close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2122887

код для вставки
July 5,' 1938.
2,122,887
w. |_`. MCGRATH
LIGHTÍNG CONTROL SYSTEM
Filed .Aprilv 27, 193e
34»
32P
34
RESERVOlR
Z
d4
szw
l
TME \N sEcoNDS
PRESSURE »N PIPES? 2
PRESSURE 1N PIPE 5l o
,
8
0%
Patented July 5, i938
' maar
nutren stares esserti“ .ortie
LHGHTHNG CONTRÜL SYSTEM
William L. McGrath, Minneapolis, Minn., as
signor to ‘Minneapolis-Honeywell Regulator
Company, Minneapolis, Minn., a corporation of
Delaware
v
.
>
, Application spin agisse, serial No. 76,534
n zsoiaims. (eins-_312)
This invention relates to lighting control sys- pressure motor and single control'valve means
ltems in general and more particularly to lighting control systems for use in theaters, audi-
for proportionately brightening the'lights.
Other objects and advantages will become ap
toriums and the like. '
parent to those skilled in the art upon reference
Present day theaters areequipped with various
_groups of lights for obtaining dinerent lighting
to> the accompanying specification, claims and
drawing, in which drawing;
effects on the stage and in the auditorium proper.
These groupsoi lights usually comprise íootlights, border lights andiiood lights for the stage
and dome lights, wall lights >and alcove lights for
Figure l diagrammatically illustrates my light
ing control system, and
_
Figure 2 is a graph illustrating the theory of
the proportionate brightening and dimming por 10
the auditorium. Each group is generally provided
tion of my invention.
with a plurality of variously colored lights. The
various lights of the variousÍ groups are usually
controlled by means of an ordinary resistance
Referring now to Figure 1, a plurality of light
ing loads are generally designated at ill, Il, l2,
and i3. These lights may be locatedin any d‘e
'
15 type dimmer plate or by means of the more re- _ sired place. The lighting loads lo, ll, l2, and I3 ‘
cent core type reactors where the lighting load
are controlled by lighting CODÈI‘Ol dëViCeS it, i5,
is relatively great.
I6, and il respectively.
¿ »
'
Although any type of
Attemptsl have been made in the past to re--V lighting control device maybeused,îhave shown,
motely control the various lights of the various for purposes of illustration, aconventional dim
20 groups but these attempts have not been entirely mer plateV for this purpose. The lighting control
successful.
‘
devices M, I5, I6, and il may be operated by
.It is, therefore, the prime 'object of this inven- pressure motors i8, I9, 2li, and 2l respectively,
tion to control the various lights of the various , 'the pressure motors being illustrated as expansi
groups in a new and novel manner whereby in- ble bellows. The pressure motors it, i9. Eiland
~
2l are controlled by control valves 22, 23, 2li, and
' numerable combinations of colors and >intensities
of. lights may be obtained and accurately con- ,
trolled.
ì
'
i
’ A control valve,generallylrindicated at r2li, is
In carrying out my invention, I _contemplate
locating the resistance type dimmer plates or the
30 core type reactors adjacent the lights that they
provided to cause simultaneous operation of all
of the pressure motors whereby the light in
tensities of the lighting loads may be propor
tionately brightened. Another control valve,
generally designated: at El, is provided for simul
taneously operating all of the pressure motors to
cause proportionate dimming of the lights. Air" 35
under pressure _is supplied to the control system
from a reservoir 29. A compressor 3B supplies air
control,I operating these resistance type »dimmer
plates or core type reactors by power means, which
may take the form of pressure motors operatively
connected thereto, and controlling these pressure
' motors by control devices which may take the
form of valves located on a conveniently located
panel board.
'
An object of this invention is to provide a con~
trol system for controlling the intensities or colors
@lo
of lights comprising a pressure operated motor
operable to a plurality of positions and a remotely
located valve for controlling vthe pressures de
livered to the motor whereby the intensities or
colors of the lights may be accurately controlled.
Another object of this invention is to provide
a plurality oi >control devices for controlling the
intensities or colors of lights with a pressure
motor `for each control device, valvedmeans as
sociated with each control device for controlling
50 the same and a single valve means for propor
tionately dimming the lights."
,
_‘
j
25 respectively, whereby the pressure motors may
be individually adjusted to any desired position.
'
Still'another object of this invention is to pro
vide a lighting control system having a plurality
of control devices with a pressure motor for each
control device, control valvev means for each .
to the reservoir 39 and maintains the pressure in
the reservoir 29 substantially constant. For pur
poses of illustration, the pressure maintained in 40
the reservoir is assumed to be substantially 20st.
Line Wires leading from vsome source of power,
not shown, are designated 32 and 33. The line
wire 32 is connected by a wire 3ä to lights 35
4forming the lighting load. _Lights 35 are in turn
connected by a> wire 36 and a switch 3l to the
slider>38 of the control devices. The slider 38 is
A adapted to slide across a resistance 39 one end of
which is connected by a wire 4D to the other
linewire'SîS.> The slider 38 is connected by a
link 43 to the pressure motors and upon ex«
pansion of the pressure motors, the sliderv 38
is rotated in a clockwise direction. A spring 'Ml
is provided for normally urging the sliders 3B
irl'v a counter-clockwise direction. The arrange 55
2
2,122,887
ment is such that as the pressure in the pres
sure motors increases, the sliders 38 are moved
towards the right to decrease the resistance in
series with the lights 35 whereby the light in
tensities of the lights are brightened. Upon a de
crease in pressure in the pressure motors, the
sliders 38 are moved to the left to increase the
`resistance in series with the lights 35 to de
crease the light intensities thereof. When sub
stantially all of the resistance has been placed
in series with the lights 35 >to decrease their
- illumination to a minimum value„a lug 4I car
The above operation is predicated on the fact
that the valve 26 is open andthe valve 21 is
closed. Ifthe valve 26 is maintained open to
maintain a pressure in the vent header 5I of sub
stantially 0# and if the valve 21 is moved from
the closed position shown towards the _open posi- '
tion, the pressure in the supply header 51 will
decrease and when the valve has become fully
open, the pressure in the supply he'ader 51 will
be substantially zero., vAs pointed out above, 10
there is an oriñce 59 between the branch supply
pipes 58 and the pipes 46, 41, 48, and 49 and by
ried by slider 38 >opens switch 31 whereby'the
reason of these oriñces, the pressures in the pipes
lights are extinguished.
46, 41, 48, and 49 will be reduced at a rate pro
portionate to the decrease in pressure in the sup
-
The pressure motors I8, I9, 20, and 2I are con
nected to the valves 22, 23, 24, and 25 by means
of pipes 46, 41, 48, and 49 respectively. The
valves 22, 23, 24, and 25 are in turn connected to
branch pipes 50 -whichterminate in a vent header
5I, which is controlled by the valve 26 so that
when the valve 26 is open the header 5I is vented
to atmosphere and when the valve 26 is closed,
venting of the header 5I is prevented. The com
pressor supplies compressed air to the reservoir
29 through a pipe 54 and compressed air is taken
from the reservoir 29 through a pipe 25 andan
orifice 56 and delivered into a supply header 51.
The supply header 51 is connected bybranchpipes
58 through orifices 59 to the pipes 46, 41, 48, and
30 49. The supply header 51 is adapted to be vented
through a vent pipe 6I controlled by the control
valve, generally indicated at 21.
Each of the control valves is provided with a
combined operating handle and pointer 64 for
positioning the valves and for indicating the posi
15
ply header 51..‘Speciñca1ly, as the pressure in
the supply header 51 is reduced, to say 104i, the
pressures in the pipes 46, 41, 48, and 49 will be
reduced to 21/2#, 5#, '1l/2# and 10# respectively
and when the pressure in the supply header 51
is reduced to Dit, the pressure in the pipes 46, 41,
48, and' 49 will be reduced- to 0# and they
will all be reduced to 0# at substantially the
same time.
This mode of operation is graphically illus 25
trated in Figure 2, wherein the solid lines I, 2, 3,
and 4 designate the pressures in the pipes 46,
41, 48, and 49 respectively. From this graph
it is seen that as the pressure in the supply header
51 is gradually decreased from 20# to 0#_, the 30
pressures in the pipes 46 41, 48, and 49 are re
duced to D# but at a different rate whereby they
are all reduced to 0# at substantially the same
time. Since the light intensities of the lights Ill,
II, I2, and I3 are directly proportional to the 35
pressures existing within the pipes 46, 41, 48, andl
Suitable indications may be pro
vided to cooperate with the pointer .to indicate 49, the light intensities of these lights are pro
the positions of the valves. The indications of portionately dimmed so that they are all ex
tinguished at substantially the same time. This
valves 22, 23, 24, and 25 are illustrated as in
fact is also illustrated in Figure 2 by the solid
-lU dicating the percentage of maximum light in
tensities, while'the indications of the valves 26 lines- I, 2, 3, and 4 when taken in connection with
and 21 indicate the positions of these valves. As the ordinates and abscissas designated time and
shown by the designations `associated with each percentage of illumination.'
valve, the valve is open when the pointer is in
Assume that the valves 22, 23, 24, and 25 are
the extreme left position and is closed when the in the position shown in Figure 1, that valve 2,6 is
pointer is in the extreme right position. With open as in Figure 1, and that valve 21 is also
the various Valves in the positions shown in the open, therefore the pressures in the supply header
drawing, the `vent valve 21 is closed, the vent 51 and in thevent header 5I are substantially
valve 26 is open, the control valve 22 is three
0#. The _pressure motors I 8, I9, 20, and 2|K are
contracted and the lights are all extinguished.
$0. quarters open, the control valve 23 is half open,
the control valve 24 is one-quarter open and -Movement of the valve 21 from this open posi
the control valve 25 is closed. With these valve tion towards the closed position, shown in Figure
positions and with a 20# airpressure supply, the 1, gradually increases the pressure in the supply
pressure in the supply header 51, and conse
header 51 and the pressures in the pipes 46, 41,
48, and 49 will be gradually increased at a rate
ci Ln quently the branch pipes 58, is 20#, the pressure
in the vent header 5I is 0#, and the pressures dependent upon the positions, of the valves 22,
in the pipes 46, 41, 48, and 49, and consequently 23, 24, and 25. When the valve 21 is fully closed,
the pressure motors I8, I9, 20, and 2| are 5#, vthe pressures in the pipes 46, 41, 48, and 49 will
10i-",- 15#, and 20# respectively. With these pres
arrive at pressure values of 5#, 101i', 15# and-20#
60 sures existing in these pipes and pressure motors,
respectively
at substantially the same time.
the lights l0, II, I2, and I3 are adjusted to 25%,
50%, '15% and 100% of their maximum light Therefore, movement of the valve 21 from the
open position to the closed position causes pro
intensities.
'
Movement of any of the vvalves 22, 23, 24, and portionate increasing of the pressures in the mo
25 from their respective positions shown in the tors I8, I9, 20,and,2| to the pressures determined
drawing will cause proportionate movement of_ by the positions of their associated control valves,
y their associated pressure motors and consequent and consequently, the lights will be brightened
' tions thereof.
40
46
50
55
proportionate adjustment of the lighting loads ' vfrom an extinguished condition to a per cent of
controlled thereby. Speciñcally, if thevalve 22
is moved from the three-quarter open position to
half open position, the light intensities of the
lights I6 will be increased from 25% to 50%.
Therefore, I have provided ~a control- system
wherein the lighting loads may be individually
75 and independently adjusted as desired.
illumination determined by the‘positions of their
associated control valves.
70
From the above it is seen that I have not only
provided a lighting control system where the lights
may be individually adjusted but I have also pro
vided a means whereby the lights may be pro
`portionately dimmed from any intensity to a given 75
3
il, 122,887
intensity and proportionately brightened from the
ner in which this is accomplished is graphically
given intensity to any selected intensities.
If the valve 21 is-> maintained in the closed
position shown in Figure 1 so as to maintain sub
stantially a 20# pressure ‘in the supply header
S'I and if the valve 26 is moved gradually from
the open position to the closed position, the pres
illustrated' in Figure 2.
sure in the vent header 5I is allowed to increase
from 0# and when the valve 2G is entirely closed,
10 the pressure in the vent header 5I will increase
to substantially 204%. By reason of the mainte
nance of a pressure of 20# in the supply header
51 andby reason of the orifices .59, an increase
in pressure in >the vent header '5I causes a pro
15 portionate increase in the pressure inthe pipes
48, 4l, 4B, and 49 and when the pressure in the
vent header 5I reaches 201i.> the pressure in the
pipes 40; '411, H8, and 49 will likewise reach 20#.
Reference is again made to Figure 2 wherein these
increases in pressure are 'designated by the dotted
lines, the dotted lines I, 2, 3 and 4 representing
the pressures in the pipes ¿16, lil, 40, and 49 re
spectively.v Since the pressures in these pipes all
reach 20# at substantially the same time and in
25 a proportionate manner and since the light` in
tensities of the lights are adjusted in aman
ner proportionate to, the pressures in their re
spective pipes, the light intensities are increased
from Vthe values shown to 100% intensity and
30 they all arrive at this 100% value at substantially
the same time.
Y
~
Assume that the valves 22, 23, 2t, and 25 are
in the position shown in Figure 1, that the valve
2l! is closed as in Figure l, and that the valve
35 26 is closed. By reason of these valve positions,
the pressures in the supply .header El and the
vent header 5I are substantially 20# and the pres
sures in the pressure motors I8, I9, 20, and 2i
are also substantially 20#. Therefore, the lights
40 are maintained at 100% brilliancy. >Movement
of valve 26 from the closed position to the -open
position in Figure 1 causes gradual reducing of
the pressure4 in the vent header 5I ' from 20# to
Dit, and consequently, the pressures in the pres
sure motors I0, I9, 2li, and 2| are proportionately
reduced to pressure values corresponding to the
adjustments of the valves 22,23, 24, and 25 re
spectively and the pressures in the various pres
sure motors will arrive at their reduced pressure
values at substantially the same time. Therefore,
' the lights are dimmed from 100% intensity to
that intensity determined by their associated vcon- »
trol valves and the lights -will all arrive at the
selected intensities at substantially the same time.
Thereforcàby reason of thel above construction.
55
I have provided~ true proportionate brightening
oi' the lights from ~given values to a predetermined
other value and also true proportionate dimming
of the lights from that predetermined other value>
to the selected values.
'
.
.
In Figure 1, I have also illustrated another way
of accomplishing proportional dimmi-ng instead
- of that outlined above. This other manner con
templatesthe use of a valve „in the supply
header 51 and also the use of orifice vents 61 in
the pipes 4G, 41., 4I, and 40. The valve ß con
trolsdirectly the pressure in the supply header S'I.A
As the valve 66 is moved from the open position>
to the closed position, -the pressure in the 'supply
70 header 51 is allowed to decrease byreason of
the vents I1. Due to the oriilces Il theï pressures
K
.
It is to .be understood that the above exem
plification of my invention is for purposesf’of
illustration only and not for purposes of limita
tion, also the various pressures utilized in con
nection with the description of my invention may
be varied at will to arrive at the desired mode of
operation. Other forms of my invention may be
come obvious to those skilled in the art and con 10
sequently this invention is to be limited only by
the scope of the appended claims and prior art. .
I claim as my invention:
,
.
_ l. In a lightingcontrol system, the combina»
tion of lighting means for giving a desired light 15
ing effect, regulating means in control of said
lighting means, a pressure motor for. positioning
said regulating means, means for biasing the>
pressure motor and the` regulating means in one
direction, a source of air under pressure, a vent 20
for said pressure motor, and> valve means con
trolling the air pressure in said pressure motor,
the air under pressure acting against said bias
ing means whereby the lighting eiîect is controlled
in accordance with the positions of said valve 25
means.
'
2. In a lighting control system, the combina
tion of lighting means for giving a desired light
ing effect, regulating means in control of said
lighting means, a pressure motor for positioning
said regulating means, means for biasing the pres
sure motor and the regulating means in one di
rection, a source of air under pressure connected
to said motor, the air under pressure acting
4_against said biasing means, a vent for said motor, 35
and valve means for controlling said vent where
by the lighting effect is controlled in accordance
with the position of said valve means.
3. In a lighting control system, the combina
tion of lighting means for giving a desired lighting
effect, regulating Vmeans in control of said lighting
means, a pressure motor v’for positioning said
regulating means, means for biasing the pressure
motor and the regulating means in one direction,
a source of `air under pressure connected to »said
motor, 'the air under pressure acting against said
biasing means, an orifice in said connection, a
vent for said motor, and valve means for con
trolling said vent whereby the lighting effect is
controlled inaccordance with the position of said
valve means.
"
‘
'
j
4. In a lighting control system, the combina
tion of lighting means for giving a desired light
ing effect, regulating means in control of said
lighting means, a pressure motor for positioning
said regulating means, means for biasing the
pressure motor and the regulating means .in one
direction, a source of air under pressure, a vent
for said pressure motor, valve means controlling
the _air pressure inv said pressure motor, the air
under pressure acting against said biasing means
whereby the lighting eiîect is controlled in ac
cordance with the positions >of said valve means,
and other valve means controlling` the supply of
air pressure >to said pressure motor.
5.-In a lighting control system, the combina
tion of lighting means for givinga desired light
ing eiïect, regulating means in control of said
lighting means, a pressure motor for positioningsaid regulating means, means for biasing the 70
pressure motor-and the regulating means in one
in the pipes .46, 4l,> 48. and 4! decrease at a »rate- direction, a source of air under pressure, a con
proportionate to the rate of .decrease >of pressure nection between said source of pressure and said
in the supply header l1 which gives truepropor-` , _ motor, the air under pressure -acting against said
biasing means, a vent for said motor, valve means
tional dimming of the lights and the speelde man
f...
.
__(
2,122,887
. for controlling said vent whereby the lighting ' lating/means, a soumeof air under pressure, a
supplyÍ header connected .to said source of air
under pressure, connections between said supply
header and said pressure motors, a vent header,
eiîect is lcontrolled in accordance with the posi
tion of said valve means, and. valve means asso
clated with said connection for controlling the
' connections between said vent header and said 5
ß supply of air to said pressure motor. I
> 6. Ina lighting control system, the combina
_ tion of lighting means for giving a desired light
Y
pressure motors, and valve means ineach ci said
last mentioned connections to variably vent each
of said motors whereby a desired lighting. eiIect
ing eiîect, regulating means in v'control of said
lighting means, a pressure motor for positioning
.
>ls obtained.
11. In a lighting control system, the combina- l0
l0 said regulatlng‘means, means'for biasing the ~
pressure motor and the regulating means inK one tion of lighting means for giving a desired light
ing eii'ect, a plurality of regulating means in con-‘
direction, a source ci!> air underwpressure con
trol of said lighting means, a pressure motor i'or
nected to said motor, the air under pressure act
lng against said‘biasing means, a vent for said , ,each regulating means for positioning said regu
lating means, a source of air under pressure, a l5'
15. motor,` valve means »for controlling said vent
whereby the lighting eiîect is controlled in ac - supply header connected to said source of air un
cordance with the position of said valve means, der pressure, connections between said supply
header and said pressure motors, a vent header,
and other valve means associated with said vent
connections between said vent header and said
for additionally controlling >the venting of said
20
motor.
,
'
pressure motors, valve means in each of said last 20
.
mentioned connections to variably vent each of
said motors whereby a desired lighting eiïect is
'7. In a lighting control system, the combina
tion of lighting means for giving a desired light
obtained, and valve means ln control of the sup
ply oi air to said Isupply header to variably po
sition all oi said motors whereby lighting eñect 25
ingeiîect, regulating means in control of said
'lighting means, a pressure motor for positioning
- 25 said- regulating means, means for biasing the
isfproportionately varied.V
pressure motor and the regulating means in _one
'
l2. In a ligli’ting control system, the combina
tion oi lighting means for giving a desired light
,ing effect, _a plurality oi regulating means in con
trol of said lighting means, a pressure motor for. 30
each regulating means for positioning said regu
direction, a source of air .under pressure, a con
nection between the source of pressure and said
motor, the air under pressure acting against said
ai)V biasing means, a vent for said motor, valve means
for controlling said vent whereby. the, lighting
effect is _controlled in accordancawith the posi
lating means, a source of airA under pressure, 'a
tion of said valve means, valve means associated . supply header connected to said source ci air
with said connection for controlling the supply
under pressure, connections between said supply
each regulating means for positioning said regu
lating means, means for biasing each pressure
whereby the lighting eiIect is4 proportionately
:5.0i air to said‘pressure- motor, and other valve e header and said pressure motors, a vent header, 35
means associated with said vent for additionally f connections between saidzvent header and said
y pressure motors, valve means in each of said last
~ Ícontrolling the venting of said motor. l
vmenticned-cdnnections to variably vent each of
_
8. In alighting Vcontrol system, the combina
tion oi lighting means for giving a desired light = saidmotors whereby a desired lighting efiect is
4_0 ingelîect, a plurality of regulating means in con- ' obtained, and valve means in control of said vent
trol of said lighting means,> a pressure motor for header to variably -positlon all o! said motors
13. In `a lighting control system, the combina- ~
ymotoriand regulating meansin one direction, a
ß source of airunder pressure, a vent for each pres
tion of lighting means for giving a desired light- 45
lng eiîect, a plurality of regulating means in con
sure motor, and vvalve means for each pressure
trol of said lighting means, a pressure motor for '
motor for controlling the.air pressure in said
motors, the air under pressure acting against " each regulating means for positioning said regu
said biasing means whereby each motor is posi ïlatlng. means, a source of air under pressure, a
50 tioned in accordance with the adjustment of _its sûpply header connected to -said source of air 50
associated valve means to give -a desired lighting . under pressure,` connections between said supply
header and saidpressure motors, a vent header,
eiïect.
_
.`
y
,
>connections betweenv said vent header and saidv
9. «In ya lighting control system, the combina
tion of lighting means for giving a desired llght-,
._ 55 ing effect, a plurality of regulatlng'means in con
’ trol of. said lighting means, a pressurekmoto'r for
pressure motors, valve means in each of said last
mentioned connections to variably vent each of 55
said motors whereby a desired lighting effect is
` " each regulatingl means for positioning said regu- - obtalned, and valve means in control o1 said sup- '
lating means, means for biasing each pressure
' motor and regulatingfmeans in one direction, a
'- “00 source of air under pressure, a vent for each -pres
-sure motor, valve means for each pressure motor
ply header and ln control of said vent header
_to variably position all of said Amotors whereby)
’ the lighting eiiect is proportionately varied., _
14. In a lighting control system, the combina
tion of lighting means for giving a desired light
_the-air pressure acting ag nst said biasing means `ing effect, arplurality of regulating means in con
, _whereby each m'otor is positioned in accordance, trol of said lighting means, a pressure motor for
65 with the adjustment of its associated valve means ' each regulating means for positioning said regu
to give la desired lighting eilect, and other valve lating means, a source oi air under pressure, 'a
V means ln control of the supply .of co -ressedïair supply header connected to said source of air
_ > for controlling ‘the air pressure in said-motors,A
to said motors _to cause proportiona operation under pressure, connections between said supply- ' of said motors whereby the lighting efiect is pro-_ _header and -said pressure motors, a vent header, ¥
connections between said vent header *and said 70
7o 1 portionately varied;y l .
_
--pressure 4motors,- valve means in each _ci said
last mentioned connections to variably vent each
1U.y In a lighting controlsystem, the combina
tion 6I .lighting means for giving a desired light
ing effect, a plurality of >regulating means in con ' of said motors whereby> a desiredy lighting eilect
trol of said lighting- means, a 'pressure motor for isl obtained, a vent .for said supply header, and
^
valve means in control cit-said- vent to variably 'Il
75 yeach regulating means for positioning. said regu
.
«
'
l
r
~.
i
5 ,
2,122,887 '
position' all of said motorswhereby the lighting under pressureya’ supply header connected to said
effect is proportionately varied.
source, a vent header, connections between said
, 15. In a lighting control system, the combina
supply header, each of said motors and said vent
tionof lighting -means for giving a desired light
header, valve means for each motor in said con
ing eñect, a plurality of `regulating means in nections to _adjustably position each motor in
accordance with the-adjustment of its associated
‘ control of said lighting means, a pressure motor
for each regulating means for positioning said valvemeans, and valve means in control of said
regulating means, a source of air under pressure, supply header for additionally controlling the
_
a supply header -connected 'to said source of air positions of all of ysaid motors.
under pressure, connections between said supply
'20. In a control system, the combination of a 10
header and said pressure motors, a vent header. " plurality of pressure motors, a source of fluid
connections between said vent header and said under pressure, >a supply header connected to
pressure motors, valve means in each of said last .said source, a vent header, connections between
mentioned connections to variably vent each of said supply header, each of said motors and said
said motors whereby a` desired-lighting eiIect is vent header, valve means for each motor in said
obtained,lac_vent for said supply“ header, a vent connections to. adjustably position each motor in
for said vent header, and valve means in controll >accordance with the adjustment of its associated
, of said vents to varlably position all of said mo
valve means, valve means in control of said vent
header for additionally controllingthe positions
tors whereby the lighting effect is proportionately
varied.
"
'
of all of said motors, and valve means in control
.
of said supply header for additionally controlling
the positions of all of said motors.
16. In a control system, the combination of a
4plurality of pressure motors, a source of fluid
_under pressure, a supply header connected to said
source, connections between said supply header
2o.
2l. In a control system, the combination of a
plurality of pressure motors, means for supplying
and each o1’ `said motors, a vent header, connec- - actuating fluid to each of said pressure motors 25
tions between said vent header and each of said and >venting actuating fluid therefrom, valve
means for s_aid means and associated with each
motors, valve means in said last mentioned-con
nections to adjustably position said motors, a pressure motor for controlling the pressure there
vent for said vent header, valve means in control in whereby each pressure motor may be posi
of said vent, a vent för said Supplit header, and tioned in accordance with the adjustment of its valve means in control of said last mentioned associated valve means, and valve means for
controlling the venting' of the` actuating ñuid
vent.
" 17. In a control system, the combination of a t from all of the pressure motors.
22. In a control system; the combination of a
plurality of pressure motors, a source of fluid
plurality of pressure motors, means for supplying
actuating iiuid to each of said pressure motors,
and 'venting actuating fluid therefrom, valve
underpressure, a supply ,header connected to said
source, connections Vbetween said Supply header
and each of said motors, a vent header, connec
tions between said vent header and each of said
motors, valve means in said last mentioned con
nections to- adjust-.ably position said motors, >a
means for said means and associated with each
of said vent, valve means in control ofthe supply'
of. iiuid to said supply header, and orifice vent
pressure motor for controlling the pressure there
in whereby e‘ach pressure motor may be posi
tioned in accordance with the adjustment of .its
associated valve means, and valve means for
venting thevactuating'ñuid from all of the pres
means for said motors.
sure motors.'
vent for said vent header, valve meanshin control
.
' '
`
18. In a control system, the combination of a
plurality of pressure motors, a source o1' ñuid
under pressure, a supply header connected to
said source, a vent header, connections between
'
.
'
-
23. In a control system, the combination of a
plurality of pressure motors, means for supplying
actuating ñuid to each of said pressure motors
and `venting actuating ñuid therefrom', valve
said supply header, each of said motorsand said ' means for said means and associated withr each
valve means, and valve means in control of said
pressure motor for controlling the p 'ure there
ln whereby each pressure motor ay be posi- ‘
tioned in accordance with the adjustment of'its
associated valve means, and valve means for pre
vent header for additionally4 controlling the posi
ventingventing of the actuating fluid from all-
tionsV of all’ of saidmotors..
of the pressure motors.
vent header, valve means for each motor in said
connections to adjustably posltion'each motor in
accordance with the adjustment of its associated
4
-
,i
19.‘In a control system„the combinationv o! a
plurality or pressure motors, a! source of ñuld
55
Документ
Категория
Без категории
Просмотров
0
Размер файла
952 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа