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Патент USA US2405821

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Aug, 13, E946.
mam
' w. D. FÍEïRRIl's ETAL
GARAGE DOOR EQUIPMENT
Filed sept'. a, 19,41
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BY:
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/ lNvENToRâV ~
Aug, 13,1954,
w. D. FERRls ETIAL.
v.
GARAGE DOOR EQUIPMENT
,
Sept. 8I
j
2 Sheets-gheet 2
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A.
BY: .
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INVENTORS
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2,405,821
Patented Aug. 13, 1946
UNITED STATES PATENT OFFICE
2,405,821
GARAGE DOOR EQUIPMENT
William D. Ferris and Cecil R. Wolf, Sterling,
Ill., assignors to Frantz Manufacturing Co.,
Sterling, Ill., a corporation of Illinois
Application September 8, 1941, Serial No. 410,028
12 Claims. (Cl. 20-19)
1
This invention relates to closing and opening
means for doors of the type generally known
as garage doors, although the invention is of
broader application where peculiarly adaptable
therefor.
and thereafter yields to let the door continue
at a slowed down pace to full open position, and
at which time an absolute check is provided
for preventing the door going past full open po
sition, said last mentioned positive door check
Among the objects of the present invention
is to provide closing and vopening means'for
garage doors of the rigid door type, wherein the
door is substantially vertical when closed, and
being constructed in such a manner that the
said track means, and wherein’ the door is pro
vided with a pair of arms pivoted thereto, the
tween the door and the jamb; to provide an ad
checking and the complete stoppage of the door
is accomplished without deforming the door
check itself; to provide a door check for a door
in substantially horizontal overhead position 10 of the foregoing character which has four func
tions, to-wit, checking the s-peed of the door,
when open, and wherein the frame forming the
stopping the door, preventing the door rolling
openings for the doors is provided with more or
outwardly again after being stopped in open
less horizontally disposed track means and the
position, and lastly to maintain clearance be
door is .provided with rollers adapted to run on
opposite endsl of said arms being pivoted to» Sta
tionary anchorages fixed to the side frame of
the door on two suitable stationary brackets
justment for this arm holding means so that
it may contact the arms with sufficient pressure
to produce the necessary friction for deadening
the tendency of the door to rebound when the
arm strikes the stop; to provide a pivotal con
nection between the swinging lever of the door
and the bottom of the door whereby all binding
between the door and jamb is eliminated and
the smooth rolling of the door wheels in the over
necting the door with the door frame so as to
prevent the door from opening too far and more 25 head tracks is assured, and whereby there is
included also the perfect positioning and locating
speciiically to provide means for holding such
of all the important pivotal points in the door
pivoted arms when they are in the open over
hardware and its proper operation and action
headv position whereby to prevent the door from
is effected; still another object of the present
opening too far; to provide, in association with
invention is to provide a door of the foregoing
30
a door of the one-piece type, means for auto
construction which provides substantially per
matically swinging the door from a closed vertical
fect positioning of the arm lever pivots, the over
position to an open overhead position imme
head track and the upper and lower weather
diately the door is unlocked, and wherein a door
strips so as to allow substantially perfect free
checking means is provided to act in coopera
dom of door action, and in addition to provide
tion with the swingable pivoted lever which piv
means which in association with the pivotal con-V
otally connects the lower portion of the door
nection of the lever arm with the lower portion
with a bearing on a stationary abutment, where
of the ,door whereby in the closed position of
in the means operates on the lever to ñrst check
the door the weight of the door is removed from
the momentum of the moving door as it moves
to open position whereby to slow down the door, 40 the lever arm and applied solely to the over
head track mechanism, and alternatively which
and thereafter positively prevents further move
pivotal connection in the open overhead posi
ment of the door beyond a predetermined po
tion of the door is arranged so as to maintain
sition, and in addition provides means to prevent
the door in full open position and prevent it
the door rolling lback out of the opening after
lit has once reached full open position; to pro 45 from rebounding or moving outwardly toward
downward closed position; to provide means
vide a device of the foregoing nature which when
tending to prevent any binding action at the
properly adjusted assists in guiding the levers
so-called breaking point of the door when the
of the door and the door s0 that there will be
door is operated; to provide means to prevent
. no contact between the door and the door jamb
or restrain the movement of the arm relative to
during the opening and closing movements of
the connection at the outer end of this arm with
the door; to provide a door check for a door of
the door when the door is in open overhead po
the foregoing character formed of spring metal
sition, while at the same time permitting the
and bent in such a manner as to provide a snub- .
within the enclosure formed by the door frame.
In this type of door it is the object of the
present invention to provide a door stop holder
adapted to engage the pivoted arms intercon
weight of the door to be carried by the track t
bing portion for slowing down the momentum
of the door as it approaches full open position 55 and roller means and not by the arms when the
2,405,821
3
4
door is in closed position; to provide in a door
of the foregoing character an arrangement of
horizontal overhead open position when the door
provide suñicient force to start the door out
wardly and upwardly automatically when the
spring catch holding the door in closed position
is released, whereby the opening position of the`
door is substantially automatic and whereby this
so-called self-starting movement in the opening
The outer rear face of this bracket carries a
mounting member 26 secured thereto by means
is unlatched. This means comprises a pair of
spring and lever construction so that the arm
brackets I8 which are secured as at 20 to a
or lever is located with relation to the spring
metallic
reenforcing weatherstrip 22 `rigidly
when the door is in closed position so as to 5
mounted on the vertical frame 24 at and slightly
overlying opposite sides of the door opening.
of the door will eliminate the uncertainty of
of the bolts 28, which mounting is provided with
an outwardly extending bearing 30 in which is
rotatably mounted a short pivotal pin 32, on one
the door openingtoo fast or too slow as in the
case when it is required to manually lift upon
lever 34 and to the opposite end of which is
the door te give it its initial opening movement;
to provide a simple type of stop mechanism for
~ lever arms 3,4-and136. are arranged to swing with
end of which is pinned a relatively long arm or
pinned aÀ relatively short lever or arm 36.
The
the turning of the pivotal pin 32 as the latter
rotates
in its bearing 30. In short, as the lever
and to provide in association therewith a snub»
34 swings upwardly with the turning of the pin
bing action to prevent rebounding of the door
its-bearing 36, the short arm 36 likewise swings
after the door- hits the st_op during the comple 20 in
an equal number of degrees.
limiting the extreme opening position ofthe door
tionof the opening movement; to Iprovide these
and other objects of the invention as will be
apparent from a perusal of the following speci
ñcation, takenin-connection with the accom
panying drawings, wherein;
,
Means is provided for pivotally connecting the
k
Figure 1 is a vertical sectional view taken on
the line». l-I of Figure 2,v showing the door` in
closed position ;„_ _
VFigure 2V is Aan inside view of the door taken
on line 2-2 of Figure 1;
,Figure A»3
a ,vertical- sectional view showing
the _door in open position ;A
30
of the lever or arm 34 is adapted to slide in the
slot 46. When the door is in lowered position
the arm 34 does not contact the lug 48. How
ever, when the door is in open overhead position
the arm 34 will contact this lug 48 for a purpose
,
>lí‘igure 4 is a perspective View of the operating
mechanism when the door is in closed position;
YFiguregö is a, perspective view of the operating
mechanism when the door is in open position;
Figure 6- is a perspective view of the right-hand
hereinafter made evident.V
A relatively longv coil spring 52 has one end
thereoffastened by means of a pin 54 to the
outer end of the short arm 35 and the opposite
endY of the coil spring 52 is provided with an
anchorage 56 engaging a rod 58 which passes
through an inclined portion 66 of a bracket fas
tened to the frame member 24. The upper p0r
-tion of this bracketY is provided with a substan
lower bracket which interconnects the outer end
of the pivoted arm or lever and the door;
Figure '7> is a plan section taken on line 'I-'I
of Figure 5;
Figure 8 is a detailedsection view taken on line
8-8 o_f Figure 4;
Figure >il is a. detailed section View taken on line
B_Sof Figure 8;
,
ReferringY now toA the drawingsl in detaiL, the,
invention is illustrated in connection with, an
enclosure _of any desired type, preferably a garage
havin-g a frame 2 providing an,opening„the. roof
of the garage being shown atA 4. At the: -topthe
garage is> provided with tracks S which are pref
erably inclined downwardly from front to rear
for the;y purpose of eliminating the. tendency of
the,v door to come back slightly after it reaches
the complete overhead position., The door. agis
preferably vof «therigid one-piece type and is
adapted> when Closed to be inA substantially ver
tical position ¿with respect to theframe opening
as_shown- in Figures 1 and 4, and to be in sub
stantially overhead openV position, as shown in 60
Figures 3 and 5.
The upper front corners of thev door are pro
vided.Y with a- bracket l0 which carries an angu
larly disposed ear I2k on which is pivotally
mounted as at i4 a roller I6 adapted to run in
the track 6._ It is understood that there are
rollers on each side of the door and tracks on.
each side ofthe door frame whereby the upper
rear opposite corners of the doorare supported
by the track 6l ,
In cooperationwith the tracks 6 andthe rollers
I6„ are provided means for pivotally supporting
the vdoors so as automatically to cause them to
swing from the substantially vertical closed posi
tion upwardly and outwardly toa substantially
outer end of the long lever 34` to the door 8.
This means comprises. the bracket 46 shownv in
Figure 6. This bracket is preferably formed
L-shaped and comprises a flange 42 adapted to
be fastened to the door by means of screws or
the like and a right-angle ilange 44 having an
elongated slot 46 and a laterally extending lug
48 projecting from thefree edge of the flange 44.
A pivotal pin 50 connected to the outer end
tially horizontal face or ledge 64,_ through which
the free end of the rod 58 passes.
A nut 66
adjustably holds the rod 58 with respect to the
bracket, whereby the tension o_f the spring may
be adjusted. The vertical stationary member 62
is a part of the doorwayv frame.
Means is provided in association with the arms
34 for checking the speed of the door as it ap
proaches full open position, and for thereafter
absolutely stopping the door at full open position,
for preventing the doorroliing reversely or out
wardly and downwardly towards closed position,
and for maintaining clearance between the door
and the door jamb. YIn the door construction
forming the subject matter ofy this invention the
levers of the arm till and the spring means are so
disposed as to cause the door to open automati
cally when the latch is released without the op
erator giving the door a preliminary outward or
lifting movement. ' Due to the fact that the pres
ent construction is devised so that the door will
automatically open when once unlatched, the ef
fectiveness of the lever and the spring power for
holding the door in open position is somewhat
sacriñced.
Therefore to hold the door in open
k overhead» position and to prevent its rolli'ngy back
because of the reduced spring power and leverage
at the open position, a door check mechanism is
used which cooperates in a multifold manner with
the lever mechanism to _produce a plurality of
results. The. check means not only supplies a
2,405,821
5
6
the che-ck which provides a positive resistance
for preventing the door going past full open posi
tion and the shape of the entire door check and
the speed and momentum of the door as it reaches
its construction is important for it is the closed
open position, as well as to positively check fur
ther. movement of the door after the speed of DI end shape of the door check which is contacted
by the arm, and therefore because of the bent end
movementof the door has been reduced. In ad
shape of the door check the arm cannot spring
dition, the door’check, when once properly ad
the flexible door check out of the way and con
justed, assists in guiding the arm levers and the
tinue, but is stopped quite firmly. at this point.
door so that no Contact is possible in open posi
Thus if the door action is abrupt enough the door
tion between the door andthe door jamb. It is
check actually does spring away some, but the
practically impossible to obtain rigidity enough in
end of the door check which is bent over to hold
the arm levers and the bearing to obtain such
the arm lever also pulls the arm lever with it so
results without the door check, and the door check
that even a very violent action of the door is
accomplishes these results Very easily. The door
holding means to prevent the door'rolling backv
out of the open position, but also acts to lchange
check means comprises a bracket 16 having a 15 brought under control bythe very flexibility built
into the door check and without causing the door
check to be bent out of shape.
The spring power at this point is without 1e
verage because of the pull required of the spring
tionary frame of the door or any other fixed sup 20 to start the door opening and hence there is no~
tendency of the spring to pull the door back to
port. >The outer end of this bracket is bent for
closed- position when in this position, shown in
wardly to provide a friction surface 14 and is also
-Figure 4. On the contrary, by reference to Fig
provided with a somewhat angularly bent holding
ure 8, which represents the closed position of the
portion 16 which terminates in an angularly dis
door, it will be seen that the center of the pin
posed flange 18 to receive the arm 34. This
54 in the closed position of the door is to the
bracket is preferably formed of resilient metal
left of a vertical line 9-9 passing through the
and is arranged so that as the arm swings up
center of the pin 32 and the pin 54, whereby the
wardly the arm is adapted to engage the portion
spring which is connected around the pin 54 and
14 and force the same laterally with suflicient
pressure to produce friction, which thus deadens 30 which is constantly under tension in this position
is always tending to open the door. Therefore,
the tendency of the arm to rebound when the arm
as soon as the usual latching means on the door
strikes the usual door stopping member. By lat
is unlatched, this spring is immediately operative
erally adjusting this bracket 10, the friction pres
automatically to raise the door to overhead open
sure may be adjusted to control this deadening
position
and as the door approaches extreme open
effect.
‘
position, as shown in Figure 5, .the spring itself
The door ycheck means thus not only supplies
slotted outer end 1l for adjustable attachment
to the framework of the door, the adjustment
being accomplished by means of a suitable bolt 12
passing through the slot and engaging the sta
a holding means to prevent the door rolling back
out of the opening, but also acts to check the
speed and momentum of the door as it approaches
the open position. In this connection it is de
sired that the shape of the door check is of par
will assume a contracted position and will not be
under tension sufficiently to tend to move the
l door downwardly again.
It will be noted that the angularly disposed
portion'18 of the check definitely forms a stop
for the upward position of the arm 34 to limit
ticular construction. For instance, by reference
the overhead position of the door.
'
to Figure 7 it will be seen that the portion 14
It will also be noted by reference to Figure 1
on the door check contacts the arm lever 34
more severely than at the balance of the straight 45 that in the closing and then in the closed posi
tion of the door the pin 5G ris sequentially in the
portion of the check as at 16 in Figure '1. After
central portion of the slot 46 of the bracket 42
the arm levers, because of momentum, have
on the door and then in the bottomrnost end of
forced their way past the point 14, the arrn levers
the slot respectively in either of which positions
cannot return past the high point 14 on the door
check. In addition, the door check is made so 50 the weight of the door is not borne by the arm
34. Thus, in the closing and closed positions,
that it has a substantial flexibility of action so
as not only to permit the high portion 14 to be
the weight of the door is carried on the roller
shifted laterally so as to permit the arm 32 to
move therepast, but valso so that when the arm 34
i6 and on the track 6.
strikes the pocket in the stop portion 18 the im
pact will be taken up in the resiliency of the
spring metal arm or bracket as a whole.
I
However, in _the open or overhead position of
the door this same slotted arrangement is dis
posed in conjunction with the lug 48 so that as
the lever 34 swings to upward position as shown
in Figure 3 the left edge of the lever will contact
In ad
dition the slot 1i in the door check provides an
the lug 48 so as to prevent or restrain the move
easy method of adjusting the severeness of en
gagement between the door check and the lever 60 ment of the pin 5t in the slot when the door is
in overhead position, retains the pin in the right
arms 34.
hand end of the slot 46 as >shown in Figure 3,
Furthermore, the door checks, when properly
which is the upper end of the slot when :the door
adjusted, tend to guide the arm levers and door
is in closed position. This prevents the door from
so that no contact is possible in open position be
again moving or rebounding outwardly beyond
tween the door and the door jamb. This func
the position shown in Figure 3 toward closed posi
tion of the door check is accomplished very easily
tion by limiting and preventing movement of the
as otherwise it would be nearly impossible to ob
door to the left in Figure 3 relative to the pin 50
tain rigidity enough in the arm levers and their
on the upper end of the arm 34. The slot and
bearings to obtain such results. When the arm
lever moves into the door check with suñicient 70 pin connection between the door and the lever
34 also prevents any binding action at the break
force that it reaches the end 18, as shown in
ing
point when the door is operated.
Figure '1, the arm encounters a positive resistance
preventing the door going back beyond predeter
mined open position. The shape of the door
check is important for it is the closed end 18 of
75
The main, purpose of the slotted plate 44, in
cluding the slot 46 and the lug 48 is to allow
proper operation and action Aof the hardware,
2,405,821
For instance, it` isf` virtually impossible to obtain.A
an absolutely perfect. positioning ofthe pivot 32'
of-‘the ann lever 34, the pivots 50„the overhead
track, the upper weatherstrip t0, and the lower
weatherstrip or vsteel' stop 22 so asto allow per
fect freedom of door action. The location of all
these points must be exact, and in the present
construction it cannot be done because the main
bearing or pivot 30 of the arm lever must be
positioned inwardly away from the door jamb 24
so that the short lever arm 3S> may clear the
door jamb asA the arm. swings arcuately. Con
sequently if an ordinary hole or aperture were
8
as'. the door. approaches said stopmeans‘, whereby
to effect'` a preliminaryy snubbing or dampening
action on the movement of said arm assaid arm
approaches extreme door opening position, said
latter portion being shiftable out ofthe path of
movement. of said; arm. to permit said arm to
engage saidv first mentioned portion of said stop
means, and said last mentioned means> being
operative to prevent rebounding of the door. out
wardly after contacting said iirstmentioned por
tion of said stop means.
2; In combination with. an enclosure having a
frame providing a door opening, a rigid door
employed in the ldoor plate brackets 40, the
therefor adapted in vertical position to close said
hanger wheels I6 would -be forced upwardly
opening and adapted to swing bodily to a sub
against the top of the rail or track 6 when the
stantially horizontal overhead open position, in
door was being opened. However with the flex
terengageable track and roller means connected
ibility in the construction of'the slotted door plate
to said frame and door, a Y stationary support
bracket 4U, the wheelsv iii-í rol-1V smoothly in the
mounted to the rear of said door when the latter
bottom of the track as distinguished from the top, 20 is in closed vertical position, an arm having an
and the upper and lower weatherstrips t0 `and.
axis of turning disposed to the rear of said door
22 respectively do not bind' on the door or jamb.
when in vertical position, said arm having at its
Without this construction the smoothness and
outer end a pivotal connection with said door,
good» balance-of the equipment could» not be ob
spring means interconnecting said door with a
tained and the hardware wouldV be impractical to 25 stationary abutment on said frame tending to
operate, due mainly to the substantial impossi
shift said door from a closed position to an open
bility of obtaining perfect positioning of all im
position and stopv means including a portion
portant pivotal points without the use of the slot
disposed in thev path of movement of said arm
‘iiiv and- its cooperating elements. The lug 48T on
and adapted yieldably to engage a portion of said
the door plate 4‘0 assists in keeping the stud 50 30 arm, whereby preliminarily to check the move
in the correct location when the door isV ap
ment thereof, said portions being shiftable out
proaching open position-,- in the manner herein
of the way of said arm, said stop means includ
before described.
ing an additional portion adapted to lie directly
It will be noted by reference to Figure 1 that
in the path of movement of said arm whereby
the lever 3d is located in relation to the pull of
after said checking action absolutely to preclude
the spring 52 when the door is closed so as to
furtherv movement of said arm-beyond a predeter
provide suiiicient force to start the door 8- out-v
mined position, and said last mentioned means
wardly and upwardly automatically the instant
being operative to prevent rebounding of the
the spring latch for the door is unlocked or
door outwardly after contacting said iirst men
released so that the opening operation of the
tioned portion of said stop means.
door; is practically- automatic and therefore differs
from the construction of most doors of this type
which require a manual initial movement of the
door to start the door into upward movement and
this starting action also eliminates the uncer
tainty of the door going open too fast or too
3. In combination with an enclosure having a
frame providing a door opening, a rigid door
therefor adapted in vertical position to close said
opening and adapted to swing bodily to a sub
stantially horizontal overhead open position, in
terengageable track and roller means connected to
said frame and door, a stationary support mount
quired as hereinbefore set forth.`
ed to the rear of said door when the latter is
Obviously the invention is not limited to the»
in closed vertical position, an arm having an
specific forms disclosed herein but is' capable of
axis» of turning disposed to the rear of said door
other modifications and changes without depart
when in vertical position, said arm having at
ing from the spirit and scope of the claims ap
its outer end a pivotal connection with said door,
pended hereto.
spring means interconnecting said door with a
rPhe invention is hereby claimed:
stationary abutment on said frame tending to
1. In combination with an enclosure having a 55 shift said door from a closed position to an open
frame» providing a door opening, a rigid door
position, and a spring metal stop means disposed
therefor adapted in vertical position to close said
in the path of movement of said arm and having
opening and adapted to swing- bodily to a sub
a portion yieldable out of the path of movement
stantially horizontal overhead open- position, in
of said arm to permit continued but checked
terengageable track and roller means» connected 60 movement of said» arm, said stop means including
to said frame and door, a stationary support
a further portion directly in the path of move
mounted to the rear of said door> when the latter
mentV of said arm to provide a positivestop there
is in closed vertical position, arr arm having anl
for, and said last mentioned means being oper
axis of turning disposed to the rear of said door'
ative to prevent rebounding of the door out
when in vertical position, said arm having at its 65 wardly after contacting saidA ñrst mentioned por
outer end a turnable pivotal connection with said
tion of said stop means.
door, spring means interconnecting said door with
4. In combination with an enclosure having a
a stationary abutment on said frame tending toY
frame providing a doory opening, a rigid door
slow as in the case when hand starting is" re
shift said door from a closed position to an open
position and stop means disposed in the arcuate
therefor adapted in» vertical position to close said
opening and adapted to swing bodily to a sub
path of movement of said arm and having a por
stantially horizontal overhead open position, in
tion adapted to be engaged by'said arm for posi
tively limiting the extreme opening movement of
said door, said y stop Vmeans having a portion
adapted frictionally to` be engaged by said' arm
terengageable track
to said frame `and
mounted to the rear
is in closed vertical
and roller means connected
door, a stationary support
of- said door when the latter
position, an arm. having an
2,405,821
9
'axis of turning disposed vto the rear of said door
when in vertical position,_ said arm having at its
outer end a pivotal connection with said door,
spring means interconnecting said door with a
stationary abutment on said frame tending to
shift saidpdoor from a closed position to an open
position, and spring metal stop means disposed
in the path of movement of said'arm and having
a portion yieldable out of the path of movement
frame providing> a> dooropening, a rig-id door
therefor adapted in closed position to lie" sub
stantially vertical and to shift to substantially
vhorizontal overhead open position, substantially
horizontal trackA means on the upper portion of
said frame, roller means on vsaid door adapted
to run in said track means, a relatively long arm,
means providing at one end of said arm an axis
of turningtherefor located to the rear of said
of said arm to permit continued but checked 10 door when the door is in closed position, spring
means having one end associated with a sta
movement of said arm, said spring metalstop
tionary labutment- disposed, to the rear of said
means comprising an arm adjustable laterally
door when the door is in closed position and hav
with respect to the pathn of movement of vsaid
ing the other end operatively associated with said
first-named arm, whereby to provide a variation
in the frictional engagement of said first-named 15 door -to assist in opening said door, means piv
otally'interconnecting the outer end of said arm
stop means with said arm as the door approaches
and said door including a slot and pin connec
its open position.
tion therebetween arranged so that when the
5. In combination with an enclosure providing
'door is in closed position the pin will be ata
a frame forming a door opening, a rigid door
adapted to be associated with said frame to close 20 point in said slot removed from the upper end
of said slot whereby, to remove the weight of
said opening when the door is in substantially
said door from said arm, said connection includ
vertical position, said door being shiftable bodily
ing stop means associated with the arm to pre
to a substantially horizontal overhead open posi
vent said pin moving in said slot in the open
tion, bracket means disposed on the inside por
overhead position of the door.
Y
tion of said frame, said bracket means `including
a pivotal bearing, an arm having an axis of turn
ing in said pivotal bearing, said arm at its outer
end being pivotally connected to the lower por
tion of said door, a substantially horizontal track
for the upper portion of said frame and roller
for the upper portion of said door adapted to run
in said track, 'spring means having one end con
nected to a- stationary abutment and operatively
connected to said door to tend to swing the door
to open overhead position from closed position
and stop means mounted on said frame adjacent
and above said bracket, said stop means having
its inner end disposed vertically above the pivotal
bearing and lying within the path of movement
of said arm as said arm approaches the position 40
in which the door is in overhead open position,
whereby to_limit said open position of the door,
said stop means having a portion yieldably to
engage the side of the arm to check the closing
8` In combination with an enclosure having a
frame providing a door opening, a rigid door
therefor adapted in closed position to lie’sub
stantially vertical and to shift to` substantially
vertical and to shift to substantially horizontal
overhead open position,. subs'temtiallyv horizontal
track'means on theiupper portion of said frame,
roller means on said door adapted to run in said
trackfmeans, a relatively long arm, means pro
viding at one end of saidarm van axis of turning
therefor located to the rear'of said-door when
the door is in closed position, spring means hav
ing one end associated with a stationary abut
ment disposed to the rear of said door when
the door is in closed position and having the
other end operatively associated with said door
to assist’iniopening said door, means pivotally
interconnecting the outer end of said arm and
said door including _a slot and pin connection
it therebetween arranged so that when the door
is in closed position the vpin will be at a point in
page thereof and‘to prevent lateral swaying of
said slot lremovedfrorr'rthe upper end of said
the door during opening `or closing movement.
movement of the door prior to the complete stop
slot whereby to remove the weight of said door
from said arm, said connection including means
therefor adapted in closed position to lie sub 50 operative only when the door is in overhead posi
tion to maintain said pin at the upper end of
stantially vertical and to shift to substantially
said slot.
‘
horizontal overhead open position, substantially
6. In combination with an enclosure having a
frame providing a door opening, a rigid door
9. In combination with an enclosure having a
horizontal track means on the upper portion of
frame providing a door opening, a rigid door
said frame, roller means on said door adapted to
run in said track means, a relatively long arm, 55 therefor adapted in closed position to lie sub
stantially vertical and to shift to substantially
means providing at one end of said arm an axis
horizontal overhead open position, substantially
of turning therefor located to the rear of said
horizontal track means on the upper portion of
door when the door is in closed position, spring
said frame, roller means on said door adapted
means having one end associated with a station
to run in said track means, a relatively long arm,
ary abutment disposed to the rear of said door
means providing at one end of said arm an axis
when the door is in closed position and having
the other end operatively associated with said
door to assist in opening said door, means piv
otally interconnecting the outer end of said arm
and said door including a slot and pin connection
therebetween. arranged so that when the door is
in closed position the pin will be at a point in
of.' turning therefor located to the rear of said
door when the door is in closed position, spring
means having one end associated with a station
ary abutment disposed to the rear of said door
when the door is in closed position and having
the other end operatively associated with said
door to assist in opening said door and means
said slot removed from the upper end of said
providing a pivotal connection between the outer
slot whereby to remove the weight of said door
from said arm, and means operative only in the 70 end of said arm and said door including a slot
and pin connection operative when the door is
open position of the door for preventing relative
in vertical position to remove the pin from that
bodily shifting movement between the pivotal
end of the slot in which position the weight of
connection at the outer end of the long arm and
the door will be carried by said arm, said lost
the door.
7. In combination with an enclosure having a 75 motion connection including means operative
2,405,821
1.1
«only when the :door -is in overhead position 'to
maintain -the pin fat .such aforesaid »pend of Kthe
slot.
1.0. In combination with an .enclosure having
a frame «providing ,a door opening, a Vrigid door
:therefor .adapted in .closed position to .lie sub
stantially »vertical and to shift .to .substantially
:horizontal overhead »open position, substantially
horizontal track means -on the -upper portion Aof
said frame., roller ,means »on said door adapted
.to run insaid trackmeans, a relatively long arm,
means providing at one end of said arm an axis
.of turning therefor located> to the lrear .of said
door when Lthe .door .is in closed position, .spring
means .having -one vend associated with a station
ary abutment >disposed .to the rear of -said .door
when the `door in closed position »and having
the other end operatively associated with said
door to assist in opening’ said »door and .means
the door and :operative when »the door is in ver
tical position „to permit movement of the pin
vertically downwardly in the slot so as to remove
the weight of the door from the .arm together
with .means for preventing relative -movement be
tween the slot and ythe pin when the door is .in
overhead substantially horizontal position, said
last named means comprising astop lug disposed
-in the path of movement of lthe arm for prevent
ing the pin'from moving in the `slot only when
the door is in overhead substantially horizontal
position'.
l ' 12. In combination with an -enclosure having
a .frame providing a door opening, a lrigid .door
therefor adapted .in .closed position to lie sub
stantially vertical .and -to .shift to substantially
horizontal overhead open position', substantially
horizontal track means fon the upper por-tion of
said frame, roller »means mounted on said door
providing .a pivotal connection Vbetween the outer 20 relatively -close to the upper inner face of said
end V»of .said arm .and .said -door including `a `slot
door and adapted to .run in said track means and
and pin pivotal .connection between the .arm iand
.the Àdoor and operative when the door vis in ver
tical position to permit movement of the 'pin ver
comprising the sole support'for said door when
the »door is in y'closed posi-tion, va .relatively long
arm, means providing >at one end of said arm an
tically downwardly .-in the slot .so las to remove 25 axis of turning therefor located -to the rear of
.the >Weight 4of vthe door :from the .arm and vin
said doorv `when the door «is in closed position,
cluding means »for preventing .relative .movement
the other Yend »of said arm being -pivoted to a
between the .slot and the `pin vonly 4when the door
bottom »portion »of said door, a .stationary abut
is in l.overhead substantially horizontal position.
ment disposed at the .rear vof the -door when the
~11. In combination with Aan »enclosure having 30 door is in closed'position, .spring means connected
with the stationary abutment and having the
thereforadapted in rclosed position to lie :sub
other end loperatively associated with the door
stantially vertical and'ito shift to substantially
to assist in opening said door, and means pro
horizontal »over-head -open position, substantially
viding na pivotal connection between the »outer
a `frame providing a door opening, a .rigid 'door
horizontal track means :on the fupper portion of
end 'of said arm and said door, said Aarm and said
track .and .roller means constituting the sole sup
port means for the door when the door is -in
means providing at one »end of .said arm an axis
shifted position, said last »named pivotal connec
of .turning therefor located to lthe rear -of said
tion between the arm :and door including means
door `whenvthe door is .in closed position, spring 40 automatically shifting relative to the 'door to a
means having one `.end .associated vwith a `station
position to .remove ithe weight of the `door from
ary abutment disposed .to .the :rear of «said `door
said pivotal connection when the door .is in closed
when the :door .is in 4.closed position .and having
position, and .including .means -for interlocking
the other endfoperatively associated with said
the .arm and the idoor against relative :shifting
door to »assist ¿in opening said door .and means 45 when the door reaches -open position.
said frame, v«roller 4means ,on vsaid door adapted
to run .insaid .track means, a relatively long arm,
providing a 4pivot-.al ßonnection between the outer
end of .said arm `and said Vdoor including ~a slot
and _pin pivotal ~connection between the .arm and
WILLIAM D. FERRIS.
CECIL R. WOLF.
Certificate of Correction
Patent No. 2,405,821.
August 13, 1946.
WILLIAM D. FERRIS ET AL.
It is hereby certified that error appears in the printed specification of the above
numbered patent requiring correction as follows: Column 10, line 30, claim 8, strike
out the Words “Vertical and to shift to substantially” ; and that the said Letters Patent
should be read With this correction therein that the same may conform to the record
of the oase in the Patent Oñìoe.
Signed and sealed this 4th day of March, A. D. 1947.
[mr-1
LESLIE FRAZER,
First Assistant ûommíssz'oner of Patents.
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