Abstract: A file cabinet (10) including slidably mounted drawers (18) is provided with an interlock mechanism which prevents the simultaneous opening of two drawers. The interlock mechanism includes an elongate channel (24) having a fixed length and depth. Slidable within the channel (24) along the length thereof are blocks (42) and wedges (44). The blocks (44) include at least one end surface (48) which is at an acute angle relative to the bottom wall (28) of the channel (24). The wedge members (44) are displaceable relatively into and out of the depth of the channel. The wedge members have surfaces (52) complementary to and in sliding contact with the end surfaces (48) of the blocks. The length of the channel (28) is less than that of the combined length of all of the block (42) and wedge members (44) disposed therein and at least as long as the combined length of the block and one of the wedge members.

Abstract: An articulated linkage locks the various access panels, covers, and plates opening into an engine and its accessories. A spring loaded shaft is used to drive a bell crank and a set of catch bolts. Each catch bolt is matched with a catch plate joined to one of the panels, covers and plates granting access to the engine and its components. A pair of doors covering the instrument panel is used to reposition the spring loaded shaft and bell crank. Locking the doors together therefore locks the catch bolt and catch plates together in one stroke and with one lock.

Abstract: Initial opening movement of a drawer in a cabinet by cam action raises a locking bar to lock the other drawers closed. In so doing the locking bar rotates a pinion having an arm which stresses a spring carrying it past an over-center position to maintain the bar in locking position while the moving drawer travels to the fully open position. The end of the closure of this drawer by cam action returns the bar, arm and spring to their initial state. A key-lock mechanism can raise the bar to lock all the drawers shut. If the cabinet is tilted forward substantially, gravity causes a ball to run to a position to hold the pinion against rotation thereby preventing all the drawers from automatically becoming locked due to the bar running to the locking position under gravity or inertia.

Abstract: A merchandise cabinet having display and drawer bearing areas is equipped with a drawer locking apparatus comprising drawer mounted abutment means, a rigid locking frame slidably mounted for lateral movement into and out of engagement with the abutment means, and an engagement lever carried on the locking frame and extending into the path of an access door provided in the display area.

Abstract: A door and shelf interlock system for a vending machine comprises a vertically movable locking bar operatively coupled to the pivot structure of the door of the vending machine. The locking bar in a first position prevents any of the shelves from being pulled out from their normally retracted position inside the machine. A locking member is associated with each shelf. If the shelf is pulled out from its normally retracted position, the locking member engages the locking bar to prevent the door from being closed until the shelf is placed back into its retracted position.

Abstract: A mechanism comprising two interlockable pivoting members is installed between two adjacent sliding compartments in such a way that withdrawal of one compartment causes the associated member to pivot and interlock with the other member, thereby securing the latter in a position in which a catch blocks the other compartment and prevents it from being withdrawn simultaneously.

Abstract: A gang lock assembly for locking the drawers of a cabinet includes a vertically extending locking bar behind each vertical row of drawers and a latch on each drawer engageable with the locking bar for locking the drawer. Each locking bar is pivotable about a vertical axis, and a connecting bar connects the locking bars for simultaneous pivoting movement between locking and unlocking positions. An actuator operable by one of the drawers is engageable with the locking bar behind said one drawer for pivoting the locking drawer to its locked position as the drawer is closed.