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Патент USA US2133614

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Oct. 18, W38,
G. W. GARDINER
2,133,614
CLOSURE CONTROL
Filed Feb. 2, 1937
2 Sheets-Sheet l
Get. 1s, 19%
G.l W. GARDÍNER
GLOSURE CONTROL
Filed Feb. 2, 1937
-
2 Sheets-Sheet 2
ww fin/._7
Patented Oct. 18, 1938
21,133,614
UNITED STATES PATENT OFFICE
2,133,614
CLOSURE CONTROL
George W. Gardiner, Los Angeles, Calif.
Application February 2, 1937, Serial No. 123,580
18 Claims.
This invention relates to closure controlling
devices and relates more particularly to door
checks. A general object of this invention is
to provide a practical, dependable and readily
5 regulable closure controlling apparatus operable
to govern both the opening and closing move
ments of a door or doors.
Certain types of closures such as sliding ele
vator doors are operated in one direction, say
the opening direction, by a positive power means,
and are operated in the other direction by a
facing and impositive power, such as a spring
means. In other types of sliding closures or
doors the doors are operated in both directions
15 by positive power means such as cylinder and
piston mechanisms or geared electric drives. It
is desirable in many installations to control the
movements of the doors by devices known as door
checks. Door checks having but a single cylin
20 der> and a single control valve have been em
ployed to control elevator doors of the class first
mentionedy above, but in some instances have not
proven satisfactory for the reason that the single
control valve cannot be set to properly control
25 the positive movement of the doors as well as
they may be mounted in side by side relation
and interconnected through their connections
with the door operating mechanism or may be
independently mounted and connected with the
door operating mechanism or the ‘doors whereby Ul
the system is adapted for use in Various instal
lations and with various types of closures and
closure operating mechanisms.
l
Another object of this invention is to provide
a closure control system of the character men
for operatively’connecting the checks or -units
with the door operating mechanism or the vdoors
whereby the actions of the units may be accu
rately related to the movements of the doors to „
effect the desired results.
Another object of this invention is to provide
a closure control system of the character men
tioned in which the checks or units each embody
a valve disc ported to allow for the controlled 20
by-passing of fluid between the high and low
pressure sides of the piston wings during the
door movement whereby the movement resist
ing action of the check varies during diiTerent
stages of the door movement, such variation in 25
the weaker fading movement effected by the
movement being determined or controlled by the
shape and capacity of the ports in the valve
disc.
Another object of the invention is to provide
Another object of this invention is to provide
a closure control or door check system that is
adjustable or regulable to control the movements
of the door or doors in both directions, irrespec
35 tive of whether such movements are effected by a
positive power means or by an impositive spring
means, or both.
Another object of this invention is to provide
a closure control of the character mentioned
4,0 that is compact and capable of use in situations
a closure control system of the character men
and application of the invention, throughout
for the installation of the large single cylinder
type checks.
which description reference is made to the ac
companying drawings, in which:
Another object of this invention is to provide
door movement without jarring the doors by
suddenly offering a marked increase in the re
sistance to the speed of their movements.
Another object of this invention is to provide
a closure control of the character mentioned
that includes two units or checks each capable
of controlling the door movement in one direc
tion and each adapted for individual regulation
5,5 and adjustment, the said units being such that
30
tioned in which the valve discs may be ported
to provide for any desired or necessary action of
the checks or units.
A further object of this invention is to pro
Vide a closure control system of the character
mentioned that assures the smooth controlled
movement of the doors at safe speeds.
The Various objects and features of my inven
tion will be fully understood from the following
detailed description of a typical preferred form
Where there is insufûcient space and clearance
a closure control or door check system of the
character mentioned that resists or controls the
10
tioned embodying practical and effective means
spring means. In some elevator installations of
the second mentioned class of doors there is not
sufficient space for the installation of the single
30 cylinder type of check which is quite large.
5,0
(Cl. 1li-58)
Fig. 1 is a fragmentary elevation view of a
pair of typical elevator doors and a door oper ti5
ating mechanism illustrating the control sys
tem of the present invention operatively con
nected therewith. Fig. 2 is an enlarged verti
cal or transverse detailed sectional view of one
of the units showing the piston at an end of the
stroke. Fig. 3 is a longitudinal detailed sec
tional view of the check unit illustrated in Fig. 2.
Fig. 4 is an enlarged fragmentary end elevation
illustrating the connection between the arm and
the piston shaft. Fig. 5 is a transverse detailed
2
2,133,614
sectional View taken as indicated by line 5-5
on Fig. 3 illustrating the piston at the same end
of its stroke. Fig. 6 is an enlarged View of the
control valve assembly removed from the unit
illustrating the slidable relief valve and the valve
The control system or closure control of the
present invention includes, generally, a check or
unit 30 for controlling the movement of the doors
D in one direction, a check or unit 3l for con
trolling the movement of the doors D in the
seat in longitudinal cross section. Fig. '1 is a
transverse detailed sectional view taken as indi
cated by line 1--1 on Fig. 3. Fig. 8 is a reduced
other direction, and means 32 for operatively
connecting the units 30 and 3| with the doors D
or the door operating mechanism. The two
transverse detailed sectional view taken as in
10 dicated by line 8-8 on Fig. 3 illustrating the
piston at one end of its stroke, and Fig. 9 is a
connected with the doors D by independent
checks or units 3D and 3| may be identical when
means and when connected with the door oper
ating mechanism to have their levers or arms
» move in opposite directions. However, where the
units 30 and 3I are arranged in corresponding
positions, as illustrated, and are both connected
ous types of doors and is adapted to be used« with the same element of, the door operating
mechanism certain of their parts or elements
in connection with'diiîerent types of door oper
bear different relationships to the other parts.
ating mechanisms. In the following detailed de
scription I will describe one typical form of the I will proceed with a detailed description of the
20 invention as employed in connection with the unit 3D, it being understood that such description
View similar to Fig. 8 and illustrating the pis
ton at the other end of its stroke.
The closure control of the present invention
15 is adapted to be employed for controlling vari
mechanism for operating a pair of typical slid
ing elevator doors. It is to be understood that
the invention is not to be construed as limited
or restricted to the speciñc form or application
25 of the invention about to be described but that
it is to be taken as including any features or
modiñcations that may fall within the scope of
the claims.
-
The elevator door installation illustrated in
30 Fig. 1 of the drawings includes two doors D sup
ported for movement toward and away from one
another in a common plane by trolleys I0 oper
ating along a horizontal track II. The mecha
nism for operating the doors D is in the nature
35 of a pneumatic cylinder and piston mechanism
comprising two aligned cylinders I2, a single rod
I3 entering the opposing ends of the cylinders I2
and pistons I4 on the rod I3 operating in the
cylinders.
Conduits I6 communicate with the
40 outer ends of the cylinders I2 to admit the actu
ating air pressure to the cylinders. The conduits
I 6 are under the control of a valve or valve mech
anism I1. 'I‘he present invention is not con
cerned with the details of the valve mechanism I1
45 and its control and the details of these parts are
omitted from the drawings. The means for
operating the doors D further includes a hang
ing lever I8 pivotally supported at its upper end
and carrying a pin I9 cooperating with a buck
50 strap 2D on the outer end of one of the doors D.
A cross bar 2l is pivotally connected with the
lever I8 and extends above the cylinder and pis
ton mechanism to have its outer end pivotally
connected with a lever 22. The lever 22 is piv
55 otally supported between its ends and its lower
arm carries a pin 23 operating in a buck strap 24
on the outer end of the other door D. An oper
ating link 25 connects the lever I8 with the piston
rod I3. In the particular arrangement _illus
60 trated a cross-head 26 is fixed to the rod I3 be
tween the cylinders I2 and one end of the link
25 is pivotally connected with Ythe cross-head.
The other end of the link 25 Vis pivotally con
nected with a bracket or ñtting 21 on the lever I8.
Fig. 1 of the drawings illustrates the pistons
I4 in a position where the levers I8 and 22 are
substantially vertical and the doors D are closed
withy their inner ends in abutment. Upon move
ment of the pistons I4 toward the other endsof
70 the cylinders I2 the levers I8 and 22 are pivotecl
through the medium of the links 25 and 2| to
effect outward movement vor opening of the doors
D. It will be observed that the means for moving
the doors D effects the positive movement 0f the
75 doors in both directions. `
is equally applicable to the unit 3I except for the
changes or differences to be hereinafter de
scribed.
The check or unit 3U provided by the present
invention includes, generally, a cylinder body 33
having two liquid chambers C and a reservoir R,
a wing piston 34 turnable in the cylinder body 33,
and having wings W movable in the chambers
C, means 35 operatively connecting the piston 34
with the doors D or with the means 32, regulable 30
valve means 36 effecting the controlled passage
of ñuid past or around the wings W during move
ment of the same in one direction, means 31 for
by-passing fluid past or around the Wings W dur
ing movement of the same in the said direction
to effect a graduated or increasing pressure resist
ance to their movement and means 38 for freely
passing fluid through the wings W during their
movement in the other direction.
The cylinder body 33 carries the various ele
ments of the unit 30 and provides or deiines the
spaces for the chambers C and the reservoir R.
The body 33 is adapted to be mounted in any
suitable manner and in any convenient or de
sired position. In practice the body 33 may be 45
cylindrical in shape and cup-like to have a cylin
drical side wall 39 and a bottom or inner wall 40.
Lugs or ears 4I may project from the body 33
adjacent its bottom or inner wall 40 to facilitate
the mounting of. the unit 3U. The outer end of 50
the cup-like body 33 is closed by a plug-like part
42. The part 42 is cored or chambered to form
the reservoir R as will be hereinafter described.
A retaining ring 43 is threaded in the outer por
tion of the body 33 to prevent outward movement 55
of the part 42. A shim 44 and a packing ring 45
may be interposed between the part 42 and the
inner side of the ring 43.
In the preferred construction the internal wall
of the body 33 is lined with a bushing 46 which 60
defines the two chambers C. The bushing 46 is
cylindrical in its general configuration and seats
inwardly against the bottom wall 4U to have its
outer end adjacent the inner end of the part
42. The part 42 is urged or clamped inwardly 65
by the retaining ring 43 and its inner end presses
against the outer end of the bushing 46 through
the medium of the valve disc to be hereinafter
described. The bushing 46 is provided with two
diametrically opposite partitions 41 which project 70
inwardly toward the longitudinal axis of the unit
to divide the interior of the bushing into the two
chambers C. The opposite sides of, the partitions
41 may be inwardly convergent as illustrated.
The bushing 46 is held against rotation by pins 75
3
2,133,614
4B seated in sockets 49 in the bottom wall 40 and
extending through axial openings 5|! in the parti
tions 41. One pin 48 may pass outwardly into
an opening 5| in the reservoir part 42 to hold the
same positioned. The internal walls of the bush
ing 46 are cylindrical and accurately ground to
constitute the outer Walls of the piston cham
bers C.
The above described part 42 is provided with
10 an annular groove of substantial fluid capacity
which constitutes the reservoir R. Posts or webs
53 extend through the reservoir R to connect the
opposite end walls of the part 42. The side wall
39 of the body 33 closes the periphery of the
reservoir R. The unit 30 is positioned to have
itslongitudinal axis substantially horizontal and
to have the partitions 41 in a common vertical
plane. The reservoir R and the chambers C are
occupied by suitable liquid such as oil, glycerine
or the like. An opening 54 is provided in the
side wall 39 of the body 33 to facilitate the filling
of the reservoir R. The opening 54 is normally
closed by a plug 55. It is preferred to have an
air space 565L in the upper portion of the reservoir
25 R. Replenishing ports 56 are provided in the
inner wall of the pari'l 42 to communicate with
the lower portion of the reservoir R and to com
municate with the lower portions of the cham
bers C. Check valves 51 are provided in the ports
30 56 to prevent the escape of fluid pressure from
the chamber C to the reservoir R and yet allow
the flow of fluid from the reservoir R to the
chambers when the chambers require replen
ishing.
L: Ul
`
f
Means is provided for automatically bleeding
gases from the upper ends of the chambers C.
Small bleeder ports 58 are provided in an end wall
of the bushing 46 to communicate with the upper
end portions of the chambers C. The ports 58
40 extend to the periphery of the bushing 46 and the
gas that may accumulate in the chamber C is
forced outwardly through the ports 58 and be
68' extending through it f_rom the socket 63 to its
outer end.. The opening 66 contains the principal
parts of the valve means 36 to be hereinafter
described.
`
.
'I‘he wings W of the piston 34 project radially
from the stem 6| to operate or move in the
chambers C. The inner ends of the'wings W slid
ably bear on and seal'against the bottom walls
of the chambers C and their outer ends co
operate with ythe valve disc of the means 31 to be 10.
hereinafter described. The wings W are dia
metrically opposite and their peripheral surfaces
are cylindrically convex to have accurate sliding
cooperation with the outer or peripheral walls of
the chambers C. The peripheral portions of the
wings W may be broadened to have Vrather ex
tensive‘sliding cooperation with the walls of the
chambers. The wings'W are movable between
positions such as illustrated in Figs. 8 and 9 of theA
drawings.
20
The means 35 is provided to connect the wing
piston 34 with a door D or with an element of the
door operating mechanism or with a part other
wise associated with the door D to be moved
thereby. The means 35 therefore may be varied 25,
according to the installation and the manner of
associating the unit 30 with the doors D or with
the door operating mechanism. The invention,
however, contemplates a means 35 that is adjust
able to properly set and relate the check unit 30 30
with the doors D.
The particular means 35 illustrated in the
drawings includes a lever or arm 69 connected
with the projecting end portion of the piston stem
6|. The projecting portion of the stem 6| is 35
polygonal or square and the arm 63 has a corre
spondingly shaped opening 1D receiving the square
portion of the stem. The arm 69 is split having a
slot 1| in its end communicating with the open
ing 10. A clamp screw 12 is arranged through 40
openings in the split or separated portions of the
arm 69 to clamp the arm onto the polygonal por--l
tween the walls of the bushing 46 and the valve
disc to enter an axial groove 59 in the periphery
45 of the bushing 46. The axial groove 59 communi
cates with a similar groove 60 in the part 42 which
in turn communicates with the upper portion of
tion ` of the stem 6|.
packing gland 65 may be provided in the outer
portion of the opening 62 to seal about the stem
6|. An annular groove 66 may be provided in the
70 wall of the opening 62 to carry liquid for lubri
eating the stem and for forming a-liquid seal
about the stem. A port 61 may place the groove
66 in communication with the reservoir R. In
accordance with the invention the piston stem 6|
75 is tubular having a central longitudinal opening
position by nuts 11. It will be apparent how the
effective length of the link 14 may be varied by
loosening the nuts 11V and threading it relative
The screw 12 may be
threaded in the opening in one portion of the split
arm 69 and may have a head engaging against 45
the other portion of the arm. The corners of the
polygonal portion of the stem 6| are provided with
notches 13. The screw 12 is adapted to co
the reservoir R.
v
The wing piston 34 is turnable in the body 33 operate with one of‘these notches 13 to prevent
50 being turned or oscillated by the doors D or the longitudinal displacement of the arm 69 from 50
door operating mechanism. In the preferred con
the stem 6|. It will be noted that the arm 69
struction the piston 34 is integral and includes a may be arranged on the stem and secured thereto
shaft or stem 6| and the two wings W projecting l to project in any selected direction from the stem.
radially from the stem 6|. The stem 6| extends This is important as it allows the unit 30 to be
through a central longitudinal opening 62 in the arranged or mounted in various positions relative
part 42 and turnably engages the inner ends of the to the door operating mechanism or the doors D.
partitions 41. The stem 6| extends centrally
In the application or installation illustrated
through the bushing 46 to have its inner end at the means 35 includes an adjustable link 14 con
the inner wall 46 of the body. A Socket 63 in the necting the arm 69 `of the unit 36 with the lever
60 inner end cf the stem 6| receives a` central boss
I8 of the door operating mechanism. The link 60
64 on the bottom wall 40 which serves as a central
14 is provided at one end with a yoke or clevis 15
izer and bearing for the inner end of the piston pivotally connected with the lever I8 and is pro
34. The stem 6I of the piston extends outwardly vided at its other end with a similar clevis 16
to project beyond the outer end of the body 33. pivotally connected with the arm 69 of the unit 30.
65 Packing means is provided in the part 42 to seal The link 14 is threadedly connected with the 65
about the piston stem 6|. In practice a suitable clevises 15 and 16 and may be locked in adjusted
to the clevises 15 and 16. Variation in the length 70
of the link 14 of course changed the rotative po
sition of the piston 34 relative to the lever I8 and
the doors D and the link may be adjusted to obtain
the proper setting of the wing piston with rela
tion to the ports of the means 31. In the installa 75
4
2,133,614
tion illustrated movementof the lever I8 accom
panying or causing opening of the doors D causes
turning of the arm 69 and the wing piston 34 in
the clock-wise direction indicated by the arrows
A in Figs. 2 and 8 while movement of the levers
I8 accompanying or causing closing of the doors
D effects turning of the .arm 69 and the piston v34
in the counter-clockwise direction.
, y
The means 35 of course operatively associates
10 the arm 69 of the check lunit 3 |~ with the doors D
or the door operating mechanism. It is to be
understood that the arm 69 and the means con
necting the arm 69 with the piston stem 6| may be
identical in both units 30 and 3|. In the arrange
15 ment illustrated the means 35 serves to connect
the units 38 and 3| in tandem, it being under
stood that'the two units may be independently
associated with the doors D or with diiïerent ele
ments of the door operating mechanism, if desired.
A link 18 operatively connects the arm 69 of the
unit 3| with the arm 69 of the unit 30. The link
18 is provided at one end .with a clevis 19 pivotally
connected with the arm 69 of the Aunit 3| and is
provided at its other end with a similar clevis 80
pivotally connected with the arm 69 of theunit 30.
The link 18v is threadedly connected with the
clevises 19 and 10 to be longitudinally adjustable
and nuts 8| are provided to set or lock the clevises
in adjusted position. The effective length of the
30 linkv 18 may be readily adjusted to obtain the
proper setting of the piston 34'of the unit v3|
relative to the ports of the means 31, the doors D
and the operating mechanism for the doors. It
will be observedV that the link 14. and the arm 68
435 of the unit 3D connected with the lever I8 as de
scribed above in effect constitute parts on or con
tinuations of the door operating mechanism so
that the link 19 may be considered as operatively
connecting the arm 69 of the unit 3| with the
40 lever I8. If desired the link 18 may be of suf
ñcient length to extend to the lever I8 to be pivot
ally connected therewith instead of being con
nected with the arm 69 of the unit 30 as illus
trated.
`
The regulable Valve means 36 serves to control
the by-passing of ñuid from the high pressure
sides of the wings W to the low pressure sides
of the wings during the active or movement re
sisting stroke of the wings, whichin the case of
the unit 38 is in a clock-«wise direction indicated
50
by the arrows A. The valve means 36 is normally
constant or uniform in its action but is regulable
or adjustable to offer any desired resistance to
45
the by-pass of fluid around the wings W and,
55 therefore, to offer vany selected resistance to
movement of the wings W. 'I'he regulable Valve
means 36 operates to automatically relieve very
high pressures that may suddenly develop in the
chambers C in front of the wings W.
In accordance with the invention the valve
60
means 36 includes a valve stem or valve body 82
arranged longitudinally in the opening 68 in the
piston stem 6|. The Valve body 82 extends
through the opening 68 with substantial clear
65 ance to leave an annular fluid space in the open
ing. The valve body 82 extends outwardly from
the socket 63 to a point some distance from the
outer end of the stem 6 I. A longitudinal opening
or port 83 enters the valve body 82 from its
inner end where it has communication with the
socket 63. Two longitudinally spaced ports 84
and 85 are provided in the valve body 82 to com
municate with its opening 83. The ports 84
and 85 are in the form of notches cut in the valve
75 body 82 in adjacent relation.
The mouths of
the ports 84 and 85 may extend for slightly less
than 180° at the periphery of the body 82 and
may occupy the same rotative position on the
body.
The regulable valve means 36 further includes a
Valve head 86 cooperating with the valve body
82 to control the port 84 and a high pressure re
lief valve 81 cooperating with the valve body 82
to control the port 85. The head 86 is a tubular
part surrounding and turnably receiving the inner 10
portion of the valve body 82. The Valve head 66
has a flange 88 received in a recess 89 in the
bottom wall of the socket 63. The head 86 is
locked against movement relative to the turnable
piston 34 by a lip 90 which is peened or rolled 15
against its end face as best illustrated in Fig. 3.
A split ring 822L may be sprung into a groove in
the valve body 82 to engage against the inner end
of the head 86. The head 86 has a second flange
9| ñtting the'opening 68 and located in a plane 20
between the spaced parts 84 and 85 in the valve
body 82. An annular groove 92 is provided in the
valve head 86 between the flanges 88 and 9|.
One or more notches 93 are provided in the
flange 9| to place the groove 92 in communication 25
with the opening 68. A port 94 is provided in
the head 86 to place the groove 92 in communi
cation with the port 84 in the valve body 82. The
port'94 has a limited fluid capacity and may be
in the form of a relatively narrow transverse slot 30
as illustrated. The restricted port 94 may be of
the same circumferential extent as the port 84.
' In accordance with the invention the piston 34
is ported to place the socket 63 and, therefore,
thev ports 84 and 85 of the valve body 82, in com
35
munication with the high pressure portions of
the chambers C in front of the wings and to
put the groove 92 of the Valve head 86 in com
munication with the low pressure portions of the
chamber C behind the wings. Two diametrically 40
opposite substantially radial ports 95 are provided
in the piston stern 6| and extend outwardly from
the socket 63 to the periphery of the stem. The
inner ends of the ports 95 communicate with the
socket 63 and, therefore, have communication
with the port 83 and the ports 84 and 85. The
outer ends of the ports 95 communicate with the
chambers C immediately adjacent the forward
sides of the wings W relative to the direction in
dicated by the arrows A. In practice grooves 96
may be provided in the forward sides of the wings
W to communicate with the ports 95 to maintain
extensive communication between the ports and
the chambers C when‘the forward sides of the
wings W approach the partitions 41.
The piston stern 6| is also provided with two
diametrically opposite ports 91 which extend out
wardly from the opening 68 to >the periphery
the stem. 'I'he inner ends of the openings
may 'directly communicate with the groove 92
the valve head 86. The outer ends of the ports
of
91
in 60
91
are at or immediately adjacent the rear sides of
the wings W relative to the direction of move
ment indicated by the arrows A. Grooves 98 may
be provided in the rear sides of the Wings W to 165
communicate with the outer ends of the ports 91
to assure suñicient communication of the ports
with the chambers C when the rear sides of the
wings approach the partitions 41. It will be ap
parent that the ports 95 place ports 84 and 85 70
in communication with the high pressure por
tions of the chamber C in front of the wings W
while the ports 91 place the groove 92 in com
munication with the low pressure portions of the
_chamber C behind the wings W. 1 Accordingly,
5
2,133,614
10
the relatively restricted port 94 serves to control
the ñow between the high and low pressure sides
of the chambers C when the wings W move
through the chambers in the clock-wise direction
indicated by the arrows A. Accordingly, the flow
retarding action and, therefore, the door move
pressure acts on the wall of the groove to slide
or shift the valve 81 outwardly on the valve
ment retarding action of the means 36 may be
varied by changing the fluid capacity or width of
body'82. Such outward movement of the valve
81 places the groove |I3 in communication with
the port 94.
In accordance with the invention the valve
body 82 is turnable relative to the valve head
the opening 68 and, therefore, materially in
86 to govern or vary the extent of communica
tion of the port 84 with the port 94 and, there
fore, govern the movement retarding action of
15 the valve means 36. The means for adjusting or
turning the valve body 82 to regulate the action
of the valve means 36 may include a turnable
stem 99 arranged longitudinally through the out
' er portion of the opening 68. 'I'he stem 99 may
20 be grooved to carry a washer |00 and packing
rings IOI are provided in the opening 68 at op
posite sides of the rings |00. A gland |02 is
threaded in the outer end of the opening 68
to compress the assembly of the packing IOI.
25 A tongue |03 on the inner end of the stem 99
cooperates with a slot |04 in the outer end of
the valve body 82 to transmit turning move
ment from the stem 99 to the valve body. An
indicating finger |05 is provided to indicate the
30 rotative position of the Valve body 82 and, there
fore, indicate the setting of the port 84 relative
to the port 94. The iinger |05 may be carried
by a ñat sided plate |06 fixed to the projecting
end of the stem 99. Y Shoulders |01 may be pro
35 vided on the outer end of the piston stem 6|.
Theshoulders |01 are engageable by the íinger
|05 to limit turning of the stem 99 and the valve
body 82. As illustrated throughout the draw
ings the finger |05 is in an intermediate posi
40 tion where the port 84 has approximately one
half of its circumferential length in communica
tion with the port 94; This relationship between
the ports 84 and 85 is best illustrated in Fig. 2.
The ñnger |05 may be turned to position the
45 port 84 to have full communication with the
port 94 and thereby allow relatively free flow
past or around the wings W so that the means
36 offers a lesser retarding action. The finger
|05 may be moved to the other extreme position
Where
the port 84 is out off or substantially cut
50
oif from the port 94 so that there is an extremely
limited ñow through the ports and, therefore, a
very high resistance to movement of the wings
W in the chambers C.
The relief valve 81 is provided to automatically
55
increase the extent of. communication between
the longitudinal port 83 of the valve body 82 and
body 82. In the event that a high pressure sud
denly develops in the chambers D in front of
the wings W a corresponding pressure, of course,
immediately develops in the groove I|3 and this
creases the extent of communication of the port
83 with the groove 82 and the ports 91. Thus
the valve 81 is operable to automatically relieve
excessively high pressures that may develop in
the chambers C in front of the Wings W. The
spring I I0 automatically returns the valve 81 15
to its normal closed position when the pressures
are reduced to within the normal working range
and normally holds the valve 81 in its closed
position.
The means 31 for
past the wings W of
tant feature of the
acts in conjunction
by-passing iiuid around or 20
the piston 34 is an impor
invention. The means 31
with the above described
means 36 and serves to allow the relatively free
flow of ñuid past the wings W during the initial 25
portions of their movement in the direction indi
cated by the arrows A, to allow a gradually les
sening flow past the wings during the interme
diate portions of their movement, and to allow
little or no flow past the wings W as they ap
30
proach their ñnal phases of movement, there
by providing for a relatively rapid initial door
movement, a progressively slower intermediate
door movement, and a very slow third stage door
movement.
35
The means 31 is' characterized by its simplicityV
and may comprise a single integral valve disc
II4 arranged within the body 33 between the
outer end of the bushing 46 and the inner end
of the part 42. The disc I I4 is positioned to con 40
stitute a wall at the outer ends of the chambers
C and to be slidably engageable by the outer
ends of the piston wings W. Ports I|5F~ are pro
vided in the valve disc I|4 to communicate with
the above described replenishing ports 56. '.I'he 45
disc I I4 isalso provided with an opening II 6a
receiving the pin 48 which projects from the
outer end of the bushing 46. The pin 48 cooperat
ing with the opening ||6a serves to definitely
position the valve disc |I4. The valve disc I I4
may be a plain, flat disc slightly smaller in di
ameter than the opening in the body 33. The
clearance space around the valve disc II 4 main
tains communication Vbetween the ports 58, 59
and 60.
55
In accordance with the invention the disc || 4
has the openings or slots |I5 which constitute
the groove 92 in the event that high pressures ' by-pass ports. In practice there may be two
suddenly develop during any portion of the door
ports I |5 one for communication with each cham
checking stroke of the piston 34. The automatic ber C. The positions or relations of the by-pass 60
relief valve 81 is a tubular member slidable on
ports ||5 with respect to the chambers C are
the valve body 82. The valve 81 has one end identical and the size andshape ofthe ports are
bearing on the outer end of the valve head 86 identical. The ports | I5 are of substantial length
and is positioned to surround or cover the port to have their rear ends adjacent the rear walls
of the chambers C and to have their forward 65
65 85 in the valve body. A spring ||0 is arranged
under compression between a shoulder I I I on the
ends spaced a'short distance from the forward
valve 81 and a washer I I2 iixed to the valve body ends of the chambers. The wings W control
82 to yieldingly hold the inner end of the valve the by-pass ports I|5, that is, the wings extend
81 in sealing engagement with the valve head across the ports to separate the parts ofthe ports
70 86.- An annular internal groove I|3 is provided that communicate with the high and low pres 70
in the reliefvalve 81. The groove ||3 has com
sure sides of the chambers C. The shape and,
munication with the port 85. The outer end therefore, the fluid capacity of the ports I I5 may
wall of the groove II3 forms a face or shoulder be varied to produce any desired by-passing
against which fluid pressure acts tending to move effect.
`
y
¿
75, or slide the valve 81 outwardly on the 1 valve
In the application of the invention >illustrated 75
alsaem'
6
theports H5 each have a rear portion ||6 of
substantial width. The portions H6 may be of
uniform width and, therefore, of uniform fluid
capacity. The rear portions H6 of the by-pass
ports H5 are located to be partially covered by
the wings W when the wings are at or adjacent
the rear ends of their strokes, as illustrated in
vI2| are adapted to cooperate with the seats |22
to prevent the flow of fluid through the ports IZI
when the wings move in the direction indicated
by the arrows A and are adapted to open or
unseat when the wings move in the other direc
tion. When the valves |2| are open or unseated
there is a free ñow of fluid through the ports |20
Figs. 5 and 8. With the wings in this position and, therefore, relatively unrestrained movement
the rear end parts of the large port portions H6 Aof the wings W in the direction counter to the 10
arrows A.
10 are uncovered to the rear portions or low pres
The units 30 and 3| may be identical. How
sure portions of the chambers C. As the wings W
move from this position progressively greater ever, when they are connected with the door
amounts of the port portions H6 are uncovered operating mechanism in the manner illustrated
to the low pressure portions of the chambers C. the unit 30 controls or checks opening movement
of the doors D while the unit 3| checks or controls 15
15 In the embodiment of the invention illustrated closing
movement of the doors. Thus the unit 30
the' by-passV ports H5 each have a tapered inter
mediate portion II'I. The intermediate portions checks or controls the clock-vvise turning of its
II‘I of the by-pass ports are relatively long to be arm 69 while the unit 3| controls or checks the
counter-clock-Wise movement of its arm 69. The
controlled by the wings W during the maj or inter
3| may be identical with the above described 20
zo mediate parts of their movements. The rear ends unit
of the port portions I I'I may be of the same width unit 30 except that the valves of the means 38
as the rear portions H6 while their forward ends face or seat in the opposite direction, the ports
are relatively narrow. This forward reduction in
capacity of the port portions H1 is preferably
gradual, that is, the portions II'I are of increas
ingly less width as they continue forwardly rela
tive to the direction of the arrows A. The by-pass
ports H5 further include reduced forward end
, portions H8. The port portions I I8 are porpor
30 tioned to permit a very limited by-pass of fluid
around the wings W between the high pressure
and low pressure portions of the chambers C. In
practice these reduced forward portions I I8 of
the by-pass ports may be graduated in width or
capacity to have extremely narrow forward end
parts. The by-pass ports H5 are located in the
valve. disc H4 to be governed by the straight
sides of the wings W.
It is believed that it will be apparent how the
40 rear portions H6 of the by-pass ports operate to
by-pass a substantial volume of iiuid around the
wings W during the initial movements of the
Wings in the direction indicated by the arrows A
to allow a relatively rapid door movement. The
intermediate portions I I‘I of the by-pass ports are
shaped to by-pass increasingly smaller volumes of
fluid around the wings W as the wings move
through the intermediate portions of their stroke
to effect a gradual reduction in the rate of move
ment'of the doors D. The reduced and graduated
forward portions H8 of the by-pass ports H5
are >proportioned to by-pass quite limited volumes
of fluid between the high pressure and low pres
sure portions of the chamber C as the wings W
approach their final positions to cause a marked
reduction in the speed of the doors D as they
approach their ñnal positions.
The wings W
may, of course, continue to move after cutting off
the reduced forward portions I I8 of the ports I I5
60 in which case the means 36 forms the sole means
for by-passing fluid between the high and low
pressure portions of the chambers C.
The means 38 is provided to allow the free
by-pass of fluid through the wings W during
65 movement of the wings in a direction counter to
thearrows A. The by-pass means 38 is in the
nature of a check valve means and includes a port
|20 in each wing W and a ball check valve I2|
in each port |20.
'I'he ports |20 connect the
95 and 91 are reversed in position and the ‘oy-pass
ports H5 are reversed in position relative to the
chambers C. 'I‘he valve disc H4 of the unit 3| 25
may be identical with the valve disc H4 of the
unit 30 except that it is turned side for side to
effect a reversal of position of its ports H5. The
operation of the two units 30 and 3| is the same
except that one checks door movement in one 30
direction and the other checks door movement in
the opposite direction.Y Accordingly, I will de
scribe the operation of the unit 30 illustrated in
detail in the drawings and will then describe
the manner in which the checks or units 30 and
3| control the doors D.
In operation let it be assumed that the arm
69 of the unit 30 is in the position where the
wings W are in the positions illustrated in Figs.
2 and 8. Upon opening of the doors D, the lever 40
I8 through the medium of the link ‘I4 swings the
arm 69 in clock-wise direction. This, of course,
moves the wings W in the direction indicated by
_the arrows A. During this movement of the Wings
W the fluid or liquid in the chambers C in front
of the wings is, of course, subjected to compres
sion. The fluid under pressure in front of the
moving wings W escapes through the ports 95
into the socket 63 and then passes through the
ports 83, 84, 94 and 91 to flow into the low pres 50
sure portions of the chambers behind the wings
W. As described above the port 94 is restricted
and serves to control or retard this flow of fiuid
from the high pressure to the low pressure sides
of the chambers C. 'I'he valve body 82 may be 55
set in any selected rotative position by means of
the finger |05 so that its port 84 has only partial
communication with the control port 94. In this
case the by-pass fiow of fluid from the high pres
sure sides of the chambers is further retarded or 60
controlled. Thus the means 36 serves to offer a
uniform but regulable resistance to the by-pass
of fluid between the high and low pressure por
tions of the chambers C and thus operates to re~
65
strain the movement of the doors D.
When the wings W start to move in the direc
tion indicated by the arrows A from their initial
positions progressively greater parts of the rear
portions H6 of ports H5 communicate with the
low pressure sides ofthe chambers C and the 70
70 high pressure and low pressure portions of the
chambers C. Seats |22 are provided on the walls
of the portsV |20 and the valves |2| are adapted to
engage against the seats. Cages or pins |23 are
wings W move forwardly over the port portions
II'I’ which are of gradually diminishing fiuid
provided _to prevent the loss or escape of the
valves |2| from the ports |20. The balls or valves
sure sides of the chambers C at the lstart of the
capacity. ' 'I_'hus the ports H5 may allow a rela
tively free by-pass of ‘fluid from the high pres
2,183,614
wing movement and progressively smaller vol
umes of ñuid as the wings move forwardly. The
lay-passing of substantial volumes of fluid around
fand proportioned to provide for any desired rate
of Icy-passing of fluid past the wings W during
the initial and intermediate phases of movement
the wings W during the initial stage of their ' of the wings W and during the movement of the
movement of course allows a relatively rapid wings as they approach their final positions. In
movement of the Wings W and a correspondingly this regard it is to be noted that the ports II5
rapid movement of the doors D. As the wings W may be formed to by-pass the fluid in a manner
continue to move forwardly they move across the to provide for a relatively rapid initial movement
gradually diminishing portions II'I of the by
10 pass . ports II5 so that gradually diminishing
amounts of fluid are by-passed around the wings
W. Accordingly, the movement of the wings W
is gradually retarded and the movement of the
doors D is gradually reduced. .Thus by the time
the wings W approach the final portions of their
movements they may be moving at a relatively
slow rate. When the wings W move across the
reduced forward portions I I 8 of the by-pass ports
II5 quite limited Volumes of fluid are allowed to
20 pass around the Wings W through said ports so
that an increasingly high pressure builds up in
the forward portions of the chambers C to retard
movement of the wings W and the doors D.'
When the forward sides of the wings W pass the
25 forward ends of the by-pass ports H5 the ports
are, of course, cut olf from the high pressure
portions of the chambers C and there is no fur
ther by-pass of fluid through these ports. This,
of course, further reduces the rate of movement
30 of the wings W resulting in an increase in pres
sure in the high pressure portions of the cham
bers C. As the wings W continue to move for
wardly after passing the forward ends of the
ports I I5 the valve means' 36 forms the sole
35 means for by-passing fluid around or past the
wings W. Accordingly, as the means 36 is oper
able to permit only a limited by-pass of fluid the
final movements of the wings W are greatly
restrained to produce a very slow final door move'
40
ment.
'
When the arm 69 of` the unit 30 is turned in a
direction counter to the arrows A during closing
movement of the doors D the piston wings W are
moved in the counterclockwise direction in 'the
45 chambers C'. During this movement of the wings
W the valves I2I open to allow the relatively free
passage of fluid through the ports |20 and, there
fore, allow free or unrestrained movement of the
wings W and relatively free movement of the
50 doors D.
Fluid may also flow through the means
36 and 31 during the door closing movement.
In the arrangement or installation illustrated',
the units 30 and 3I face in the same direction
and are connected in tandem, that is, the arms
55 69 of the two units are both connected with the
lever I8 by the link 14. Because of this arrange
ment the unit 30 is operable to .control or restrain
opening movement of the doors D' andthe unit
3| is operable to control or restrain closing move
60 ment ofthe doors D. The operation of the check
unit 3|] has been described above. The opera
tion of the unit 3| is similar or identical except
that its parts are related so'that it restrains or
controls the turning of its wings W in the coun
65 ter-clockwise 'direction and, therefore, controls
the closing movement of the dòors D.
'
It is apparent that the'units 3U and 3I may be
individually or >independently adjusted and regu
lated to effect the desired regulation of both the
70 opening and closing movements of the doors D.
The regulable valve means 36`of theunits may be
set or adjusted to provide for any selected rate of
by-'passing the fluid around or past the wings W
during the active strokes of the Wings, while the
75 ports II5‘in the valve discs `II4 may be shaped
of the doors, a gradually lessening movement of
the doors during their intermediate movements, 10
and a slower movement of the doors as they
approach their final positions. With the ports
2 I 5 formed as illustrated, the final movements of
the doors D are controlled by the valve means 36,
that is, the ports II5 are cut off during the ñnal 15
movements of the doors so that a high pressure
develops in front of the wings and is only relieved
by the passage of iiuid through the means 36.
As the means 36 is adjustable or regulable the
iinal movements of the doors D may be adjusted
as desired.
The control or system of the invention includes
the two independently regulable and adjustable
units 30 and 3I which may be independently set
to provide for the desired control of both the 25
opening and closing movements of the doors D.
Thus in theA installation illustrated, where the
doors D are operated in both directions by a pos
itive power means, the units 30 and 3I may be
adjusted to permit a rapid opening of the doors 30
and a slow closing of the doors or vice versa.
In other installations where the movement of the
doors in one direction is effected by a spring
means of fading strength, one ofthe units 30 or
3| may be regulated to compensate for this ac
tion of the spring means and provide for the
desired movement of the doors D. It will be
noted that the units 30 and 3| are relatively
small so that they may be installed in situations
where there is limited space and clearance. Fur
ther, the two units 30 and 3I `being independent
ly adjustable are capable of independent con'
nection with the doors D or the door operating
mechanisms and may be separately mounted in
any convenient locations. The units 30 and 3| 45
are such that they may be mounted to have their
arms 69 project in variousV directions and their
arms 69 may be set in various rotative positions
with respect to the'wings W. The attachment of
the arms 39 to the square or polygonal portions
of the piston stem 6I provides for this regulation 50
or setting of the arms 69.
Where the units 3i! and 3I' are separately or
independently mounted or where thev units 30
and 3| are connected with different elements of 55
the door operating mechanism they may be iden
tical and yet control both the opening and clos
ing movements of the doors. For example, in
the door operating mechanism illustrated, one
unit may have its arm 69 connected with the 60
lever 22 at one side of its pivotal axis while the
arm- 69 of the other unit may be connected with
the lever 22 at the other side of its axis. In such
an installation the two units 30 and 3I may be
identical and yet control both the opening and 65
closingniovements ofthe doors.
v
Having described only a typical preferred form
and application of my invention, I' do- not wish
to-be limited or restricted to'the specific details
herein set forth, but wish to reserve to myself 70
any variations or modifications that may appear
to those skilled inthe art or fall within'the scope
lof the following claims.
_
Having described my invention, I claim:
' 1. Inßa door operating mechanism, a member
75
8
2,133,614
`movable in opposite directions, a unit connected
with the member governing the speed of its
movement in one direction and checking its lflnal
.movement to the end of its stroke in said »direc
6:1 tion, and a unit connected with the member to
govern the speed of its -movement in -the 'other
direction and operating to check its `final move
ment to the end of its stroke in said other `direc
tion.
2. vIn a door operating mechanism, a mem
ment of the saine’in one -direction 'to voffer .differ
ent degrees of , resistance to movement of the
piston during different .portions of the stroke,
and valve means on >the piston for freely passing
fluid through the piston during movement of the
same in the opposite direction.
7. A control for controlling a door system, hav
ing a part associated with a door to move in op
posite directions, said control including, a unit
connected with said part and operable to re 10
ber movable in opposite directions, a unit con
strain its movement in one direction, and a sepa
-nected with the member governing the speed of
its movement throughout the major portion of
its travel in one direction and checking its ñnal
rate unit connected with said part and operable
to restrain its movement in the other direction,
each of said units including a body having two
chambers, a piston movable in each of said cham 15
bers and connected with said part, means for
by-passing ñuid past the pistons during move
movement to the end of its stroke in said direc
tion, and a unit connected with the member to
govern the speed of its movement throughout the
major portion of its travel in the other direc
tion and operating to check its movement at the
20 end of its stroke in said other direction, each
unit including regulable means.
3. A control for controlling a door system,
having a part associated with a door to move in
opposite directions, said control including, a unit
25 connected with said part and operable to re
strain its movement in one direction during
opening movement of the door, and a separate
unit connected with said part and operable to
restrain its movement in the other direction dur
ing closing movement of the door, each of said
units including regulable means operable to re
strain movement of said part in one direction
during a flnal phase of movement of the door.
4. A control for controlling a door system, hav
35 ing a part associated with a door to move in op
posite directions, said control including, a unit
connected with said part and operable to restrain
its movement in one direction, and a separate
unit connected with said part and operable to
40 restrain its movement in the other direction, each
ment of the same in one direction to offer a sub
stantially uniform resistance to their movement,
means for by-passing ñuid past the pistons in 20
different amounts during different portions of
their movement in said direction to offer differ
ent degrees of resistance to their movement dur
ing said portions of their stroke, and valve means
for by-passing fluid through the pistons during 25
movement of the pistons in the other direction.
8. A control for controlling a door system, hav
ing a part associated with a door to move in op
posite directions, said control including, a unit
connected with said part and operable to restrain 30
its movement in one direction, and a separate
unit connected with said part and operable to re
strain its movement in the other direction, each
of said units including a body having a chamber,
a piston movable in said chamber and connected
with said part, means for by-passing fluid past
the piston to offer a substantially uniform re
sistance to its movement throughout movement
of the piston in one direction, means for regulat
ing the ñrst mentioned means, means for by 40
of said units including means offering substan
tially uniform resistance to movement of said
part in one direction throughout its entire range
of movement in said direction, and means offer
ing resistances of diiferent magnitudes to move
ment of said part in the same direction during
different phases of its movement.
5. A control for controlling a door system, hav
passing fluid past the piston in different amounts
during diiîerent portions of its stroke in said di
rection to offer different degrees of resistance to
its movement during said portions of its stroke,
and means for freely by-passing fluid through
the piston during its movement in the other di
ing a part associated with a door to move in op
ing a part associated with a door to move in
posite directions, said control including, a unit
connected with said part and operable to restrain
opposite directions, said control including, a unit
connected with said part and operable to restrain
its movement in one'direction, and a separate
unit connected with said part and operable to
restrain its movement vin the other direction, each
of said units including two elements one being 55
movable relative tothe other, one of said ele
ments being a body having a chamber, the other
element being a piston in the chamber, regulable
means for by-passing fluid past the piston to
offer resistance to relative movement between the 60
elements in one direction, valve means on the
its movement in one direction, and a separate
unit connected with said part and operable to
restrain its movement in the other direction, each
55 of said units including a body having a chamber,
a piston movable in said chamber and connected
with said part, regulable means for by-passing
ñuid past the piston during movement of the
same in one direction to offer substantially uni
60 form resistance to movement of the piston
throughout its entire movement in said direc
tion, and means for by-passing fluid through the
piston during its movement in the other direc
tion.
6. A control for controlling a door system,
having a part associated with a door to move 1n
opposite directions, said control including, a unit
rection.
9. A control for controlling a door system, hav
piston for freely passing ñuid through the piston
during relative movement between the elements
in the other direction, and separately adjustable
means for connecting the movable elements of
the units with said part.
10. A control for controlling a door system,
connected with said part and operable to restrain
having a part associated with a door to move in
its movement in one direction, and a separate
oppositeV directions, said control including, a unit
connected with said Vpart and operable to re
70 unit connected with said part and operable to
restrain its movement in the other direction, each
of said units including a body having a chamber,
a piston movable in said chamber and connected
with said part, means for by-passîng fluid past
75 the piston in varying quantities during move
strain its movement in one direction, and a sepa
rate unit connected with said part and operable
to restrain its movement in the other direction,
each of said units including two elements one
`being movable relative to the other, one of said 75
2,133,614
Ul
elements being a body having a chamber, the
other element being a piston in the chamber,
regulable means for by-passing fluid past the
piston throughout relative movementl between
piston in diminishing amounts during a substan
tial phase of said relative movement to offer in
creasing resistance to said movement.
the elements in one direction to offer a substan
scribed, two elements related for relative turning
movement, one a body having a fluid chamber,
tially uniform resistance to said movement, and
means for by-passing fluid past the piston in
different quantities during the different phases
of said relative movement, and independently
10 adjustable means operatively connecting the
movable elements of the units with said part.
11. In a door control of the character de
scribed, two elements related for relative turn
ing movement, one a body having a fluid cham
15 ber, the other a piston in the chamber, means
for by-passing fluid past the piston during rela
tive movement between the elements in one di
rection to offer substantially uniform resistance
to said movement, and means for by-passing ñuid
20
9
15. In a door control of the character de
the other a piston in the chamber, means for by
passing fluid past the piston during relative
movement between the elements in one direction
to offer substantially uniform resistance to sa1d
movement, and means for by-passing fluid past
the piston in diminishing amounts during a sub
stantial phase of said relative movement to oiîer
increasing resistance to said movement, the last
mentioned means including a valve part having 15
a port controlled by the piston.
16. In a door control of the character de
scribed, two elements related for relative turning
past the piston in diminishing amounts during
movement, one a body having a fluid chamber,
the other a piston in the chamber, means for 20
a substantial phase of said relative movement to
offer increasing resistance to said movement.
12. In a door control of the character de
movement between the elements in one direction
scribed, two elements related for relative turn
ing movement, one a body having a fluid cham
ber, the other a piston in the chamber, and means
for by-passing fluid past the piston in diminish
ing amounts during a substantial portion of the
relative movement between the elements in one
30 direction to offer increasing resistance to said
movement.
v
13. In a door control of the character de
scribed, two elements related for relative turn
ing movement, one a body having a fluid cham
35 ber, the other a piston in the chamber, means for
by-passing fluid past the piston in diminishing
amounts during a substantial portion of the rela
tive movement between the elements in one di
rection to offer increasing resistance to said
40 movement, and means providing for relatively
free passage of fluid between the opposite sides
of the piston during relative movement between
the elements in the opposite direction.
14. In a door control of the character de
scribed, two elements related for relative turning
movement, one a body having a fluid chamber,
the other a piston in the chamber, means for by
passing fluid past the piston during relative
movement between the elements in one direction
to offer substantially uniform resistance to said
movement, said means including a regulable valve
operable to vary the rate of such by-passing of
fluid, and means for b-y-passing fluid past the
by-passing fluid past the piston during relative
-to oiïer substantially uniform resistance to said
movement, said means including a relief Valveoperable to increase the rate of such by-pass of 25
fluid if high pressures develop in front of the
piston, and means for by-passing fluid past the
piston in diminishing amounts during a substan
tial phase of said relative movement to offer in
30
creasing resistance to said movement.
17. In -a door control of the character de
scribed, two elements related for relative turn
ing movement, one a body having a fluid cham
ber, the other a piston in the chamber, and
means for by-passing fluid past the piston in di 35
minishing amounts during the succeeding stages
of relative movement between the elements 1n
one direction to effect a relatively rapid initial
stage of movement, a slower intermediate stage
of movement, a still slower third stage of move
ment, and a still slower final stage of movement.
18. In a door control of the character de
scribed, two elements related for relative turn
ing movement, one a body partitioned to have
two fluid chambers, the other a piston having 45
a wing operable in each chamber, means oper
atively connecting one element with a part of
the door system, and a valve disc in the body
extending across an end of each chamber, said
disc having ports controlled by the wings for by 50
passing fluid past the wings during relative move
ment between the elements.
GEORGE W. GARDINER.
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