US2958089A - Door back-check and hold open mechanism - Google Patents

Description

Nov. l, 1960 .1, M. ROEHM ETAL DOOR BACK-CHECK AND HOLD OPEN MECHANISM Filed June 23, 1958 3 Sheets-Sheet 1 ATTOEA/eys.

Nov. L i960 J. M. ROEHM ETAL DOOR BACK-CHECK AND HOLD OPEN MECHANISM Filed June 23, '1958 5 sheets-Sheet 2 INVENTORS JACK M. ROEHM AND VCTOR W DAMM ATToz/dE-fs.

Nov. 1, 1960 J. M. ROEHM ETAL DooR BACK-CHECK AND HOLD OPEN MECHANISM Filed June 23. 1958 3 Sheets-Sheet 3 INVENTORS JCK M. ROEHM AND VCTOR W. @AMM ATTORNEYS.

United States Patent l DOOR BACK-CHECK AND HOLD OPEN MECHANISM Filed June 23, 1958, Ser. No. 743,930

4 Claims. (Cl. 16-49) The present invention relates to door back-check and hold open mechanisms and, in particular, to a mechanism cooperatively associated with an arm connection attached to a door closer.

It is an object of the present invention to provide for a door a new and improved back-check and hold open mechanism which is particularly suited 4for use with arm connections located between a door closer and the door.

-It is another object of the present invention to provide a door back-check and hold open mechanism for limiting the opening movement of a door to a desired maximum open position and for holding the door in the desired open position.

It is another object of the present invention to provide ia back-check device which is adjustable to vary the maximum open position of a door.

It is a further object of the present invention to provide a back-check device engageable with an arm cont nection of a door closer and supported in a track disposed within a recess in a rail of the door, the track being adjustable relative to the door rail to vary the maximum open position of the door.

It is yet another object of the present invention to provide a back-check device for use with aroller supported by an operating arm of a conventional door closer, which device employs a resilient stop for initially cushioning the opening movement of the door anda fixed stop -for stopping the movement of the door when a door opening force overrides the -force of the resilient stop.

It is yet a further object of the present invention to provide a hold open device embodying a tapered holder adapted selectively to be rendered eiective to hold a door open in a v predetermined position and to be rendered ineliective to permit unobstructed door movement.

A still further object of the present invention is to provide for an arm connection of a door closer a hold open device including a resilient tapered holder extend- Aing at all ltimes inwardly of a track of the door and selectively reciprocable into and out of the path of the arm connection.

`It is another object of thepresent invention to provide a hold open device which is adjustable to Vary the hold open position of the door.

It is still a further object of the present invention to provide a hold open device engageable with an arm connection of a door closer and supported by a track disposed in a door, the track being adjustable relative to the door rail to vary the hold open position of the door. i Other objects and advantages of the present invention will become app-arent iirom the ensuing description of an embodiment of the invention in the course of which reference is had to the accompanying drawings in which:

Fig. 1 is a perspective view of a new and improved door back-check and hold open mechanism shown located in a recess in the upper rail of a door fragmentarily illustrated, and operatively connected by an arm connection to a door closer;

Fig. 2 is an enlarged perspective View of the mecha- ICC nism of Fig. 1 shown in a fragmentary portion of the upper rail and partly broken away, illustrating abackcheck device and a hold open device supported by a longitudinally adjustable track;

Fig. 3 is an enlarged sectional View taken along line 3 3 of Fig. 2; Y Y

Fig. 4 is a fragmentary sectional View taken along line 4-4 of Fig. 2, illustrating the means for adjustably positioning the track relative to the door;

Fig. 5 is a top plan view of the mechanism of Fig. 1, partly broken away, illustrating the position of the backcheck device and hold open device relative to the door when a maximum door open position and door hold open position of approximately degrees is desired, the door being shown in this position relative to the door frame;

Fig. 6 is a view similar to Fig. 5, illustrating the position of the back-check device and hold open device for a maximum door open position and a door holdopen position of degrees;

Fig. 7 is a fragmentary exploded perspective view-of the hold open device embodied in the mechanism of Fig. l;

Fig. 8 is an enlarged perspective view of a holder embodied in the hold open device shown in Fig. V7; j

Fig. 9 is an enlarged sectional View taken substantially along line 9--9 of Fig. 5 illustrating the hold open device in its effective position in engagement with the arm connection;

Fig. 10 is a fragmentary sectional view similar to Fig. 9 illustrating the hold open device in its eiective position;

Fig. l1 is a fragmentary sectional view taken along line 11--11 of Fig. 9, assuming the roller is engaging the hold open mechanism; t

Fig. 12 is a fragmentary sectional view taken along line 12-12 of Fig. 9; and

Fig. 13 is a fragmentary perspective View of 1a modiied form of the longitudinally adjustable track.

Briefly, the back-check and hold open mechanism is adapted to be used with a door member movably supported from a door yframe member. The mechanism is mounted from one of the members and is operatively connected to an arm connection comprising a connector or roller supported from an operating arm which is connected to a door closer supported from the other member. The mechanism comprises a back-check device for limiting the opening movement of the door to a desired maximum open position and a hold open device for maintaining the door in a hold open position substantially identical to the selected maximum open position. The back-check and hold open devices are lindividually mounted on a roller receiving track which is adjustably positioned and longitudinally movable in a recess in the one member for setting the maximum open and hold open positions of the door. The track includes a web interconnecting a pair of spaced walls which receive the roller supported from the operating arm and is secured by fastener means to the one member `in selected relative positions corresponding to desired maximum open Iand hold open positions of the door.V The back-check device comprises a resilient stop and a xed stop mounted on the track for engagement with the roller, the resilient stop providing a uniformly increasing force for the roller and the xed stop providing a final abutment for halting the movement of the roller and the door. The backcheck device is movable with the longitudinally adjustiable track thereby to vary the distance the roller travels before encountering the resilient stop and hence to vary the amount of door opening movement.

The hold open device includes a vertically movable holder having a tapered head located in a vertical'V slot dened in a wall of the track. The holder is resiliently biased toward the axis of the track by a leaf spring so that its tapered head is at all times urged inwardly of the track.

The holder is rendered effective or ineifective by being raised or lowered into and out of the path of the roller and is supported by an offset or crank shaft which is supported by the adjustable track. The shaft is rotatably secured to the track and extends through longitudinal slots defined in the sides of the one member, the slots permitting movement of the shaft incident to longitudinal adjustment of the track. Handles are mounted on the outwardly extending ends of the shaft to facilitate turning of the shaft when it is desired to move the tapered head. When the holder is rendered eifective and the door is manually opened, the roller engages and deflects the tapered head outwardly of the track at is moves along the track. After the roller moves past the head, the head is moved inwardly of the track by the leaf spring back into its original position. The door is manually set in its door open position by closing the door until the roller engages the tapered head and then removing the manual force applied to the door. The resilient tapered head holds the roller and hence the door in the door open position even though the force of the door closer acts on the arm connection. The hold open device, similar to the back-check device, is movable with the longitudinally adjustable track thereby to hold the door open in a position corresponding to the position of the track.

Referring now to the drawings and specifically to Figs. l and 2, a new and improved door back-check and hold open mechanism 20 is shown mounted within an upper channel rail 21 of a door 22. The door 22 swings horizontally relative to a door frame 24, and, particularly, is supported adjacent one of its vertical edges from the door frame 24 by an upper pivot pin 23 and a lower pivot pin (not shown), the door being either single-acting or double-acting, i.e., swings horizontally on only one side or both sides of the door frame 24. The mechanism has Vprimary utility with an arm connection including an operating arm 25 connected at one end to a spindle 26 of a single or double-acting door closer 27 and connected at its other end to a connector or roller 28 operatively associated as described below with the mechanism 29. The closer 27 may be of the type described and claimed in the application to Dan C. Muessel and Harold E. Gramse, Serial No. 850,494, filed November 2, 1959 and forming a continuation-in-part of application Serial No. 743,844, led June 23, 1958, now abandoned and assigned to the same assignee as the present application. The door 22 is manually opened by a person walking through the doorway 24 and is closed under the control of the door closer 27, the closer 27 as is well-known developing a door closing force when the door is opened.

Briefly, the back-check and hold open mechanism 20 comprises a track 30 which slidably receives and guides the roller 28 and is adjustably secured to and longitudinally movable relative to the door rail 21. It further comprises a back-check device 31 supported from and movable with the longitudinally adjustable track for checking the opening movement of the door 22 in a selected maximum door open position and a hold open device 33 likewise supported from and movable with the longitudinally adjustable track for holding the door in a hold open position substantially the same as the maximum door open position. The hold open device 33 cooperates with the roller 28 of the arm connection and is rendered selectively effective and ineffective by an operator assemseated on the web 38 of the rail 21 while the walls 32 and 34 of the track 30 may be slightly spaced from the rail sides 40 and 42 comprising part of the opposite sides of the door 22. The roller 28 is axially moved in the track 30 under the control of the operating arm 25 when the door is opened and closed. Specifically, the roller 28 is urged downwardly by the operating arm to slidably seat on a bar 44 secured to the web 36 by fasteners 46. The roller 28 is free to move upwardly and out of the track, but is maintained in engagement with the bar by the 0perating arm 25 and the closer 27. In a modified track 130 illustrated in Fig. 13, the roller is received within a pair of inwardly facing grooves 144, 146 defined in the Walls 132 and 134, respectively, instead of being supported by a bar or the like. The grooves have at right angularly related surfaces and are oversized to permit the peripheral portion of the roller 28 to move freely in the track. With this construction, the roller is unable to be inadvertently raised out of the track and is positively maintained at a predetermined level within the track. In installation the roller, prior to attachment of the arm connection to the closer, is placed in the grooves 144 and 146 by lowering the roller downwardly through a pair of vertical recesses 148 and I150 which communicate with the grooves 144 and 146. The recesses 148 and 150 are located adjacent the swinging edge of the track and to the left of the position of the roller when in its door closed position.

Irrespective of which of the above track structures is used, the center of the roller 28 is rotatably secured to a stud 29 which depends downwardly from the end of the operating arm 25, which arm 25 partially lies in a recess 47 defined in the upper portion of the rail sides 40 and 42 and located intermediate the ends of the rail 21. The roller 28, as is Well-known, moves from its door closed position (not shown) adjacent to the swinging edge of the door toward the pivot edge of the door, i.e., from left to right as viewed in Figs. l and 2, as the door is manually opened, and moves in the opposite direction when the door is closed by the closer 27. This roller movement, of course, is effected because of the spaced relationship of the door pivot 23 and the door spindle 26.

Considering now specically the back-check device 31, it includes a block 60 xedly secured by fasteners 57 at the right end of the track 30, as viewed in Figs. 2, 4, 5 and 6. The block includes a pair of vertical anges 61 nested between the walls 32 and 34 of the track 30 and a vertical web 62 interconnecting the right ends of the flanges and lying transverse of the track 30 as shown in Fig. 4. A cover plate 63 is attached to the upper edges of the flanges 61 and web 62 by the same fasteners 57 which secure the block 60 to the track 30. The web 62 of the block 60 is provided with an aperture 63 for loosely accommodating a stem 64 of a resilient rollerengaging stop 65. The stop 65 includes a head 66 having a vertical concave surface 66a conformably shaped to the edge of the roller 28. It is resiliently supported from the block 60 by a coiled spring 68 located between the head 66 and the web 62 of the block 60 and is adapted to be moved to the right by the roller 28 to compress the spring 68. As best shown in Fig. 4, a plate 70 is secured by a fastener 72 to the end of the stem 64 extending through the aperture 63 and engages the web 62 of the block 60 to prevent disassembly of the stop 65 and the block 60 by the spring 68. By this construction, there is provided a resilient stop 65 for cushioning the impact between the rapidly moving roller 28 and the head 66, i.e., offering an increasingly greater resistive force to the roler 28 as the lroller 28 moves further to the right.

The back-check device 31 further includes a fixed stop for finally stopping the movement of the roller 28 in vertically beveled to provide a pair of spaced roller en- Vthe roller first encounters the resilient stop 65 which develops a progressively increasing force during subsequent opening movement. The force of the resilient stop is adequate in practically al1 cases to overcome the door opening force and arrest the movement of the door, thereby substantially to eliminate shock vibrations resultng from engagement of a moving roller with a fixed member. However, in a few instances when the force of the resilient stop is not adequate, the xed stop abruptly halts the opening movement of the door, thereby positively assuring that the door will be stopped irrespective of the magnitude of the door opening force.

In accordance with another aspect of the present invention, the back-check or maximum open position of the door can be adjusted throughout a wide range. Specically, the track 30, on which the back-check device 31 is xedly mounted, is adapted to be secured in one of a plurality of positions along the channelled door rail 21 so that the position of the stop 65 relative to the roller when in its door closed position varies in accordance with the position of the track 30. Hence, by locating the track 30 and the stop 65 in different longitudinal positions within the door rail 21, the length of the stroke of the roller 28, i.e., the distance the roller travels between its door closed position and its door open position in which it abuts against the stop 65 is adjusted in accordance with the selected maximum door open position. Y

As best shown in Fig. 5, a rst set of tapped openings, indicated individually by reference characters as 80a, 80h and 80C, and a second set of tapped openings, indicated individually by reference characters as 82a, 821; and 82e, are provided in the left and right halves of the web of the channel door rail 21. A pair of apertures 88 and 89 are dened in the web 36 of the track 30 adjacent respectively to the left ends of the Walls 34 and 32 and a pair of apertures 90 and 91 are defined in the web 36 of the track 30 adjacent respectively to the right ends of the walls 32 and 34. By this construction, as the track 30 is moved toward the right, first, the apertures 88 and 90 become aligned with the openings 80a and 82a respectively, second, apertures 89 and 91 become aligned with openings 80h and 82b respectively, and third, the apertures 88 and 90 become aligned with the openings 80o and 82e respectively. A pair of fasteners 84 and 86 are inserted through selected ones of the aligned apertures and openings to xedly secure the track 30 to the door rail 21 in a selected position. It will be appreciated that because of the relative positions of the apertures 88, 89, 90, 91 and the openings 80a, 80b and 80C and 82a, 82b and 82C, the fasteners 84 and 86 are positioned on opposite sides of the track 30 in each of the above selected positions. Moreover, the openings 80a, 80h and 80e and 82a, 82b and 82a` are spaced as shown to provide a minimum amount of Weakness in the door rail. This would not be the case in the event the openings 80a, 80h and 80a` and 82a, 82b and 82C were located in a straight line since in order to position the track in the most desired open positions, i.e., 90, 105, and 120 degrees, the openings would be immediately adjacent to one another.

In order to effect a 90 degree back-check position, the fastener 84 is disposed in the aligned aperture 88 and the opening 8011, and the fastener 86 is disposed in the aligned aperture 90 and the opening 82a as shown in Figs. 2 and 5, thereby to so locate the stop 65 within the channelled rail 21 that it engages the roller 28 and arrests the movevment of the door in the position shown. In order to in-` "6 crease the range of the door opening movement to 120 degrees, the fasteners 84 and `86 are removed from the apertures and openings by a screw driver or the like tool andthe track 30 is slid to the right, as viewed in Figs. 2, 5 and 6, until the apertures 88 and 90 are respectively aligned visually with the openings C and 82C. The fasteners 84 `and 86 are inserted respectively into the apertures 88 and 90 and then threaded into the tapped openings 80C and 82C thereby xedly locating the track 30 within the rail 21 in the position shown in Fig. 6,

which position provides for a maximum door open position of 120 degrees. It will be appreciated that by moving the track 30 to the right, as indicated, the length of the stroke of the roller 28 or the distance the roller 28 moves before it abuts the stop 65 is increased, thereby permitting the door to open more than 90 degrees into the 120 degree position. `Of course, if it is desired to back-check Y the door in la 105 degree position, the fastener 84 is disposed within the aligned aperture 89 and opening 80b while the fastener 86 is disposed within the aligned aperture 91 and opening 82b. Although only three pairs of openings are illustrated for checking the door in the 90 degree, 1,05 degree and 120 degree positions, it Will be understood the door may be checked in additional or intermediate positions by providing pairs of additional openings. The maximum door open position is typically selected before installation of the mechanism 20 and the track 30 is secured within the rail 21 in a position corresponding -to the desired back-check or maximum open position. Of course, if after installation it is desired to change the maximum open position, the door 22 is opened thereby permitting access to the fasteners from above the door. The fasteners 84 `and 86 are then unscrewed, the track 30 is longitudinally moved to a position corresponding to the desired maximum open position, and the fasteners 84 and 86 are inserted in the proper apertures and openings to fixedly secure the track 30 to the rail 21.

Referring now to the hold open device 33 shown in Figs. 2, 7, 8, 9, l0 and l1, it is of the resilient type which permits the roller 28 to pass by the device when the door is manually opened but which restrains the roller when the door is manually moved to set the roller adjacent the device. The hold open device 33 is supported by the wall 32 of the track 30 and is located immediately adjacent to the stop 65 to hold the door in a hold open position substantially identical to the maximum door open posi-tion.

As best shown in Fig. 7, the device 33 includes a holder or crank vertically movable in a slot 102 dened in Iand extending through the wall of the track 30, the slot having a narrow portion 102a adjacent the inside surface of the wall 32 and a wide portion 102b including spaced shoulders .101. The holder 100 has a configuration best shown in fFig. 8 and specifically includes a lower base 103 and `an upper body 104 having a central projection 104:1 from which extends a tapered head 105. The upper body 104 is disposed in the wide portion 10217 of the slot while the central projection is disposed in the narrow portion 102a of the slot, with the result that the tapered head extends inwardly toward the axis of the track for selective engagement with the roller 28. The holder 100 is resiliently biased inwardly of the track so that the upper body 104e abuts against the shoulders 2101 by a leaf spring 106 (see Fig. 12) located within a longitudinal chamber 108, the chamber being defined by a horizontal recess 118 provided in the wall 32 of the track 30 and the side 40 of the door rail 21. When the holder 100 is in its effective position, as shown in Fig. 9, it is in an elevated position wherein its tapered head is located 'above the top surface of the bar 44. Thus, as the roller 28 is moved toward the right end of the track by a door opening force, the roller 28 engages the tapered head 105 and deflects the holder 100 outwardly of the track into the position shown in Fig. 1l. The head 105 is moved because the force ofthe leaf spring 106.is overridden by vtrack so that it returns to the position shown in Fig. 2.

The rightwardly moving roller engages the back-check device 31 as described above to stop the opening movement of the door. Thereafter the door is manually moved into a position wherein the roller 28 engages the right side of the head 105 and the manual force is removed from fthe door. Although the door closer 27 acts through the roller 28 to urge the door 22 to move toward its normal door closed position and to urge the roller 28 to move to the left into its original position at the left end of the track 30, the tapered head 105 holds and restrains the roller 28 in the position shown in Figs. and 6. This result obtains because the force ofthe spring 106 urging the tapered head 105 inwardly of the track is greater than the force 'developed by the door closer 27. The roller 28 is restrained by the holder 100 until the door is manually moved to cause the roller 28 to move past the resilient holder 100.

The hold open device 33 is rendered effective and ineffective by an operating assembly 35 which moves the tapered head 105 of the holder 100 into and out of the path of the roller 28. The assembly 35 comprises a crank shaft 112, as best shown in Figs. 9, l0 and l2 on which the holder or crank 100 is rotatably mounted at its base 103. The shaft 112 is rotatably supported within a bore 114 defined transversely in the web of the track 30 and includes a body portion having a length equal to ythe width of the door rail 21, the ends of the body portion being disposed within a pair of longitudinal slots 126 and 128 defined in the sides of the door rail 21. The shaft 112 further includes a pair of extensions 122 and 124 which extend transversely of the sides of the door through longitudinal openings 130 and 132 defined in plates 134 and 136 suitably secured to the sides of the door rail 21. The plates 134 and 136 engage the ends of the body portion of the shaft 112 thereby to prevent transverse movement of the shaft 112. Control knobs 138 and 140 are `fixedly secured to the extensions 122 and 124 to turn the shaft as described below.

Considering particularly the connection between the holder 100 and the crank shaft 112 and referring particularly to Figs. 7, 9, and l2, an offset stem 115 is provided intermediate the ends of the body portion of the shaft 112 and has its axis spaced from the axis of the body port-ion of the shaft 112. The stem 115, as best shown in Fig. l2, is disposed within a T-shaped slot 116 defined within the base 103 of the holder 100, the horizontal portion 116a of the slot 116 having a width slightly greater than the diameter of the stem 115 while the vertical portion 116b of the slot 116 extends between the horizontal portion 116a and the lower edge of the holder 100 to enable the holder 100 to be mounted on the stem 115.

To render the hold open device effective when in its ineffective position shown in Fig. l0, the control knob 138 or 140 is turned 180 degrees into the position shown in Figs. 2 and 9. The offset stem 115 is moved to its uppermost point, thereby to position the tapered head 105 above the upper surface of the bar 44. As described above, the tapered head 105 is now in the path of the roller 28 and in cooperation with the leaf spring 106 restrains the roller in the door hold open position. While the stem 115 moves from its lowermost position on the shaft 112 to its uppermost position it engages the upper wall of the portion 11611 to elevate the tapered head 105 from the position shown in Fig. 10 to the position shown in Fig. 7. Moreover, the stem moves longitudinally in the horizontal slot portion 11641 from the center of the holder 100 to the edge of the holder and back to the center of the holder 100. In order to render the hold open device ineffective, the control knob 138 or 140 is l rotated 180 degrees into its position illustrated in Fig. 10

thereby to lower the tapered head 105 beneath the upper surface of the bar l44 and opposite to the vertical side 44a of the bar 44. While the stem 115 moves from its uppermost position on the shaft 112 to its lowermost position, it engages either of the spaced lower walls of the slot portion 11611 depending upon direction of rotation of the control knob 138 or 140 to lower the tapered head 105 from the position shown in Fig. 9 to the position shown in IFig. l0. As above, the stem moves longitudinally in the horizontal slot portion 116a from the center of the holder to the edge of the holder and back to the center of the holder. However, disassembly of the holder 100 and the stem 115 does not occur since the holder is moved to its lowermost position before the stem rides off either of the lower walls of the slot portion 116er. Similarly, when the control knob 138 or 140 is again rotated, the stem 114 clears the lower wall of the slot portion 116g and engages the upper wall of the slot portion 116:1. Hence, it will be appreciated that the holder 100 is vertically moved only after the control knob 138 or 140 is turned several degrees because of the lost motion drive connection between the holder 100 and the stern 115. In any event, when the holder 100 is in its lowermost position, the leaf spring 106 urges the tapered head 10S inwardly of the track, but since the tapered head is out of the path of the roller 28 no engagement is effected between the roller 23 and the head 105.

The door 22 may be held open in different open positions by securing the track 30 to the door in selected positions corresponding to the open positions. In fact, the

' hold open device 33 being supported on the track 30 is movable with the longitudinally movable track 30 so that the hold open position of the door is adjustable in exactly the same manner as the back-check position of the door, described -in detail above.

While the invention has been described in connection With a particular embodiment thereof, if will be understood that various modifications may be made thereon which are within the true spirit and scope of the invention as defined in the appended claims.

What is claimed as new and is desired to be secured by Letters Patent of the United States is:

1. A door hold open mechanism for use with a door and with an arm connection supported from a door frame, said arm connection including a connector, said mechanism comprising a track structure adapted to be located fin said door for receiving and supporting the connector at a first level for movement to and fro therein upon opening and closing of the door, a vertical slot being provided in a side wall of said track structure, holder means having a holder element vertically slidable within said slot and biased horizontally inwardly of the tracl(` structure, means for moving said holder element to said first level within said track structure into the path of said connector to restrain the movement of said connector and to a second level within said track structure out of the path of said connector to render said holder element ineffective.

2. Apparatus for holding a door open comprising a track structure adapted to be located in said door and Iincluding a wall, a connector movable in said track structure, an opening being provided in the wall of said track structure, a holder having a tapered portion mounted in said opening for Vertical movement between a first and second position, means for resiliently biasing said holder inwardly of said track structure in said first and second positions, said tapered portion being disposed in the path of the connector in the first position of said holder, and means for moving said holder into said first position for engagement with said connector in order to hold the connector against a door closing force exerted on tho connector and for moving said holder into said second position out of engagement with said connector.

3. A door hold open mechanism for holding a door open, said mechanism comprising an arm supported from a door frame, a connector connected to said arm, a track structure adapted to be located in said door for slidably receiving and supporting the connector at a first level in said track structure, a slot being provided in a wall of said track structure, a holder member having a head vertically movable in said slot and extending inwardly of said track structure, resilient spring means for biasing said holder inwardly of said track structure at all times irrespective of its vertical position, eccentric cam means connected to said holder to move said head to said first level in the path of said connector to restrain said connector from movement and to a second level within said track structure out of the path of said connector, said eccentric cam means being supported from said track structure and having an operating shaft extending outwardly of the door through an opening in the door.

4. Apparatus for use with a door adapted to be actuated hy a door closer and provided with a recess along an edge thereof, comprising a track structure adapted to be adjustably positioned in said door recess and movable longitudinally along the edge of the door, means for securing said track structure in -a selected position along the door edge, a connector movable in said track structure, an arm interconnecting said connector and said closer mechanism, stop means secured to said movable track structure for limiting the movement of said connector, a holder supported by a wall of said track structure and vertically movable into and out of the path of said connector, resilient means for urging said holder inwardly of said track structure, means including a crank shaft for moving said holder into and out of the path of said connector, a longitudinal slot being provided in said door for accommodating said shaft throughout the limits of the adjustable positioning of said track structure in said door to permit said track structure and operating shaft to be moved longitudinally of the door together and permit manipulation of said shaft through said slot regardless of the relative position of the track structure and the door.

References Cited in the le of this patent UNITED STATES PATENTS 1,749,905 Comstock Mar. 11, 1930 1,821,5711 Norton Sept. 1, 1931 2,108,891 Johnson Feb. 22, 1938 2,497,830 Bernhard Feb. 14, 1950 2,904,819 Seaman Sept. 22, 1959 2,905,565 Flin-t Sept. 23, 1959

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