Vandal-resistant frames for advertising, photographic or like material

Abstract

A vandal-resistant frame has a rear member securable to a relatively vertical supporting surface and a front member hinged to the rear member for movement between open and closed positions. The front member has an aperture through which advertising, photographic or like material within the frame can be seen from an external position. The front member is secured to the rear member in a closed position by at least one projection on one member engaged in a recess in the other member adjacent to the aperture in the front member, whereby the projection or projections can be detached from the recess or recesses to open the frame by an appropriately shaped key member inserted between the front and rear members from a position within the aperture.

1 . A vandal-resistant frame having a rear member securable to a relatively vertical supporting surface and a front member hinged to the rear member for movement between open and closed positions, the front member having an aperture through which advertising, photographic or like material within the frame can be seen from an external position, the front member being secured to the rear member in a closed position by at least one projection on one member engaged in a recess in the other member adjacent to the aperture in the front member, whereby the projection or projections can be detached from the recess or recesses to open the frame by an appropriately shaped key member inserted between the front and rear members from a position within the aperture.  
   
   
       2 . A vandal-resistant frame according to  claim 1  wherein said one member has a plurality of unevenly spaced projections and the other member has a plurality of correspondingly unevenly spaced recesses in which the projections are engageable.  
   
   
       3 . A vandal-resistant frame according to  claim 2  wherein said one member has grooves extending from the aperture on opposite sides of each projection.  
   
   
       4 . A vandal-resistant frame and key member, said frame having a rear member securable to a relatively vertical supporting surface and a front member hinged to the rear member for movement between open and closed positions, the front member having an aperture through which advertising, photographic or like material within the frame can be seen from an external position, the front member being secured to the rear member in a closed position by at least one projection on one member engaged in a recess in the other member adjacent to the aperture in the front member, and an appropriately shaped key member insertable between the front and rear members from a position within the aperture to detach the projection or projections from the recess or recesses to open the frame.  
   
   
       5 . A vandal-resistant frame and key member wherein said one member has a plurality of unevenly spaced projections and the other member has a plurality of corresponding unevenly spaced recesses in which the projections are engageable, said one member having grooves extending from the aperture on opposite sides of each projection, and the key member having laterally spaced fingers slideable into the grooves and thereby operable to push one frame member away from the other frame member and remove the projections from the recesses, thereby opening the frame.