Lock for sliding closures

In a sliding closure assembly including an upper track and a sliding closure having an upper portion slidably movable in said upper track, a device for preventing unauthorized movement of said closure from a closed position to an open position, said track being exposed to the exterior side when the closure is in its closed position, said device comprising,

• a projection affixed to the interior side of the closure,
• a stop member located on the interior side of the closure, said stop member being elongated in a direction parallel to the track,
• pivot means supporting said stop member for pivotal movement about a stationary horizontal axis,
• a projection-abutting portion on said stop member located between the projection and said pivot means, said projection-abutting portion being movable vertically by said pivotal movement between an upper retracted position removed from the path of the projection to a lower projection-abutting position located in the path of the same projection to prevent movement thereby of the projection and the closure affixed thereto.

In a sliding closure assembly including an upper track and a sliding closure having an upper portion slidably movable in said upper track, a device for preventing unauthorized movement of said closure from a closed position to an open position, said device comprising,

• a stop member located within the upper track,
• said stop member being elongated in a direction parallel to the track,
• pivot means supporting said stop member for pivotal movement about a horizontal axis,
• a closure-abutting portion on said stop member located between the closure and said pivot means, said closure-abutting portion being movable vertically by said pivotal movement between an upper retracted position removed from the path of the closure to a lower closure-abutting position located in the path of the closure to prevent movement thereby of the closure,
• a tail portion on said stop member, said pivot means being located between the tail portion and the closure, means for limiting to an uppermost position the upward movement of said tail portion thereby limiting the downward movement of the closure-abutting portion to establish its closure-abutting position, and
• a stationary shoulder means positioned adjacent to said tail portion when in its uppermost position to prevent movement of the stop member in a direction toward said tail portion.

A device for preventing unauthorized movement of a door or other building closure which is movable in a horizontal linear path within a track from a closed position to an open position, said device comprising,

• a horizontally elongated stop member,
• support means including pivot means supporting said stop member for manual pivotal movement about a transverse horizontal axis,
• said stop member having a closure-abutting portion spaced in a first direction from said pivot means, said closure-abutting portion being movable vertically by said manual pivotal movement between an upper retracted position and a lower closure-abutting position,
• means for holding said stop member in its upper retracted position when it is moved thereto manually,
• a tail portion on said stop member spaced from said pivot means in a second direction which is opposite to said first direction, means for limiting to an uppermost position the upward movement of said tail portion thereby limiting the downward movement of the closure-abutting portion to establish its closure-abutting position, and
• a stationary shoulder means positioned adjacent to said tail portion when in its uppermost position to prevent movement of said stop member in a direction toward said tail portion.