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Патент USA US2407269

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Sept 10, 1945-_
`T. N. HANNANT U
2,407,269
ACTUATOR
k Filed Jan‘. 12, 1944.
Gtkorneg
Patented Sept. 10, 1946
UNITED STATES PATENT OFFICE
2,407,269
ACTUATOR
Theodore Norrìson Hannant, Cedar Grove, N. J.;
»assigner to Specialties Development Corpora
tion, Bloomfield, N. if., a corporation of New
Jersey
Application January 12, 1944, Serial No. 517,923
5 Claims. (Cl. ’i4-_502)
1
My invention relates to `actuators and has as y
one of the principal objects thereof the provision
2
operated position (Figure 3) within the housing
of an actuator so constructed and arranged as to
as hereinafter made apparent.
The pull-knob shaft 8 is formed with a plano
lend itself to fast operation whereby the means
cylindrical intermediate section I4, to provide a
operated thereby is conditioned for performing
fiat face I5 (Figure 2) defined by a pair 0f end
its duty Within a minimum period of time.
shoulders le and which flat face coacts with the
Another object of my invention is to provide a
face of the bore to form a guideway I‘I in which
device of the foregoing described character which
extends the end of a stop-screw I8 carried bythe
is equipped with means for automatically latch
housing and which screw I8 engages the fiat face
ing the device in a predetermined position upon 10 I5 to preclude rotation of the shaft while in non
operation to insure proper functioning of the
operated position and during operation to ex
means operated by said device >and for effecting
tended position. Although the stop screw I8, in
release thereof from said position when desired.
this embodiment of the invention as shown in
Figure 3, is disposed substantially 180° about the
l A further object of my invention is to provide
a device of the foregoing described character 15 axis of the shaft 8 from the detent 2|, the screw
and the detent may be disposed at some other
which is simple in construction, durable in use,
efñcient in operation, easy of assembly, economi
angle about the shaft axis. The end of the inter
cal in manufacture, and which lends itself to high
mediate section IlI, adjacent to the swivel I0, is
productivity.
`
formed with a circumferential groove I9 having
Other and further objects of the invention Will 20 a depth coincident with the depth of the shoul
be obvious upon an understanding of the illus
ders I6 and with a circumferential bottom face
20 merging with the flat face I5 of the shaft.
trative embodiment about to be described, or will
The housing is provided with a spring-pressed
be indicated in the appended claims, and various
detent 2l slidably engaging the peripheral face
advantages ‘not referred to herein will occur to
one skilled in the art upon employment of the 25 of the shaft when in retracted position and which
invention in practice.
Y
seats within the groove I9 to positively latch or
A preferred embodiment of the invention has
lock the shaft in extended position when the shaft
is so operated.
been chosen for purposes of illustration and de
scription and is shown in the accompanying
The housing 6 is mounted on a bracket 25, the
drawing, forming a part of the specification, 30. latter being secured to the control head 26 of a
wherein:
'
high pressure fluid medium container 27. Piv
Figure 1 is a top plan View of an actuator assootally mounted on the bracket, adjacent to the
control head, is a spring-pressed arm 28 having
ciated with the control head of a high pressure
fluid medium container, illustrating an embodi
one end connected to the cable I I and the oppo
35 site end disposed for operating the control head
ment of my invention.
Figure 2 is a cross sectional View of the actua
mechanism in a manner to release fluid medium
tor taken on the line 2-2 of Figure 1.
from the container upon operation of the shaft
Figures 3 and 4 are top plan views, partly in H
8 to extended position. The spring-pressed arm
section, illustrating the actuator in non-operated
23 functions at all times to maintain the shaft,
40 through the medium of the cable, under the in»
and operated positions, respectively.
As illustrated in the drawing, the actuator or
iiuence of its spring, thus, when the shaft is dis
pull-knob assembly 5 comprising a housing or
posed in extended position, the spring-pressed
arm serves to operate the shaft to non-operated
barrel E formed with a longitudinal bore 1 in
which a pull-knob shaft or operator 8 is slidably
or retracted position when the shaft is released
and rotatably mounted. The shaft 8 at one end 45 as hereinafter described.
9 is provided with a swivel It connected to a flex
M W hen the shaft is moved longitudinally by the
ible control head operating member, for instance,
pull-knob to the extended position for operating
a cable I I. The opposite end of the shaft extends
the control head mechanism through the me
into and is fixed to a pull-knob I2 by means of
dium of the cable (Figure 4) the detent 2I en
a pin I 3, the pull-knob being disposed on the out 50 gages one of the side walls of the slot I9 to posi
side of the housing 6 for actuating the shaft t
tively retain the shaft in extended position and
longitudinally within the housing to an extended
to thereby cause the actuator to effect continued
position (Figure 4) and for rotating the shaft
operation of the control head mechanism. When
While in its extended position -to permit vlongitu
the shaft is in this extended or operated position
dinal movement of the shaft to its previous non-` 55 the stop-screw I8 is disposed within the vgrooVe
‘2,407,269
3
4
I9 to permit rotation of the shaft as about to be
described.
nularity by an amount substantially as defined
by a peripherally narrow fiat surface of said shaft
flush with the bottom of said groove and extend
ing from said groove toward the other end of
In order to return the shaft to its initial or
non-operatedv position, the shaft, in this instance,
is rotated about 180° to effect disengagement of
the detent from its positive locking cooperation
with the side Wall of the groove by placing the
said shaft, a handle at said other end, a bearing
for said shaft, a stationary stop in said bearing
cooperating with said flat surface to prevent ro
tation of said shaft in initial position and until
said shaft is moved axially from such position
by a pull on said handle against said bias to a
position in which said shoulder engages said stop,
and a detent in said bearing maintained by said
shaft in retracted position until engagement of
said stop by said shoulder at which point the
detent is movable into said groove for coopera
fiat face I5 at the top of the shaft, as viewed in
the drawing, in which position this face slides
under the detent, until the stop screw I8 engages
the side Wall of the groove which stops further
longitudinal inward movement of the shaft
toward its retracted position. At this time, the
detent is resting on the flat face I5 partially to
the lright of the groove I9. Upon further rota
tion of the shaft for about another 180°, in either
tion with said abutment, said shaft operating
direction, the detent is cammed out of the guide
under said bias when said handle is released to
Way I'I by movement on the shaft from the flat
be disengaged from said stop and to cause said
face I5 to the outer periphery of the shaft, and
abutment to engage said detent, partial rotation
registry of the stop screw with the guideWay I1 20 of said shaft causing said abutment to disengage
is effected, thus permitting the shaft to be longi
said detent and providing for axial movement of
tudinally guided to its retracted position by the
said shaft to place said detent on said flat surface
operation of the spring-pressed arm 28, as here
and said abutment against said stop, and further
tofore described.
partial rotation of said shaft moving said detent
In order to discourage unauthorized operation 25 to retracted position and placing said flat surface
of the actuator and to indicate whether the same
in line with said stop for axial movement of said
has been operated, the bracket 25 and the arm
28 are formed with openings 29 through which
extends a seal wire 38, the ends of the latter being
shaft under said bias t0 initial position.
'
2. In combination, a rotatively and axially
movable shaft having a peripheral groove one
connected together by means of a seal 3 I . When 30 side of which constitutes an annular shoulder
the arm 28 is operated by the actuator the seal
and the other side of which constitutes an abut
of the Wire is broken, thus indicating that actu
ation of the control head mechanism has been
ment of less than complete annularity by an
amount substantially as defined by a peripherally
effected.
narrow flat surface of said shaft extending from
From the foregoing, it will be apparent that 35 the groove along the shaft, a bearing for said
my invention is especially adaptable for use in
shaft, a stop on said bearing cooperating With
connection with fluid pressure medium operated
said flat surface to prevent rotation of said shaft
devices, where it is desired to effect an initial
in initial position and until said shaft is moved
operation of the control head mechanism and
axially from such position to a position in Which
to retain the control head mechanism in oper
ated position to continue discharge of the pres
sure medium for a desired period without manual
manipulation of the actuator. This leaves the
hands of the operator free to attend to other
details. This is particularly advantageous Where
the actuator controls Various emergency devices,
such as flotation gear, emergency bomb bay door
operating equipment or emergency landing gear
mechanism because it enables the operator to
said shoulder engages said stop, and a detent in
said bearing maintained by said shaft in retracted
position until engagement of said stop by said
shoulder at which point said detent is movable
into said groove for cooperation with said _abut
ment, said shaft operating in response to axial
movement thereof toward initial position to dis
engage said shoulder- from said stop and to cause
said abutment to engage said detent, partial ro
tation of said shaft causing said abutment to
Work other controls during an emergency while 50 disengage said detent and providing for ’axial
the actuator controlled device performs its func
movement of said shaft toward initial position
tions.
to place said detent on said fiat surface and said
As various changes may be made in the form,
abutment against said stop, and further partial
construction and arrangement of the parts
rotation of said shaft moving said detent to re
herein, Without departing from the spirit and 55 tracted position and placing said flat surface in
scope of the invention and Without sacrificing
line with said stop to provide for axial movement
any of its advantages, it is to be understood that
of said shaft to initial position. '
`
all matter herein is to be interpreted as illustra
3. In combination, a rotatively and axially
tive and not in any limiting sense.
movable shaft having a peripheral groove -one
It is also to be understood that the following
side of which constitutes an annular shoulder
claims are intended to cover all the generic and
and the other side of which constitutes an abut
vspecific features of the invention herein de
ment of less than complete annularity by'an
scribed, and all statements of the scope of the
amount substantially as defined by a depression
invention which, as a matter of language, might
of said shaft surface extending from the groove
be said to fall therebetween.
65 along said shaft, a stop cooperating> With said
What I claim is:
depression to prevent rotation of said shaft in
1. In combination, control means including a
initial position and until said shaft is movedv
movable arm biased in one direction,.a ñexible
axially from such position to a position in which
element connected to said arm, a rotatively and
said shoulder engages said stop,'a detent main
axially movable shaft, a swivel connection be
tained by said shaft in retracted position until
tween said element and one end of said shaft,
in registration with said groove, and means for
said shaft having a peripheral groove one side
urging said detent into said groove-partial rota
of which next to said element constitutes an an
tion-of said shaft causing said abutment to' dis
nular shoulder and the other side of which con
engage said detentvto placeY said detent in said
stitutes an abutment of less than complete an 75 depression and providing for placing said abut-,.
2,407,269 l
6
ment against said stop, and further partial rota
tion of said shaft moving said detent to retracted
and certain further movement of said member
about said axis moving said detent to retracted
position and placing said depression in line with
said stop to provide for axial movement of said
shaft to initial position.
position and placing said guide in line with said
stop to provide for axial movement of said mem
ber to initial position and providing for placing
4. In combination, a member adapted for move
ment along and for movement about an axis and
having a depression, one side of which transverse
said abutment against said stop.
to said axis constitutes a shoulder and an oppo- ‘
site side of which constitutes an abutment
'
5. In combination, a shaft having a peripheral
groove one side of which constitutes an annular
shoulder and the other side of which constitutes
an abutment, said shaft having a ñat surface
therealong communicating with said groove
through which a guide extends from said depres
through said abutment, a stop cooperating with
sion along said axis, `a stop `cooperating with said
said surface for preventing turning of said shaft
guide to prevent movement of said member about
in an initial position and during axial movement
said axis in initial position and until just before
said member is moved axially from such position 15 of said shaft to just before a final position
wherein said shoulder engages said stop, a detent
to a position in which said shoulder engages said
disposed adjacent to said stop spaced peripherally
stop, and a detent maintained by said member
of said shaft from said stop, and means for urg
in retracted position until engagement of said
ing said detent toward said shaft, said detent
stop by said shoulder at which point said detent
isvmovable into said depression for cooperation 20 being maintained in retracted position by said
shaft until the latter is moved to said final posi
with said abutment, said member being operative
tion whereupon said detent moves into said
to disengage said shoulder from said stop and
groove for cooperation with said abutment.
to cause said abutment to engage said detent,
certain movement of said member about said axis
THEODORE NORRISON HANNANT.
causing said abutment to disengage said detent 25
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