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Патент USA US2410006

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ocf., z9,71946.
or;gina1'Fi1ed Aug'. 3, 1940 ‘
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Patented Oct. 29, 1946
Compton, Calif., assignors to The National'Sup
ply Company, Pittsburgh, Pa., a corporation ofl
Original application August 3, 1940, Serial No.
350,196. Divided and this application March 6,
1943, Serial N0. 478,256
5 Claims.
(Cl. 158--27.4)
This invention relates to flame hardening ap
paratus and more particularly to the torches
thereof and to the ‘provision of means for avoid
ing „the overheating of the same.
This application is a division of our copending
application, vSerial No` 350,l‘96,„ñled August 3,
1940, for Flame hardening method and appara
tus„r_1ow Patent No, 2,321,645, granted June
15, 1943.
It> is an object Aof `this invention to provide
a flame hardeningv or heating apparatus where
in `«means Vare provided to prevent the accidental
over-heating of the apparatus by preventing
„flow of combustible heating gas until circulation
flame over the surface of the work 3. The ori
ñces 5 are fed combustible gas through a plu
rality of parallel lateral feed passages Vlì which
extend from .a main feeder passage 1 which ex
tends longitudinally through the torch. The
passage l at the `end of the torch is connected
with a conduit .8 through which a suitablecom
bustible gas mixture is supplied from any .suit
able source. Each` of the flame orifices 5 is
formed on the face of the torch I with a counter.
bore 5a.
Between the flame `orifices 5 in the `loody‘of l_theV
torch I there are provided. a multiplicity ofïair
ports 9 which extend through the body ofthe
of a cooling medium Vis established.
Another object `of this invention is to provide
a flame heating or hardening apparatus includ
dance of air for completing the combustion of
ing a 4_torch or torches through which a com
the gases.
torch and through which air passes from the back
of -the torch to the face to `maintainan abun
bustible mixture of> gases is dispersed and
Formed-through the torch I is a cooling passageV
through Vwhich. means are provided for main 20 AIll which is connected lby means of a transverse
taining a lcirculation of a cooling ñuid and where
passage VI I,»and a second longitudinally extending
means are provided responsive to the pressure of
the cooling'fluid for admitting combustible gases
towthe torch or torches.
`Other objects .and advantages of this inven
tion >it is believed will 'be apparent from the fol
lowing detailed description of a preferred em
bodiment thereof as illustrated in the accom
panying drawing. ,
In _the drawing:
.Figure 1 is a sectional elevation of one of the
torches embodied in our invention.
Figure 2 is a sectional end View taken sub
cooling passage I2, the end of which communi
Cates` With-the transverse passage I3 which is in
communication with the discharge passage I4.
25 The cooling passage I0 ,is connected in communi
cation with the inlet pipe I-5 while the discharge
passage I4 is connected in communication with
a discharge `pipe ‘l-G. The passages thus provide
for `the distribution `and circulation of a cooling
30 fluid or coolant `such as water through the torch.
Means are provided for permitting the admis
sion of combustible gas to Vthe torches when the
. pressureof the „coolant attains La desired pressure.
stantiallyonthe line .2è-2 of Figure 1 illustrat
This provision acts _as a `safety device .to prevent
ing `two such torches in position with relation 35 inadvertent _overheating of the torches I and 2.
to an element to |be flame hardened or heated.
Figure 3 is a diagrammatic elevation partly in
vertical section of the flame heating apparatus
The particular form of means illustrated in
the drawing for accomplishing this result is: The
gas which may have been suitably mixed with
embodied in our invention.
air or oxygen passes through a meter I'I and from
Figure 4 is a sectional view of the combustible 40 the meter Il passes through a conduit I8 in which
gas control valve utilized in our invention illus
there is mounted a valve I9. After passing the
trating the valve in closed position.
valve [9, the gas passes into a flow governor indi
Figure 5 is a sectional View of the valve in
cated at 20 4from which the gas passes >through
open position.
a conduit 2| to a suitable mixing valve not shown
In the preferred embodiment of our invention 45 and from which mixing valve the gas passes to
illustrated in the accompanying drawing, I and
the conduit 8.
2 indicate torches which are utilized for direct
The valve I9 is of the sliding sleeve type and
ing a name against the surface of an element
includes a sleeve 22 which slides along the pipe
3 which is to be flame hardened or heated. The
section 23. Positioned in the pipe section 23 is
two torches are alike except being formed as
a dam or blind 24 which obstructs the flow of
right- and left-handed so that the construction
of only one such torch need be described.
The torch I has a broad flat side 4 in which
there is formed a large number of orifices or
annular recess 29.
burner openings 5 for the distribution of the
sleeve 22 a shifter 22a for shifting the sleeve 22
fluid through the pipe. On opposite sides of the
dam 24 are ports 25 and 26. 'I‘he sleeve 22 has
spaced packing 21 and 28 on opposite sides of an
There is also secured to the '
. .
along the pipe 23. As illustrated in Figure 4, the
lectively admitting combustible gas to said pas
sageway, means for actuating the valve to open
position, a second passageway formed in the
sleeve is moved to the closed position to obstruct
flow of the combustible gas. In Figure 5 the
v sleeve is moved to the position where flow of gas
torch, means to pass a coolant through the sec
ond' passageway, and means automatically re
is permitted around the dam 24 through the ports
sponsive to the` pressure of the Ícöol'ant adapted
to hold the valve actuating means frómoperation
of the valve to open position, said automatic
25 and 'in a`_rècëss '29 and portsV` 25 `back> into the
pipe 23;-4 `Means are VVprovided for `maintaining
the valve sleeve 22 in the closed position when
the pressure of coolant or cooling medium does: , , means being operatively ineffective to- move said
not meet the desired level to prevent the- torches 10 valve when the valve is in open position.
l and 2 from overheating. The means as herein
illustrated for accomplishingv this object are a
3. In a device for ñame hardening, the combi
nation of a torch having‘a first passageway for
diaphragm housing 33 injwhichfa »ilexible'dia
combustible gas >and a second passageway for a
coolant, means including a valve for selectively
admitting combustible gas to said first passage
way, means for actuating the valve, a conduit
water supply pipe 33 leading to the intake pipe I5.
for delivering a coolant under pressure to said
Secured to the diaphragm ‘3| is' an operating
second passageway, and means responsive to the
rod 3d on the end of which there is secured an
pressure in said conduit adapted to hold the valve
abutment or interference lug 35 adapted to move
into and out of position to prevent the movement 20 actuating means from actuation of the valve to
ward open position until the pressure in the con
oiy the valve sleeve 22 tothe open position. When
phragm 3! is mounted. II‘h'e housing 33 is con
nected through a pipe 32 with the coolant or
pressure is exerted against the diaphragm 3|, the
duit reaches a predetermined'va1ue;
interference lug 35 is moved o-ut of the path of
4. In a device for flame treating Ya metallic sur-f
`face, the combination of a torch having'a'plu'
the ,sleeve 22' permitting the'valve to be opened.
When insufficient pressure-is exerted against the
diaplfiragm- 3l, the interference lug 35 prevents
`openingQoff- the" valve i9; >thereby preventing the
" ï
rality of burner openings adapted to lie` adjacent
a surface to be heated, a passageway for com
bustible gas formed in the torch Vand communi
eating. with the burner openings, means includ
ing a valve for selectively admitting combustible
lin‘ej'ßßj is'v too `low> tojmaintainadequate cooling 30 gas to said passageway, means for actuating the
Valve,` coolingl means adapted to `prevent'over
öf’l't'hei't'orches" lY and‘f2; the interference lug 35
heating ofthe torch'includingïa second passage
will not beïmoved out ofv position.
way formed in the torch,` meansltoJ pass a coolant
f_l >,I-Iaving’fiully vdescribed our invention and a
through the second passageway, and means a'uto
speciñcA embodimentrthereof, it is to be under
_stood " that f‘our invention is fnot limited to the 35 matically responsive tothe pressure of the coolant
adapted to hold the valve actuating 'means from
precise details‘of construction herein' set forth,
operation ofthe valve to open position, said auto
but is of the full- scopeof the lappended claims.
'ñowfo?combustible gas to torches l and 2. If for
any -reason the waterpressure’and water supply
We claim:
1‘. In a device of thel class described,-the com
matic means 'being operatively ineffective to move
said valve when the valve is Ain open position. ’ '
bination of> a, torch having a ñrst passageway for 40 ` 5; In a device for name treatingfa metalliclsur
face, the 'combination of a torch’having a plu
combustible gas 4and a second passageway for the
rality of 'burner openings, a passageway forl coin
circulation of a coolant, means including a valve
bustible gas formed> in the torchV and communi-for selectively admitting combustible gas to said
cating with the' burner opemngs', meansinclud
first passageway, means for actuating the valve
ing a valve for selectivelyY admittingcombustible
to open position, a conduit for delivering a cool
gas to said passageway, means foractuating the
ant under pressure to said second passageway,
and means including a diaphragm >actuated by
valve, cooling "means adapted tol'prevent over
heating of the torch including a second passage
pressure in `said conduit adapted to hold the valve
way formed in 'the torch, a conduit` for delivering
actuating-¿means from operation of the Avalve
toward open position until Vthe pressure in said 50 ñuid under pressure to the second passageway;
and means responsive to the pressure in said con
conduit reaches a predetermined value.
duit 'adapted to hold the valve actuating means
‘ Q2. In a device of the class described, the com
from actuation of the valve toward open position:
bination o_f a torch 'having a plurality of burner
openings, 'a' combustible gas 'passageway formed
. JAMES o. Bisi-ical, :I
within`the torch and communicating with the 55
burner openings, means including a valve for se
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