Lockable enclosure having a tamper-proof locking assembly

An improved enclosure assembly of the type that includes an openable enclosure, a locking member movable relative to the enclosure for selectively locking or unlocking it, a latch assembly mounted on the enclosure for retaining the locking member in its locked position, and a manually operable lock for selectively locking the latch mechanism so as to secure the locking member in its locked position, characterized by:

• the enclosure having a fixed wall, and a horizontally swingable door having an edge which engages the fixed wall for closing the enclosure, said fixed wall having an inwardly turned flange thereon;
• said locking member including a vertical locking bar having a main section thereof rotatably mounted on the inner side of said door adjacent said edge thereof, said locking bar main section carrying at least one locking tab adapted to lockingly engage said flange when said locking bar is rotated;
• said door having an opening therein adjacent an upper end of said locking bar;
• said locking bar at the upper end of its main section being bent at a right angle to form a short pivot arm as a horizontal section which extends through said opening in said door, and being further bent at aright angle in the same horizontal plane to form a lever arm which is perpendicular both to said main section and to said pivot arm, said lever arm being disposed on the outer side of said door and swingable towards or away from said door for rotating said locking bar main section;
• said latch assembly fixedly secured to the outer side of said door and including a plate section extending perpendicularly outwardly from said door, said plate section having an outwardly opening horizontal slot which, in the locked condition of the enclosure assembly, receives said lever arm of said locking bar;
• said latch assembly further including a latch plate vertically disposed in parallel relation to said plate section, said latch plate having an upper end pivotally secured to the upper end of said plate section and being adapted to retain said lever arm of said locking bar in said slot, the lower ends of said plate section and said latch plate having holes which are normally aligned;
• and
• a guard housing fixedly secured to the external surface of said door and surrounding said latch assembly and the accessible portion of said locking bar, said guard housing at its lowermost end having a single opening which is large enough for the insertion of a human hand therein when it is desired to actuate said lever arm or to use a padlock for locking said aligned holes, but which is too small for insertion of a cutting instrument that could cut apart either said locking bar, said latch assembly, or the padlock.