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. 17, 1946. 4
H. B. CLARK
DOOR OPERATING APPARATUS
Filed Oct. 24, 1944
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H. E, QLARK
DOOR OPERATING APPARATUS
Fil'ed O01). 24, 1944
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DOOR OPERATING APPARATUS
Filed oct. 24, 1944
3 Sheeîs-Sheet l?
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Patented Dec. 17, 1946
2,412,87l
UNl'i'iED STATES PATENT OFFICE
2,412,871
BOOR OPERATING APPARATUS>
Henry B. clark, Elizabeth, N. J'.
Application October 24, 1944, Serial No. 560,144
1
9 Claims.
(Cl. 268-63)
2
This invention relates to mechanism for open
ing and closing doors of buildings, particularly
doors which include two complemental sections
movable toward and from each other in a door
way to close and open said door-way, respectively.
One object of the invention is to provide novel
and improved simple, reliable and relatively in
expensive apparatus f_or simultaneously moving
of a garage, boat house, factory building or
other structure having a door opening or door
way il which is provided with two inwardly
swinging doors which are hingedly connected to
the frame of the door~way by hinges l2 and
each of which is composed of two sections or
leaves i3 and i4 hinged together at l5. With
this construction, the door sections 3 and le
said door sections toward and from each other
of the two doors may be swung into a common
to close and open the door-way, respectively.
vertical plane to close the door opening as shown
Another object is to provide a combination of
in Figure l and by solid lines in Figure 2 or
such a door-operating apparatus and novel and
may be swung inwardly oi the door opening to
improved electrical means for actuating said ap
open the latter as shown by dot and dash lines
paratus which shall enable both the opening and
the closing movements of the said apparatus t0 15 in Figure 2. To insure proper folding and un
folding» of the door sections, each encimost sec
be controlled by only one simple manually oper
tion i4 has secured thereto a bracket EE’ in
able element such as an electric switch and which
may comprise any of several mechanical or elec«
which is journaled a guide roller EB which co
operates with a horizontal channel rail il’ which
trical methods and mechanisms.
A further object is to provide door-operating 20 is stationarily mounted above the upper edges
of the door on the wall nl in any suitable man
mechanism of the character described which
ner. As shown, the guide rail is connected to
shall embody novel and improved features of
hangers i3 which are mounted by bolts i2 on
construction for stopping of operation of the
the wallrlil above the door opening and support
doors by the actuating mechanism and thereby
a guide track 2i] for the door operating mech
to ensure against injury to the doors or to a
25 anism.
person or an object such as a truck or the like
The guide track 20 may be of any suitable
in case the doors should accidentally strike such
construction but is shown as a horizontal split
person or object during operation of the doors.
tube of rectangular cross section having a longi
Other objects, advantages and results of the
tudinal slot 2l in its bottom wall. Slidable with
invention will be brought out by the following
in the guide track and movable toward and from
description in conjunction with the accompany
each other are two guide blocks 22, each of which
ing drawings in which
may be or any suitable construction but is shown
Figure 1 is an inside elevational view of a wall
of a structure having a door provided with oper
ating mechanism constructed in accordance with
the invention.
Figure 2 is a horizontal sectional view on the
line 2_2 of Figure l, sho-wing the doors in closed
position by solid lines and in open position by
dot and dash lines.
Figure 3 is a vertical longitudinal sectional
view on the line 3~3 of Figure 2.
Figure 4 is an enlarged transverse vertical
sectional view on the line 4_4 of Figure 3.
Figure
as comprising a sheet metal core 23 whose outside
dimensions are smaller than the inside dimen
35 sions of the track 2li and to which are fastened
shoes 24 of suitable material such as lignuin
vitae. The shoes 24 have a free sliding Contact
with the inner walls of the track 2B so as to
smoothly guide the blocks in the track.
One guide block is connected to the section I3
of each door which is hingedly connected to the
door frame and as shown, each door section i3
has an inwardly projecting arm 25 rigidly con
5 is a similar View on the line §`5 of 45 nected thereto and to which is pivotally connected
at 2l one end of a link 28, the other end of which
is pivotally connected to a stud 2i) which is se
6 is an enlarged fragmentary horizontal
cured in the corresponding guide block 22.
view on the line E-S of Figure 1, show
Figure 3.
Figure
sectional
For simultaneously moving the guide blocks 22
ing the selector switch and its relation to the
toward and from each other, I utilize two ñeXible
guide track.
50 conectors 3B, preferably chains, each of which
Figure 7 is a wiring diagram of the electrical
hasone end connected to one of the guide blocks
circuit for controlling operation of the motor
22 as at 3| and its other end connected to the
which drives the door operating mechanism.
other
guide block as at 32. Adjacent each end
Figure 8 is a fragmentary inside elevational
of the track 2B and preferably within the track is
view of a modiñcation of the invention, and
Figure 9 is a horizontal sectional view on the
55 a guide 33 over which passes the intermediate
portion of one of the chains 32. Preferably the
line 9-9 of Figure 8.
guides 33l are sprockets and one of them is driven
Speciñcally describing the embodiment of the
so as to move the chains longitudinally upon ro
invention illustrated in Figures l to 'l inclusive,
tation
of the sprocket. With this construction, it
thereierence character lil designates the wall 60
will be seen that upon longitudinal movement of
2,412,871
3
one of the chains 30 in opposite directions, the
guide blocks 22 will be moved toward and from
each other respectively so as to close and open the _
normally engage their respective terminals 55.
The contact arms are actuated by alever 6| piv
otally mounted intermediate its ends in the cas
ing and having a roller 62 at one end to engage
the contact arms, and a pin and slot connection
53 at its other end with an operating lever 64
doors. Preferably a grooved idler roller 33’ is
journaled centrally oi the length of the track for
guiding the longer reaches oí the chains when
which is pivotally mounted at 55 intermediate its
the guide blocks are adjacent the ends of the
ends on the casing and has a roller 66 at its other
guide track 2S.
end extending through an opening S'í in the side
As shown, the driven sprocket 33 is keyed on
wall of the guide track 2U into the path of move
l0
a shaft (ill journaled in bearings 35 on the track
ment of one of the guide blocks 22. The guide
2li and upon which is also fastened a gear 35
which meshes with a pinionl t'l that is fast con
nected to driving shaft 38. The shaft 38 is jour
naled in bearings 39 on the track and has thereon '
a friction clutch which comprises a body sec
tion dû keyed on the shaft 38 and a pulley section
lil rotatable on the shaft and normally held in
frictional contact with the body 5B by a compres
sion spring e2. The pulley section lll is connected
block 22 and the lever 65 are so related that just
prior to closing of the doors the blocks 22 will
swing the lever B5 in one direction, while when
the block moves in the other direction during
opening of the doors the lever 65 will be actuated
in the opposite direction. When the lever 65 is
operated in either direction the lever 5l is op
erated to release one of the contact arms 58 for
engagement with its corresponding terminal con
by a belt ¿i3 to a smaller pulley lill on the shaft of 20 tact 5S and to force the other contact arm 58 out
an electric motor ¿i5 which for convenience is
of engagement with its contact 55. A tension
mounted on the top of the track 2li.
spring 65 connects the two levers to hold the lever
In accordance with the invention the motor ¿i5
5l in the last mentioned position.
is reversible and its operation to open and close
in operation of the apparatus, .assuming the
25
the doors is controlled by a single simple switch
doors to be closed as shown by solid lines in Fig
that may be manually operated or might be auto
matically operated, such as a pneumatic switch
in the iioor to be operated upon passage there
over of a truck.
In the interest of simplicity of
explanation, I have shown a simple push button -
switch fit which may be mounted in the wall Ill.
’ Connected in circuit with the switch ¿iii is a known
type of magnetic controller ¿il for the motor 45,
a gear limit switch lli? and a selector switch 49.
The gear limit switch e8 may be of any suitable
construction, for example as shown in U. S. Pat
ent No. 2,221,324 dated November 12, 1940, and
includes a driving spindle 5o connected to the
shaft 3d on which the driving sprocket 33 for
the chains 3i! is mounted. The switch also in
cludes two terminal contacts 5| which are con
nected together and one of which is connected
to one terminal of the push button switch ¿35 by a
wire 52 while the other is connected by a wire 53
to one side of the electricity supply line. Each
terminal contact 5l has cooperating therewith a
contact arm 54 one of which is connected to one
ures i and 2, the manually operable switch lit will
be open as shown in Figure 7. To open the doors
the operator will momentarily close the switch B6
and thereupon the magnetic motor controller
mechanism :il will be operated to start the motor
and close the right-hand holding switch 55.
Then the motor will continue to operate in one
direction and drive the chains 35 so as to move
the guide blocks 22 away from each other and
open the doors. During this operation the se
lector switch :i9 will be operated by the guide
block 22 so that upon the next closing of the
circuit by the push button switch, the motor will
be operated in the other direction. IThe spindle
5@ of the gear limit switch ¿i8 will be driven dur
ing vthe opening movement of the doors and will
have been set in known manner so that when the
doors approach their full open position the con
tact arms 55 will be operated so as to stop the
motor and at the same time set the switch for
reverse operation of the motor upon the next mo
mentary closing of the manually operable switch
terminal of one holding switch 55 while the other
itâ.
is connected to one terminal of the other holding
When it is desired to close the doors, the man
50
switch 55. The two arms 56 are actuated in
-ually operable switch 4S will again be closed,
known manner by rotation of the spindle 5D so
whereupon the motor will be started in the direc
that when one arm engages its corresponding ter
tion opposite to that in which it moved during
minal contact 5I, the other arm is disengaged
opening of the doors and the left-hand holding
from its contact 5i.
switch 55 will be closed to continue the operation
The selector switch its includes two terminal
contacts 55 which are connected together and one
of which is connected by a wire 51 to the other
terminal of the push button switch 46. Coop
of the motor when the switch t6 is released. \
During the closing movement of the doors the
selector switch «t9 again will be actuated, and
when the doors approach their closed position
erating with each of the contact terminals 56 is a
the gear limit switch contact arms 54 will be
contact arm 58 one of which is connected to the 60 operated to stop the motor and set the switch
other terminal of one of said holdingv switches 55
while the other is connected to the other ter
minal of the other holding switch 55. The se
lector switch 49 is operated by one of the guide
blocks 22 and may be of any suitable construc
tion, for example such as described in U. S. Pat
ent No. 2,343,867 dated March 7, 1944. For sim
plicity in explanation, ï have shown a modiiied
construction in Figure 6 of the drawings wherein
the switch includes a casing 59 of suitable insu
lating material which is mounted on a bracket
50 on the guide track 2d. The terminal contacts
55 are mounted on the walls of the casing as is
also each of the contact arms 58, and said contact
arms are shown as inherently resilient so as to
for operation of the lmotor in the direction to
open the doors upon the next closing of the man
ua’lly operated switch 48,
It will be observed that the guide blocks 22 in
conjunction with the two chains 30 in eiîect form
an endless chain but eliminate the complications
which would be involved in attempting to utilize
a true endless chain. Also the guide blocks in
the track ensure a positive smooth-running op
erating mechanism with a minimum of moving
parts. The door may be easily and conveniently
operated by the simple manipulation of only one
switch, which is operated in the same manner
to both open and close the doors, and there is no
2,412,871
danger of the operating mechanism being started
into operation in the wrong direction. The fric
tion clutch 4i, ¿it ensures a stopping of the driv
ing of the chains 3U by the motor should either
a truck during either opening or closing of the
doors.
It will he understood by those skilied in the
art that if only one door is to be operated, only
one guide block E2 and one chain would be re
quired, the chain having its opposite ends con
nected to Athe guide block and one sprocket or
claim l with the addition ot a motor, mechanism
for driving said flexible connectors from said mo
tor, and means whereby said motor may be op
erated in either of opposite directions as desired.
4. The door operating apparatus set forth in
claim l with the addition of means for longitudi
nally moving said liexible connectors, a ñXed
guide rail mounted above the doors, and means
mounted on each door and engaging said rail to
guide said door.
5. The door operating apparatus set forth in
guide member being located adjacent each side
claim 1 with the addition of a reversible electric
door encounter an obstruction such as a person or
of the doorway.
motor, mechanism for driving said iiexible con
Other types of limit switches than those de l5 nectors from said motor, switch mechanism in
cluding a switch for closing a circuit to cause
scribed may be utilized and other electrical or
rotation of said motor in either direction, and
mechanical methods and mechanisms may be
mechanism for automatically stopping said mo
used for operating the guide blocks 20. For ex
tor when the doors reach a predetermined posi
ample, a reversing switch mechanically operated
tion during movement in either direction.
by a lever at each limit of travel of the doors or
6. A door operating apparatus comprising a
guide blocks in combination with holding relays
horizontal split tubular track above the doors and
for controlling the circuit to the motor, such that
having a longitudinal slot in one side thereof,
at the limit of movement of the doors in each
two guide blocks spaced longitudinally of and
direction one lever would be operated to actuate
slidably mounted in said track for movement to
the reversing switch and one of said relays to
ward and from each other, two chains wholly
stop the motor and to cause operation of the
enclosed within said tubular track each having
doors in the other direction upon the next mo
one end connected to one of said guide blocks
mentary closing of the manual operable switch.
and its other end connected to the other guide
Another possible mechanism would include a gear
limit switch which will control the now of cur 30 block, a sprocket journaled within said track
for each chain and around which passes the in
rent in each direction, in combination with re
termediate portion of said chain such that said
lays for controlling the operation of the motor.
blocks are moved toward and from each other
A modiñcation of the invention is shown in Fig
upon movement of either of said chains over its
ures 8 and 9 where each door includes the two
hinged leaves 'l0 and 1|, the latter of which is .i said sprocket in opposite directions respectively,
a pin secured in each said block and projecting
through said slot in said track, links each hav
hingedly connected at 12 to the wall 13 in the
same manner in which the doors shown in Figures
1 and 2 are mounted. The outer section or leaf
'I0 of each door has a guide roller 14 thereon mov
able in a guide rail 15, which corresponds respec
tively to the roller I6 and guide rail I 'I herein
before described. The rail 15 is mounted on the
door frame by suitable brackets 1B and at each
end thereof adjacent the point of hinging of the
doors to the wall there is an arcuate portion 11
concentric with the axes of the hinges 12 and
through which the corresponding roller 'I4 may
move to permit swinging of the door sections
completely out of the door opening 18 and into
a plane parallel with the plane of the wall as '
shown by dot and dash lines in Figure 9.
Other modifications and changes in the de
tails of construction of the door operating ap
paratus, and in the use of the door operating ap
paratus with other door structures, will occur to
those skilled in the art as within the spirit and
ing one end pivotally connected to one of said
pins and its other end to be pivotally connected
to a door and means for driving one of said
sprockets to move said chains and operate said
doors.
7. The door operating apparatus set forth in
claim 6 wherein said means for driving said one
of said sprockets is a motor and with the addi
tion of means whereby said motor can be oper
ated in either of opposite directions as desired.
8. The door operating apparatus set forth in
claim 6 wherein said means for driving said one
of said sprockets is a motor and a driving con
nection including a spring closed friction clutch
between said motor and said sprocket, said
clutch being capable of yielding to stop driving
of said chains upon engagement of- either door
with an obstacle, and with the addition of means
whereby said motor can be operated in either of
opposite directions as desired.
9. A door operating apparatus comprising a
horizontal split tubular track having a longitu
1. A door operating apparatus comprising a
horizontal track, two guide blocks spaced longi 60 dinal slot in one side thereof, two guide blocks
spaced longitudinally of and slidably mounted in
tudinally of and movable toward and from each
said track for movement toward and from each
other in said track, two flexible connectors each
scope of the invention.
Iclaim:
having one end connected to one of said guide
blocks and its other end connected to the other
guide block, a guide for each connector around
which passes the intermediate portion of said
connector such that said guide ylocks are moved
toward and from each other upon iongitudinal
movement of either of said connectors in opposite
other, two flexible connectors wholly enclosed
within said track each having one end connected
to one of said guide blocks and its other end con~
nected to the other guide block, a guide for each
connector around which passes the intermediate
portion of said connector such that said guide
blocks are moved toward and from each other
directions respectively, and means for pivotally 70
connecting each guide block to a door.
2. Thegdoor operating apparatus set forth in
claim 1 with the addition of means for longitudi
nally moving said iiexible connectors.
3. The door operating apparatus set forth in 75
HENRY B. CLARK.
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