Abstract: An improved multifuel heater having a means to provide a source of particte free combustion air to a fuel ignition chamber.

Abstract: An improved tow bar assembly and attaching system for use of heavy vehicles eighing in excess of 50 tons. The invention reduces shock to the two bar assembly though a hook and loop attaching means between the tow bar and the towed vehicle. Reinforcing composite windings about the midpoint of the tow bar reduce the overall weight of the tow bar while increasing strength and rigidity in critical areas.

Abstract: A tracing head is disclosed which will allow a programmable router to trace he programmed path of the router on an inexpensive media to check the programming. This avoids the time and material wastage resulting from cutting metal plated circuit boards without being able to check the programming path.

Abstract: An improved extension for use with tools is disclosed. The extension has a pair of gears located on a frame. The gears have a chain drive therebetween to allow the force applied to one gear to be applied to the other gear. The structure allows a drive member such as a socket to be offset from the drive handle.

Abstract: A proportioning valve for hydraulic systems having a pair of hydraulic motors. The valve has forward and reverse positions and will also provide differential flow to the paired motors when a difference in drive speed is necessary.

Abstract: A drain plug is disclosed for use with hollow structures which prevents the nsertion of an external probe into the structure internal cavity.

Abstract: A distance measuring device includes first and second wheels having an endless belt looped about the wheels so the belt rotates as a ground engaging wheel. A hand contacting member is attached to the belt so as to provide positive sensory input to the device user when measuring distances.

Abstract: An improved reactive armor is disclosed. The armor has means which impinge n a penetrating threat to destroy its integrity and prevent incursion to the interior of an armored vehicle.

Abstract: An improved pressure relief valve is disclosed which provides a simple inexpensive structure to exhaust a pressure filled bag, such as an airbag, in a controlled manner when the pressure in the bag exceeds a predetermined level.

Abstract: The present disclosure relates to an armored vehicle having a chassis for comotion and an aromored turret mounted on the chassis. The turret has a lower limit travel stop associated with the shroud surrounding the main gun of the turret to prevent the turret from moving to a position to where the gun tube is endangered of being brought into contact with the ground or various low growing shrubs or trees.

Abstract: The invention is a universal joint for transferring rotary motion between o shafts whose axes are movable relative to one another. The universal joint includes a generally Y-shaped terminus on either shaft, and a pair of arms on each terminus diverging obliquely away from the axes of the respective shafts. A frame member connected between the termini has a plurality of rods radiating therefrom to engage the arms of the termini. A bearing swivellingly mounted in each arm of the termini defines a through bore for accommodating translational movement of the rods through the bearings.

Abstract: An improved fire suppression system control. The control system has circuy which reacts to a break in the circuit caused by catastrophic events in a rapid fashion.

Abstract: An antibacklash beveled gear drive is disclosed. The drive is constructed adjust for intial misalignment and subsequent wear. One of the gears is journaled on a driven shaft and has a biasing means which bump the gears into engagement.

Abstract: A high efficiency evaporator is disclosed. The evaporator is made with a ous wick on the interior of the evaporator housing to facilitate movement of a refrigerant liquid within the housing. This aids in dispersing the refrigerant.

Abstract: A check valve with a shaped outlet port and interior fluid passage provides a valve with improved fluid flow characteristics.

Abstract: A two part, over center buckle for belting. The buckle has a retention member on one part of the buckle which will engage a detent on the second part of the buckle when the buckle is closed. The retention member holds the buckle closed against normal vibration and jarring.

Abstract: An apparatus for measuring insecticide activity. A chamber holds a plural of insects and a quantity of the insecticide to be tested. An exit is formed in the chamber so that insects escaping from the chamber pass through a detector to generate a signal. The signals are compared to other signals generated by the other insects passing the detector to determine the repellency of the insecticides.

Abstract: A load transport structure is disclosed, which distributes tire loads over larger area. The structure has a ramp member which pivots so as to allow easy loading of a vehicle and pivots to a horizontal position to hold the load stable during transport.

Abstract: In association with a vehicle designed to carry a heavy load module, an ioved means for accurately guiding the module onto the vehicle bed surface as the module is being lowered into position. The improved guide comprises a plural number of specially formed nuts carried on the studs that are used to fasten the module to the bed surface. Each specially formed nut has a conical external surface that acts to center the module fastener holes relative to the axis of each associated stud. The improved guide provides a low cost mechanism for facilitating the quick alignment of a heavy cumbersome load module during the process of lowering the module onto a vehicle bed surface.