Abutment swivel doorstop

Abstract

A swivel bar is mounted on a door jamb to swing between a position in the path of the door to block its opening and a position retracted out of the path of door-opening movement. The stop bar can be held in door-blocking position by engagement of a rib-and-groove latch. The stop bar can be moved into latch-engaged position by swinging of a keeper to move cooperating cylindrical or edgewise cams relatively which movement shifts the stop bar into latched position in opposition to the force of a latch-releasing spring. .Iadd.

I claim: 
     
       1. In abutment stop mechanism for blocking opening movement of a closure .Iadd.swingable about an upright axis .Iaddend.including a stop member and a mount separate from the closure, mounted adjacent to .Iadd.the closure in closed position and .Iaddend..[.but.]. independently of the closure .[.in closed position.]. and supporting the stop member for turning about a stop member turning axis between a closure-blocking position .Iadd.of the stop member obstructing .Iaddend..[.and a closure-clearing position, in which closure-blocking position the stop member obstructs.]. a predetermined opening-movement path of a stop-engageable portion of the closure and .Iadd.a closure-clearing position of the stop member out of the opening-movement path of the closure, in which closure-blocking position of the stop member .Iaddend.a closure-engageable portion of the stop member .Iadd.located a substantial distance from such stop member turning axis .Iaddend.is engageable by such stop-engageable portion of the closure to limit .Iadd.its .Iaddend.movement .[.of such stop-engageable portion.]. along such predetermined opening-movement path, .[.and in which closure-clearing position the stop member is out of the opening-movement path of the stop-engageable portion of the closure, the closure-engageable portion of the stop member being located a substantial distance from the stop member turning axis,.]. the improvement comprising the mount .[.being mounted with.]. .Iadd.mounting .Iaddend.the stop member .Iadd.for .Iaddend.turning .Iadd.about an upright stop member turning .Iaddend.axis substantially perpendicular to and offset slightly from such predetermined opening-movement path of the stop-engageable portion of the closure and located so that a line joining such stop member turning axis and the closure-engageable portion of the stop member in closure-blocking position is at an angle .Iadd.of less than 45°.Iaddend. to such predetermined opening-movement path of the stop-engageable portion of the closure.Iadd., whereby .Iaddend..[.of less than 45° so that.]. pressure of the stop-engageable portion of the closure on the stop member will exert on the stop member a compressive force toward the stop member turning axis greater than the stop member swinging force acting perpendicular to a line joining the stop member turning axis and the stop-engageable portion of the closure when the closure is in its position closest to the stop member turning axis.Iadd., and latch means engageable between the mount and the stop member for preventing swinging of the stop member out of closure-blocking position relative to the mount.Iaddend.. 
     
     
       2. The stop mechanism defined in claim 1, .[.and.]. .Iadd.the .Iaddend.latch means for .[.securing.]. .Iadd.preventing swinging of .Iaddend.the stop member .[.in.]. .Iadd.out of .Iaddend.its closure-blocking position .Iadd.including .Iaddend.a latch groove in the stop member and a latch projection carried by the mount and located for engagement in said groove when the stop member is in closure-blocking position. 
     
     
       3. In abutment stop mechanism for blocking opening movement of a closure including a stop member and a mount separate from the closure, mounted adjacent to but independently of the closure in closed position and supporting the stop member for turning about a stop member turning axis between a closure-blocking position and a closure-clearing position, in which closure-blocking position the stop member obstructs a predetermined opening-movement path of a stop-engageable portion of the closure and a closure-engageable portion of the stop member is engageable by such stop-engageable portion of the closure to limit movement of such stop-engageable portion along such predetermined opening-movement path, and in which closure-clearing position the stop member is out of the opening-movement path of the stop-engageable portion of the closure, the improvement comprising latch means interengageable between the stop member and the mount for securing the stop member in its closure-blocking position and including a latch groove and a latch projection located for locking interengagement when the stop member is in closure-blocking position, and cam means turnable relative to the mount and the stop member for effecting movement of the stop member axially relative to the mount to engage said latch projection in said latch groove. 
     
     
       4. In abutment stop mechanism for blocking opening movement of a closure including a stop member and a mount separate from the closure, mounted adjacent to but independently of the closure in closed position and supporting the stop member for turning about a stop member turning axis between a closure-blocking position and a closure-clearing position, in which closure-blocking position the stop member obstructs a predetermined opening-movement path of a stop-engageable portion of the closure and a closure-engageable portion of the stop member is engageable by such stop-engageable portion of the closure to limit movement of such stop-engageable portion along such predetermined opening-movement path, and in which closure-clearing position the stop member is out of the opening-movement path of the stop-engageable portion of the closure, the improvement comprising latch means interengageable between the stop member and the mount for securing the stop member in its closure-blocking position and including a latch groove and a latch projection located for locking interengagement when the stop member is in closure-blocking position, and spring means urging the stop member to move relative to the mount in the direction to disengage said latch groove and said latch projection. 
     
     
       5. The stop mechanism defined in claim 4, in which the spring means includes a helical compression spring engaged between the mount and the stop member and arranged concentrically with the stop member turning axis. 
     
     
       6. The stop mechanism defined in claim 4, and cam means turnable relative to the mount and the stop member for effecting movement of the stop member axially relative to the mount in opposition to the force of the spring means to engage the latch projection in the latch groove. 
     
     
       7. The stop mechanism defined in claim 1, in which the closure is mounted in a frame, and the mount is mounted on the closure frame so that the stop member turning axis is located farther from the face of the frame than it is to the closure when the closure is in its position closest to the stop member turning axis. 
     
     
       8. The stop mechanism defined in claim 2, and cam means turnable relative to the mount and the stop member for effecting movement of the stop member axially relative to the mount to engage the latch projection in the latch groove. 
     
     
       9. The stop mechanism defined in claim 8, in which the cam means include coacting edgewise cams relatively rotatable about the stop member turning axis. 
     
     
       10. The stop mechanism defined in claim 9, in which at least one of the edgewise cams is crowned and the cams are relatively turnable in one direction to move the crown beyond a predetermined position to deter relative turning of the cams in the opposite direction. 
     
     
       11. The stop mechanism defined in claim 2, and spring means urging the stop member to move relative to the mount in the direction to disengage the latch groove and the latch projection. 
     
     
       12. The stop mechanism defined in claim 11, in which the spring means includes a helical compression spring engaged between the mount and the stop member and arranged concentrically with the stop member turning axis. 
     
     
       13. The stop mechanism defined in claim 2, and shackle means for holding the stop member in position with the latch groove and latch projection engaged. 
     
     
       14. The stop mechanism defined in claim 1, in which the mount includes a lock strike.