Abstract: A security drawer may be provided with an upwardly opening door. The upward opening of the door may be prevented when the drawer is not in use by the locking in position of a cover plate between a lock bar and the upper edge of the drawer door. As a result, any attempt to break into the security drawer may be thwarted and the door is forcefully locked against intruders.

Abstract: In accordance with one embodiment of the present invention, a sliding, bi-parting, service window may be operated by pressing on a push operator. In response to such push operation, a pair of bi-parting windows may be caused to slide apart sufficiently to provide a service opening. In some embodiments the windows may automatically close when pressure is released, for example, in response to the action of a weight that moves to a position of higher potential energy in response to opening of the windows.

Abstract: In accordance with one embodiment of the present invention, a sliding, bi-parting, service window may be operated by pressing on a push operator. In response to such push operation, a pair of bi-parting windows may be caused to slide apart sufficiently to provide a service opening. In some embodiments the windows may automatically close when pressure is released, for example, in response to the action of a weight that moves to a position of higher potential energy in response to opening of the windows.

Abstract: A sliding service window assembly may be provided with a weight that automatically closes a window. The weight may be attached through a wire to a bracket on the top of the window so that whenever the window is released, it automatically closes. Through the use of a weight, the window closes regardless of the misorientation of the window within a building. There is no need for adjustments between the window and the frame since the inclination of the assembly is not important. In addition, because the window moves in a horizontal direction parallel to the frame, there is no misalignment between the window and the frame in the closed position which could result in air exchange.