US1840623A - Jail door locking mechanism - Google Patents

Description

Jan. 12, 1932. H, D GARBER 1,840,623

JAIL DOOR LOCKING MECHANISM \Filed Jan. 8; 1951 4 Sheets-Sheet 1 INVENTOR Jan. 12, 1932. GARBER 1,840,623

JAIL DOOR LOCKING MECHANISM Filed Jan. 8, 1931 4 Shets-Sheet 2 INVENTOR ATTO RN EYS 1932- 'H. D. GARBER JAIL DOOR LOCKING MECHANISM ATTORN EYS H. D. GARBER JAIL D OOR LOCKING MECHANISM Jan. 12 1932.

4 Sheets-Sheet 4 Filed Jan. 8, 1931 l1 H HHH H h I I I I ulHu HHI I IIH I I IH IWI I IQ II I I I I n IIIIIIIIIIIIII IIIIIIIIIIL |IIIII III II III IIIIII II.

INVENTOR ATTORN EYS Patented Jan. 12, 1932 srA Es PATENT OFFICE HARRY D. GARBER, OF CUYAHOGA FALLS, OHIO, ASSIGNOR TO THE VAN DORN IRON WORKS COMPANY, OF CLEVELAND OHIO, A CORPORATION OF OHIO JAIL DOOR LOCKING MECHANISM Application filed January 8, 1931. Serial No. 507,417.

. This invention relates to jail doorlocking mechanisms for application to a plurality of cells having sliding doors; The invention contemplates the control of all doors at all times, and to this end includes control means, operable from a remote location, for moving any or all doors between open and closed positions, for locking any or all doors in closed position at a number of door points, and for locking any or all doors in open position.

The invention also includes means for indicating to the operator at the remote location, the position and locked or unlocked condition of all doors.

Means have been devised heretofore for such purposes but this invention embraces simpler, more positive, and less expensive apparatus therefor.

The exact nature of the invention together with further objects and advantages thereof will be apparent from the following description taken in connection with the accompanying drawings, in which Fig. 1 is a view in elevation, taken as from the front of a cell showing the cell door and its control mechanism in locked open position, parts being broken away to show details of construction; Figs. 2 and 3 are similar views of the same parts but showing in locked, closed and unlocked positions respectively; Figs. 4 and 5 are enlarged details of parts appearing in Figs. 1-3 showing such parts in open and locked closed positions respectively; Fig. '6 is a sectional elevation as in the plane of line ,"66, Fig. 4, showing details of the door mounting: Fig. 7 is a horizontal section looking upwardly upon the top member of the door as in the plane of line 77. 4; Fi 8 is a side elevation of the operator-operated part of the door control mechanism; Fig. 9

along an overhead track bar 4 (Fig. 6.) To this. end a hanger 5, having a pair of wheels 6, is mounted on the track bar 4, and the door 1 is supported from the hanger by hanger connection bars 7. The bars 7 may be bent as shown Fig. 6 and a fixed shield 7a provided so as to prevent the insertion of wires etc. in attempts to am the mechanism to be described.

The cell unit illustrated Figs. 1 and 3 may be one of a row so that the track bar 4 may conveniently extend along the row to carry all of the doors thereof. The door hangers and associated parts to be described are all enclosed inatrackbox 8 and thus secured against unlicensed access. Since the mechanism for each door of the row is identical except as to the connection therewith from the operators controls. but one cell unit is illustrated here.

Extending along the row of cells within the track box is a pull bar 9 suitably mounted in brackets 10 for sliding movement for each door. The pull bar has secured thereon a gap nut 11. At the end of the row of cells means are provided for shifting the pull bar 9 and hence all of the gap nuts 11 thereon a d stance equal to that of door travel.

The means here shown comprise a master lever 12 rigidly associated with a pinion 13. The pinion 13 meshes with a rack 14 mounted for vertical movement. The upper end of this rack 14 meshes with a pinion 15 rigidly associated with a pull bar crank 16. The pull bar 9 is provided on its end with rack teeth 17 and there opposite is provided a fixed rack 18. A gear 19 is arranged to intermesh the both racks 17 and 18, and isconnected by agear arm 20 withthe pull bar crank.

As shown in Fig. 1 the pull bar 9 is at its extreme left-hand position with the lever 12 extending downwardly, the rack 14 in its extreme uppermost position. Obviously swinging the lever 12 outwardly and upwardly will lower the rack 14, as in Fig. 3, which will throw the pull bar crank 16 clockwise and move the rack bar 9 to the right, as shown Fig. 3.

Each door hanger is provided with a guide bracket 21 in which is vertically movable, a latch bolt 22. Each latch bolt is thus movable with its door. Each gap nut 11 has a pair of spaced projections 23, 24, providing therebetween a notch 25 to receive the latch bolt 22 of its door. Each gap nut is so located on the rack bar 9 that when in engagement with its latch bolt 22 the gap nut increment thus imparted to i'is door will slide the door between fully opened and fully closed positions. Thus if the latch bolt of any door be in the notch 25 of the corresponding gap nut that door will be opened or closed accordingly as the lever 12 is raised or lowered; and this applies to all the doors of the row.

It remains then to provide means for controlling the elevation of the latch bolt, to control connection of the door with the pull bar. For such purpose the latch bolt is provided with a roller 26 bearing upon a latch bolt bar 27. The latch bolt bar extends along the path of movement of its latch bolt, and is mounted for vertical movement as in the fixed supports 28. 7

A pair of hell cranks 29, 30 are mounted upon fixed pivots, one adjacent and beneath each end of the'latch bolt' bar 27. Each of these bell cranks has an upwardly extending arm, and these arms are joined by a bell crank connecting rod 31. The rear bell crank 30 has a rearwardly extending arm associated with a leg 32 downwardly extending from the rear end of the latch bolt bar 27 with a lost motion connection'provided by the slot 33. The other bell crank 29 has a forwardly extendin arm connected with the forward end of the latch bolt bar 27 by a link 34 and lost motion connection provided by the slot 35 in a bracket 36 secured upon the latch bolt bar 27. By the arrangementv described it will be apparent that lateral shifting of the bell crank connecting rod 31 will cause tilting of the latch bolt bar 27 forwardly or rearwardly as the connecting rod is shifted forwardly or rearwardly.

The connecting rod 31 extends well for-.

wardly of the bell crank 29 and is there carried on an upwardly extending arm of a third or front bell crank 37. Operator-operated means, which will later be described, are provided for shifting the connecting rods 31 and thus the three bell cranks associated therewith, between three positions. The forward position shown Fi 1 is locked open position the rearward position shown Fig. 2 is locked closed position; and the intermediate position shown Fig. 3 is unlocked position.

The parts are so proportioned and arranged that when the bell crank 31 is in intermediate or unlocked position the latch bolt bar .2? is approximately horizontal and so locked that the latch bolt 22 may rest in the bottom of the notch 25 of its gap nut 11. The projections 23 and 24: of the gap nut are chamfered as indicated so that when the latch bolt bar is so positioned but the latch bolt is not in registry with the gap nut, movement of the gap nut to registry with the latch bolt will cause the latch bolt to ride up and over the near gap nut projection and drop into the recess 25 thus coupling the door with the pull bar 9. These proportions provide also that when the connecting rod 31 is shifted to the left, when the door is in fully open position the latch bolt 22 will clear the gap nut but when the door is in closed position the latch bolt will drop into the gap nut. And when the connecting rod 31 is shifted to the right and the door is in open position the latch bolt will drop into the gap nut but when the door'is in closed position the latch bolt will be positioned to clear the lower forward projection 23 of the gap nut but not the larger rearward projection 24 thereof, as appears Fig. 2. The lost motion connection 35 in the support 28 includes stop means limiting the lowering motion of its end of the latch bolt bar 27. To this end, as appears Fig. 2, the middle bell crank 29 when moving between forward and intermediate positions is inoperative upon the latch bolt bar, the link 34 at such time merely moving in the slot 35. Similarly stop means are provided for the leg 32 so that the rear end of the latch bolt bar does not follow the motion of the rear bell crank between intermediate and forward positions of the connecting rod 31.

The middle bell crank 29 has a rearwardly extending leg having connection with the upper end of a vertical lock bolt 38 as indicated Figs. 4 and 6. This lock bolt is mounted for vertical sliding movement in the front wall of the cell. It is provided with a notch as indicated Fig. 6, registrable when the bell crank 29 is in intermediate position, with a plate 39 extending along the door at the top of the latter. The plate 39 is provided at each end with a notch 40, these notches 40 being so positioned that one of them registers with the bolt 38 when the door is in either fully open or fully closed positions. At the bottom of the door a similar plate 39a is provided having a single notch 40 aligned with the rearward notch 40 of the plate 39, so that when the door is in closed position this notch 40 of the lower plate 39a will register with the bolt 38. The bolt 38 may have a notch at its lower end to clear the lower plate 39a similarly as'the bolt is notched to clear the upper plate 39 as shown Fig. 6.

It will be apparent that when the connecting rod 31 is in intermediate position as shown 3 and a the bolt 38 will be so positioned that its notches register with the two plates 39 and 39a of the door so that the door is free for opening and closing movement. When the connecting rod is moved to forward position, that of Fig. 1, the bolt 38 will be raised to enter one of the notches 40 of the upper door plate 39, dependent upon whether the door is fully open or fully closed, and will thus lock the door in such position.

Similarly when the door is closed and the connecting rod 31 moved rearwardly as Figs. 2 and 5, the bolt 38 will be lowered to engage both plates 39 and 39a locking the door at both its top and its bottom. It will be noted that owing to the described interlocking arrangement between the vertical lock bolt 38 and the door the connecting rod 31 mustbe in intermediate position before the door can be moved to any intermediate position; and the connecting rod cannot be moved from its intermediate position until the door is in one of its extreme positions, that is, fully open or fully closed. Thus the position of the connecting rod is a positive indication of the described conditions at the door.

At the front end of the hanger 5 is provided a projection 41 and a front lock bolt 42 is mounted on a fixed pivot to engage the projection 41 and thus secure the hanger when the door is in fully closed position as in Fig. 5. This front lock bolt is associated with a rearwardly extending arm on the front bell crank 37 as by a link 43 so that when the connecting rod 31 is in rearward position the door will be secured by the front lock bolt as shown in Fig. 5; and when the connecting rod is in intermediate position the front lock bolt will be tilted to ust clear its hanger prim jection as in Fig. 4.

Associated with the front lock'bolt 42 is a lock bolt release stop 44. This release stop, as best shown Figs. 4 and 5, is in the form of a bell crank mounted for coaxial movement with the front lock bolt. The release stop has a lower arm extending rearwardly, with a bend 45 extending below. the hook end of the lock bolt 42; and has an upper arm engageable by the hanger 5 as the door completes its closing movement. The arrangement of the parts is such that as the door attains fully closed position the lock bolt release stop will be engaged by the door hanger and its projection 45 moved to a position such that when the door is fully closed the front lock bolt will engage the same when the connecting rod 31 is in interT mediate position; so that when the door is closed the connecting rod 31 cannot be moved forwardly to its extreme forward position. This forward position is locked open position. Thus when the door is closed its control mechanism cannot be moved to locked open position.

Adjacent the front lock is a lock bolt stop and tripper plunger generally designated by the reference character 46. This device comprises a fixed housing 47 in which a plunger 48 is slidable. The plunger carries upon its end a projection 49, and the plunger 48 is yieldably urged by a spring 50 to move this projection 49 under the end of the front lock bolt 42 to thus prevent counterclockwise or looking motion of the front lock bolt as indicated Fig. 4.

By this means when the front look bolt is so engaged, the connecting rod 31 is positively prevented from shifting to the right so that the parts being so proportioned and arranged, the vertical lock bolt 38 is sup ported off the door plates 39 so that the door may be freely moved without the vertical lock bolts dragging thereupon.

The plunger 48 extends beyond its housing 47 as indicated at 51. The door hanger 5 carries a tripper pin 52 in aligned relation with the plunger 48 and the locations of the parts are such that when the door is closed, the plunger 48 will be engaged by the tripper .in nci "n acrii 1Ll Lie 3 a l noved agai st its s i ui l l projection 49 clears the lock bolt as indicated Fig. 5. By this arrangement it will be apparent that the connecting rod 31 cannot be shifted to locked closed position until the door is fully closed.

- From all of the above it can be seen that entire control of the door may be had by shifting of the pull bar 9 and of the con.- necting rod 31, the former controlling the position of the door locking device. Assur ing the parts in the position of Fig. 3 the door may be closed by the pull bar 9. The door may then be retained in closed position by its gap nut 11. Once the door is closed, shifting of its connecting rod 31 to the right, Figs. 15, shifts the vertical lock bolt to lock the door top and bottom at its rear edge, and also shifts the front lock bolt 42 to lock the door through its hanger. The door is thus locked closed in four different locations. Or if the pull bar is wanted for shifting of another door of the row of cells, the first door is still locked in three different places. To open the door by hand as suming the pull bar already moved to the right, it is only necessary to shift the connecting rod 31 to intermediate position whereupon the door is free for hand opening and closing. Supposing the door to be unlocked when the pull bar is in closed position, moving the connecting rod 31 to intermediate position allows the latch bolt to drop into the gap nut as well as unlocks the door so that the door may be positively opened and thereafter closed by shifting of the pull bar. Supposing the door moved to fully opened position, it may be there locked by shifting the connecting rod to the left in these figures which raises the vertical lock bolt to lock the door at its top. Such action at the same time frees the latch bolt from the gap nut so that the pull bar becomes avail-- able for use with other doors leaving this door locked open.

For convenient control of the connecting rod 31 and of the door locking device a control lever 53 is mounted at the end of the cell row. This lever is arranged for verticai movement and is associated with the connecting rod to impart corresponding movement necting rod 31 to so balance the parts.

thereto between three positions of adjustment. To this enc. a rod 54 leads from the control lever to one end of a bell crank 55. This bell crank is mounted upon a bracket 56 for movement thereon about a horizontal axis. Connected with the connecting rod 31 is a rod 57 extending along the track box to connection with one arm or a bell crank 58 carried upon vertical pin 59. The opposite ends of the bell cranks 55 and 58 are connected by a link 60. The connections at the ends of this link are of ball and socket type so that motion will be positively transmitted in both directions between the lever 53 and its connecting rod. 31. Since there are a number of connecting rods 31, one for each door, there are a number of rods 57 each leading to a bell crank upon the pin 59 and a number of control levers 53 each connected with its bell crank upon the pin 59 as shown Figs. 8 and 10, in the same manner as that described for the first unit. the described arrangement each control lever has three positions the ugper bein locked position, the

' lower locked open position, and the third position intermediate the first two, which is unlocked position. Each control lever 53 is balanced to upper or locked position by the weight of its vertical lock bolt Where such weight is not sufficient to so balance the control lever, as where the cell is so removed from the control lever that the rod 57 is of considerable length, spring means such as indicat-ed at may be associated with its con- At any rate since connection between each control lever and its connecting rod 31 is positive, the position of each control lever will accurately indicate the locked or unlocked condition of its door. it may noted here that similarly the position of the lever 12 adjacent the control levers will, of course, indicate the position of the pull rod 9 and hus of all ot the gap nuts.

A panel plate 62 as shown 8 and 9 may e provided with slots 68 through which the handle ends of the evers 58 may project, and which plate may bear the inscription shown indicating the door conditions for the respective lever positions.

For each con rol lever there is mounted upon this plate 62 hook means for retaining the lever in unlocked and locked open positions when desired. Sucn hooks are shown Fig. 9. Each is in the form of a bell crank pivoted for tree motion as at with an arm portion extending upwardly oi the pivot and alongside its slot 63. This arm has two projections 66 and 67 extending across the slot 63 to engage and retain the lever in locked open unlocked positions respectively. Each hook member has a portion extending laterally of the pivot (i l and of considerable size so that the arm portion 65 is balanced toward control lever engaging position. The projections 66 and 67 are bevelled as indicated so that when the hook member is free upon its pivot or downward motion of the control lever will be automatically followed by engagement by one or the other of the projections 66, 67, dependent upon the position to which the control lever is moved. Each hook member portion 68 is provided with an opening 69 in which extends a fixed pin 70. The pin may be carried by the plate 62, and the opening 69 is larger than the pin; and the object of the rangement is merely to limit motion of the hook upon its pivot 64.

Each hook member portion 68 has a second opening 71 so located with respect to the pivot 64 as to have a horizontal component of motion. In each of these openings 71 extends a pin 72. Each pin 72 of one row of hook members is fixed upon a bar 73 mounted in suitable brackets as at 7 etor endwise sliding movement. here there are two rows of hook members as shown there are two bars 78 and these are connected for simultaneous control as by bell cranks 7 5 and connecting rod 76. The connecting rod 76 is provided with a hook release knob 77 extending through a slot in the plate 62 to be accessible to the operator. The parts are so proportioned and arranged that when thebars 73 are positioned as shown Fig. 9, clearance between the pin 72 and openings 71 will allow tree motion of all of the hook members upon their pivots 64. Shifting of the knob 77 downwardly will shift the bars 73 to the left from their shown position and move all of the hook members to release their control levers. Thus assuming the several control levers in various positions of adj ustmcnt and there retained by their hook members, a simple downward motion of the knob 77 will cause release of all hook members to pro-- vide simultaneous locking of all of the doors.

In order that all of the doors may be unlocked simultaneously or locked open simultaneously, a common control is provided for moving the levers downwardly. To this end a master release bar 7 8 is arranged back of the plate 62 across and above each row of control levers 53. These release bars are rigidly interassociated and mounted in any convenlent manner for vertical movement through the range of control lever movement. For causing such movement a master release lever 79 is provided having a rigidly associated gear 80. This gear meshes with a pinion 81 which in turn meshes with the teeth of a rack 82. The rack is backed against the pinion 81 by a roller 83 and the rack extends upwardly to rigid connection with the bars 78. By this arrangement when the lever 7 9 is swung outwardly and upwardly the bars 78 will be moved downwardly and will consequently correspondingly move all of the control levers. The downward or shown position of iob the lever .79 allows free movement of all the control levers between their three positions. Swing of the lever 7 9 outwardly moves the control levers 53 to unlocked position, and swing of the lever 79 upwardly therefrom moves the control levers farther downwardly to locked open position.

The control levers 53, and the master lever 12 and the mast-er release lever 7 9 are all enclosed in a box housing S l. This housing is provided with a front cover which may be hinged to swing outwardly to provide access to the levers. At any rate the proportions of the box 84 are such that the cover 85 cannot be closed when either of the levers 12 or 7 9 are in outstanding position. Thus since the master lever 12 must be down all of the gap nuts must bein door closed position, and since the master release lever must be down the master release bar must be up before the cover can be closed. Therefore, if the knob 77 has been moved downwardly before closing of the cover the closed cover will indicate that all of the doors of the cell row are closed and locked.

What I claim is:

1. In apparatus of the class described for controlling a sliding jail door, a gap nut mounted for operator-controlled movement along the path of said door, said gap nut having a pair of projections, one extending beyond the other, a latch bolt carried by the doorand movable into the notch provided between said projections whereby the motion of the gap nut may be imparted to the door, a pair of hell cranks, an operator-controlled connecting rod arranged for coincident control of said bell cranks, a latch bolt bar for controlling the position of said latch bolt on said door, and means connecting said latch bolt bar with said bell cranks, one end with each, the bell crank arrangement being such that opposite ends of the latch bolt bar will be moved in opposite directions thereby, and such that, when the door is in fully closed position the latch bolt may not be withdrawn to clear both of said gap nut projections, but when the door is in another position the latch bolt may be withdrawn to clear said gap nut.

52. In apparatus of the class described for controlling a sliding jail door carried by a hanger, a pair of bell cranks, a latch bolt bar having connection therewith, one end with each bell crank, a front bell crank, a lock bolt pivotally mounted to engage said hanger when the door is in closed position, said lock bolt having connection with said front bell crank, an operator-controlled connecting rod connected with all three of said bell cranks for coincident control thereof.

3. In apparatus of the class described for controlling a sliding jail door carried by a hanger, a pair of hell cranks, a latch bolt bar having connection therewith, one end with each bell crank, a front bell crank, a lock bolt pivotally mounted to engage said hanger when the door is in closed position, means connecting said lock bolt with said front bell crank, an operator-controlled connecting rod connected with all three of said bell cranks for coincident control thereof, and a lock bolt release stop arranged to receive motion from said door as the latter moves to closed position, and to thereby take a position to limit motion of said connecting rod.

V l. In apparatus of the class described for controlling a sliding jail door carried by a hanger, a pair of bell cranks, a latch bolt bar having connection therewith, one end with each bell crank, a front bell crank, a lock bolt pivotally mounted to engage said hanger when the door is in closed position, said lock bolt having positive connection with said front bell crank, an operator-controlled connecting rod connected with all three of said bell cranks for coincident control thereof, and a lock bolt release stop arranged to be positioned by said door as the latter moves to closed position, to limit possible motion of said connecting rod.

5. In apparatus of the class described for controlling a sliding jail door carried by a hanger, a pair of bell cranks, a latch bolt bar having connection therewith, one end with each bell crank, a front bell crank, a lock bolt pivotally mounted to engage said hanger when the door is in closed posit-ion, said lock bolt having connection with said front bell crank, an operator-controlled connecting rod connected with all three of said bell cranks for coincident control thereof, a lock bolt stop movably mounted and means yieldably urging the same to a position preventing locking movement of said lock bolt, and a tripper pin movable with said door to disengage said lock bolt stop from said lock bolt when the door is closed, whereby said connecting rod cannot be moved to locked position unless the door is closed.

6. In apparatus of the class described for controlling a sliding jail door carried by a hanger, a pair of bell cranks, a latch bolt bar having connection therewith, one with each bell crank, a vertical lock bolt for said door having connection with one of said bell cranks, a front bell crank, a front lock bolt pivotally mounted to engage said hanger when the door is in closed position, means connecting said front lock bolt with said front bell crank, an operator-controlled conneeting rod connected with all three of said bell cranks for coincident control thereof, and a lock bolt release stop arranged to receive motion from said door as the latter moves to closed position and to thereby limit adjustment of said lock bolts.

7. In apparatus of the class described for controlling a sliding jail door, a bell crank connecting rod shiftable in the direction of door movement to control door locking mechanism, a control lever, said control lever being removed from said bell crank connecting rod and movable in a different direction and a different plane therefrom, and means associating said connecting rod with said lever and including a pair of bell cranks and interconnecting rods whereby positive connection is had for both directions of movement and the lever will therefore positively indicate the position of the connecting rod.

8. In apparatus of the class described and having a control lever movable between three positions for respectively locking, unlocking and locking open a jail door, a pivoted hook member having an arm with hook projections engageable with said control lever to main tain the latter in unlocked or locked open positions, said hook member having a po tion arranged to overbalance said arm portion toward control lever engaging position.

9. In apparatus of the class described and having a control lever movable vertically be tween three positions for respectively look ing, unlocking and locking open a jail door, a hook member in the form of a bell crank, and having a vertically extending arm with hook projections engageable with said control lever to maintain the latter in unlocked or locked open positions and having a horizontally extending portion arranged to overbalance said vertical arm toward control lever engaging position.

10. In apparatus of the class described and having a control lever movable between three positions for respectively locking, unlocking and locking open a jail door, a pivoted hook member having an arm with hook projections engageable with said control lever to maintain the latter in unlocked or locked open positions, said hook member having a portion arranged to overbalance said arm portion toward control lever engaging position, said portion having an opening, and stop means arranged in said opening to limit the movement of said hook member in both directions.

11. In apparatus of the class described and having a control lever movable between three positions for respectively locking, unlocking and locking open a jail door, a pivoted hook member having an arm with hook projections engageable with said control lever to main tain the latter in unlocked or locked open positions, said hook member having a portion arranged to overbalance said arm portion toward control lever engaging position,

said portion havin'ga pair of openings, fixed stop means in one of said openings for limiting the swing of said hook member, and operator-controlled stop means in the other opening, adjustable to. secure said hook member in control lever eng 'ing position.

a 12. In apparatus of the class described and having a control lever movable between three positions for respectively locking, unlocking and locking open a: jail door, a pivoted hook member having an arm with hook projections engageable with said control lever to maintain the latter in unlocked or locked open positions, said hook member having a portion arranged to overbalance said arm portion toward control lever engaging position, said portion having a pair of openings, fixed stop means in one of said openings for limiting the swing of said hook member, and operator controlled stop means in the other opening,

adjustable to secure said hook member 111 control lever engaging position, the locations of said openings with respect to the pivot of the hook member being such that said openings will have motion in different directions.

13. In apparatus of the class described and having a plurality of control levers movable between three positions for respectively looking, unlocking and locking open corresponding jail doors, for each control lever a pivoted hook member having an arm with hook projections engageable with its control lever tomaintain the latter in unlocked or locked open positions, each hook member having a portion arranged to overbalance its arm portion toward control lever engaging position, said portion having an opening, stop means adjustable in said opening to secure said hook member in control lever engaging position,

and operator controlled means intcrassociating all of said stop means for simultaneous releasing adjustment thereof.

ll. In apparatus of the class described and having a plurality of control levers movable vertically between three positions for respectively locking, unlocking and locking open corresponding jail doors, for each control lever a hook member in the form of a bell crank, and having a vertically extending arm with hook projections engageable with its control lever to maintain the latter in unlocked or locked open positions, and having a horizontally extending portion arranged to overbalance said vertical arm toward control lever engaging position, said portion having an opening, stop means adjustable in said opening to secure said hook member in control lever engaging position, and operator controlled means interassociating all of said stop means for simultaneous releasing thereof.

15. In apparatus of the class described and having a plurality of control levers arranged for independent parallel motion upon acommon axis between three positions for respectively locking, unlocking, and locking open, clorrespondirw jail doors, a master release bar arranged to engage all of said levers, and operator-operated means for moving said master release bar to move said levers simultaneously, said partsbeing arranged within a box having. a cover ano said operator-operated means including a master release lever, said lever being arranged to extend beyond the box confines when the master control bar L lli:

is in unlocked position, and to be within said confines when the mast-er control bar is in locked josition, whereby said cover cannot be closed upon said box unless the master control bar is in locked position.

16. In apparatus of the class described for controlling a sliding jail door and including a gap nut and cooperative latch bolt, a latch bolt bar, and supporting means therefor providing operator-controlled tilting thereof to coincidently raise one end and lower the other.

17. In apparatus of the class described for controlling a sliding jail door and including a gap nut and cooperative latch bolt, a latch bolt bar, stop means at the ends of said bar for supporting the same, and operator-controlled means for selectively raising either end of said bar from its stop means.

18. In apparatus of the class described for controlling a sliding ail door, a pair of bell cranks, an operator controlled connecting rod arranged for coincident control of said bell cranks, a latch bolt bar and means supporting said latch bolt bar on said bell cranks, one end upon each, said bell cranks being so disposed that the bar ends will have simultaneous motion in opposite directions, stop means limiting the lowering movement of said latch bolt bar, said supporting means including lost motion connections, whereby either bell crank may be moved in latch bolt lowering direction farther than its end of the latch bolt bar may be lowered.

19. In apparatus of the class described for controlling a sliding jail door, a gap nut mounted for operator-controlled movement along the path of said door, a latch bolt engageable with said gap nut, means associating said latch bolt with said door to move with the latter, a latch bolt bar supporting said latch bolt to control its engagement with said gap nut, and means for supporting said latch bolt bar for tilting adjustment and comprising a pair of hell cranks, each having an arm associated with an end of said latch bolt bar, an operator-controlled rod in terconnecting the other arms of said bell cranks for coincidental movement of said bell cranks, the bell cranks being so arranged that the ends of the latch bolt bar will have simultaneous vertical movement in opposite directions.

20. In apparatus of the class described for controlling a sliding jail door, a lock bolt located to lie adjacent one vertical edge of the door when the latter is fully open and adjacent the other vertical door edge when the door is fully closed, said bolt being mounted for vertical adjustment by the operator, said lock bolt and said door having cooperative parts, including a notched lock bolt part and a pair of notched door parts, arranged to clear each other in any door position when the lock bolt is in one position, so that the door may be free for opening and closing movement, said lock bolt being arranged to interlock with the corresponding one of said door parts when the door is fully opened or fully closed, by adjustment of said lock bolt vertical edge of the vdoor when the latter is fully open and adjacent the other vertical door edge when the door is fully closed, said bolt being mounted for vertical adjustment by the operator between three positions, said lock bolt and said door having cooperative parts including on the bolt a notched part adjacent the top of the door and a part adjacent the bottom of the door, and including on the door a pair of notched parts adjacent the upper door edge and each adjacent one vertical door edge, and a third part at that lower corner of the door which is adjacent the lower of said lock bolt parts when the door is closed, said cooperative parts being so arranged that when the lock bolt is in its intermediate position the door will be free for openingand closing movement, when the door is fully open the lock bolt may be raised to interlock its upper cooperative part with the near up per cooperative part of the door, and when the door is fully closed the lock bolt may be lowered to interlock its upper cooperative part with the near upper cooperative part of the door, and to also interlock its lower cooperative part with the lower cooperative door part.

22. In apparatus of the class described for controlling a sliding jail door, a gap nut mounted for operator-controlled movement along the path of said door, a latch bolt engageable with said gap nut, means associating said latch bolt with said door to move with the latter, a latch bolt bar supporting said latch bolt to control its engagement with said gap nut, operator-operated means for adjustably supportin said latch bolt bar for COIltlOllillg said engagement and including a bell crank, and a lock bolt located to lie adj acent one vertical edge of the door when the latter is fully open and adjacent the other vertical door edge when the door is fully closed, said lock bolt having connection with an arm of said bell crank for vertical adj 11stment by the operator coincidental with adjustment of said latch bolt bar, said lock bolt and said door having cooperative parts, including a notched lock bolt part and a pair of notched door parts, arranged to clear each other in any door position when the lock bolt is in one position, so that the door may be free for opening and closing movement, said lock bolt being arranged to interlock with the corresponding one of said door parts when the door is fully opened or fully closed, by adjust-merit vof seid lock bolt .to=nnotl1er position.

.23. In apparatus oft'he'classdescribedffor controlling a sliding jail dOOI,'EL-l00kb0ltf0l' vsaid door, mounted to move'in opposite di- -1ect10nsfrom an intermediate nnloc-kedzposb tion to locked closed andlockedopen positions, and a movably mounted lockibolt re lease stoplocatedto receive motion from said door'asthe latter moves to closed position,

and. associated with said look :bolt to 1 block 'the samewhenthe door is closedt-oprevent adj ustn'zent of 1 said a look :bolt -to 'looked open position.

In testimonywhereof l hereby affix my Sig HARRY D. GARBER.

"nature.

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