Abstract: A roof jack is provided for mounting an air conditioner of the evaporative type on a pitched roof of a structure wherein is provided an upper frame member adapted for hinged connection with a lower frame member and said lower frame being adapted to serve as a plenum for connection to supply ducts and to contain a removable damper for preventing escape of air from the structure through the supply ducts and said upper and lower members and said upper and lower frame members being adapted for levelling by the use of prefabricated extension panels for the sides of said upper panel through which fixing screws may be inserted and fasten the sides of the upper member to the lower member.

Abstract: A trouble lamp is constructed to provide a sliding movement between a light bulb and a reflector shield with slip friction fit between parts such that they may be manually positioned to provide the quality and amount of light desired by the operator.

Abstract: Apparatus for maintaining a radiation sensitive portion thereof in alignment with a distant source of radiation during relative movement between the situs of the apparatus and the source, wherein movement from alignment causes a differential in energy output in spaced apart elements of the radiation sensitive portion which is transformed into mechanical energy to return the portion to alignment.

Abstract: A missile seeker optical system which provides off-boresight viewing angles p to 135.degree. by the addition of two spherical-toric corrector lenses which cooperate with a conventional achromatic lens used as the seeker objective.

Abstract: A braking system for controlling the rotational motion of one or more rotatable members such as vehicle wheels wherein an annular base member is stationarily mounted with respect to a concentric rotatable axle and a cup shaped drum is concentrically mounted on the axle for rotation therewith and enclosing the brake mechanism. A plurality of slots are formed on a portion of the base member and on the inner edge of the drum. A centrally positioned, split, annular, metallic disc has peripheral fingers directed radially outward to engage the slots on the drum and annular friction members are positioned on either side of this central disc. Each of the friction members has radially inwardly directed fingers for engagement with the slots on the base. The friction members, therefore, are held relatively stationary and the central disc rotates with the axle.

Abstract: A vehicle is supended on a pair of slotted rails of tubular shape. The vehicle has a plurality of support members sloping downwardly from the sides of the car and having running gear thereon engaging within the rails through the slots. The vehicle is preferably of light weight materials and provided with some form of aerodynamic means to provide lift as the vehicle passes through the air along a right of way. The running gear includes rolling friction means designed to function in any event from low speed with maximum weight to negative gravity at high speeds.

Abstract: A liquid propellant gun featuring concentric propellant pump, valve and b. Forward movement of the bolt causes forward movement of the propellant pump by interconnection of ball detents. The valve is forced open by differential pressure and closed by abutment of pump surfaces. At this juncture the ball detent connection is relieved and the bolt continues forward to pressurize the propellant charge before firing.

Abstract: The forward bulkhead of a warhead casing centrally formed with a cylindri indention which causes a forward jet when the warhead is detonated.

Abstract: Thermocouples are fabricated by painting lines of two dissimilar thermal-ment materials on a non-conducting substrate such that the painted lines intersect at the location where temperature is to be measured. Alternatively the paint may be thinned to the consistancy of ink and used in a printing process. Thermocouples may be thus formed on paper, cloth or plastic surfaces, for example.

Abstract: An explosive device comprising a plurality of serially spaced shaped char with a flat metal washer at the base of each upper charge which washer is propelled across an annular space, at a known velocity, to impact and thereby initiate the explosive charge driving the next jet in sequence. A metal shield down the center of the charge provides a channel for passage of the jets generated and also, said shield by collapsing under the action of the explosive, propels a particular washer associated therewith and clips off the slow non-penetrating end of each jet, minimizing the required time delay between jets.

Abstract: An existing booster and fuze combination is modified to provide relief from emperature and pressure buildup in an open fire environment. The booster explosive, thus, is encased in a low temperature melting plastic and the main housing is vented by boring a number of passages through the major thread diameter shoulder of the fuze case.

Abstract: A warhead casing is designed to protect the high explosive material therein from open fires or other sources of intense heat which might cause premature explosion of the warhead. The warhead casing is relieved throughout the greater part of its outer circumference and may be then counter-relieved over a slightly lesser distance. The relieved area is filled with an ablative material covered by a protective intumescent coating, for example, of fire resistant, impregnated cloth.

Abstract: An injection system for a liquid propellant gun including coaxial flow vas giving complete mixing of two propellant components by convergent streams, wherein ullage is eliminated by closely contouring the valves with the gun chamber and the flow valves are automatically controlled by action of the propellant pump.

Abstract: An amphibious vehicle is provided with pivoted plates on either side for ement between an extended position approximately horizontal and a "folded" position approximately vertical with respect to the normal position of the vehicle. A third plate may also be attached beneath and parallel to the bottom of the vehicle. These plates are so shaped that in the extended position they serve as planing skis and are fabricated from a material which will afford armor protection to the vehicle when the plates are in the folded or retracted position.

Abstract: A stratified charge internal combustion engine combines a regular intake valve, a rich intake valve, a pre-combustion chamber and the sparkplug into a single coaxial unit. The coaxial configuration provides ideal flow symmetry, insures quick complete ignition of the combustion and main chambers and permits optimized control of exhaust emissions without lowering engine efficiency.

Abstract: An air intake pressure unit is attached to the exhaust section of a jet ene. The unit comprises several passages which extend out beyond the end of the jet engine and through which passages engine exhaust and cooling air is passed so that cooling air passes over and mingles with exhaust gases from the engine. Construction is such that the lower static pressure formed by the exhaust gases assists in drawing in the cooling air.

Abstract: A gas laser is constructed of discrete segments in such a manner that the s flowing through the active region of the laser is introduced from a plenum chamber from whence it flows annularly into the active region and travels through the region both to the left and right of the input until it reaches the first output region. From there the gas flows annularly out into a shaping region and thence into the output plenum.

Abstract: An aircraft stores suspension and release device including extendible ejers for forcibly ejecting an attached store. The extendible ejectors are hydraulically actuated and dependently connected for positive control and the degree of extension of each ejector is independently adjustable. The extendible ejector may be connected together by mechanical or hydraulic linkage which may be gas, hydraulically or mechanically operated.

Abstract: The plastic bonded explosive in obsolete or otherwise rejected warheads is xplosively shocked out of the warheads so that materials from which the explosive is made can be recycled. The process involves placing detonating cord in a cavity left by the removal of the warhead's safe and arm mechanism and/or communications hole, pouring water into the cavity around the detonating cord and detonating the detonating cord.

Abstract: An apparatus for causing a solar energy collector to constantly follow the sun using the sun's radiant energy reflected from an arrangement of mirrors to differentially heat fluid-containing reservoirs to create a differential pressure which is utilized to rotate the apparatus and the collector.