. 17, 1946. 4 H. B. CLARK DOOR OPERATING APPARATUS Filed Oct. 24, 1944 3 Sheets~Sheet l O .mxwoshm,mb Cîîforneg Dec., 17, E946, H. E, QLARK DOOR OPERATING APPARATUS Fil'ed O01). 24, 1944 à v 1412,73 3 Sheets-Sheet 2 ää - à? VI -_Í f@44'45/9 E?? Ígëë? H, @LÄRK DOOR OPERATING APPARATUS Filed oct. 24, 1944 3 Sheeîs-Sheet l? Suvenfor Cîtîomeg 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.