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Патент USA US2404529

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July 23, 1945‘
Filed May l2,_ 1943
3 Sheets-Sheet l I
0. ll WA TERS
I July 23, 1946;
a Sheéts-Sheetyl s
Filed May 12, 1943
FIG. 7
F I a. ' a .
vD.|/. WATERS I.
Patented July 23, 1946
Lester 0. Reichelt, Cranf0rd, and Daniel Vaughn
Waters, Flemington, N. J ., assignors to Western
Electric Company, Incorporated, New York,
N. Y., a corporation of New York
Application May 12, 1943, Serial No. 486,640
1 Claim. (01. 121‘_46.5)
This invention relates to valves, and ‘more par
ticularly controlling apparatus for ?uid operated
During the operation of certain types of ma
chines, it has been found desirable ofttimes to be
able to apply varied forces to the .material work;
ing parts of the machine and/or to cause their
movement into operative positions at varied
speeds. When the control of such machines lies
in a manually actuable ?uid control apparatus, it
extending to and communicating with the opera
tive and return portions of a cylinder I 5 below
and above a piston [6. Although the apparatus
has been designed to control air Lmder messure
to the cylinder, it would function equally well with
other ?uids such as oil, Water and the like. The
cylinder and :piston are part of a‘schematically
illustrated machine, indicated generally at H,
which includes a die [8 movable with the piston
relative to its companion die 19 which is sup
has been found advantageous to equip the vap
portedby suitable means 20.
paratus ‘with means so that, through it, these
The apparatus In has a housing 22 threadedly
variations may be brought about.
apertured at 23, 24 and 25 for the connection of
An ‘object of the invention is to provide a ?uid
supply line II and the ?uid lines l2 and I4
controlling apparatus which is simple in construc 15 respectively.
By viewing Fig. 5, it will beapparent
tion yet highly e?icient for actuation in control
that the supply line H, or the threaded aperture
ling the operation of a machine.
therefor, leads into a chamber 21, this chamber
With this and other objects in view, the inven
extending lengthwise of the housing as illustrated
tion comprises a ?uid control apparatus having a
in Fig. 2. Communicating with the chamber v2'!
housing with ?uid :chambers therein, in one of 20 are
two control valves 28 and 29 which may be
which a pair of supply valves is disposed, an ex
haust valve being disposed in' the other,‘ and
means to control the supply and exhaust valves
for alternately supplying a ?uid under pressure
to opposite sides of an operating piston, one of.
the supply valves having an associate control to ’
vary the pressure of the ?uid directed to its re
respectively termed operating and return'valves,
as they will control the?ow of the ?uid to move
the die l8 through the action of the piston It‘
respectively into the Ioperating position and the
returnor normal position. These valves are nor
mally urged ‘downwardly into engagement with‘
their seats or apertures 30 and 3| by their respec
tive springs 32 and 33. Threaded caps or covers
Other objects and advantages will be apparent
34 and ‘35 are disposed in threaded apertures of
from’ the following detailed-description whencon 30 the
housing in alignnient'with their respective
sidered in conjunction with the accompanying
valves 28 and 29, to function as abutting supports
drawings, wherein
for their springs and to provide access to the
\Fig. 1 is a side elevational view of the apparatus
shown connected to a machine, the operation of
The ‘valve '28 has a stem 38 projecting down-1
which the apparatus is to control;
through apertures 39 and fit in the hous
Fig. 2 is a top plan view of the apparatus;
ing to a- given position beneath the housing,_ as
Fig. 3 is an end elevational view of the ap
spective side of the piston.
shown in Fig.1 5. Concentric with the valve stem
38 is a 'control element or metering valve 4!,
Fig. 4 ‘is an enlarged vertical sectional view 46 which is cylindrical in general contour for slid
able movement in the aperture 39 and has cir~
taken along the line 4—4 of Fig. 2;
cumferentially spaced V-grooves 42 in its periph- '
Fig. 5 is an enlarged vertical sectional view
taken along the line 5—5 of Fig. 2; ~
ery extending from, the upper, end thereof to
‘ positions at approximately the center of the ele
Fig. 6 is a vertical sectional view of a part "of
the ?uid control means of one of the supply .45 ment, at which positions the grooves vtaper out
paratus. this view being taken along the line 3—3
of Fig. 2;
, valves ;
wardly, .as indicated at 43., to the cylindrical pe
Fig.7 is a top ,plan view of the structure shown
in Fig. 6, and
Fig. 8 is a, graph showing variations in pressure
at opposite sides of the piston through the con
trol of the apparatus.
Referring now to the drawings, attention is ?rst
directed to Fig. 1, which illustrates the apparatus,
indicated generally at 10, connected to a ?uid
supply line H and’ having ?uid lines I 2 and I4 55
riphery of the element at these points. The por
tions of the element between the grooves 42 in
the upper half of theelement are recessed, as ‘at
44, to allow for the free passage of the ?uid under
pressure completely around the ‘element at this
portion. The lower end of the element 4| has a
shoulder .45 to receive the upper end of a spring
46; the lower end of which rests upon a shoulder
.41 of a tubular member 48, the latter being dis-i‘
its engagement with the element 10, is moved
upwardly and with it is moved the spring 46 and
posedin the aperture 49 concentric with the valve
the control element 4|. This movement of the
elements 48 and 4| and the connecting spring
'45 continues to cause the solid lower portion of
stem 38.
At this time attention is directed to a hollow
portion 59 of the housing which is ‘open to the
atmosphere, the aperture 39 communicating with
this open portion. The threadedaperture 24,
to which the ?uid line I2 is connected, communi
cates with the aperture 39 and through it with
the element 4| to substantially close the aper
ture 39 before the valve 28 is opened. When
the element 10 is moved a su?icient distance to
engage the lower ends of the valve stems 38 and
the chamber 21 and the atmosphere at the open ,10’ 59, it is in a position to open the valves 28 and 55
portion 59, depending upon the control of the
against the force of their springs 32 and 51. The
valve 28 and the element 4|.
opening, of the valve 55 provides an exhausting
a of the aperture 39 an annular Also,
: ‘ V
in the housing about the element .4|.' ,7
Attention is now directed to'the valve
means for the upper portion of the cylinder |>5
' '
through the line H, the chamber 53, and into
the atmosphere ‘through the aperture ‘56 opened
as illustrated in Fig. 4, is disposed in the chamef
ber 21 and controls the ?uid under pressure from
the chamber 21 to a chamber 53.
by the valve 55 at the hollow portion 50. How
ever, prior to the opening of the exhaust valve
The chamber
I 55 the valve 29 will be'closed by the aforemen- ‘
tioned action of the treadle and lever.
53 extends longitudinally of the housing 22,, as .
illustrated in Fig. 2, affording communication be
The moment the valve 28 is moved into open
tween the chamber 2'! at the valve 29 and the 20 position, fluid under a given pressure from the
threaded aperture ‘25 to which the fluid‘ line I4
supply line H and in’ the chamber 21 may pass
is connected. In the chamber 53 an exhaust
into the aperture 39 and a portion of this ?uid
valve 55 is disposed, normally'held on its seat or
may be directed‘to the lower portion of thecyl
aperture 56 by a spring 51 positioned in a cap
1-5, that is beneath the piston l6, through
58 threadedly disposed in an" aperture of the 25 inder
the ?uid line l2. The ?uid under pressureenl
housing as illustrated in Fig. 5. The valve 155 is
tering the aperture 39 ‘and,?lling the ?uid line
adapted to open the chamber 53 to the atmos- I
|l2 and the portion of the cylinder beneath‘the.
piston I6, will build upapressure' depending upon
' phere through the open portion 59 ofthe house
ing. ’ A stem 59 for the valve 55 extends down
wardly through ‘the housing to a'position, as
illustrated in Fig. 5; vin a plane with the lower
force of the element 4|. ,_ This force
30 theholdi'ng'
will be applied against therforce of the'spring
end of the valve stem 38., A Valve stem 60 for
the valve v2'9 extends downwardly through. the
housing to a position indicated at 6|, at a'differ
that of the spring, theelement 4| will be moved
downwardly until these'forces are balanced, at
contact with their valve stems is illustrated in‘
Figs. 1, 3 and 5, and includes a‘ lever 63 pivotally
supported'at 64 and actuable through a treadle
parent that the position of the'treadle, and in a
like manner the position of the lever“ 63, gov?
erns the pressure of the ?uid applied to the pis
46 and if the force vof the ?uid is'greater than
which time the grooves 42 in ‘the element 4| may '
ent level from that of the lower ends of the valve 35
extend out of the aperture 39 and allow a por
stems 38 and 59.
of the ?uid to escape; Thus it will be ap- .
The means for actuating the valves through
ton l6. . The pressure at the piston may be in.
creased or varied with increased pressure or var
iation of pressure on the treadle 65. Thus’ a
gradual downward movement of the treadle will '
and hold it in its open position shown
In this position‘ the valves 28 and 55 remain closed 45 cause a gradual increase in, the force of the, spring
and the valve 4| open as illustrated in'Fig. 5. ' 46 ‘through the continued, upwardv movement of
. 65, pivoted at 66, against the force of a spring -
51, the latter normally urgingvthe lever into the
position shown in Fig. 1,,to actuate the valve 29
the member 48, effecting an increase'in the force
To assist‘the lever 63 in operating the valves 28
of the ?uid passing to the cylinder beneath the
and 55, a cross piece orelement 19 has its cen
piston. During this movement of the treadle
tral portion lying ‘upon a rounded end ‘H of the
lever ~63, its ends being provided with, hearing 60 and the member 48, the spring 46 tends to force
the control element‘ 4| upwardly into the aper
. portion 12 for movement on guide rods 13 which,
ture 39, to decrease the size of the outlet por
through the bearings, assure maintenance of the
tions at the ‘grooves '42 'and thus decrease the
element in a true horizontal position at all times
of fluid allowed to escape. , Through
during its movement. The element 10 isdisposed
for engagement with the tubular member 48 and 55 continued movement of thetreadle '65, added
force will be established in the spring 46 until
the valve stems 3B and 59‘.
-' "
.. .
.hisforce is greater than the line or supply pres,
Upon ‘considering the operation of the‘ valve in
sure of the ?uid, at which time the full force of
conjunction with the apparatus |'|, let it be as
the ?uid will be applied to the piston. ‘ It will,
sumed that the valve and apparatus are in the
normal position shown in Fig. 1. In this posi 60 therefore, be apparent that the apparatus may
be moved into closed position under variablepres
tion’ the valve '29 is open and ?uid'under pres-v
sures or under a constantly increasing pressure,
sure is free, to pass from line H through cham
ber 21,.aperture 3| opened by the valve29, cham
ber 53, and ?uid line l4, to the upper portion of the cylinder I5. This fluid pressure causes 65
downward movement of thepiston IE, to move
the die l8 away‘from its companion die l9.
To move the dies into closed position, that ‘is
the die l8 relative to the die ‘19, the treadle or
control element 65 is moved about its'pivot B6,
and‘ as a result lever 63 is'moved about its pivot
64 against the force of the spring 61. During
the movement of the‘lever 63, the valve 29 is re
leased .and allowed-to be closed by its spring 33';
At'the same time the tubular member 48‘, through
such being under thecomplete control "of. the
The action of the piston l?'under thisnforce
may be illustrated‘by the ,‘graph‘shown injFig. "8.
The (left) vertical line ‘represents vpressure in the
cylinder, the lower horizontal line represents the
treadle position'or the positionrofthelever 53
relative ‘to its valve stems andv the upper dotted
line represents line pressure‘orthe 'full‘pressure
of the fluid. from the supply line ,| |. ' ,Thus start:
ing at‘ zero with the treadle in its nermalljposie
tion, theline 'ymarked (LI), lower intake, indie
oates the‘. effect “of a gradual depression of the
treadle the full distance. In other words, after
a short movement'of the treadle the ?uid pres
sure -beneath the piston will gradually increase
over a given period of time, that determined by
the travel of the treadle until the pressure be
neath the piston has increased from zero to the
v full line zero.
The line marked UE, upper exhaust, indicates
the pressure in the cylinder above the piston.
It will, therefore, be apparent, by this line UE, 10
that the upper cylinder end has full line pressure
of the ?uid therein prior to the actuation of the
treadle or during the normal position thereof.
After a given movement of the treadle, as indi-‘
controlled through the speed of ‘ travel of the
treadle or its associated lever. It should be un
derstood, also, that the stopping of the move
ment of the treadle at varied positions will re
sult in the application of varied pressures oper
ating the apparatus. It may not be necessary,
in certain instances, to apply full line pressure to
the piston. In such instances the desired pres
sure may be applied by limiting the position of
the treadle.
Although speci?c improvements of the inven
tion have been shown and described, it will be
understood that they are but illustrative and
that various modi?cations may be made therein
cated by the horizontal portion of this line, the 15 without departing from the scope and spirit of
valve 55 will be opened, the valve 29 being closed,
this invention as de?ned by the appended claim.
allowing escapement of the ?uid from the upper
What is claimed is:
cylinder end into the atmosphere. The time in
A ?uid control apparatus comprising a hous
terval for exhausting the upper cylinder end is
ing having an inlet port and an outlet port with
short, as indicated by the said line UE.
20 a connecting passageway therebetween having an
The lines UI and LE represent the upper intake
outlet end opening to the atmosphere adjacent
and lower exhaust under the control of the valve.
the outlet port, a valve normally closing the pas
The return movement of the piston I6 is more
sageway between the ports and having a stem ex
rapid than its feeding movement, as illustrated
tending through the said outlet end of the pas
by the lower exhaust line LE coupled with the 25 sageway, a supply line for a ?uid under pressure
intake line LI and comparable with the upper
connected to the inlet port, a ?uid line connected
intake UI for the upper cylinder end. In each
to the outlet port, a member movable under varied
instance there is free uninterrupted passage for
forces to engage the stem and open the valve to
the ?uid entering the upper end of the cylinder v open the passageway between the ports, an ele
through the opening of the valve 29 and the ex 30 ment movably disposed in the passageway concen
hausting of the ?uid from lower end of the cyl
tric with the stem and formed to close the out
inder through the closing of the valve 28, effecting
let end of the passageway when in one position
opening of the aperture 0r passageway 39 for the
to cause the ?uid under its full pressure to pass
exhausting of the ?uid into the atmosphere
into the ?uid line and to provide an opening
through the grooves 42 in the element 4|. In
varying in size with variations in the position of
this manner the element 4|, through its grooves,
"the element in the passageway to cause varied
serves as an exhausting means during this por
quantities of the ?uid to escape through the said
tion of the operation of the valve structure and
('exit end and thereby vary the force of the ?uid
serves as a pressure control means during the
in the ?uid line, and resilient means to apply
opening of its valve 28. ,As a result of the valve
varied forces to the element to vary the position
structure, the operating portions of the apparatus
may be returned as rapidly as desired, their move
ment into operating positions, however, being
thereof in the passageway.
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