and a jet opening lead
ing from said chamber and with a projecting and
externally screwthreaded nipple, a needle valve
to control the flow of gases through said jet open
ing and having a plain stem extending into said 30
chamber of said body and projecting therefrom,
an adjusting nut in screwthreaded and sealing
engagement with the projecting and externally
screwthreaded nipple on said body and which
nut is rigidly secured to the outer end of said
valve stem, said projecting and externally screw
threaded nipple on said body being formed with
a longitudinal bore through which said stem ex
tends, a packing within the inner end of said
bore of said nipple around said stem, a coiled 40
spring sleeved upon said stem between said nut
and said packing and adapted to be put under
compression by the turning ofY said nut in ad
justing said needle valve stem, whereby said
spring is effective in holding said nut in the 45
position to which it is turned to adjust said valve
stem longitudinally and to hold said packing
forced into the inner end of the bore of said
nipple through which said valve stem. extends,
and a gas supply pipe for supplying gas to said
chamber Within said body.
ERVIN H. MUELLER.
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