Abstract: Design improvements and production jig tools make robust slatted three platform Futon Bed that converts from Bed (2) to Chair (1) or couch. Drill jigs locate holes in each panel. Other jigs form the platform matrixes. Jigs cooperate and assure production with a DRILL GUIDE. The platforms are glued. Improved glue prevents side force from deforming platforms. Design and jigs support fabrication in developing nations. Bed (2) disassembles into four smaller transportable components (3,4,5,6) by the removal of pins. Upper_Foot (13), Upper_Side (12) and Bottom (14) form a storage compartment and reinforce Upper_Pedestal (5) structure. Latch (17) cooperates with Upper_Foot (13) to latch the Chair (1) configuration and prohibit the Chair (1) from decomposing. Additionally, Latch_Catch (36) in Upper_Foot (13) serves as a clearance slot for hinges in the Bed (2) configuration. Platforms are fully symmetrical. In the event of damage to a hinge location, platform hinge reversal restores the convertible bed.

Abstract: An auto-loading firearm has a firing mechanism that selectively permits (1) conventional semi-automatic operation or (2) automatic operation that permits bursts to be fired at a rate which can be varied between 1 and about 12 rounds per second in response to the finger pressure on the trigger, without release of the trigger or adjustment to the firearm. The mechanism for accomplishing variable rate of fire includes a cam surface on the bolt carrier which causes the trigger to move forward at one point in the firing cycle, an automatic trigger disengager device pivotally mounted on the frame for coopertion with the trigger, and a trigger depressor device, the mechanism being brought into an operating mode by a manually operated selector lever which has a variable fire position and a safety position. In the event that the variable rate mechanism becomes inoperative, as by breakage of a part the firearm will be fail safe and will operate in the semi-automatic mode.