close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2407018

код для вставки
Sept-3,1946.
‘
‘
,
D. MécKENZIE
_
_ 2,407,018
FLUID-ACTUATEDICON'I‘ROL’SYSTEM
' Filed Jung so, 1941
PUMP!’
JULE/UO/D OPERATED
kaszerola
C)
meo'rn: omit/l17
‘
_
:Inve?iorn
‘Donald MacKenzie'
'ba/d
‘
I
'
Patented Sept. 3, 1946
2,407,018
UNITED sTATEs‘ PATENT OFFICE
2,407,018
‘FLUID-ACTUATED CONTROL SYSTEM
Donald‘MacKenzie, Cheltenham, England, assign
‘or to Dowty Equipment Limited, Cheltenham,
England
Application June 30, 1941, Serial No. 400,539
In Great Britain October 15, 1940
9 Claims. (01. 177-5311)’
1
.
part of the actual ?uid system need come into
The present invention relates to remote control ‘
systems.
the control station. The electrical connection be
.
Though primarily intended for use in hydraulic
control systems for aircraft as employ double
acting hydraulic jacks for such operations as
raising and/or lewering alighting gear, ?ap con
trol, controlling airscrew pitch, operation of gun
tween the control station and the valve or equiv
alent member to be actuated may involve readily
detachable plug ‘connections to facilitate removal
and servicing, and where the system is compli
cated, provision may be made to prevent inad
turrets, bomb-racks, retractable‘ radiators, et cet
vertent or incorrect connection on reassembly.
era, it is conceivable that the invention may also
have useful application to any control system in
Provisions to these ends being well-known, their
which a valve or equivalent actuating member
In order that it may be clearly understood and
illustration has been omitted.
V
readily carried into effect, the invention is here
associated with a device to be actuated needs to
inafter described with reference to the accom
be controlled from some remote point.
panying diagrammatic drawing, which illustrates
It is an object of the present invention to pro
vide an improved ?uid actuated remotely con 15 a ?uid pressure remote control system according
to the invention operable by electrical means for
trolled system in which the jacks are controlled
effecting retraction and extension of undercar
for operation electrically in both senses by‘means
riage jacks.
‘
of press-button switches. Electrical control of
Referring now to the drawing, the engine
the jacks has the advantage that in many cases,
particularly in aircraft structures, the lay-out 20 driven pump I draws actuating ?uid from the
reservoir 2 along the conduit 3, preferably in
cluding the _?lter 4. 'From the outlet of the
pump the conduit 5 feeds through the non-return
the circuit, pipe lines, etc., can be localized in
of the system can be very considerably simpli?ed
owing to the fact that the hydraulic elements of
valve 6 to the electrically-controlled valve 1. The
the structure and wires run off to one or more
remote control stations thereby making it unnec
25 valve 1 is preferably of the kind described in my
‘co-pending United States application Serial No.
398,674, ?led June 18, 1941 (see Figure 2 thereof),
and is controlled electrically by the solenoid 8,
but any convenient form of electrical control
essary to run the ?uid conduits of the system
back to control valves accessible to the pilot.
It is a further object of the invention to pro
vide a satisfactory light-weight fluid pressure re
mote control circuit in which the fluid conduits 30 valve can be used which can be operated selec
tively to establish the required communication to
and the associated ?uid circuit is kept as simple
the conduits 9 and I0, ?ow through which oper
as possible and in which the means for actuating
ates the jacks H for extension and retraction,
the system electrically can serve also as means
it for indicating the positions of the controlled ele
ments (1. e., whether, for instance, an under
respectively.
trolling its movement in retraction and exten
sion. When pressure flow is through either con;
duit 9 or H], as the case may be, return ?ow is
carriage is fully retracted or fully locked down
and thereby set for landing). In preferred con
structions, signal lights are provided in or as
sociated with press-buttons for actuating the
circuit.
‘
In some cases the valve or equivalent means
by Which the receivers are actuated ‘may be car
ried directly by the receivers so that each con
trolled unit may be regarded virtually as an in
The jacks in this case are oper
35 atively connected with the undercarriage for con
40
back through the other, through the‘body of the
valve 1, and along the return conduit [2,
In the arrangement shown the solenoid has two
limit positions one of which it assumes under
spring-loading when de-energised to place the‘
conduit 9 in ‘communication with the pressure
stallation complete in itself ready for connection 45 conduit 5 from the pump l for extension of the
jacks I], When energised the solenoid moves to
to the circuit.
’
~
g
its other‘extreme position to establish communi
It will be evident that placing the control valves
cation between the conduit 5 and the line ‘l0 for
at convenient remote points in the system may
retraction of the jacks.
result in considerable simpli?cation on account
The solenoid 8 is energisable and de-energis
of the fact that it then becomes no longer nec 50
able by means of press-buttons l3 and I4 cou
essary to bring numerous flow and return lines ~'
pled together to ensure that oneis out when the
to a series of valves at the control station; all
other is in. Pressure on the button [3 connects
that is required is electrical connection between
the solenoid to the battery It through the leads
the control station (the pilot’s cockpit in the case
of aircraft), and each, valve, ‘in which caseno 55 I8‘ and I1 for energisation, and pressure upon
2,407,018
3
the other button l4 breaks the circuit and leaves
the solenoid de-energised.
A preferred arrangement of the press-buttons
l3 and E4 in the circuit is illustrated, which en
ables the press-buttons to serve as indicator
means to show the pilot when the undercarriage
is properly set for landing. Accordingly, the
plunger-actuated up switches 18 and down
4
trol simultaneous movement of both jacks, termi
nal position indicator means, means operable only
by movement of both jacks into a terminal posi
tion to energize said terminal position indicator
means, intermediate position indicator means,
means operable during such time as either jack
is in a position intermediate its fully extended
position and its fully retracted position to oper
switches l9 are operated respectively when the
ate said intermediate position indicator means,
undercarriage is locked in the fully-up and fully 10 and means operable by movement of both jacks
down positions, the plungers of the switches being
into terminal positions to deenergize said inter
engaged by the switch-actuating arms 20. The
mediate position indicator means.
plungers of the switches l8 and I9 are spring
2. Control means for a pressure system incor
urged so as normally to project, but are pressed
porating two cooperating double-acting hydraulic
in by the switch-actuating arms 29. The press 15 jacks, and a source of ?uid under pressure, com
buttons I3 and 54 include indicator lights l3a
prising means operable to control ?ow of ?uid
and Ma appropriately illuminated according to
under pressure to move both jacks, terminal posi
the operation involved. The press-buttons are
tion indicator means, means operable only by
therefore formed hollow, having translucent end
movement of both jacks to the same terminal po
panels [31) and Mb, respectively, of which the 20 sition to energize said terminal position indicator
panel l3b is red and Mb green. The press-but
means, intermediate position indicator means,
tons l3 and I4 slide in tubular guides 2| and 22,
means operable prior to both jacks reaching the
respectively, and are connected by the link 23,
same terminal position to operate said interme
swinging about the ?xed pivot 24.
diate position indicator means, and means oper
Let it be assumed that the indications required 25 able by movement of both jacks into correspond
to be given are essentially a green light signal
ing terminal positions to deenergize said inter
through the press-button l4 when the undercar
mediate position indicator means.
riage is locked in the down position and (when
3. Control means for a pressure system incor
extension operation has been initiated) a red light
porating two cooperating double-acting jacks
signal persisting until the undercarriage reaches 30 and a source of ?uid under pressure, comprising
that condition. If now the undercarriage jacks
H are retracted with the aircraft in ?ight, the
arrangement is as drawn with the press-button
I3 in. The solenoid 8 is energised and no lights
are visible, for the circuit through l3a is open at
I8. To lower the undercarriage, the press-button
I4 is pressed in, with the result that the solenoid
8 is de-energised and pressure ?uid flows through
the valve 1, along the conduit 9 to extend the
jacks ll. Immediately the up switches 18 are
released and closed as the actuating arms 20 free
the up switch plungers, and a red light appears
inside the now-projected press-button Hi. When
the undercarriage jacks reach the fully-extended
condition, the undercarriage is locked in the ex
tended position and the double-throw down
means operable in one direction to control simul
taneous ?ow of ?uid under pressure to extend
both jacks, and operable in the opposite direction
to control the ?ow of ?uid from said ?uid supply
source to retract both jacks, jack-extended in
dicator means, means operable only by move
ment of both jacks into fully extended position
to energize said jack-extended indicator means,
intermediate position indicator means, means
operable during such time as either jack is in
other than its fully extended position, whether
in its fully retracted position or intermediate its
fully extended position and its fully retracted
position, to operate said intermediate position
indicator means, means operable by movement of
both jacks into their fully extended positions to
deenergize said intermediate position indicator
switches i9 are reversed in position by the arms
20, so that the red light I3a is extinguished, and
means, and means operable by movement of both
the green light Ma is illuminated inside the press
jacks into their fully retracted positions to de
button It. The throttle switch 25 is actuated 50 energize said intermediate position indicator
by the throttle lever and operates to sound a
means.
buzzer 26 if the throttle is more than two-thirds
4. Control means for an operating system in
corporating two cooperating jacks and jack op-,
closed when the undercarriage is not locked in the
extended position ready for landing. The switch
erating means, comprising means operable to
21 is merely an “on-and-oif” switch so that the
control simultaneous movement of both jacks, in
indicator lights can be turned off when the in
termediate position indicator means, means oper
dicator is not required.
able during such time as either jack is in a po
To retract the undercarriage from the extended
sition intermediate its fully extended position and
its fully retracted position to operate said inter
condition, the press-button I3 is pushed in (there
by projecting the press-button M), with the re 60 mediate position indicator means, and means op
erable by movement of both jacks into terminal
sult that the solenoid 8 is energised and oil passes
positions to deenergize said intermediate position
through the control valve 1 and through the con
indicator means.
duit ID to retract the jacks ll; return oil ?owing
5. Control means for an operating system in
from the jacks, along the conduit 9, back to the
reservoir via conduit l2. Immediately the down 65 corporating two or more cooperating- jacks, and
jack-operating means, comprising means oper
switches I!) are released and reversed, the green
able to effect substantially simultaneous move
light is extinguished and a red light appears at
ment in the same sense of both jacks, an inter
the button l3, but when both jacks II are fully
mediate-position indicator, an extended-position
retracted, the undercarriage is locked in the re
tracted position and the switches l8 open to ex 70 indicator, and a control system for said indi
cators including a ?rst control arranged for op
tinguish the red light.
eration by each jack upon departure from re
What I claim is:
1. Control means for an operating system in
tracted position to energize the intermediate
corporating two cooperating jacks and jack op~
position indicator, a second two-position control
erating means, comprising means operable to con 75 arranged for operation by each jack upon arrival
2,407,618
least one of said second controls being interposed
between the ?rst controls and the intermediate
position indicator, and in the normal position
corresponding to departure from fully extended
position operatively connecting said ?rst con
trols to their indicator, said second controls, in
extended position, to thereby deenergize said
extended-position indicator.
8. Position indicating means for an operating
system which incorporates two or more cooperat
ing jacks or like prime movers, and means to ef
fect substantially simultaneous movement of all
their positions corresponding to fully extended '
position, being connected in series to prevent de
energization of the intermediate-position indi
cator prior to arrival of all jacks in fully ex
tended position.
6
extended-position indicator, and further respon-y _
sive to reenergization of the intermediate-posi
tion indicator upon departure of any‘jack from
at or departure from fully extended position, at
10 jacks between an extended and a retracted posi-
tion; said position-indicating means comprising
a ?rst indicator which indicates arrival of the
jacks in the extended position, and a second in
6. Position indicating means for an operating
dicator which indicates disposition of any jack,
system which incorporates two or more cooperat
ing jacks or like prime movers,‘ and means to ef 15 or all, in any position intermediate the extended
and retracted positions; means responsive to de
fect substantially simultaneous movement of all
parture of any jack, or all, fromretracted posi
jacks between an operative and an inoperative
tion to energize said second or intermediate-po
sition indicator, and further responsive to return
rival of the jacks in the operative terminal po 20 of all jacks to retracted position to deenergize
said intermediate-position indicator; means re
sition, and a second indicator which indicates
sponsive to arrival of all jacks at the extended
disposition of any jack, or all, in any position
position to deenergize said intermediate-position
intermediate the two terminal positions; means
indicator, and to energize said ?rst or extended
responsive to departure of any jack, or all,,from
position indicator.
inoperative terminal position to energize said sec
terminal position; said position-indicating means
comprising a ?rst indicator which indicates ar
responsive to arrival of all jacks at the operative
terminal position to ,deenergize said intermedi
9. Position indicating means for an operating
system which incorporates two or more cooperat
ing jacks or like prime movers, and means to ef
ate-position indicator; and further means re
fect substantially simultaneous movement of all ,
ond or intermediate-position indicator; means
sponsive to arrival of all‘ jacks at the operative 30 jacks between an extended and a retracted posi
tion; said position-indicating means comprising
terminal position to energize said ?rst or opera
tive-position indicator.
.
-
7. Position-‘indicating means for an operating
system which incorporates two or more cooperat
ing jacks or like prime movers, and means to ef
a ?rst indicator which indicates arrival of the
jacks in the extended position, and a second in
dicator which indicates disposition of any jack,
35 or all, in any position intermediate the extended
end retracted positions; means responsive to de
parture of any jack, or all, from retracted po
sition to energize said second or intermediate
tion; said position-indicating means comprising
position indicator, and further responsive to
a ?rst indicator which indicates arrival of the
jacks in the extended position, and a second in 40 return of all jacks to retracted position to deener
gize said intermediate-position indicator; means
dicator which indicates disposition of any jack,
responsive to arrival of all jacks at the extended
or all, in any position intermediate the extended
_ position to deenergize said intermediate-position
and retracted positions; ‘means responsive to de
' indicatonand to energize said ?rst or extended
parture of any jack, or all, from retracted posi
fect substantially simultaneous movement of all
jacks between an extended and a retracted posi
tion to energize said second or intermediate-posi 45 position indicator, said latter means including a
line common’to the two indicators, and alter
tion indicator; means responsive to arrival of all
jacks at the extended position to deenergize said
natively operable switch means therein, to enable
intermediate-position indicator, and responsive,
energization of one or the other indicator, accord
to departure therefrom of ‘any jack to reener
ing to the disposition of the jacks in or out of
extended position, but never both such indicators.
gize said intermediate-position indicator; and
further means responsive to arrival of all jacks
at the extended position to energize said ?rst or
DONALD MACKENZIE.
Документ
Категория
Без категории
Просмотров
0
Размер файла
546 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа