вход по аккаунту


Патент USA US2406228

код для вставки
~Aug. 20,1946.
mmimn ccmnoz. MEANS
Original Filed Sept. 4, 1942_
2_Sheets-She'et II.v
7 ‘04m J. ‘Cay-m
Aug. 20,1946.
- 2,406,228
"‘BURNER common MEANS ,
‘v Original‘ Filed Sept‘ 4, 1942
’ F [G7 2
Patented Aug. 20, 1946
, 2,406,228
Walter S. Landon, Detroit, Mich, assignor to De
troit Lubricator Company, Detroit, Mich, a
corporation of ‘Michigan
Original application September 4, 1942, Serial No.
457,310, now Patent No. 2,389,519, dated Novem
ber 20, 1945. Divided and this application Jan
uary 8, 1944, Serial No. 517,499.
8 Claims.
-’I'his invention relates to new and useful im
provements in heating apparatus and more par
ticularly to means for controlling the operation
of a burner for the same.
(Cl. .137—21)
‘ An object is to provide-novel means for deter
mining the range of automatic operation and the
maximum and minimum ?ow limits of the fuel
supplying valve for the heating apparatus.
Another object is to provide means to stop pos—
itively the movement of the control valve toward
closed position at its minimum ?ow position.
Another object is to provide means by which
the valve can have closing movement beyond its
minimum ?ow position.
The invention consists in the improved con
struction and combination of parts and their
aggroupment in operative relation to, be more
fully described hereinafter and the ‘novelty of
which will be particularly pointed out anddis
combustion chamber 5, there is a continuous
vertical partition or ballle I0 dividing the space
within the casing II of the heating apparatus
into 'a return air in?ow passageway I2 for “re
ceiving air from the heated space and an up?ow
discharge passageway I3 for the heated air which
discharges through the grill 3 into the space to
be heated. The baffle I0 terminates above the
base of the heating apparatus so that the pas
10 sageway I2 is in communication at its lower end
with the lower end of the up?ow passageway l3.
- The liquid fuel is fed through the pipe or' con
duit ‘I from a constant liquid level control device
I4 which is supplied with fuel from ‘a supply tank
15' not shown through an inlet supply pipe I5 which
is connected into an inletistrainer chamber I6 in
the base of the device I4. The outlet from the
strainer ‘I ‘I and chamber I6 opens into a passage
tinctly claimed. In the accompanying drawings
way |8 which opens upward through a valve seat
member I9 into the constant level chamber or
to be taken as a part of this speci?cation, there
is fully and clearly illustrated a preferred em
the seat member I9 there is a ?oat operated in
bodiment of the invention, in which drawings:
let-controlling and shut-off needle valve 2| _for
regulating the in?ow of oil to the reservoir 20.
' Figure l is a schematic view of the heating ap
reservoir 28 of the device I4.
Cooperable with
paratus having the novel control means and 25 The valve 2|‘ is secured to a ?oat operated lever
arm 22 fulcrumed for normal operation on a pin
showing the control means in the side elevation
23 and carrying a ?oat member 24 adjustable
but with parts broken away and ‘in vertical sec
tion substantially on the line I‘-| of Fig. 2;
relative to the arm 22 by means of a screw 25 en
gageable with the bimetal ?oat supporting mem
Fig. 2 is a top plan view of the control mea
30 ber 26. The arm 22 is provided with bearing
with the top cover member removed;
slots 21 cooperable with the pin 23 so that in the
Fig. 3 is a view of the control means in vertical
event of failure of the valve 2|‘ to maintain a
central section on the line 3-3 of Fig.‘ 2;
j Fig. 4 is a detail view showing certain of the
constant liquid level such that the liquid level
safety mechanism and taken on the line 4—4 of
increases, the arm 22 can fulcrum on the con
Fig. 3;
35 nectirrg pin 28 between the arm 22 and valve
member 2|, thereby to permit the ?oat member
Fig. 5 is a detail exploded view of parts of the
24 to move upward due to the lost motion permit
valve positioning mechanism;
ted at the slots 21. Upward movement‘ of the
Fig. 6 is a detail view in section on the line 6----6 ‘
of Fig. 3 showing the cooperation of the meter
?oat 24 in response to excess or undesired in
ing valve and its operating lever,v and
40 crease in liquid level will cause the lever arm
extension 29 to engage the trip arm 30 of the
Fig. '7 is a detail view of certain lmob support
safety trip mechanism 3| and move the dog or
mg means.
pawl 32 out of underlying relation to the latch
Referring to the drawings by characters of ref
plate 33 on the safety trip lever 34 so that the
erence, I designates generally a heating appara
tus such as a ?oor furnace supported by a base 45 force of the spring 35 is released to move the
lever 34 sharply downward into engagement with
ment ?oor or the like 2 and discharging the heat
ed air upward through a grill 3 set in the floor 4.
the upper end of the valve member 2 I, thereby to
The heating apparatus has a combustion cham
force it to closed position against its seat. The
safety trip'lever 34 has an end portion 36 which»
ber 5 with a pot-type oil burner 6 which may be
a gravity fed hydroxylation burner supplied with 50 extends out of the casing 31 of the device I4 so
fuel oil through a supply pipe ‘I and with com
that the trip mechanism can be reset by lifting
upward on the lever end 36. The trip arm 30 also
bustion air through an air inlet 8, either natural
draft or pressure fed, by a fan or the like. The
has an end portion 38 which extends out of the
casing 31 so that the lever 34 can be manually‘
combustion chamber 5 has an outlet duct 9 to
the usual stack or ‘chimney. Surrounding the
tripped or released. A more complete descrip
ding application of Russel, Serial No. 327,689,
d April 3,1940.’
. .
which underlies the trip arm 30 so that upon
counterclockwise rotation of] the lever ‘H by
downward thrust of the rod 69, thearm 13 will
lift the'trip arm 39 andlrelea‘se the lever 34 to’
7 E‘ ting on the top of thevside walls of and con-'
forming: to: the casing’ 3?, there isv av housing
‘ _ member.
lever 34 by a bearing pin 12. The other end of
thelever ‘H has a'laterally projecting arm 73
er” this mechanism ‘will be found in the 00+
having a top coverv member 40 and
close the ?oat operated valve member 2!. "
a horizontal supporting member such as ‘a plate
' cast integral with the housing 39 and extending)‘ 7' f _1 The lower end portion of the metering valve
‘stem 65 islof reduced diameter, asat ‘M, for a
across one end portion of the housing 39in over
lying relation to the trip mechanism> 3i‘. Se;
cured to the underside of the supportingmember: -
sliding ?t in an annular ?ange 15 within a valve
seat member 'l?which is press-?tted in the out
let conduitr'l'i leading fronr the reservoir 20.
M by screws or the ‘like 42,>there;is a temperature ~
responsive power element 63 having a casing 411”
‘Theiconduit ‘H has an internally screw-thread
“ ed ?ttingg'iil projecting from the bottom wall of
closed and sealed’ by an expansible, collapsible
wall 45, such as a metal bellows KO.‘ provideian'exe j‘ .theicasing 3T and into which the end of the fuel 7
‘ l
pansion chamber 46 communicating With ,a‘bulb. _' .conduith'lv issecured as by screw-threaded en
gagement. Communicating with the conduit 11
or feeler element '41 through a capillary‘tube48;
The power element is charged under a vacuum ‘i and extending upward from the ?tting '78 there
is a vent‘passage ‘F9 for relieving the conduit 1
with a suitable volatile liquid-such an anilineoil.
The ‘bulb element 13'! is inserted through the
of any fuel entrained air or gas. The lower end I
portion of the stem tit-has an internal longitu
' heating apparatuspasing l 1- into the upflow pas
sageWay'B-so that the pressure in the expansion
chamber’ 4G*varies" in ‘accordance with the tem
peraturej'of- the heated air discharging’ to the .
space tobe'heatedv Therbellows header endwall 25
él?jhas-an upward extending thrust member 5!]
dinal/bore $38 which rextendgupwardtoia- point ‘
above maximum liquidrrleveljini-the reservoir’ 20 '
so as to vent the passageway or conduit 7 of any‘
fuel, entrainedair or gas.‘ I’ The reduced stem end
portion. if! is provided with a.‘ metering slot 8|
from which a- spring‘abutment post; ?irextends ' which is tapered at its upper end for pilot flow,
the slot cooperating-with the ?ange "F5 to meter
concentrically upward. ,Straddling‘the‘post 5| is
flowfrom the reservoir 25!. to the burner 5'. ~ ‘Above,
the (bifurcated end portion52-eof an operating le
ver; 53,» which is journaledon- a-bearing pin’ 5:3 30 the'reduced portion ‘it, the‘ stem has a-_conical
which is engageable- with the upper
supportedwin oppositely disposed.- brackets 55 on
the top- face-of thesupporting plate 4!; The post
end of the valve seat member l’?'toclose off10r
5lrhas foppo-sitely positioned downward directed
stop the?ow of‘iuel from the reservoir Zil-to the '
conduit ll.
Loosely fitting on the stem 56 above -
knife edge-members 56* which seat in end ‘recess
in’; the bifurcated end portion 5''! ofaleai spring
the conical portion 82 there, is a sleeve or tubular
member 58'? which straddles . the ' post > 5 I .7
member'83 which is urged-upward by a helical V
coilspring 85$ seating at .its lowerjend" on the
bottom wall of the casingf?- and. surrounding
overlying relationito the lever 53' and terminates
the: seat member T6. 1 The upper end or face; of
adjacent-ethe-‘opposite'end of’ the" housing- 39 in
an adjustment screwrrengaging portion 59» coop; 40, the sleeveii3 is engageablejwith a-pinoral‘m '85
spring member-58 extends longitudinally andin
erable‘with an adjustment screw Bil-bearing
extending» radially outward from the stem, 6'6- so
downward against the spring 58 and tensioning
it-over aV‘br-idge »member '6 I‘ which supports‘ the
springs 58ri-ntermediaterits lends; ,Thelever '53 has
- that thevspringp 8% acting upward throughthe
sleeve 83~against ther-pin' 85' acts- to move-the
' valve ‘M toward open position, see Fig; l.’ ,Posi
tione'd laterally of the stem ES-andatdiametri
a- down-turned spring-abutment» arm’ 62.
callyopposite points there are a glow ?readjust
tionedwbetweenéthe'earm 62 eandrran abutment
member'GB secured tothe housing'39, there is a
ment screw 86 and arhigh ?re adjustment ‘screw » '
rebent leaf; type toggle spring 64 -so'- positioned
8‘! which are adjusta-bly- screwithreaded ' into
relative -to~*the: lever T53 that its ’ component > of
supporting bosses‘, 88, 89~respectively extending
force OPpOSi-ngTOtatiOn of lever 53 will decrease ,
upward from thebottom wall of the casing 31.
Slidable onlthe screw 85 there is
low ?re stop member 99 in the form of a' sleeve
having a lateral ?ange 9i~at~its.lower" end, the
members? beingisupported on a stiff helical coil
at-such aerate "that the‘force whichrwill initiate
movement of» the lever ‘53 V will; cause movement
» of-,~the'lever- 53 through vits complete: range of
travel; *Extending-irom the lever 53 adjacent
and on the'power element side of the bridge
member 6|, which limits upward movement of‘the
lever~53 by the spring-64', there is a valve opera
ating arm: 55 'apertured' for passage of a meter
ing valvestemw?iiltherethrough and having'op;
posite downturned bearing portionsfor engaging
the top‘face of a collar 61 vslidable on the stem
66. This metering valve operating mechanism'is
more fully described inlmy‘copending-application
SerialNo. ‘381,835 ?led March 5, 1941 for-Control
a spring 92 which'surrounds the screw 85 andrseats.
on the boss 88. Cooperable with-the member 98
‘ there is an arm 53 which eXtends radially and >
horizontally from the sleeve 83 and is notched or’
apertured at its end toslidably fit the member 90
to hold the sleeve {iii-against rotation and to en
gage the top facerofthe ?ange iii to limit down
ward movement of the sleeve 83 and of the stem
“when pin 35 is in engagement with the-sleeve
top rface,~as in Fig. l.v Supported on the sleeve
65 member 90 and a stiff helical spring 94 sur
rounding the high ?re adjustment screw 81 there
Securedv in-an' aperture in arm 65, there is an
is avcam track means 95,.see Fig. 5. The cam
internally threaded sleeve or nut 68 through
track member 96 has an apertured ear 91 re-’v
which there» is adjustably screw-threaded an op-»
erating rod '69' for actuating the safety trip
ceived ‘by-the screw 86 and seating on the sleeve
mechanism; a=lock nut 10 being provided to hold 70 93; Overlying the ear 9‘!- and the low ?re end
the rod 69 in‘ adjusted position. The rod‘ or
portion‘ 98 of the member 96 there-is a resilient
thrust“ member 69 extends downward into; the
casing 31-» and terminates in overlyingrelation;
seerFigeé, to one endportion of a release lever.
track member $33’ having an aperture arm I00
which ?ts‘ over, the screw 86. The member 99
inverted 'U -shaped and section to‘ hold it
‘Ltcarried by’ andjournaled onthe'valve closing 75 laterally in~registry withthe end portion}!!! and
has a downward inclined side edge IOI leading
from the portion 98 as a flexible track extension.
Also received by the screw 86 is the apertured '
tion the ?ange 9| such that, with the arm 93 in
engagement therewith, the desired minimum‘fuel
?ow for pilot operation of the burner 6 will be
end portion I92 of a cam seating member I03
maintained. This simultaneously adjusts‘ the
having a horizontal step I04 cooperable with the
position of the main cam track low end 98 and
valve stem pin 85 to seat and hold the conical
its auxiliary track member IOI so that when the
valve portion 82 in engagement with the ‘seat
cam follower member 85 is rotated to minimum
member 16. The other end of the cam seating
?ow position, it will be riding on the top face of
member I03 is apertured, as at I05, to receive the
the sleeve member 83. It may be noted that the
screw 81 and to be held in engagement withthe 10 auxiliary track member IOI provides a ?exible
top face of the boss 89 by the overlying spring 94.
resilient end portion for the main track mem
The high ?re end of the cam track 96 has an
ber 96, thereby to accommodate manufacturing
apertured ear I06 which receives the screw 81
tolerances in the spacing between the low cam
and seats on the top face of the stiff spring 94.
end 93 and the top face of sleeve member 83.
Secured on the screws 86 and 81, there are sleeve 15 The high ?re adjustment screw‘ 9'! is set to posi
abutment members Ill'l, I08 ‘respectively which
tion the high end of the main track member 96
‘ hold the cam track means 95 down against the
at the maximum permissible fuel ?ow to the
springs 92 and 94- The ‘cam track means 95
burner 6. The thrust member 69 is adjusted rel
closely surrounds the stem 66 so that the pin 85'
ative to the force of spring I I2 so that the lower
bears upwardly against the under face of the 20 end of the thrust member 69 will actuate the re
track member 91:‘ or the step I04 of the member
lease lever "II upon predetermined temperature
I03 or the resilient track edge IOI. The top edge
increase above the temperature at which the arm
of the sleeve 83 has a recess or notch I09 posi
93 will have been movedinto engagement with
tioned beneath the step I84 and has a downward
the ?ange SI and which is the limit temperature
inclined cam edge H0 leading from beneath the 25 at which the burner must be shut down. Assum
?exible track edge IOI so that upon rotation of
ing that the burner is operating at pilot ?re and
the stem 65, the pin 85 will move down along y
the hand grip member II9 has been rotated to
the track member 96 and from the track edge MI
position the follower member 85 radially, as
and into the recess I09 under the resilient down
shown in Fig. 1, then, upon a call for heat, the
ward force of the member I03, the arm 93 and
thermostatic power element 43 will move the
?ange 9i preventing further downward move
lever 53 upward with a quick action, thereby per
ment of the sleeve 83.
mitting the spring 84 to move the valve stem 66
Above the cam means 95, the stem 66 has an
upward until the follower member 35 engages the
annular upward facing shoulder III on which
main track member 96, as shown in Fig. 1. Any
is seated the lower end of a helical coil compres
35 desired fuel ?ow to the burner can be obtained
sion spring H2 which surrounds and acts at its
within the minimum and maximum limits set
upper end against the collar 6'! to hold the col
by the low ?re screw 86 and the high ?re screw
lar against a downward facing annular shoulder
37 respectively by merely rotating the stem 66
II3 on the stem 66. Preferably the collar 61 is
to regulate the‘ lift of the follower member 85
reciprocal on a stem extension II4 ?tted into a 40 before its engagement with the cam track means.
When the temperature is reached at which the
stem end bore and pinned therein, as at II5, so
that the parts can be assembled. The stem 66
power element 43 is set to operate by the prior
extends upward through an aperture H6 in a
adjustment of screw 60, the lever will be moved
horizontal shelf or supporting plate member II'I
downward with a quick action, compressing the
preferably cast integral with the housing mem 45 spring 84 and moving the arm 93 into engage
ber 39 and thence through a registering aperture
H9 in the cover member 40. Journaled in the
aperture H5 there is a tubular hand adjustment
member or knob US which extends upward
through the cover aperture H8 and is longitudi
nally slotted upwardly, as at I20, at a plurality
of points from its lower end. Each of the down
ward extending knob ?ngers is of reduced width
at its lower end portion to pass through aligned
ment with limit ?ange 9!.
This downward
movement of the lever 53 will not compress the
spring II2 since it exerts a greater resistance
than the spring 84. If the temperature increase
which resulted in downward movement of the
lever 53 was caused by an obstruction to out?ow
of the heated air through the grill 3 from pas
sageway I3, as for instance by the positioning
of a rug over the grill 3, then the temperature
arcuate slots in clamping washers I2I, I22 which . surrounding the bulb element 41 will increase
engage the top and bottom faces respectively of
and when the temperature has risen to the pre
the shelf II 1. The ?nger shoulders engage the
determined safe limit as determined by the ad
top face of the washer I2I so that the lower ends
justment of the thrust member 69, then the fur
therexpansion of power element 43 will have
of the knob ?ngers turned or bent outward, as
at I23, lock and hold the knob I I9 longitudinally 60 compressed the spring I I2 su?iciently so that re
?xed for rotation in the shelf aperture II 6, see
lease lever ‘II will have moved the trip arm 30
Fig. '7. The stem extension II4 extends upward
upwardly, thereby releasing the lever 34 for clos
through the washers I2I, I22 and has, at its up
ing of the inlet valve 2| under the force of spring;
per end. a disc I 24 with arcuate slots through
35. Fuel flow to the burner 6 will now continue‘
which the knob ?ngers slidably ?t so that rota 65 at a decreasing rate until the fuel in the cham
tion of the knob II9 acts through the disc I24 to
ber 20 is consumed. This small quantity of fuel
rotate the stem 66, thereby to‘ reciprocate the
which is burning at a decreasing rate will not
stem as the pin 85 is moved along the cam means.
cause an increase in temperature within the
The disc I24 is carried by a pin I25 which ?ts in
furnace I and will result in a safe operation,
a longitudinal bore 0r socket in the upper end
which would not be the case if the power element
of the stem extension I I4 and is held against ro-t
43 had acted to fully close the metering valve ‘I4,
tation relative to the extension I I4 by a cross pin
for the reason that opening of the metering
I 26 which ?ts in a stem end slot I21.
valve after such a safety operation by the power ,
The operation of the apparatus is as follows:
element 43 would result ingfuel flow to the burn
The low ?re adjustment screw 86 is set to posi 75 er 6 which might still be so» hot that an explosion
2, 40652281
gageable by said sleeve member to’ limit clos—'
ing-movement of said valve member, said‘sleeve
would occur.' After the power element 43 has
tripped the safety mechanism 3| and has cooled
member having a recess for receiving said
?nger, means to rotate said stem to position said
?nger in registry with said recess so that saidv
valve member can move further toward closed
to a‘ position calling for heat, such as shown in
Fig. 3, then the trip mechanism can be manu
ally. reset tolthe position of Fig. '3 by lifting up
wardon the lever extension‘ 35 sufficiently to po
sition the latch plate 33 above the pawl 32. If
it is desired to shut down the burner 6, the hand
position, and means operable upon registry of
said ?nger with said recess to urge said valve
grip member H9 is rotated to move the follower
member 85 off the end of the main track mem 10
ber 86 and into underlying relation to the step
i013, which is possible by reason‘ of the sleeve
member recess use which permits the stem 66 to
move downward beyond the limitjset by ?ange
member to
‘l’. A control valve comprising a valve mem
ber having a stem, a sleeve rotatably and re
. ciprooably ?tting said stem, a spring’ urging said
sleeve longitudinally of said stem, a pin pro-.
jlecting from said stem and engageable by said ‘
9i, the ‘resilience of the ‘track member H33 acting 15 sleeve to hold said spring under compression,
_means engageable by said pin to limit opening ;
to hold the conical valve :portion 82 tightly
- against its seat .on the member 16.
movement of ,said valve member, an arm hold-v '
ing said sleeve against rotation, vmeans engage
It maybe noted that if it is desired to pro
able, with said arm to limit closing movement
vide "a control device in which the metering
valve is modulated in accordance with the tem 20 of said valve member, said sleeve having an end
recess to receive saidpin, and means to rotate
perature of the power element 63, that this may
saidstem for movement of said, pin into said
be accomplished by changing the angle at which
recess so that said valve member can move be
the spring 64 acts on the lever 53, so that the
yond said limit of closing movement.
sum of the power element resisting component
5. A control valve comprising a valve member
of force of the spring 64. and the force of the 25
having a stem, a sleeve rotatably and reciprocably
spring 58 does not decrease upon movement of
?tting said stem, a spring urging said sleeve longi
the lever 53 by the power element 43, as is well
tudinally of Said stem, a pin projecting from said
known to those skilled in the art.
stem and engageable by said sleeve to hold said
This application is a division of my copend
ing application Serial No. 547,310, ?led Sep
tember '4, 1942, now Patent No. ‘2,389,519,
granted Nov. 20, 1945, for Burner control means.
What is claimed and is desired .to be secured
by Letters Patent of the United States is:
1. A control valve comprising a valve member
having a stem, a sleeve rotatably and recipro
cably ?tting said stem, a spring urging said
sleeve longitudinally of said stem, a pin apro
jecting from said stem and engageable by said
sleeve to hold said spring under compression,
. means engageable by said pin to limit opening
movement of said valve member, means engage
30 spring under compression, a cam track member
engageable by said pin to limit opening move
ment of said valve member, a post supporting the
low end of said track member, an abutment on
said post, an arm extending from said sleeve
and reciprocably engaging said post to hold said
sleeve against rotation, said abutment being en-~
by said arm to limit closing movement of
said‘ valve member, said sleeve having an end‘
recess to receive said pin, means to rotate said
stem for movement of said pin into said recess
so that said valve member can move beyond said
limit of closing movement, and means to move
saidpin into said recess.
able with said sleeve to limit closing movement
6. A control valve comprising a valve member
of said valve member, said sleeve having an end
recess to receive said pin, and'means' to rotate 45 having a stem, a sleeve rotatably and reciprocably
?tting said stem, means cooperable with said,
said stem for movement of said pin into said
stem andoperable to actuate said valve member,
recess ‘50 that said valve member can move be
a'spring urging said sleeve longitudinally of ‘said
yond said limit of closing movement.
stem, a pin projecting from said stem and en
2. Acontrol valve comprising a casing having
a valve port, a valve member cooperable with 50 gageable by said sleeve to hold said spring under
compression, means engageable by said pin to
said port and having av stem, a sleeve member
limit opening movement of said valve member,
rotatably and reciprocably'receiving said stem,
means engageable with said sleeve to limit clos
a cam- track member, a ?nger extending from
ing movement of said valve member, said sleeve
said stem and positioned between said sleeve
member and said track member, a spring acting 55 having an end recess t0 receive said pin, and
means to rotate said stem. for movement of said
on said sleeve member and holding said sleeve
pin into said recess so that said valve member
member against said ?nger and said ?nger
can move beyond said limit of closing movement.
against said track member, means engageable
7. A control valve comprising a casing having
by said sleeve member to limit closing move
ment of said valve member, said sleeve mem 60 a valve port, a cover on said casing and havingv
an aperture alined with said port, a metering
ber having a recess for receiving said ?nger,
valve member guided in said ‘port and having
and‘ means to rotate said stem to position said
a stem extending through said aperture, a sleeve
?nger in registry with said recess so that said
member reciprocably and rotatably receiving said
valve member can move further toward closed
65 stem, a ?nger projecting from said stem, means
limiting movement of said sleeve member toward
3.’. A control valve comprising a casing having
said port, a spring urging said sleeve member
a valve 'port, a valve member’cooperable with
away from said port and against said ?nger, cam
said port and having a stem, a sleeve member
rotatably and reciprocably receiving said stem,
means cocperable with said ?nger to reciprocate
a camtrack member, a ?nger‘ extending from 70 said valve member, said sleeve-member having a
recess to receive said ?nger upon rotation of said '
said stem and positioned between said sleeve
stem, a hand grip member'extending through
member and said track member, a spring act
cover aperture, means supporting said grip
ing on said sleeve member and holding said .
sleeve‘ member against said ?nger and said
?nger against said. track member, means, en
member for rotation and against reciprocation
longitudinally of. said’ stem, means to transmit
rotation of said hand grip member to said stem,
said stem being reciprocable relative to said hand
grip member, and means to disengage said ?nger
screw and by said main track member, said
auxiliary member extending along and be
neath the low end of said main track member
and leading to said step, a pin projecting from
from said cam means and to move said valve
member toward said port against the force of said UV. said stem and engageable with the underfaces of
8. A control valve comprising a casing having
an outlet port, a longitudinally slidable and ro
said track members, a sleeve member on said
stem, an arm extending from said sleeve member
and having a notched end in slidable guided en
gagement with said sleeve, said arm being engage
tatable metering valve cooperable with and con;
trolling flow through said port, a stem on said 10 able with said limit ?ange to stop movement of
said valve toward closed position, a coil spring
valve, a minimum ?ow adjusting screw, _a maxi
surrounding said stem and urging said sleeve
mum ?ow adjusting screw, said screws being posi
_member against said pin and holding said pin
tioned at opposite sides of and parallel to said
against one of said track members, said sleeve
stem, a sleeve on said minimum ?ow, screw and
member having a top edge recess to receive said
having a minimum limit ?ange, a coil spring on
pin for movement of said valve toward port clos-v
said minimum ?ow screw and supporting said
ing position beyond the limit of said limit ?ange,
sleeve, a coil spring on said maximum ?ow screw,
means to rotate said stem to adjust the position ,
a main cam track member apertured to receive
of said pin along said track members, and means‘
said screws and seating on said sleeve and said
second-named coil spring, a resilient shut o?f 20 to slide said pin longitudinally away from said
track'members thereby to move said valve toward
cam track member apertured to receive said
port closing position.
screws and having a shut o?‘ step at the low
end of said main track member, an auxiliary
track member carried by said minimum ?ow
Без категории
Размер файла
987 Кб
Пожаловаться на содержимое документа