US3009545A - Jail locking devices - Google Patents

Description

1961 c. F. YOUNG JAIL LOCKING DEVICES 6 Sheets-Sheet 1 Filed May 14, 1956 uh mb InvenTar: Charles]? vn,

Nov. 21, 1961 c. F. YOUNG JAIL LOCKING DEVICES 6 Sheets-Sheet 2 Filed May 14, 1956 D 2 w M m V F D w II N a I! h 1 N, ma ,7 b

Nov. 21, 1961 C YOUNG 3,009,545

JAIL LOCKING DEVICES Filed May 14, 1956 6 Sheets-Sheet 3 7 I 4% M W m l 2 w F a E 3;

G i r' m i f0" Y o Q5? 6. 3 mi r lnvenror'. CpaHesFyoung,

6 SheetsSheet- 4 Nov. 21, 1961 c. F. YOUNG JAIL LOCKING DEVICES Filed May 14, 1956 Nov. 21, 1961 c F YOUNG JAIL LOCKING DEVICES 6 Sheets-Sheet 5 Filed May 14, 1956 Invenior 9 mm a WLM @4 m1 m W Nov. 21, 1961, c. F. YOUNG JAIL LOCKING DEVICES 6 Sheets-Sheet 6 Filed May 14, 1956 Fig. \"l

Inveni'or: 69 9 Ohafles Fyoung,

by J

- Pa tented Nov. 21, 1961 3,009,545 JAIL LOCKING DEVICES Charles F. Young, Covington, Ky., assignor to Folger Adam, Joliet, 111., a co-partnership composed of Folger Adam, Charles L. Fisher, and John W. Browning Filed May 14, 1956, Ser. No. 584,758 13 Claims. (Cl. 189-7) This invention relates to improvements in jail locking devices, and the like. By this term I also define various forms of locking devices and controls therefor, such as the locking devices for various security rooms, hospitalization rooms and areas, and other rooms and areas which are to be securely locked and the locking devices of which are to be controlled either locally or from remote control positions, either singly or in gangs of several or many locking devices;

Broadly speaking the present improvements relate to that type of locking devices in which there is provided a reversible door operating rod or bar, sometimes also called a travel bar, to which one or more doors may be selectively connected so that such selected doors will be caused to travel with the bar during its movements; and in which there is also provided a reversible control bar which may be set into any one of several selected positions. In each selected position of this control bar such bar effects proper relative connecting operations between the travel bar and that door which corresponds to such control bar, there being one control bar for each individual door, or for a small group of doors all of which are to be brought at the same time into the same condition of connection or disconnection to the travel bar. Usually a control bar is provided for each individual door, so that there are, in such case, as many control bars as there are doors to be operated by the travel bar.

In its simplest form there would be provided a travel bar for each individual doors locking mechanism, and likewise a control bar for each such doors mechanism. Generally, however a single travel bar serves a plurality of doors, constituting a gang of doors, with separate control bars for the individual doors. Under these conditions such travel bar must move a number of doors simultaneously during. its movements, the number depending on how many of the doors of the gang are connected to such travel bar during such movement. Accordingly, a large force must be exerted to effect such travel bar movement, the maximum force being required when all of the doors of the gang are connected to the travel bar. Accordingly, I have made provision for motor driving such travel bar, such motor drive being reversible to move the travel bar in either its door opening or its door closing direction. Conveniently, such travel bar is mounted for rectilinear reciprocation in direction parallel to the direction of door travel. I have also provided suitable limit switches for terminating supply of current to such motor at each intended limit of its travel,

with corresponding reversal of current supply connections to the motor, so that when the current supply circuit is again closed the direction of motor drive will be reversed as required.

I have provided a reciprocable locking bar for each door to be controlled and locked or unlocked. Preferably such locking bar is mounted for vertical reciprocations within a post or pilaster adjacent to one terminus of door travel, generally adjacent to the door open position. Means are provided for interengaging such locking bar with the door to which it relates so that when such locking bar is in one position the door is locked by such bar, and when such bar is in another position the door is not locked by such bar. These are the fully locked and fully unlocked positions. When in the fully locked position I have also made provision for either dead-locking the locking bar so that it cannot be moved from its so-locked position until the control bar has been moved to another position, known as the key-locked? position. In that key-locked position of the control bar the door is still locked, but the locking bar may be shifted to the door unlocking position by use of a suitable key inserted into a key locking unit, generally located in or adjacent to the pilaster within which the locking bar is housed.

Interlocking provisions are made between the locking bar of each door and such door so that the door may be locked in either its fully closed or its fully opened position. For this purpose such interlocking provisions are so arranged that when the door reaches its fully closed position the locking bar may move immediately to its door locking position, and such that when the door reaches its fully opened position the locking bar may move to its door locked open position; but I have made provision such that this door open locking operation does not require as much movement of the locking bar in its looking direction as it executes during its locking movement when the door is locked in its closed position. That is to say, the locking bar is capable of executing a full extent of its locking movement when the door is in its fully closed position, but such locking bar executes a smaller extent of locking movement when the door is in its fully open but locked open position; but in the latter case such lesser extent of locking bar movement is never theless sufiicient to elfect locking of the door in its open position.

I have herein disclosed various means to effect all of the foregoing operations, and to make operative the objectives above stated.

Conveniently all of of the control bars for the gang of doors are brought to a control box location from which point they may be individually adjusted to such positions as correspond to the desired door functioning and looking operations to be effected for such gang. When a single travel bar is provided for operating all of the doors of such gang the driving motor for such travel bar may also be located in or adjacent to such control box if desired. Suitable means are provided for the individual control bars to effect their movements to intended consuitable key lock on or adjacent to the locking bar In connection with the pilaster. In this position the door is still locked against opening by manual force, but the door is not as yet connected to the travel bar. Also, in this position the locking bar has not been raised any amount above its fully lowered position, but it is released so that it can be fully raised by the key-operation if desired; (C), Locking bar raised position, but without engagement of the travel bar with the corresponding door, so that although the door is now unlocked and can be manually opened or moved, it is still unconnected to the travel bar; (D), Door connected to the travel bar, it being still unlocked by the movement of the control bar through the position C just above described.

It is here noted that in both of positions C and B above the locking bar has been released for movement in the unlocking direction, the difierence, between the conditions of the parts for these two positions arising from the fact that in position B the locking bar is still in a door locking position, although now released so that it can be key-raised to the unlocking position, whereas in position C the locking bar has additionally been actually fully raised to actually unlock the door without need of using a key at the location of the key-lock. It is here noted that thus the door is actually locked in either of positions A and B, locked closed in the first case, and locked open in the second case (the door having been moved to its open position between the times when the control bar was in its positions A and B"). I have also so arranged the parts that under the conditions of position B the locking bar is actually slightly raised above its position of condition A, but not enough to unlock the door under the conditions of position B. This slight upward shift of the locking bar between its positions A and B enables me to effect operations of a signalling element by which either of the two control bar and locking bar positions may be differentiated from the other position of such bar, such signalling element being, for example, a Signal lamp located at a convenient location. Thus separate signals may be operated for the two conditions of locked closed and locked open.

The engagement of the travel bar with the selected door is effected by movement of the control bar of such door to its position D, being the position of the control bar most removed from its original position A. Until that position D" is attained the movement of the travel bar is not communicated to the door. The engagement of the selected door with the travel bar is effected by raising an interlocking lug element which is carried by the travel bar, with the selected door moving element. This door moving element comprises a portion of a lost-motion device, such lost-motion device including a driving ele ment which is thus connected to the travel bar as above explained, and a driven element. The door is connected to such driven element and therefore follows the movement of the driving element after a lost-motion movement permitted by such lost-motion element. But the operations of raising or permitting lowering of the locking bar of such door are controlled directly by the driving element of such lost-motion device. The operations of raising or permitting lowering of the interlocking lug element above referred to are controlled by the control bar of the door in question. The means to effect such control includes a guide plate which is normally in lowered position, but is raised by the final movement of the control bar to its position D. Until that position of the control bar is attained such guide plat is in lowered position, and does not effect engagement of the door in question with the travel bar. In case it should be desired to effect connection of the door with the travel bar when the control bar is not in its position D such operation and result could not be directly attained by the control bar itself. However, I have made special provision for enabling the guard or warden to shift the guide plate to its position for engaging the door with the travel bar even when the control bar is not in its position D, so that under special conditions the door may then be operated by movement of the travel bar even when the control bar is not in its position D. If, for example, it should be desired to move the door in question by power delivered by the travel bar and when the control bar was in either of its positions B or C, so that the locking bar would be or could be raised to its unlocking position, it would be necessary to shift the guide plate to its lug raising position notwithstanding that the control bar was not then in position to do this by its normal function.

I have made provision for thus effecting movement of the guide plate to its raised position irrespective of the presence of the control bar at its position D. I have made such provision for either manual or remote control of the guide plate in the above manner. Such manual control includes a connection from the guide plate directly to the control box of the guard or warden, or to other selected point of control. Such remote control element is electrical, and preferably includes a solenoid operated linkage by which the selected doors guide plate may be raised into its door lug engaging position. I have also so arranged the parts that when the guide plate has thus been raised to its operative position it will be retained in such position by a cam arrangement of parts. Thus, it is not necessary to maintain a guide plate operating force in effect after such plate has once been raised to its door engaging position. It is to be noted, however, that means must be provided for afterwards releasing such guide plate from its so-raised position when necessary to effect other operations, as when the control bar is returned to its position A, in order to disconnect the door from the travel bar when such door is returned to its colsed and locked closed position, and to then enable dead-locking the so-closed door. I have provided means to release such guide plate whenever the control bar is moved to its position A so that such guide bar may then fall to its normal position in which the door is disengaged from the travel bar.

In connection with the foregoing it is also noted that under various operating conditions it is desirable to effect release of such guide plate from its cam sustained condition by the movement of the door itself, in either its opening or its closing movement. I have provided means to effect these results, such means including a trigger element which is engaged by the lost-motion device. This trigger element is so constructed that it does not interfere with the desired movements of the lost-motion device, even when the control bar of the door in question is in its position D, as will hereinafter appear.

Other objects and uses of the invention will appear from a detailed description of the same, which consists in the features of construction, and combinations of parts hereinafter described and claimed.

In the drawings:

FIGURE 1 shows a front elevational view of a typical installation embodying the features of my present invention, this figure showing a single door structure and control and operating parts therefor, such door being shown in its closed and dead-locked position and condition with the control bar for such door, and the travel bar, in their corresponding positions; and in this figure the central part of the structure has been cut away to reduce the size of the figure vertically, but not horizontally;

FIGURE 2 shows a vertical planar section taken parallel to the elevational view of FIGURE 1, but this figure shows only the upper portion of the structure, namely, the various operating and control elements, but in the same conditions as such elements are shown in FIGURE 1'; and FIGURE 2 is a section taken on the lines 22 of FIGURES 6, 7, 8, 10, and 11, looking in the directions of the arrows;

FIGURES 3, 4, and 5, are figures similar to that of FIGURE 2, but taken on corresponding section lines as indicated on FIGURES 10 to 13, inclusive;

' FIGURE 6 is a horizontal planar section taken on the lines 64' of FIGURES 1 to 4, inclusive, and to 13, inclusive, looking in the directions of the arrows in the several figures;

FIGURES 7, 8, and 9 are figures similar to that of FIGURE 6, but taken on corresponding section lines as indicated on FIGURES 1 to 4, inclusive, and 10 to 13, inclusive;

FIGURE 10 is a vertical cross-section taken on the lines 10-10 of FIGURES 1 to 9, inclusive, looking in the directions of the arrows in the several figures;

FIGURES 11, 12, and 13, are figures similar to that of FIGURE 10, but taken on corresponding section lines as indicated on FIGURES 1 to 9, inclusive;

FIGURE 14 is a fragmentary vertical facial section taken on the lines 14-14 of FIGURES ll, 12, 21, and 22, looking in the directions of the arrows; and this figure shows the travel bar and also the cam means for raising and permitting lowering of the guide bar by which the element which engages the'travel bar with the element of the lost-motion device, to which element the'door is lostmotion connected, is raised and permitted to lower according to the need of connecting the door to the travel bar or permitting disconnection of such par-ts to occur; and in this figure the guide bar is in its right-hand and lowered position corresponding to disengagement of the door from the travel bar; and this figure also shows the trigger element by which such guide bar is released from its cam sustained position when necessary;

FIGURE 15 shows a fragmentary horizontal section taken on the lines 15-15 of FIGURES 2, 4, 12, and 14, looking in the directions of the arrows in the several figures;

FIGURE 16 shows a back face view of the lost-motion device with its two sections shown in their normal doorclosed and dead-locked condition; and this figure shows the two cam elements at the ends of the primary or driving section of the lost-motion device;

FIGURE 17 shows a front face view corresponding to FIGURE 16;

FIGURE 18 shows a top or plan view corresponding to FIGURES 16 and 17;

FIGURE 19 shows a right-hand end view of the lostmotion device, when considering such device as shown in FIGURES 17 and 18;

FIGURE 20 shows a left-hand end view corresponding to FIGURE 19;

FIGURE 21 shows a fragmentary vertical section taken on the line 21--21 of FIGURE 2, looking in the direction of the arrows; and this figure may also be considered as a partial showing of the elements shown in FIGURE 11 without showing of other elements to avoid needless confusion in the showing of the parts to which FIGURE 21 refers;

FIGURE 22 shows a fragmentary vertical section similar to that of FIGURE 21, but at a slightly different section position; and FIGURES 21 and 22 show the ele- 'ments directly related to the guide plate and the lug element which engages the door with the travel bar when desired to effect such engagement; and in FIGURE 21 the said lug element is in its lowered position for disengagement from the door (through disengagement from the proper element of the lost-motion device), and in FIGURE 22 the guide plate has been raised to bring about engagement of the said lug element with the proper element of the lost-motion device;

FIGURE 23 shows a face view of the trigger element by which the guide plate is kicked rightwardly to release it from sustaining by the cam elements, when the lostmotion device passes such trigger element during the travels of the lost-motion device when connected to the travel bar;

FIGURE 24 shows a cross-section taken on the line 24'-24 of FIGURE 23, looking in the direction of the arrows;

FIGURE 25 shows a fragmentary face view of the travel bar, the lug, and a portion of the guide plate, with the latter in its lowered position, so that the lug element will not be raised sufiiciently to engage with the abutments carried by the driven element of the lost-motion device, so that the door will not be moved with movement of the travel bar; I

FIGURE 26 shows a view similar to that of FIGURE 25, but with the guide plate raised so that the lug element will travel horizontally in its raised position, high enough to cause such lug element to be engaged with the driving element of the lost-motion device, and thus cause drive of the door with the travel bar movements;

Referring first to FIGURE 1, I have therein shown the features of my present invention in connection with a single sliding door for a single cell of a gang of cells, but this is done merely by way of illustration, since-the controls and operations for a gang of cells would involve primarily a repetition or duplication of parts in many cases. The sliding door is shown at 50, and the proximate cell enclosures are shown at 51 and 52. The door is shown in its closed position, opening movement being towards the right to carry the left-hand or front edge 53 of the door away from the door frame member 54. The righthand door frame member comprises the pilaster 55 within which is carried the vertically movable locking bar 56 according to conventional practice. As hereinafter shown, the present improvements include means to lock the top edge portion of the door in either its door-closed or its door-opened position. If desired, means may also be provided for locking the lower edge portion of the door, especially when in its door-closed position. Such means may, for example, take the form of such a locking arrangement as shown in Letters Patent of the United States, No. 2,148,521, issued February 28, 1939 on the application of Folger Adam, or such as shown in Letters" Patent of the United States No. 2,288,666, issued July 7, 1942, also to Folger Adam. I have not herein disclosed the details of any such lower door edge locking device, as the same comprises no portion of the present invention,

Above the upper edge of the door and the proximate cell enclosure elements I have shown a horizontal plate 57 which provides the floor of a longitudinally extending passage within which the various cell door controlling and operating elements, with the exception of the control box elements, are conveniently accommodated. The back wall of this passage is provided by the vertical plate 58, and a horizontal top plate 59 encloses said passage at its top. Suitable front enclosing plates are also provided for such passage, but I have not herein shown the same, as they constitute no portion of the details of the present invention.

The door is suspended by an L-shaped bracket 60 having its lower horizontal leg 61 connectedto the top of the door and its vertical leg 62 extending upwardly to a position above the plate 57 (see FIGURES 10 and 11);

A rail 63 is set onto the top face of the plate 57 and extends lengthwise far enough to accomodate the full travels of the door; Two flanged wheels 64 and 65 are journalled on studs secured to the vertical leg 62, such wheels travelling on the rail. The form of the bracket 60 is such that the points of load suspension on the rail are directly above the center of gravity of the door, so that the door will naturally hang with its face vertical according to conventional practice. However, I have, in FIGURE 1, shown a downwardly extending plate 66 secured to the lower edge of the door and travelling just inside of a guide flange 67 secured to the permanent structure. Thus said flange plate 66 is prevented from outswing, retaining the door against outswing, and said plate 66 travels in a narrow channel formed in the permanent structure. The locking of the lower edge of the door may be by engagement with such plate 66, if desired, and according to the teachings of the previously referred to Adam patents.

It is evident that opening and closing movements of the door may be effected by producing needed forces against the vertical leg 62 of the bracket element 60. I have secured a block or the like 68 to the back face of such leg 62 (see FIGURES 6, 7, 8, 10, 11, and 16 to 20, inclusive). This block extends rearwardly and is secured to one element (the driven element) of a lost-motion device, presently to be described in detail, and shown in detail in FIGURES 16 to 20, inclusive.

Extending lengthwise of the structure, and far enough to operate all of the doors of the gang to be operated, is the travel bar 69. This travel bar is periodically supported by rollers 70 journalled in brackets 71 secured to the back plate 58, so that said travel bar may be reciprocated through sulficient movement to fully open and close the door or doors which it serves. Such travel bar may be moved either manually or by power. It is brought through the end wall 72 of the cell proximate to the control station, indicated generally at 73. By way of illustration of a power drive for such travel bar I have shown the following arrangements:

A drive motor 74 is secured to the end wall 72 and drives a worm gear reducer unit 75 having the input shaft 76 and the output shaft 77. The motor shaft 73 is connected to the input shaft of the reducer through the coupling 79. The output shaft 77 carries a sprocket 80 which drives another sprocket 81 by the chain 82. Connected to the driven sprocket 81 or to a plate secured thereto is a pin 83 which travels in the longitudinal slot 84 of the swinging arm 85. This arm is pivoted to the end wall at 86 by the bracket 87. With this arrangement the free end of the swinging arm will execute a travel between its two extremes dependent on the physical characteristics of the lever arrangement thus provided. It is also evident that a full rock of such arm in either direction will be executed by somewhat more or less than a half revolution of the sprocket 81 depending on whether the drive from the sprocket is executed on the top half or the bottom half of the sprockets rotation. In any case, drive from one extreme limit of swing to the other should be effected with motor start and stop at proper times to terminate the drive to the travel bar with such travel bar at its desired termini of movement. Such motor controls may be either fully manual, or may be produced in connection with suitable limit switch arrangements, accordng to conventional practices.

The upper end of the swinging arm is pivotally connected to a link 88 by the pin 89. This link extends through the end wall 72 and carries a small pinion at its free end, which pinion meshes with a stationary rack bar 90 carried by a bracket 91 secured to the face of the back plate 58; and said pinion also meshes with a companion rack bar 92 secured to the lower edge of the travel bar as well shown in FIGURES l, 2, 3, 4, 6 and 10. The pinion is designated 93 and is shown in FIG- URES l, 2, and 6. With this arrangement it is seen that the movement of the travel bar produced by such rack and pinion drive is double the amount of movement of the link 88, so that a. corresponding benefit is secured mechanically in the driving arrangements.

Extending lengthwise of the structure is a control bar corresponding to each of the cells to be controlled. In FIGURES l, 2, 3, and 4 I have shown three of these controls, designated as 94, 94 and 94 corresponding to controls for three cell doors. These control bars are conveniently all supported by the brackets 71 already referred to by suitable rollers 95. (In FIGURES 1, 10, ll, 12, and 13 I have shown only the control bar 94, for convenience, but the other such bars would appear to the left of such bar 94, if illustrated in such figures.)

Each control bar extends lengthwise of the longitudinally extending passage far enough to serve the control elements of the corresponding cell door. All of these control bars extend through the end wall 72 into the control space 73 already referred to. A rock arm 96 is provided for each control bar, such rock arm being pivoted at 97 to a bracket 98 carried by the end wall 72. The upper end of such rock arm is pivotally connected to the end of the corresponding control bar as shown at 99. Conveniently another hand control rock arm or handle element 100 is pivotally connected at 101 to a bracket 102 carried by the end wall, and a pin and slot connection 103-104 connects the upper end of such handle element to the lower end of the rock arm 96, so that back and forth movements of the handle portion 105 of the element 100 produce corresponding movements of the control bar in question.

Since the foregoing arrangement provides for back and forth shifts of the control bar of the cell door in question and to which such control bar relates, it is de sirable to provide for ensuring accurate positioning of the control bar at each of its intended control positions. To this end I have provided a light arm 106 pivotally connected at 107 to a bracket 108 secured to the end wall 72. Such arm swings adjacent to the face of the arm 96 and is provided with a. series of notches 109 in its lower edge, spaced according to the several control positions of the control bar at which the several control operations are to occur. These four notches (as shown) correspond to the positions A, B, C, and D, previously referred to. The arm 96 is then provided with a stud 110 which may be engaged with the corresponding notch when the arms 96 and 100 have been brought to the exact control position desired. In the several figures the control bar is shown as being shifted rightwardly its extreme limit of movement to the Deadlocked position or position A just referred to. Leftward movement of the handle 10S and corresponding leftward movement of the control bar will bring said bar successively to its positions B, C, and D, at each of which a notch engagement may be produced if desired to retain the control bar at such position.

As shown in FIGURES 1, 6, 7, 8, 9, 10, 12, and 13, the vertically moveable locking bar for the cell in question passes close to the control bar for such cell, so that the interengagements may be readily made between such locking and control bars. A cam slotted plate 111 is secured to each con-trol bar opposite to the general location at which the locking bar for such cell passes such control bar. Such locking bar is then provided with a forwardly extending stud 112 which extends through the cam slot 113 of the plate 111 so that horizontal movements of the control bar produce desired vertical movements of the locking bar or produce desired locking of such locking bar against its vertical movement. The cam positions of such cam slot are designated in FIGURE 1 as A', B, C, and R', respectively. It is seen that at cam position A the locking bar is locked in its lowered position so that it cannot be raised; that at cam position B the cam slot is of full height so that the locking bar may be fully raised, as by a key-operation, but that in this position such locking bar has not yet been actually raised by cam action; that at cam position C' the locking bar has been fully raised, but, as will presently appear, the guide plate has not yet been raised to cause engagement of the travel bar with the driving element of the lost-motion device; and that at cam position D the locking bar is still fully raised and the control bar has been moved farther towards the left, such farther movement being used to cause the guide plate to be raised in order to cause driving connection of the travel bar with the driving element of the lost-motion device for door operation by travel bar movement. These four positions correspond to the notching of the stud 110 into the several notches 109 already referred to.

Reference is now had to FIGURES 16 to 22, inclusive, which illustrate the lost-motion device, and related parts. This device includes the front plate 114 to which the block 68 already referred to is secured. Thus said front plate comprises in effect a rearward continuation of the door hanger elements and travels back and forth exactly with such door hanger elements and the door itself. Just to the rear of this front plate 114 is located the angle-bar 115 having its vertical leg 116 in facial engagement with the plate 114, and its horizontal leg 117 extending rearwardly as shown in various of the figures. Two studs 118 and 119 extend rearwardly from the plate 114 to which they are secured, and extend through horizontal slots 120 and 121 of the vertical leg 116. Conveniently the washers 122 are located on these studs against the inside face of the vertical leg, and are held in place by the cross-pins 123. Thus the angle-bar and the plate 114 are retained in engagement with each other but the angle bar may be shifted a limited amount of lost-motion with respect to the plate114, such lost-motion being determined, in the present case by the shorter slot 120. Conveniently the clips 124 and 125 are set over the upper edges of the plate 114 and vertical leg 116 to assist in retaining these parts in smooth operating relationship, while not interfering with the desired freedom of lostmotion movement.

To the upper edge of the vertical leg 116 there are secured the two abutment members 126 and 127, best shown in FIGURES 16, 17, and 18. Such connection of these abutments to said vertical leg is conveniently effected by brackets 128 as shown in FIGURE 16, in particular. It is here noted that each of these abutment members is provided with a vertical inner face abutment surface 129 which may be slightly relieved in its lower portion; and each of these abutment members is also provided with an upwardly and inwardly slanting face 130 which terminates at the location of the clearance between the two vertical surfaces 129. Accordingly, a driving lug which is set down or raised up between the two surfaces 129 will drive the vertical leg of the angle bar when such lug is moved horizontally, to thus take up any lost-motion between the angle bar 115 and the front plate 114, after which any further horizontal movement of such lug will drive both the angle bar and the plate 114 (and the block 68 and the door), during any further horizontal travel of such lug. It is now noted that the angle bar 115 is the driving element of the lost-motion device, and that the front plate 114 is the driven element of such lost-motion device.

Secured to the rear edge of the horizontal leg 117 of the angle bar 115 is the upwardly extending trackway bar 131. The central portion of this trackway bar is higher than its two end portions 132 and 133 so that when shifting the driving element of the lost-motion device in either direction from its extreme limit of movement a cam lifting effect is produced on a cam follower in engagement with such trackway bar. Such cam follower comprises a forwardly extending stud or pin 134 secured to the vertical locking bar as well shown in FIG- URES 2, 3, 4, 5, 6, 7, and 8. Preferably the front end portion of such stud is squared as well shown in said figures. Back of such squared portion, however, the stud is round or provided with an anti-friction element such as a roller, in position to ride on the top surface of the trackway bar 131. It is here noted that the end portions 132 and 133 of the trackway bar may serve to support the stud 134 to thereby limit the lowering movement of the locking bar when either one of such end portions comes into registry with such stud; and it also is noted that the end portion 132 of such trackway bar is lower than the end portion 133 thereof, so that when the locking bar stud 134 is engaged with such end portion 133 the locking bar is supported somewhat higher than when the stud is in engagement with the end portion 132.

The rear or inner end portion of the stud 119 which is secured to the front plate 114 is squared as indicated in FIGURE 16, and said stud is so positioned lengthwise of the front plate 114 that when the driving element of the lost-motion device has been driven fully leftwardly, having previously taken up the lost-motion and thus also driven the door leftwardly, the rear end of the stud 119 will be located just to the left of the stud 134 of the locking bar. Also, that such stud 134 will at such time have been lowered or allowed to lower by riding down the cam surface to the end portion 132 of the trackway bar, to bring such locking bar stud into interfering engagement with the stud 119 of the plate 114. Thus, under these conditions the locking bar will have been allowed to fully lower, and its stud will have moved into locking engagement with the stud 119. Accordingly the driven element of the lost-motion device will now be locked against rightward movement, thus also locking the door against such rightward movement, the door now being in its closed and locked closed condition.

The rear portion of the stud 118 is also squared and extends back into alignment with the locking bar stud 134. This stud 118 is so located and spaced from the stud 119 previously referred to, that when the driving element of the lost-motion device has been moved rightwardly far enough to take up the lost motion, and to fully open the door, said stud 118 may stand farenough rightwardly to occupy position to the right of the locking bar stud 134. Also, at such time said locking bar stud is allowed to move down into position to the left of the lost-motion device stud 118 and thus block leftward movement of such stud 118 as long as such condition obtains. Thus the door is locked in its open position. It

is noted, however, that since the end portion 133 of the trackway bar is slightly higher than the end portion 132 thereof, the down movement of the locking bar permitted when the door is thus locked open is somewhat less than such down movement when the door is locked closed. Due to this fact it is possible to provide for the giving of separate signals to show the door locked open condition and the door locked closed condition, by use of microswitches actuated by the locking bars position.

The foregoing analyses of operations have been predicated on the assumption that the various movements areproduced by forces coming from the plate 116, being the vertical leg of the angle bar of the lost-motion device. It is next necessary to show how the drive to this element 116 is delivered from the travel bar when said bar is moved endwise, and with the control bar in its proper control position. That control position is designated D in previous explanations.

A flange plate 135 is secured to the front face of the travel bar. This plate is shown in various figures including FIGURES l, 2, 3, 6, 7, and others. This plate includes the side sections 136 and 137 which lie fiat against and are secured to the front face of the travel bar;

and said plate 135 includes the forwardly extending ofi'set portion 138 which serves, in conjunction with the travel bar face, to provide a rectangular vertical opening within which the vertically movable lug element 137 is accommodated. Conveniently this lug element includes a block 138 to the back face of which is secured a sheet metal element 139. The lower end of the block 138 is extended forwardly as a distinct driving lug 140 of size to be received between the two abutment members 126 and 127 when the lug element is raised into door driving position, such lug element being normally in its lowered position,

as shown in FIGURE 21. The raised driving position is shown in FIGURE 22. When in its lowered position the lug 140 may travel horizontally beneath the abutment members, without transmitting motion to the driving ele! ment of the lost-motion device (and the door); when in its raised position the lug 140 will engage one of the abutment members 126 or 127 and thus produce drive to tal lug flange 141 is vertically below the elevation of the control bar, as well shown in FIGURES 11 and 12, An

angle bar 142 has its vertical leg 143 secured to the back plate 58, either directly, or, as shown in FIGURES 10 to 13, inclusive, and 21 and 22, with a spacer and supporting block 144 set between such vertical leg and the front face of said back plate. The horizontal guide plate lug flange supporting trackway 145 of such angle bar extends forwardly above the general location of the travel bar as well shown in FIGURES 21 and 22. Said horizontal leg constitutes a guide plate lug flange supporting trackway. A spacer block 146 is seated against the front face of the angle bar vertical leg 143 and secured in place. Reference is now invited to FIGURES 14 and 15 in particular:

A long guide plate or lug flange supporting trackway 147 is set against the front face of such spacer block 146 (there being several such spacer blocks spaced apart along the length of the vertical leg 143 as well shown in FIGURES l4 and 15, designated as 146 146 and 146, respectively), and such lug flange supporting trackway is longitudinally movable with respect to the spacer blocks 146- and 146, with provision for producing a vertical component of movement during such longitudinal movement. To this end I have provided the cam slots 148 and 149 in the element 147, together with studs 150 and 151 secured to the spacer blocks 146" and 146, respectively. These studs are headed so that they serve to retain the element 147 in place against the spacer blocks while allowing the desired freedom of longitudinal and vertical movement of said element 147. The cam slots are provided with the downwardly slanting portions slanting towards the right, together with short horizontal dwells at their right-hand ends, as well shown in FIGURE 14, and elsewhere.

Normally the element 147 stands in its rightwardly moved position, as shown in FIGURES 14 and 15, wherein, due to the forms of the cam slots, such element 147 is in its lowered position. By drawing said element 147 leftwardly, however, it will be given an upward movement due to the form of the cam slots, followed by final riding of the horizontal dwells on the studs. Thus, at the conclusion of the leftward movement of said element 147 it will be sustained in its raised position by such dwells, and will require a slight rightward movement to disengage the dwells from the studs and permit the element 147 to move down. When it has commenced such downward movement it will continue to its full downward position, due to the slant of the cam slots, unless otherwise restrained.

The cam slots 148 and 149 are of vertical throw suflicient to raise the upper trackway edge of the element 147 from a position below the horizontal guide plate lug flange supporting trackway 145 of the angle bar 142 (see FIGURES 21 and 22), to a position sufliciently close to said trackway 145 so that the horizontal lug flange 141 of the element 137 can be transferred to engagement with the top face of such trackway 145. Such transfer is executed when the travel bar and the element 135 are at one extreme of their movement or the other, it being noted that the trackway 145 is of suflicient length to ensure retaining the lug element 138 in its raised position during the complete door opening or closing movement. Conveniently the element 147 is located below the trackway 145 as shown in FIGURES 11, 12, 21, and 22, and elsewhere, so that provision must be made to effect the transfer of the horizontal lug flange 141 upwardly slightly higher than the highest permissible position of the element 147. Such provision is shown in FIG- URES 25 and 26, wherein it is seen that the lug flange 141 is provided with a shallow block 152 on its under face, the right and left-hand ends of such block being wedge shaped as shown at 153 and 154 in FIGURES 25 and 26. Also, the ends of the horizontal trackway 145 are tapered downwardly through the distance of their thicknesses, so that as the element 137 comes to the location of either end of the trackway 145 the horizontal lug flange 141 is caused to ride up onto the top surface of such trackway 145, being retained thereon during the full travel to the opposite end of such trackway.

Since travel of the travel bar with the lug element 138 in its raised position ensures engagement of the driving element of the lost-motion device with the travel bar, while travel bar movement with such lug element 133 in its lowered position permits travel bar movement without corresponding travel of the driving element of the lost-motion device, it is seen that shift of the element 147 effects the needed change of driving condition from the one effect to the other. The arrangements for controlling the shifting of the element 147 are as follows:

A downwardly extending lug is secured to the control bar 94 leftwardly of the locations of the lug flange supporting trackway 147 the lug element 138, and related parts. This lug 155 is shown in FIGURES 1, 2, 3, 4, 6, 7, 11, 14, 15, and elsewhere. Due to structural interferences I have shown the left-hand end of the trackway 147 as extended leftwardly with an offset formation, as shown at 147 in FIGURE 15, the arrangement there shown including a short section welded to the left-hand end of the main part of such trackway 147. The downwardly extending lug 155 is aligned with this guide plate extension 147 so that a linkage can be provided between the parts. This linkage comprises the open slotted wire element 156 having its left-hand end connected to the lower end portion of the lug 155 by the pin 157, another pin 158 carried by the left-hand end of the trackway element being accommodated within the slotted opening of such wire element. The atrangement is such that when the control bar is at its righthand extreme of movement, being its position A, for the dead-locked condition, the lug 155 has moved far enough to the right to engage the left-hand end of the extension 147 and cause the whole element 147-- 147* to be shifted rightwardly, thus driving said element to a position where it is no longer sustained in its elevated condition by the dwells of its cam slots 148 and 149, so that said element 147147 will then move on down by gravity to its lowermost and most rightwardly position. Actually, however, the rightward position of the control bar for the control condition A is such that the lug 155 will directly engage the left-hand end of the extension 147, and will continue to follow rightward movement of said element 147 to its extreme righthand position, as shown in FIGURES 2, 3, 4, 14, and 15, and elsewhere. Thus there is positive assurance that when the control bar has been moved to its A position the lug flange supporting trackway 147 will have been positively driven down to ensure discontinuance of drivmg connection between the travel bar and the door corresponding to such control bar. Then, if the travel bar should be operated for any door movement of a door other than that now being discussed, such travel bar movement could not possibly be communicated to the door for which the element 147 had been forced down. That door would then remain in its dead-locked condition irrespective of other door operations being produced or desired.

Further examination of FIGURES 4, l4, and 15, in particular shows that due to the loop form of the link 156 by which the lug 155 is connected to the extension 147 there must be a predetermined amount of control bar movement leftwardly before the right-hand end of the loop will engage the pin 158 on the extension 147*. Until that condition occurs the element 147 will remain 1n its lowered position, with corresponding non-connection of the door of such control bar with the travel bar. The open loop portion is of length such that such engagement will not occur until the control bar has been moved to the C position, and then further movement of the control bar to the D" position will result in drawing the element 147 leftwardly far enough to cause the travel bar to be drivingly connected to the driving element of the lost-motion device, and thence to the door itself. Thus various control operations with the door now in question un-connected to the travel bar, and

correspondingly various travel bar operations, may be effected in which the door now in question is not involved, as long as the control bar is not shifted completely to its D position, to cause engagement of the travel bar with the door elements now in question.

Usually the change of control bar setting to its pos1- tion D will occur when the door is at one or the other of its extreme movement positions-either fully closed or fully opened. Under these conditions normal functioning of the engagement or disengagement of parts will occur since the co-operating parts will then be in their intended co-operative relations. This is likewise true when the the control bar is moved away from its position D with the door in its fully opened or fully closed position. However, it is to be expected that on various occasions the control bar will be moved to or from its D position when the door is not at its extreme position. Usually, also, such change of control bar position will occur when the travel bar is in either its fully dooropened position, or its fully door-closed position. When both of such normal conditions obtain-door position corresponding to travel bar position, and both at one extreme or the other, with shift of the control bar to or from its D position under such ideal door and travel bar conditionsit is evident that the engagement of the lug element 144 with or disengagement of such lug ele ment from the driving element of the lost-motion device will occur normally, since the abutment members 126 and 127 will under such conditions be properly registered with the location of such lug element. a

It may, however, happen that when the desired operations are to occur, or when the control bar position is changed, such ideal relations of parts will not obtain. This might be the case, for example, if, after opening the door it were to be moved to a partially open position; or if, under manual door operation, permitted by the key-operation, the door were to be only partially opened. In such cases, and others, the door would occupy an intermediate position when the control bar was shifted to or from its D position, so that the abutments would not be in position to receive the lug element 140 between them. Further exploring these conditions, if the door were in such an intermediate position when the control bar was moved to its D position (assuming the travel bar were then at one extreme of its movement or the other), the lug element 138 would be picked up as soon as the travel bar movement commenced, thus bringing the lower lug portion 140 into alignment with the abutment members 126 and 127, as shown in FIGURE 22. Then, as the travel bar was moved to carry its lug elements towards the location of such abutment members the lug portion 140 would ride up over the slanting surfaces 130, and when correct reg istry with the parts was attained such lug element would then drop down between the abutment elements and engage the driving element of the lost-motion device correctly with the travel'bar. Thereafter normal drive from the travel bar to the door would be ensured for the remainder of the trip. Thus the travel bar is able to pick up a door at a point intermediate between its two extreme positions. It is to be noted, however, that once such a picking up operation has occurred it is not possible to disengage the travel bar from such door until the extreme door position in one direction or the other has been attained. This is true since if the lug element 141 is riding on the top face of the guide plate lug flange supporting trackway 145 it is not possible to bring about lowering of the lug element 141 until an extreme movement position has been attained. Neither can the lug element be raised to its elevation to ride on the trackway 145 except at an extreme limit of movement of the travel bar in one direction or the other.

The arrangements thus far described provide for the positive restoration of the lug flange supporting trackway 147 to its lowered position by full shift of the control bar to its A position. Thus, with the so-far described arrangements the release and return of such element 147 to its lowered position, and the corresponding disengagement of the lug element 138 from its operational connection to the driving element of the lost-rno tion device and door would occur only when the control bar was next moved back to its door-closed and deadlocked condition. It is thus apparent that if any traverses of the travelling bar for partial movements should occur after the control bar had been once set to its D position (to thereby raise the guide plate), and before return of such control bar to its A position, such back and forth traverses of the travelling bar would cause like traverses of the door itself. I have accordingly made provision against this contingency, and to ensure that a traverse of the driving element of the lost-motion device in either direction after a setting of the element 147, shall positively release such element, allowing it to fall to its lowered position, or positively driving it to such position, during such traverse, and before the completion of such traverse. Then, upon completion of such traverse the lug element 138 will fall to its non-engaging position, so that a subsequent traverse of the travel bar will not effect any further door operation until the control bar is again shifted to its D position (or until some other purposeful operation has been performed to effect shift of the element 147 to its raised position, as will be hereinafter described).

The means to effect return of the element 147 to its lowered position during such subsequent traverse of the travel bar is as follows:

' A trigger element 159 is pivoted at the point 160 to the back plate 58 or to a spacer block 161 which is in turn secured to a back plate. This trigger element is shown in FIGURES 2, 3, 4, 5, 11, 12, and 14, and in FUGRE 15 the upper end 166 of such trigger is also shown, and in detail in FIGURES 23 and 24. It comprises a two section unit including the sections 162 and 163 which are journalled with respect to each other on the hollow rivet 164, which hollow rivet also serves as the journal set onto the pivot pin or stud 160. The element 162 is provided with a small radius journal part which rides on the hollow rivet, and with an outwardly extending finger 165 having the tangentially extending contact lug 166. The element 163 comprises a small radius hub portion which is journalled on the hollow rivet, and a curved actuating finger 167. This actuating finger is so formed as to provide the downwardly extending knee 168 from which the lower edge of such finger extends upwardly at an angle in each direction. A stop lug 169 is secured to the face of the element 162, and an outwardly or radially extending finger 170 is formed on the element 162 to lie to the right of such stop lug. A rather stiff spring 171 has its central portion lying against the underside of the hollow rivet (and may be provided with one or more convolutions encircling the hollow rivet), and the ends of this spring bear against the two pins 172 and 173 which extend axially from the two elements 162 and 163. Thus, by pre-loading such spring as it is set into place on the unit there is produced a constantly acting force tending to rock the element 162 and its stop 169 clockwise, and a balancing force tending to rock the element 163 and its finger 170 counterclockwise and thus tending to retain the finger 170 strongly against the stop 169. Thus the unit normally retains the overall form shown in FIGURE 23 and other figures,

and the stiffness of the spring is sufficient to normally eifect the desired results, presently to be stated.

The spacer block 146 already referred to is connected to the back face of the element 147 leaving a space between such spacer block and the leftward spacer block 146 The finger 165 and lug 166 extend behind the element 147 and upwardly into the space between the spacer blocks 146 and 146'. The clearance between said spacer blocks is sufficient to allow for free swings of said parts 165 and 166 through such amounts of movement as may be needed to allow the desired functions to be performed. When the element 147 is in its rightward or lowered position as shown in FIGURE 14 the finger and lug 165166 stand in the position shown at N" in FIGURE 14 with the contact lug in engagement with the left face of the spacer block 146. Under these conditions the other finger 167 stands in the position N shown in FIGURE 14. Under these conditions, also, the spring has retained the finger 170 and stop 169 in engagement with each other.

When the element 147 is drawn leftwardly to cause it to rise for the purposes already explained the spacer block 146 will be moved leftwardly to cause the finger and lug 165166 to assume a position such as shown at 0 in FIGURE 14, and this will also cause the other finger 167 and its knee 168 to assume a position such as shown at 0' in FIGURE 14. By causing a pin or stud to press horizontally against either side or edge surface of the finger 167 (by approach from either direction) such finger will tend to rise and thus to drive the guide plate rightwardly to bring about its release and lowering, the pre-loading of the spring 171 being sufficient to ensure this result.

The driven element of the lost-motion device, being the plate 114 has a rearwardly extending lug 174 which extends past the plate 116, as shown in FIGURES 16, 18, 19, and 21. This lug is also shown in various other figures. The rear end of this lug preferably carries an anti-friction roller 175. This lug and its roller are located at an elevation such that the roller must pass the knee 168 of the trigger element already described during traverse of the lost-motion device and the door in either direction, door opening or door closing. The position of this lug and roller are shown in FIGURE 14 in their relation to the knee 168 of the finger 167. It will be seen that in order for such lug and roller to complete their traverse (with corresponding door traverse completion) it is necessary to rock the trigger element clockwise sufficiently to allow the lug and roller to pass the knee. Thus the finger 167 must rise to the position N to permit this result to occur. Such rock of the finger 167 will correspondingly rock the finger 165 and contact lug 166 due to spring force, thus also restoring the guide plate rightwardly as desired. Thus it is seen that I have made provision for positively restoring the element 147 during such traverses.

Now it appears that when the control bar stands in its D position, being the most leftwardly moved position of such control bar, the element 147 has been drawn leftwardly also by reason of taking up the lost-motion in the loop or link 156, so that as long as the control bar remains or is held in such position D it is impossible for said element 147 to be shifted rightwardly for release to its lowered position. Thus without special provision it would be improssible for the trigger to be rocked clockwise as just previously explained by passage of the lug 174 and roller 175, and the traverse operation could not be completed. In other words the parts would be jammed and probably broken by exertion of an undue force. But it is thus seen that no full traverse of the door could be produced with the control bar in its D" position. However, under the conditions thus assumed the traversing operation is made possible by reason of the two part form of the trigger element, since the spring connection between the two fingers 165 and 167 permits the finger 167 to be forced up by an increased pressure developed by the operation of the travel bar, driving the lost-motion device and door to the desired destination. This operation is possible for traverse in either direction.

It may sometimes be desired to effect raising of the element 147 to cause engagement of the lug element 138 with the driving element of the lost-motion device, and

16 thus to produce door traverse even when the control bar for such door has not been moved to its D position. I have made provision for such special operation by either a manual control effected at the control stand 73 or by remote electrical control. Such special provisions are as follows:

In FIGURES 2, 3, and 4, and also partially shown in FIGURES 1 and 14 and 15 I have shown a small finger piece 176 located at the control stand and pivoted at 177 to a small bracket carried by the end wall 72. A tension wire 179 is connected to this finger piece and extends through a small tube 180 through the end wall to connection with a light rod 181. This rod 181 connects to another rod 182 which terminates in a loop 183. A pin 184 carried by the end portion of the guide plate extension extends through such loop. The loop is of such length that the various back and forth movements of the element 147 may be executed without interference from such loop or the finger piece 176. However, in a special case, by pressing the finger piece downwardly sufficiently the rods and the loop will be drawn leftwardly far enough to shift the element 147 leftward and thus bring about its rise for the purpose of causing the travel bar to become engaged drivingly with the corresponding door. It is noted that in order to eflfect this operation the extension 147 should be offset preferably rearwardly far enough so that the end of such extension would not interfere with leftward movement of the element 147 needed to elfect the desired rise of such plate by the manual operation just explained. Under these conditions the restoring movement of the control bar to its A position would not of itself efiect release of such element 147, but such release would be produced by the next traverse movement of the driving element of the lost motion device.

I have also shown the solenoid 185 secured to the back plate 58 preferably above the control bar or bars. The armature 186 of this solenoid is connected to a light rock arm 187 pivoted at 188 to a bracket 189 carried by the back plate 58. The lower end of this rock arm is connected to the rod 182 already referred to. Accordingly, excitation of the solenoid will effect leftward shift of the element 147 in manner to the manual shift already explained, and for similar purposes.

It is noted that various electrical controls may be provided in connection with various of the elements herein disclosed. Accordingly I have shown the microswitches A", B", and C adjacent to the control bar and which are operated by small lugs or irregularities formed on or carried by such control bar in such positions that said microswitches are actuated when the control bar is in its positions A, B, and C, respectively. Suitable signal elements may be controlled by such microswitches to indicate corresponding control bar positions. I have also shown, adjacent to the upper portion of the locking bar the microswitches D", E, and F" which will be actuated by small lugs or irregularities carried by such locking bar. These microswitches and lugs, etc., are so located that signals will be given corresponding to the locking bar positions of Deadlocked, partially raised but not unlocked, and Unlocked already referred to herein. Suitable signal elements such as lamps may be actuated by such microswitches to indicate the corresponding locking bar positions.

Suitable limit switches may be provided for terminating current supply to the drive motor at each intended terminal of drive corresponding to full traverse of the travel bar, with corresponding reversal of circuit connections for the motor so that the next current supply to the motor will cause motor drive in the opposite direction. It is deemed unnecessary to herein illustrate these various circuit arrangements as various combinations of circuitry can be devised for assuring the desired operations, within the discretion of the designer.

I claim:

1. In a door locking device, the combination of a horizontally movable door, a vertically movable locking bar, means to guide said locking bar during vertical movements between a door locking position and a door nonlocking position, interengageable elements connected to the'door and to the locking bar, said elements being formed for locking engagement with each other when the door is in closed position and with the locking bar in its locking position, and being formed for non-locking engagement with each other when the door is in closed position and with the locking bar in its non-locking position, a movable locking bar control member including a cam element, means to guide said locking bar control member and cam element for movement of the cam element in a path of travel adjacent to the locking bar, a travel bar movable in a path of travel substantially parallel to the door opening and closing movements and in proximity to the vertical locking bar, a cam follower connected to the locking bar and engageable with the cam element, the control member and the cam element being movable between a dead-locked First position, a key-operated Second position, a locking bar unlocked Third position, and a travel bar connected Fourth position in sequential relationship, the cam element and cam follower being relatively formed and including means to retain the locking bar in position for locking engagement of the interengageable elements with each other and nonmovable from said position when the cam element is in said dead-lock First position, and to make ineflective said locking bar non-movable retaining means when the cam element is in said key locked Second position, and to move the locking bar to non-locking position when the locking bar control member and cam element are moved from the key locked Second position to the locking bar unlocked Third position, and to retain the locking bar in door unlocking position when the cam element is in said rocking bar unlocked Fourth position, interengageable elements on the travel bar and on the door comprising a lug element on the travel bar and a socket element on the door in position for engagement by said travel bar lug element for driving connection of the door to the travel bar, means to movably connect the lug element to the travel bar permitting movement of said lug element between a door-driving position of lug element engagement with the door socket element, and a non-doordriving position of non-engagement of the lug element with the door socket, together with means to move the lug element between said door driving position and said non-door-driving position, said lug element moving means comprising a horizontal lug flange connected to the lug element, a lug flange supporting trackway substantially parallel to the travel bar, means to support said lug flange supporting trackway for movement thereof towards and from the travel bar between a lug flange supporting position corresponding to the non-doordriving position of the lug element and a lug flange supporting position corresponding to the door-driving position of the lug element, means to maintain said trackway substantially parallel to the travel bar during such movement of such trackway, a stationary guide plate lug flange supporting trackway in position for lug flange support with the lug element in said door-driving position, the movable lug flange supporting trackway being of length to sustain the lug flange element in the door-driving position during full travel of the travel bar and the lug element between door fully closed and fully open positions and the stationary guide plate lug flange supporting trackway being of less length than said movable lug flange supporting trackway and terminating at locations to permit transfer of the lug flange element between the movable lug flange supporting trackwayaand the stationary guide plate trackway when the travel bar and the lug element are at corresponding door fully closed or door fully open positions, and connections-between the movable lug flange supporting trackway and the movable locking bar control member constituted for movement of the movable lug flange supporting trackway to the lug flange supporting position which corresponds to the door driving position of such lug element when the movable locking bar control member is in the travel bar connected Fourth position.

2. Means as defined in claim 1, wherein the means which supports the lug flange supporting trackway for movement thereof towards and from the travel bar includes means to provide endwise movement of said trackway and movement of said trackway towards and from the travel bar simultaneously during movement of the movable locking bar control member between the locking bar unlocked Third position and the travel bar connected Fourth position.

3. Means as defined in claim 2, wherein the means which supports the lug flange supporting trackway for said movement towards and from the travel bar is constituted for movement of the lug flange supporting trackway between a position of non-transfer of the'lug element flange with respect to the stationary guide plate trackway and aposition of transfer of said lug element flange with respect to said stationary guide plate trackway during the movement of the locking bar control member between the locking bar unlocked Third position and the travel bar connected Fourth position.

4. Means as defined in claim 3, wherein the connections between the movable lug flange supporting trackway and the movable locking bar control member include a lost-motion element permitting movement of the locking bar control member between the locking bar dead-locked First position and the locking bar unlocked Third position without movement of the movable lug flange supporting trackway and permitting movement of the locking bar control member between the locking bar unlocked Fourth position and the locking bar key-operated Second position without movement of said trackway.

5. Means as defined in claim 4, wherein the movement of the lug flange supporting trackway with respect to the travel bar during locking bar control member movement between the key-operated Second position and the dead-locked First position is a movement of said trackway from a position of lug flange transfer between said trackway and the stationary guide plate trackway and a position of non-lug flange transfer between said trackways.

6. Means as defined in claim 2, together with supplemental means to produce movement of the movable lug flange supporting trackway endwise for lug flange registry with respect to the stationary guide plate lug supporting trackway when the locking bar control member is in position other than said locking bar Fourth position.

7. Means as defined in claim 6, wherein said other position of the locking bar control member is the locking bar unlocked Third position.

8. Means as defined in claim 6, wherein said supplemental means is manual.

9. Means as defined in claim 6, wherein said supplemental means is electrical.

10. Means as defined in claim 2, wherein the means which supports the horizontal lug flange supporting track-' way and produces movement thereof towards and from the travel bar with simultaneous endwise movement of such trackway, includes cooperating cam and cam 'fol-' 7 lower elements one of which is fixed in position with respect to said trackway, said .cam element including a dwell, said dwell being in position to retain the said trackway in position for lug flange transfer registry with the stationary guide plate lug flange supporting trackway.

11. Means-as defined in-claim 10, wherein said dwell serves to retain the movable trackway in said position of 12. Means as defined in claim 11, together with means to shift the movable lug flange supporting trackway endwise a distance to release the cam follower and dwell trackway.

References Cited in the file of this patent engagement, with corresponding movement of the mov- 17,403 able lug flange supporting trackway to a position of non- 5 6541275 registry with the stationary guide plate lug flange support- 772,469 .ing trackway. 1,966,422

13. Means as defined in claim 12, wherein said endwise 2304551 shifting means comprises a portion of the connection 2,290,063 between the locking bar control member and the movable 10 UNITED STATES PATENTS Youngblood Aug. 13, 1929 Pauly July 24, 1900 Mayer Oct. 18, 1904 Young July 10, 1934 Manly Jan. 4, 1938 Montgomery et al July 14, 1942 Smith et a1. May 21, 1957 Adam July 1, 1958

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