Патент USA US2559198

July 3, 1951
c. NORTON ETAL
2,559,197
4 RELEASABLE MANUAL CONTROL
2 Sheets-Sheet 1
Filed Aug. 4, 1945
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July 3, 1951
c. NORTON ErAL
2,559,197
RELEASABLE MANUAL CONTROL
2 Sheets-Sheet 2
Filed Aug. 4, 1945
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Patented July 3, 1951
UNITED STATES PATENT OFFICE
2,559,197
RELEASABLE MANUAL CONTROL
Calhoun Norton and Philip O. Hooker, Chicago,
Ill., assignors to Arens Controls, Inc., Chicago,
Ill., a corporation of Illinois
Application August 4, 1945, Serial No. 608,980
15 Claims. ( C1. -’i4-_503)
1
2
This invention relates to `control mechanisms,
and particularly to control mechanisms of the
manually actuated type, adapted for push-pull
movements, and to be locked in various positions
of longitudinal adjustment by means of a prede
termined rotational movement of the manual
control handle.
Fig. 6 is a View similar to Fig. 3, but illustrating
a modified embodiment of the invention;
Fig. 7 is a View also similar to Fig. ’3, but illustrating a further modified embodiment;
Fig. 8 is a partial longitudinal sectional view of
a control mechanism, generally similar to that
It is an object of the invention to provide a
control mechanism, of the type deñned, of im
illustrated in Figs. 1-5, but incorporating certain
additional structural elements;
Fig. 9 is a transverse sectional view of the
proved construction and improved operating 10 structure of Fig. 8, on the line 9---9 thereof;
Fig. 10 is a View of the parts shown in Fig. 9,
~
More particularly stated, it is an object of the
in released or unlocked position;
Fig. 11 is a view similar to Fig. 8, but showing
invention to provide an improved control mecha
a still further structural embodiment of the in
nism of the type defined, which may be more
readily fabricated and assembled, which is 15 vention;
Fig. l2 is a transverse sectional view >of the
smooth and free in its longitudinal movements,
which provides a positive lock when moved to
structure of Fig. 11, on the .line >I2---I2 thereof;
Fig. 13 is a view similar to Fig. l2, but showing
locking position, and which may be more readily
the parts in locked position; and
adjusted to locked and unlocked condition.
Fig. 14 is a view, similar'to Fig. 12, but showing
A further object of the invention is to provide 20
a further modíñed formof structure.
an improved control mechanism of the type de
Referring more specifically to the drawings,
fined, wherein a positive locking thereof is in
and Vñrst to the structural embodiment illustrated
sured, when desired, regardless of severe operat
in Figs. 1-5, the structure shown comprises a
ing conditions or factors to which the mecha"
nism may be subjected such, for example, as Vi 25 control mechanism, generally indicated 'by the
numeral l0, adapted to effect the actuation of a
bration, moisture, dirt, or other foreign matter,
controlled device or member I2 through the inter
et cetera.
mediaryof a flexible control cable, generally indi
A still further object of the invention, in cer
characteristics.
cated by the numeral I4. More specifically, the
tain embodiments thereof, is to provide an im
proved control mechanism, of the type defined, 30 control cable comprises a composite shiftable
structure, comprising a .core wire I6 and an em
wherein the locking action is effected only upon
bracing Wire coil I8, shiftable as a unit within
rotation of the manual control handle in a pre
a sheath coil 20. 'The shiftable control structures,
determined rotational direction.
comprising the parts I 6 and I8, are connected
Various other objects, advantages and features
of the invention will be apparent from the fol 35 at one end to the controlled device in the form
of the bell-crank lever I 2, these parts being con
lowing specification, when taken in :connection
` nected >at their other yend to the control mecha
with the accompanying drawings, wherein cer
nism I0 in a manner so as to be longitudinally
tain preferred embodiments are set forth for pur
reciprocable through a predetermined range of
poses of illustration.
In the drawings, wherein like reference numer 40 travel, or releasably locked from movement, as
may be desired.
als refer to like parts throughout:
The above described flexible transmission cable
Fig. 1 is a general assembly view of a control
and operated device set forth one illustrative use
installation incorporating a control mechanism
of the control mechanism, presently to be de
constructed in accordance with and embodying
45 scribed. It is to be understood, however, that
the principles of the invention;
Fig. 2 is a longitudinal sectional view, on an
the control mechanism of the `invention may be
employed in any suitable control installation,
requiring shiftable movement within a predeter
mined range of travel, coupled with the releasable
Fig. 3 is a transverse vertical. sectional view, on
a further enlarged Scale, of the structure of Fig. 50 locking of the operated parts in any selected posi~
enlarged scale, of the control mechanism of
Fig. 1;
tion, as may be desired.
2, and taken as indicated by the line 3_3 thereof;
Fig. 4 is a view similar to Fig. 3, but showing
the parts in locked condition;
Fig. 5 is an exploded View of certain parts of
in the embodiment shown comprises a frame
sleeve 22 adapted to be fixed to a panel or other
the control mechanism illustrated in Figs. l.-4;
suitable support 24, by means of >a pair of Vnuts
As best shown in Fig. 2, the control mechanism
2,559,197
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4
26 and 28 screw threaded onto the end of the
frame sleeve. The panel 24 may, for example,
the locking cam 48 is rotated into locking posi
tion, by a predetermined rotary movement of the
operating handle 36 (approximately 120° in the
be the dashboard of a vehicle or the like on which
the control installation is carried.
The end of
the sleeve 22, remote from the panel board, is
suitably secured to the ñxed sheath coil 20 of
particular embodiment illustrated), as shown in
Fig. 4, the holding or locking roller is thrust into
engagement with the surface of the ñxed frame
sleeve, and this in turn forces the operating
sleeve and frame sleeve into frictional engage
ment, for example as indicated at the point 58,
the flexible cable transmission by means of a
collar or pressed ñtting 3û.
Slidable within the frame sleeve is an operating
member in the form of an elongated sleeve 32.
One end of this operating sleeve is suitably se
cured, as by means of swedging'or the like, to
the end of the shiftable coil I8 of the transmission
thereby frictionally locking the operating sleeve
cable, the arrangement thus being such that
upon longitudinal shifting of the operating sleeve
32 within the frame sleeve 22, longitudinal re- .
to the frame sleeve, against longitudinal move
ment. The Vdegree or magnitude of the locking
action is dependent upon the degree of rotation
and force imparted in turning the control han
dle, either a relatively light frictional resistance,
or a substantially positive locking action being
ciprocative movements are imparted to the cable
provided at the option of the operator depending
parts lli-I8, whereby to effect the movement or
upon the degree or” turning movement and force
operation of the controlled bell-crank member I2.
imparted. When the parts are in locked position,
The opposite end of the operating sleeve 32 has 20 as shown in Fig. 4, they are so proportioned so
swivelled engagement with the hub portion 34
as to be self-holding, viz., the cam projection 48
of a control handle 36. Any suitable swivelled
and holding roller 50 are wedged into engagement
connecting means may be provided, a screw
so that they remain in engaged and locked posi
threaded connection being conveniently em
tion, after the operator releases his grip upon
ployed, as shown. It will be noted that the end
the control handle' 36. As previously indicated,
of the sleeve 32 is not completely seated into the
the spacing between certain of the parts is shown
threaded socket within the control handle hub
on an exaggerated scale in Figs. 3 and 4, so as to
portion, an end space being provided as indicated
illustrate the locking action.
at 38, so that the control handle may be rotated,
t will be seen that by reason' of the construc
for a purpose later to be described, without im- ' tion provided, a readily made and easily fabri
parting corresponding rotation to the operating
cated structure is provided, which when released?
sleeve. However, the threaded connection in
is smooth and free in operation, but which can
sures that longitudinal movements imparted to
be readily moved into locking position, to pro
nthe control handle will be correspondingly trans- . . vide either a predetermined fricticnal resistance
mitted to the operating sleeve and associated
to movement or a positive locking action, holding
transmission cable structure. In order to pre
the operating sleeve against longitudinal move
vent rotative movements of the operating sleeve
mentl as may be desired. ' The operating sleeve
32, the frame sleeve is provided with a suitable
may be locked in position at any point within its
inwardly struck lug or detent, as indicated at 40,
range of travel. When once locked it will remain
this lug projecting into a longitudinal slot or
in locked condition, notwithstanding vibration or
spline 42 provided in the operating sleeve mem
the like to which control installations of the type'
ber.
shown are frequently subjected over extended
A control Shaft 44 is disposed within the oper
periods of time.
ating sleeve, for rotative movements therein, and
Particular attention is directed to the function
for longitudinal shifting therewith. One end of
of the sleeve 32, in insuring an invariable and
this shaft is received into the hub portion of the
reliable locking action. More particularly, the
control handle, and is suitably fixed therein as
sleeve 32, While longitudinally shiftable, is con
by means of a pin 4S. The other end of the ‘ stantly
held in a predetermined angular position,
control shaft is formed on its end with a cam
and against rotation, by means of the spline con
member or projection 48, as perhaps best shown j,
nection ¿til-42. Inasmuch as the holding element
in Fig. 5. The projection 48, in the particular
50 is mounted within the opening 52 of the oper
embodiment shown, is circular, but is eccen
ating sleeve, the holding element is likewise con
trically positioned in respect to the axis of rota
strained against circumferential shifting in re
tion of the control member, so that as the control
spect to the internal surface of the nxed frame
member is rotated, the cam member 48 will be
sleeve. Accordingly as theV control shaft fili is ro
shifted in an orbital path or circumferentially
tated, resulting in the circumferential displace
within the sleeve 32. The normal or unlocked
ment of the cam projection ¿i8 into locking posi
position of the cam projection 48 is illustrated
tion, it is insured that the desired locking action
in Fig. 3. The locking position of the projection
will take place in direct proportion to the de
is illustrated in Fig. 4.
,
The cam projection 48 cooperates with a hold 60 gree of rotation imparted to the control handle.Y
More particularly, the locking roller 56 is not per
ing'element 50'in the form of a roller member,
mitted to slip circumferentially of the frame
this roller member being loosely held within an
sleeve, as the cam projection ¿i8 is moved, such
opening 52 provided in the operating sleeve, and
as might otherwise occur due to vibration, dirt,
adapted to be thrust by the cam projection into
or an inverted condition of the structure, as may
engagement with the internal surface 54 of the
result for example in an aircraft installation. A
fixed frame sleeve member.
positive and reliable locking action is insured at
h When‘the -parts are iin unlocked position, as
all times and >under all conditions of operation.
lllustrated in Fig. 3, the roller member 5l) is >free
from the surface of the frame? sleeve, and lies 70 The control handle 36, being firmly fixed to the
control shaft 44, provides a positive operator
loosely upon the operating cam or projection 48,
therefor. The screw threaded connection be
as shown. Accordingly, with the parts in such
cond1tion, the operating sleeve 32 is freely shift
'able within the frame sleeve, as indicated on an
exaggerated scale by the space 55, Fig. 3. When
tween the control handle and the operating sleeve
Y 32 insures that the operating sleeve will `be prop
erly longitudinally shifted as the control handle
_ is actuated in a. longitudinal direction, While at
’2.155.595.1.29fî'
5
16
the same time .permitting the cont-rol handle to Ibe
rotated to effect the -locking actionl without im
parting corresponding rotary movement to the
the bell is retracted sow/that it is not -ensaeeable
like between the operating sleeve andthe ñexible
sure that the »ball does not engage the .spring
transmission cable or other device to be oper
convolutions so long as ,the control mechanism
with the l_spring convolutions. Inasmîuch ¿as the
-ball `is held Aby the opening in the non-rotatable
.operating sleeve. Inasmuch as the operating
operating sleeve, _in _a position vertically .above
sleeve does not rotate, a swivel .connection or the 5 .the `cam member, the action of gravity will >in
ated, is not required.
remains -in the vupright position illustrated.
-In the embodiment illustrated in Figs. _l-5,
Also Yin `the structure of Figs. 8-10, the control
heretofore described, a locking action is ‘imparted „1.0 shaft Mc ¿is extended beyond the operating cam,
upon a predetermined rotation of _the _control
for example as indicated at 63, whereby to pro
handle from its normal or unlocked position, in
vide a further ‘bear-ing surface for the control
either rotational direction. In certain instances
it may be desired to permit a locking rotational
member -within the operating sleeve.
movement of the control handle only in one di
_In Figs. 1_1-13, a still further form of structure
:1.5 is illustrated., omitting the intermediate operat
rection. Suitable arrangements for effecting this
result are illustrated in Figs. 6 and '7. The struc,
ture illustrated in Fig. 6 is the same as that previ
ously described, the parts being shown in un~
locked position corresponding to Fig. 3, except
that in this instance the cam projection, as in
dicated at 48a, is provided with a transversely
extending pin 6_0; the arrangement thus being
such that the cam projection can be rotated
into locking position in only one direction, viz., -_
counterclockwise in the structure shown.
In Fig. '7 the structure likewise is similar to
that previously described, except that the cam
projection as indicated at .Mib is in this instance
'provided with a lip portion 62 performing the
function of the pin 60, viz., precluding rotation
of the cam projection into locking position in
more than one direction of movement.
In Figs. 8, 9 and 10 a further structural em
bodiment is illustrated. In this instance the
structure is also generally similar to that shown
in Figs. 1-5, except that the internal surface of
the frame sleeve is provided with a, helical screw
thread, providing a more positive locking action
as in some instances may be desired; and the
ing sleeve. In this instance the frame sleeve 22d
is secured by means of the nuts 23d and 26d
to the panel 24d, as in the embodiments Áprevi
ously described, t-he end of the frame sleeve being
secured to the sheath .coil 20 of the control cable.
-The operating means for the cable parts |.6.-..-!8
in this instance .comprises an operating member
1.0 longitudinally slidable and also rotatable with
in A.the frame sleeve, under control of a handle
’l2 pinned to the end of the operating mem-ber
or shaft lli. A collar lll is pinned to the shaft
to limit its movement in .one direction, to the
right, as shown in Fig. 1l. The end of the shaft
is connected by means of a, swivel connection `to
thecontrol cable LIB-.Itl through the intermediary
of a ball TB secured to the end of `the shaft, and
a fitting 18 swedged onto the end of the shift
able Acable I8.
The combined operating and locking control
shaft 10 is provided with a cam. portion 80 oper
able .to thrust `a locking roller 182 into engagement
with the internal surface of the fixed frame
sleeve, when the shaft is moved from unlocked
position as shown in Figs. 1-1 and 12 to locked
40 position as shown in Fig. 13. The locking en
holding element or roller is of specifically differ
ent shape, viz., in the form of a ball.
>More specifically, it will be seen that in this
instance the internal bore of the frame sleeve »22o
is enlarged in respect to the longitudinally re
gagement between the cam and roller thrusts
»the Yroller into frictional vengagement with the
Vsurface of the frame sleeve, and simultaneously
lthrusts the shaft lll into engagement with the
ciprocable operating sleeve 32C received thereby,
swivel connection between the shaft 'I0 and the
a helical spring as indicated at S4 being disposed
control cable permits the rotational move-ments
of the shaft without imparting corresponding
rotational movement to the transmission cable
structure.- As will be clear, the .control shaft 1l)
may _be shifted to various longitudinal positions
internally of the _frame sleeve and forming the
sliding surface within which the operating sleeve
is reciprocable. The spring member may be sat
isfactorily secured within the bore of the frame
sleeve by copper plating the frame sleeve bore,
and also copper platine the Spring member- The
serine member ie then inserted inte position. and
frame sleeve, to provide the locking action. The
under actuation by the handle '12, to effect the
actuation of the operated mechanism; or locked _
in any _adjusted position upon a predetermined
the composite structure subjected to the heating 5.5 rotational movement of the .control handle and
eetien of e .furneee in .e hydrogen atmosphere. " .Shaft structure.
whereby to effect the brazing of the spring to the
In Fig. 14 an embodiment is illustrated the
frame sleeve bore, forming them into an integral
unit. When mounted in position, the spring
member in effect forms an internal _helìçal screw
same as that shown in Figs. ll, 12 and 13 .except
_that _in `this instance the frame sleeve as indi
cated at 23e is provided with a out away or trough
three-d Within the here Off the fixed .iramesleeve
portion 34 extending the length of the sleeve for
The parts are shown in locked position in Figs.
8 .and 9, and in ¿Telfënâed 01.' lllfllQCked position in
Fig. 10. The holding roller is in thev form of _a
ball Si which is thrust. .as the cam ¿te is moved
receiving the locking roller as indicated at 82e.
into locking position. between the fixed convolu
tions of the spring member _54 and into engage
ment with the Íinternal surface 54e of the frame
sleeve. whereby te leek the parte. in position- The
fined convolutions _of the helical spring provide
The parts are shown in unlocked position in Fig.
'14, and it will be noted that the space between
the locking roller 32e and the cam portion Bile
of the locking .control shaft is slightly less than
rthe depth of the groove 5.4i. Accordingly even
when the parts are in unlocked position the lock.
.ing roller .cannot move out or the trough 34.
The trough therefore holds the locking roller in
positive abutments interengageable with the
locking ball which, as stated, may in certain in
stances be desired to provide a more positive lock.
ing or holding action. When the parts are in _un
position at all times, and as the cam portion
80e is moved into engagement with the locking
roller, as the locking control shaft is rotated, a
.leelsed er released position, .as `shown in Fig. .1.9,
„9.5 the .Structure .of .F.ies.. .17.5. previously described.
positive lock-.ine action is insured as in the ease
2,559,197
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`It is obvious that various changes may be made
in,~- the specific embodiments set forth for pur
poses of illustration Without departing from the
spirit of the invention. The invention is accord
ingly not to be limited to the specific embodi
ments shown and described, but only as indicated
in the following claims.
The invention is hereby claimed as follows:
sleeve and adapted to be connected to a device
to be controlled, a control handle operatively
connected to the operating member for effecting
its actuation, and locking means including a roll
element and a cooperative cam member for re
leasably locking the operating member from
movement in respect to the frame sleeve, said
control handle being freely rotatable to move
said cam member in an orbital path to effect,
l. A control mechanism comprising a frame
member, an operating member longitudinally re 10 the actuation of the locking means.
7. A control mechanism comprising a frame
ciprocable with respect to the frame member and
member, an operating member longitudinally re
adapted to be connected to a device to be con
ciprocable with respect to the frame member
trolled, a control handle operatively connected to
and adapted to be connected to a device to be
the operating member for effecting its actuation,
controlled, a control handle operatively con
-and locking means including aY freely mounted
nected to the operating member for effecting
roll and a cooperative symmetrically formed cam
its actuation, and locking means including a
surface for releasably locking the operating mem
freely mounted roll and a symmetrically formed
ber from movement in respect to the frame mem
cooperativercam member for `releasably locking
ber, said locking means being controlled by a
the operating member from movement in respect
rotary movement of said control handle.
to the frame member, said locking means being
2. A control mechanism comprising a frame
controlled by an orbital movement of said cam
Vmember, an operating member longitudinally re
member, and means for holding the holding ele
ciprocable with respect to the frame member and
ment from circumferential movement With the
adapted to be connected to a device to be con
trolled, a control handle operatively connected 25 cam member.
8. A control mechanism comprising a frame
to the operating member for effecting its actua
member, an operating member longitudinally re
tion, and locking means including a freely
ciprocable with respect to the frame member and
mounted roll and a symmetrically formed coop
adapted to be connected to a device to be con
erative cam surface for releasably locking the
trolled, a control handle operatively connected
Aoperating member from movement in respect to
to the operating member for effecting its actua
the frame member, said cam surface being moved
tion, and locking means including a freely
in an orbital path by a rotary movement of said
mounted roll and a circularly formed coopera
control handle to effect the actuation of the
tive cam surface for releasably locking the op
locking means.
_
'
3. A control mechanism comprising an elon 35 erating member from movement in respect to
the frame member, said locking means being
gated frame sleeve, an elongated operating mem
controlled by a rotary movement of said control
ber longitudinally reciproca'ble within the frame
handle, and means operable in all positions of
sleeve and adapted to be connected to a device to
adjustment of the operating member for holding
be controlled, a control handle operatively con
the holding element in a predetermined radial
.nected to the operating member for effecting its
position in respect to the aXis of reciprocation
actuation, and locking means including a freely
of the operating member.
mounted roll and a symmetrically formed cooper
9. A control mechanism comprising an elon
ative cam surface for releasably locking the oper
gated frame sleeve, an elongated operating mem
ating member from movement in respect to theY
frame sleeve, said locking means being controlled 45 ber longitudinally reciprocable Within the frame
by a rotary movement of said control handle.
g sleeve and adapted to be connected to a device
to be controlled, a control handle operatively
4. A control mechanism comprising an elon
gated frame sleeve, an elongated operating mem- '
connected to the operating member for effecting
ber longitudinally reciprocable Within the frame
its actuation, and locking means including a rollV
sleeve and adapted to be connected to a device 50 element and a cooperative cam member for re
leasably locking the operating member from
to be controlled, a control handle operatively con
nected to the operating member for effecting its
movement in respect to the frame sleeve, said
actuation, and locking means including a roll
control handle being freely rotatable to move
element and a symmetrically formed cooperative
said cam member in an orbital path to control
cam surface for releasably locking the operating 55 the actuation of the locking means, and means
member from movement in respect to the frame
for holding the roll element in a predetermined
sleeve, said cam surface being moved in an orbital
radial position in respect to the axis of recip
path by a rotary movement of said control han
rocation of the operating member.
dle to effect the actuation of the locking means.
l0. A control mechanism comprising an elon
5. A control mechanism comprising a frame 60 gated frame sleeve, a shiftable sleeve disposed
‘memben an operating member longitudinally re
Within the frame sleeve and longitudinally mov
ciprocable with respect to the frame member and
able therein, a freely rotatable control handle
operatively connected to the shiftable sleeve for
adapted to be connected to a device to bercon
trolled, a control handle operatively connected
effecting its actuation, a control member dis
'to the operating member for effecting its actua
posed Within the shiftable sleeve and movable
tion, and locking means including a freely
relative thereto by a rotary movement of said
' mounted roll and a cooperative cam member for
releasably locking the operating member from
control handle, and locking mechanism compris
ingV a freely mounted roll and a symmetrically
formed cooperative cam surface actuated by the
movement in respect to the frame member, said
control handle being freely rotatable to move 70 relative movement between said shiftable sleeve
said cam member in an orbital path to effect
and said control member.
the actuation of the locking means.
ll. A control mechanism comprising an elon
»6. Ak control mechanism comprisingran elon
gated frame sleeve, an elongated operating -mem
gated frame sleeve, a shiftable sleeve disposed
Within the frame sleeve and longitudinally mov
-ber longitudinally reciprocable Within the frame 75 able. therein, a. freely rotatable control handle
2,559,197
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operatively connected to the shiftable sleeve for
a control member disposed within the operating
effecting its actuation, a control member dis
sleeve, said control member also being operatively
posed within the shiftable sleeve and movable
connected to the control handle, and locking
relative thereto by a rotary movement of said
mechanism operated by a rotary movement of the
control handle, and locking mechanism actuated Ul control handle for releasably locking the operat
by the relative movement between said shiftable
ing sleeve to the frame sleeve, said locking mech
sleeve and said control member, said locking
anism comprising an orbital circularly shaped
mechanism comprising a freely mounted lock
cam formed on the control member and a locking
ing element actuated by a symmetrically formed
roll shifted thereby through an opening in the
cooperative cam surface on the control member, 10 operating sleeve into engagement with the frame
said locking element being shiftable through an
sleeve.
opening in the shiftable sleeve into engagement
14. A control mechanism as defined in claim
with the frame sleeve.
13, wherein the frame sleeve -is provided with a
12. A control mechanism comprising an elon
series of longitudinally spaced abutments en
gated frame sleeve, a sleeve disposed within the 15 gageable by the locking roll to provide a positive
frame sleeve and longitudinally movable therein,
locking action.
means for holding the operating sleeve from ro
15. A control mechanism as defined in claim
tary movement, a freely rotatable control handle
13, wherein the frame sleeve is provided with a
operatively connected to the operating sleeve for
spring member forming a helical screw thread
effecting its actuation, a control member disposed 20 engageable by the locking roll to provide a posi
within the operating sleeve, said control member
tive locking action.
also being operatively connected to the control
CALHOUN NORTON.
handle and shiftable within the operating sleeve
PHILIP O. HOOKER.
by a rotary movement of the control handle, and
a freely mounted locking element operable 25
REFERENCES CITED
through an opening in the shiftable sleeve by a
The following references are of record in the
symmetrically formed cam surface on the control
Ille of this patent:
member into engagement with the frame sleeve
UNITED STATES PATENTS
by the relative movement between the shiftable
sleeve and the control member.
30 Number
Name
Date
13. A control mechanism comprising an elon
Booty ____________ __ Apr. 5, 1927
1,623,616
gated frame sleeve, an operating sleeve disposed
Shakespeare ..... __ Feb. 1'7, 1942
2,273,334
within the frame sleeve and longitudinally mov
Cobb ____________ __ May 15, 1945
2,375,894
able therein, said operating sleeve being adapted
FOREIGN PATENTS
to be connected to a device to be controlled, means 35
holding the operating sleeve from rotary move
ment, a control handle operatively connected to
the operating sleeve for effecting its actuation,
Number
502,490
Country
Date
Great Britain ____ __ Mar. 20, 1939