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Патент USA US3022700

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Feb. 27, 1962
3,022,694
o. H. NUSS
CYCLED JET coouuc MECHANISM
5 Sheets-Sheet 1
Filed Aug. 13, 1958
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INVENTOR
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OSCAR H. NUSS
BY
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ATTORNEY
Feb. 27, 1962
3,022,694
o. H. NUSS
CYCLED JET COOLING MECHANISM
5 Sheets-Sheet 2
Filed Aug. 13, 1958
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INVENTOR
OSCAR H. NUSS
BY
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ATTORNEY
Feb. 27, 1962
o. H. Nussv
CYCLED JET COOLING MECHANISM
Filed Auz- 1a, 1958
3,022,694
'
5 Shee'ts-Sheet 3
A T TORNE Y
Feb. 27, 1962
3,022,694
o. 'H. NUSS
CYCLED JET COOLING MECHANISM ‘
5 Sheets-Sheet 4
Filed Aug. 15, 1958
64
FIG. 9
68
70
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FIG. IO
“M2.
INVENTOH.
OSCAR H. NUSS
“M 2%
ATTORNEY
Feb. 27, 1962
o. H. Nuss
3,022,694
CYCLED JET coouuc MECHANISM
Filed Aug. 13, 1958
5 Sheets-Sheet 5
FIG. ll
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1W
INVENTOR.
OSCAR H. NUSS
my
ATTORNEY
united htates iPatent O
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3,622,694
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.
FIG; 7 is a detailed end elevation of the cycling con
trol valve as seen from line '7—~7 of FIG. 1;
FIG. 8 is an end elevation of the cycling control valve
housing and its actuating mechanism taken on line 8-—8
.
CYCLED JET CQOLENG MECHANISM
Oscar I-I. Nuss, Lancaster, Pa., assignor, by mesne as
signmens, to De Walt, Inc}, a corporation of Delaware
Filed Aug. 13, 1958, Ser. No. 754,824
10 Claims. (Cl. 83-169)
of FIG. 1;
7
FIG. 9 is a partial sectional plan view of the saw
carriage ‘drive, piston shown in conjunction with the
cycling control valve and its actuating mechanism;
This invention relates to producing and cycling a spray »
or mist used or useful as a coolant and/or lubricant, as
' FIG. 10 is a partial end elevation illustrating the ar
for example in material cutting or other working opera 10 rangement of’ the mist generating system taken on line
10—-10 of FIG. 1;
tions.
It has been recognized for some time that the use of
a mist coolant has many advantages over liquid coolant.
It has a higher cooling e?’iciency and, conversely, re‘
quires less coolant handling.
.
7
,
_
FIG. 11 is a side elevation partly in section of a modi- _
fled solenoid controlled cycling valve; and .
7
FIG. 12 is an electrical diagram of the circuit of the
15 solenoid controlled cycling valve.
,
' Referring to FIGS. 1, 2, 3 and'4, there is shown a cut
It is necessary or desirable that the jet of mist coolant
be stopped during a non-cutting portion of a, cycle and
ting machine 26 having a vertical standard 22 supporting
a~_hor'izontal track 24 along which a carriage 26 is slid
ably'mounted. _ Carriage 26 carries a yoke 28 supporting
be immediately restored for the cutting portion. Thus
it is desirable to have a structure and device that will
provide instantaneous stop and start-up of the mist spray. 20 a suitable trunnion 30 of a motor 32 to whose arbor is
secured a cutting blade 34. Also mounted on vthe motor
It has been found in conventional devices on the market
and about the cutting blade is a guard 36 to which is ad
that instantaneous stopping and starting is not possible.
justably attached a rod 38 which may be secured in an
The evices heretofore known, when stopped, give a
stream of mist or liquid that peters down gradually
adjusted position by-the wing nut 40. The lower end
both alternately, rather than a mist._,
46 of the type commonly known by the proprietary name
from full pressure to stop, while on start-up, the ‘devices 25 of the rod 38 carries bracket 42 to which is slidably
mounted by means of the knurled screw 44 a jet atomizer
hertofore known permit blow-by or a blast of liquid or
_
of De Vilbiss'. The atomizer 46 has an air supply con
it is an object of my invention to provide a system and
duit 48 and a liquid supply conduit 50 and a delivery jet
a device whereby a spray can be instantaneously stopped
30 nozzle 52. The air and liquid, both of which are under
and started.
pressure, are mixed in nozzle 52 and delivered as a
It is a further object of my invention to provide a sys
mist. If on cuto? or start-up there is excessive variation
tem in which the jet nozzle for the mist will not leak or
between the gas and the liquid pressure, there will be
siphon when the system is turned oif so that it is im-,
single phase ejection of gas or liquid. Also, if the mix
mediately ready to instantaneously produce a mist upon
35 ing of gas and liquid under pressure occur further back
It is still another object of my invention to provide a . along the line there will be a petering of the jet spray at
start-up.
cutoff and a separation to phase with siphoning or drain
ing of liquid during a shutdown period so that with start~
up, blow-by or an alternate gas and liquid phase will be
pressurized spray system that may be instantaneously cut
off so that the spray is delivered either at substantially
full pressure or not at all.
.
it is an object of my invention to accomplish the above 40 delivered.
' The atomizer 46 may be upwardly or downwardly ad
results by maintaining a constant head of pressure on the
justed by means of sliding the rod 38. It may be ad
liquid source of the mist coolant.
justed inwardly or outwardly toward the work area by
it is a further object of my invention to provide means
for utilizing the system in conjunction with cutting means 45 means of the screw 44 and the bracket 42. Additionally,
it may be adjusted to the left or right of the cutting blade
cyclically operating on a cutting stroke and non-cutting
or the work area by swinging and/ or sliding on securing
stroke as in a cutoff system.
screw 39 in the slot 4-1 of bracket 42. Thus a substan
It is an object of the invention to provide means for
applying mist coolant during the cutting cycle, instantane
ously stopping the delivery of coolant at the completion .50
of the cutting cycle and again instantaneously re-apply
ing it during the recommencement of the cutting cycle.
tially universal adjustment is possible; The direction of
the jet is further adjustable by rotating the jet nozzle 52
upwardly or downwardly about its junction with the gas
and liquid tubes 48, 54} as indicated by the arrows in
FIG. 4. The conduits 47 and 49 may be conveniently
The novel features which I believe to be characteristic
retained in a sheathing 51 passing through a bracket 54
of my invention are set forth with particularity in the
appended claims. My invention, however, both as to 55 in the upper end of the rod 38.
organization and method operation may be understood
by reference to the following description taken in con
nection with the accompanying drawings, in which:
Automatic motive power reciprocates the carriage 26
as may be seen more clearly in FIGS. 1, 2 and 9. Gas
under pressure is supplied from a constant source (not
shown) communicating with the conduit 114 (FIGS. 1, 2.
FIG. 1' is a side elevation of a reciprocating rotary
and 6) which communicates with an arm of T junction
cutter illustrated in conjunction with a coolant mist gen 60 116 through emergency shut-elf valve 118 secured to the
erating system;
FIG. 2 is a partial plan view of the same;
FIG. 3 is an enlarged plan View of the jet nozzle and
its adjustable mounting means;
FIG. 4 is a side elevation of the same taken on line
support 53. Conduit 84 communicating with the valve
"78 is connected to the stem of the T junction 116 while a
conduit 12% communicates with the other arm of the T
junction. The pneumatic cylinder 56 is mounted to the '
65
track 24 by the support 58. The piston rod 60 protrud
4-4 of FIG. 3;
ing from the cylinder 56 is secured to a bracket 62 secured
PEG. 5 is a sectional end elevation of. a nozzle sup
porting bracket taken on line 5~5 of FIG. 4;
_
to the carriage 26. _’l'he piston and carriagemoves to the
left for a cutting stroke and to the right for an idle or
.
.
.
FIG. 6 is a detailed side elevation partly in sectionrof 70 non-cutting stroke.
. This ‘cycling is accomplished by means of- a trip rod
the spray control valve in conjunction with the coolant
64 secured at its one end to the bracket 62 and slidably
reservoir and air distributing chamber;
3,022,694.
3
4
.
mounted at its other end along stop rod 66 by means of
bracket 68. Adjustable stops 7t} and 72 are mounted on
the stop rod 66. The stop rod is connected at its right
pressure which may elfect a'change in its'pre-set adjust
ments. Furthermore, freer opening of valve 112 is pro
vided since valve 112 is not required to operate against
back pressure from the throttling valve 126. If needle
end to a lever 73 secured to a short rock shaft76 mounted
on the housing of a control valve 78. A lever 74 also
secured to rock shaft 76 is connected to the spindle shaft
80 of the spindle valve 82.
throttling valve 126 were located on the other side of
the liquid control valve, the back pressure would slow or
Spindle valve 78'by means
damp seating of the valve and also the equalizing of‘the
of a tongue .85 operates a slide valve 86 over various
pressure drop would produce a small ejection of ?uid
ports in the bell end 38 of pneumatic cylinder 56. As
after valve ‘112 closed. The same thing, of course, ap=
compressed gas from a sourceof constant‘ pressure is de 10 plies to the air throttling needle valve ‘106, but because
livered to valve 78 through the conduit 84 it will pass
around spindle 82 past valve slide 86 through port 98 into '
of the small amount of compressed airiinvolved’and the
velocity at which it travels, the loss of air pressure at the
, pneumatic cylinder 56 behind piston 57 moving piston 57,
intake side of the atomizer is not material and builds up
connecting rod 6%’) and carriage 26 to the left for a work
almost substantially instantaneously when restored at the
cycle. When the bracket 68 of trip rod 64 strikes the 15 start-up'portion of the cycle.
.
'
stop 72, the stop rod 66, lever 73, lever 74, spindle valve
Upon start-up of the work portion, of the cycle, com
82 and slide valve 86. will be moved to the dotted line
pressed air substantially simultaneously ?lls the conduits
position shown in FIG. 9. Compressed gas delivered ' 47, 48 and at the same time operates the liquid control
from the duct 84 will then pass through the conduit 92
valve 112 to apply liquid pressure to the liquid remain
of the valve through the conduit 94 of the cylinder to the 20 ing in conduits 49, 50' of the atomizer. This results in a
opposite side of the piston thereby returning (non-work
substantially immediate supply of a spray jet. When the
ing cycle) the piston to the right hand position until
bracket 68 strikes stop 70 returning through the connected
linkage the lever 74 and valvular parts to the full line posi
tion shown in FIG. 9. 'Mechanisms, not shown are gen
erally provided to damper or control the velocity of piston
valve 78 cuts o? ‘gas under pressure to the conduit 102,
_ the pressure of the liquid and gas of the atomizer is
stopped immediately without further ?ow 0r siphoning of
liquid from the nozzle. The throttling needle v?ves 106
and 126 provide accurate and in?nite (within the capacity
of the system) adjustment means for controlling'both the
.7 57 particularly for the work cutting stroke.
The ports 96 and 98 communicate with the atmosphere. ' . gross velocity of the spray coolant and the liquid to gas
It'will be noted that during the feed stroke to the left, the
ratio, ‘from entirely liquid to entirely gas.
I
.~
gases ahead, of the pistons will be exhausted through the 30
A modi?cation of the inventionris shown in FIGS. 1
conduit 94, port 92 and port 96. When the slide valve
and 12, in which the function of the valve 78 with respect
.86 is in the ‘dotted line position, the gases will be ex
to the conduit102 is replaced’ by a solenoid operated
haustedto the atmosphere through the ports 90,98.
The conduit 120.communicates with the upper portion
' : cycling valve 132. ' This embodiment could be utilized
where other means, as for example manual, hydraulic or
of the cavity of liquid reservoir 1722 thereby maintaining 35 mechanical, are usedr’or operating thesaw carriage 26.
a constant pressure head on the liquid. The liquid is then
Referring to FIG. 11, the conduit 134 communicates
forced upward through a conventional bottom tube. (not
with a source (not shown) of gas under pressure. Sole‘
shown) in the reservoir to conduit 124 which communi- " ' noid operated valve 132 has a valve stem 138 which cycles
cates with a throttling needle valve 126 communicating
with the valve 112.
r
g
, The bell end 88 of the pneumatic cylinderrhas an-;
other port 100 which is in communication with air pres
sure when and ‘only when the slide valve 86 is in the solid
line position. This port 100. communicates with the con
duit 102 leading to a T junction 104.
air to the conduit 162a leading to the T junction104.
40 The remaining reference parts in FIG. 11 are identical to
V
V
the corresponding parts in the first described embodiment
and they operate identically. Accordingly, the same ref
erence numeralshave been applied to the ?gure and fur
ther description is deemed unnecessary.
The electrical diagram illustrated in FIG. 12 is designed
45
, The main» ?ow of cycled air then passes through the’
to operate solenoid valve 132 in a desired cycle. It con
throttling needle valve 106 into the air conduit 47 which
sists of a hold-in relay 140 which is activated by momena
then communicates with conduit 48 of the De 'Vilbiss
~ atomizer 46. Pressure of the cycled air from the T junc
ing of the relay 140 activates the solenoid 132 to the open
tion .104 is simultaneously applied to the enlarged spindle
head 198 of valve spindle 110 of liquid control valve 112.,
This raises spindle 110 against the loading of spring 128
to deliver liquid out port 130 to liquid conduit 49 leading
to atomizer 46.
‘
V
.
Operation
Compressed air is applied to the conduit 114, passes’
. through the conduit 84 and by means of the valve 78 the
tary closing of the normally open switch NO. 7 The clos
so position. Momentary opening of the normally closed
switch NC permits the relay 140 to’ drop out to deener=
gize the solenoid 132 thereby closing the valve 138.
Switches NC and NO may be conveniently operated by
stops such as the stops 70 and 72 of the ?rst embodiment.
65 That is, the stop 70 when contacted would momentarily
close the normally open switch NO and the stop 72 when
contacted would momentarily open the normally closed
switch NC thereby cycling air to the conduit 102a.
piston‘ 57 is reciprocated backward and forward for com
It is obvious that either illustrated embodiment of this
plete cycle. Forward movement of the piston to the left 60 invention could be used with a system employing a sta
represents the work stroke and backward movement of
the piston to the right represents the idling stroke. Dur
ing the work stroke, compressed air is applied by the
valve 78 to the'conduit 102 thereby applying air past the
tionary cutter having means to move the workpiece. It is
further obvious that the invention could be used with any
application requiring cycled control of an atomized mist.
I claim:
.
T junction 104 tothe conduits 47, 48 of the Dev Vilbiss 65
1. In a jet spray device, a source of liquid under pres
nozzle and at the same time opening the liquid control
sure, a nozzle, a liquid conduit communicating said liquid
valve 112 to admit liquid to the conduits 49, 50 of the
source to said nozzle, a source of gas under pressure, a
De Vilbiss nozzle. 7 The liquid in the reservoir 122 is kept
gas conduit'communicating said gas source to said nozzle,
under a constant pressure head through the T 116 and
70 a valve in said liquid conduit separate from said nozzle, a
conduit 120 irrespective of the cycling by valve 78.
mechanism to operate said valve, said mechanism being
The needle throttling valve 126 for the liquid is located
operatively responsive to pressure in said gas conduit to
between the reservoir 122 and the liquid control valve 112.
open said valve so that when gas under pressure is ap
This is an’ important feature of the invention since, lo
plied to said gas conduit said valve will be opened sub
cated at this point, the valve is not subjected to cycled 75 stantially simultaneously, and a throttling valve opera
3,022,694
‘atively mounted in said liquid conduit at a point in said
conduit betveen said liquid controlling valve and said
source.
6
means from said liquid control valve to said nozzle, a
T-junction, conduit means from said auxiliary discharge
port to said junction, conduit means from said junction
to said liquid control valve, and conduit means including
2. In combination with a cuto?f device, a reciprocating
mechanism operative to produce relative motion between (ll a throttle valve from said junction to said nozzle, whereby
said cuto?’ device
a work piece, stop trips associated
with said reciprocating mechanism to control and delimit
when said plunger in said slide valve reciprocate to un
cover said forward and reverse ports in sequence, said
auxiliary port will be uncovered on the work stroke to
its stroke, a source of liquid under pressure, a source of
supply compressed air to said junction, thereby supplying
gas under pressure, a spray nozzle, a liquid conduit com
municating said liquid source with said nozzle, a gas con 10 compressed air to said nozzle and also actuating said
liquid control valve to supply coolant to said nozzle, and
duit communicating said gas source with said nozzle, a
whereby a mist spray coolant is supplied to said work
engaging element only during the work stroke.
a mechanism to open said normally closed valve, said
8. In combination, a source of compressed air, a T
mechanism being responsive to pressure in said gas con
duit to open said liquid valve, valve means in said gas 15 junotion, conduit means from said source to said junction,
an air control valve, conduit means from said junction to
conduit between said source and said mechanism, said
said air control valve, a liquid reservoir, conduit means
valve means being operated from said trip stops to cycle
from said junction to said reservoir to maintain a constant
gas from said source into said gas conduit on each stroke
pressure on said liquid, at liquid control valve, conduit
of said reciprocating mechanism, and a throttling valve
means including a throttle valve from said reservoir to
in said liquid conduit between said normally closed valve
said liquid control valve, 21 second T-junction, conduit
and said source, whereby said throttling valve will not
means from said air control valve to said second junction,
damp the closing action of said normally closed valve.
conduit means from said second junction to said liquid
3. Reciprocating means associated with a cutoil tool
control valve, said liquid control valve being responsive
and having a Work stroke and an idling stroke, a nozzle
mounted adjacent said cutoff tool to apply a jet spray on 25 to the discharge of said air control valve, a nozzle, con
duit means from said liquidcontrol valve to said nozzle,
a work stroke, a source of liquid under pressure, a source
and conduit means including a throttle valve from said
of gas under pressure, a liquid conduit communicating
second junction to said nozzle, whereby liquid is supplied
said liquid source with said nozzle, a gas conduit inde
to said nozzle only when compressed air is supplied to
pendently communicating said gas some with said noz
zle, a valve in said liquid conduit, mechanism to open 30 said nozzle, and whereby the amounts of liquid and com
pressed air supplied to said nozzle ‘are separately and
said valve in response to pressure in said gas conduit, 21
independently controlled by said throttle valves.
valve interposed between said gas conduit and said source,
normally closed liquid valve closing said liquid conduit,
means operatively connected with said reciprocating mech
9. In combination, a source of gas under pressure, a
anism to open said gas valve at the initiation of a work
stroke and to close said valve at the completion of a work
stroke whereby gas may enter said gas conduit and said
slide valve having a closed position and an open position,
means to cycle said valve from one position to another,
nozzle during a work stroke and substantially instantane
ously therewith liquid under pressure will enter said noz—
zie, and a liquid throttling valve located between said
liquid valve and said liquid source.
of liquid under pressure, a liquid control valve, conduit
4. A device substantially as set forth in claim 1, further
characterized by a throttling valve in said gas conduit.
5. A device substantially as set forth in claim 3, further
characterized by a gas throttling valve in said gas conduit
subsequent to said responsive mechanism.
6. A spray generator capable of substantially immedi
ate operation and shutdown and having a mixing nozzle
for liquid and gas, a source of gas under pressure, a
conduit means from said gas source to said valve, a source
means from said pressurized liquid source to said liquid
control valve, 9. throttle valve in said conduit means, a
T-junction, conduit means from said slide valve to said
junction, conduit means from said junction to said liquid
control valve, a nozzle, conduit means from said liquid‘
control valve to said nozzle, conduit means from said
junction to said nozzle, and a throttle valve in said last
narned conduit means, whereby gas and liquid under pres
sure are supplied to said nozzle only when said slide valve
is cycled to the open position, said liquid control valve
being actuated by a constant pressure of gas, and whereby
the amounts of gas and liquid under pressure supplied to
source of liquid under pressure, a liquid valve separate
from said nozzle communicating said liquid source to said 50 said nozzle are separately and independently controlled
by said throttle valves.
nozzle, and means communicating said gas source to said
10. In combination: a reciprocating carriage having a
nozzle, mechanism operative in responsiv to said gas
work stroke and an idle stroke, a power-driven work
communicating means to open said liquid valve, and a
engaging element carried by said carriage, means includ
throttling valve between said liquid source and said
ing an air cylinder to reciprocate said carriage, a source
liquid valve.
of compressed air, conduit means from said compressed
7. In combination, a power tool having a reciprocat
air source to said air cylinder, an air valve in said conduit
ing carriage, a work-engaging element on said carriage,
means, said air valve having two positions corresponding
means to reciprocate said carriage, said means includ
respectively to the work stroke and the idle stroke of said
ing a pneumatic cylinder having forward and reverse
carriage, whereby in one position of said air valve said
ports and further having an auxiliary port, a slide valve
carriage moves on its work stroke, and in the other posi—
including a reciprocating plunger, a source of compressed
tion of said air valve said carriage moves on its idle
air, conduit means from said source to said slide valve,
stroke, means responsive to the reciprocation or" said car
means to actuate said reciprocating plunger in said slide
riage to actuate said air valve from one position to the
valve, said means including a trip rod actuated by said
reciprocating carriage, whereby said slide valve uncovers 65 other position, a mist spray nozzle adjacent said work
engaging element, conduit means including a throttle
said forward and reverse ports in sequence to cycle said
valve from said air valve to said nozzle, whereby com
reciprocating carriage, one of said ports corresponding to
pressed air is admitted through said air valve to said
a work stroke, a reservoir of liquid coolant, conduit
means from said source of compressed air to said reser 70 nozzle in the position of said valve corresponding to the
work stroke of said‘ carriage, a source of liquid coolant
voir, whereby a constant pressure is maintained on said
under pressure, a liquid control valve, conduit means in
liquid coolant, a spray coolant nozzle positioned adjacent
cluding a throttle valve from said liquid coolant source
to said work-engaging element, a liquid control valve,
to said liquid control valve, conduit means from said
conduit means from said reservoir to said liquid control
valve, a throttle valve in said conduit means, conduit 75 liquid control valve to said nozzle, conduit means from
3,022,694
7
said air valve to said liquid control valve, said liquid con
trol valve being opened only when said air valve admits
compressed air to said nozzle, whereby when said air
valve admits compressed air to said nozzle during the
work stroke of said carriage, said liquid control valve is 5
opened to simultaneously admit liquid coolant under pres‘
suretto said nozzle,tsaicl liquid control valve being closed
during the idle stroke of said carriage, and whereby the
relative amounts of liquid coolant and compressed air
may be separately and independently regulated
8
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,107,732
2,578,102
2,701,906
2,707,657
2,801,458
2,838,825
2,859,323
2,936,802
Gustafsson et al.' _______ __ Feb. 8, 1933
Stephenson et a1 _______ __ Dec. 11, 195]
Casey _____ __; _______ __ Feb. 15, 1955
Paasche __________ __'____ May 3, 1955
Remmen ______ Q. _____ __ Aug. 6, 1957
Knollenberg __________ __ June 17, l§58
Veres ___________ __'_V____ Sept. 2, 1958
Skoog _______________ __ May 17, 1960
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