Abstract: Navigation table attachable by an arm to the base of an aircraft seat can be folded to a storage position beside the seat when not in use. The table surface comprises the top of a box which can be used for the storage of maps or papers. The box is mounted so that it can be easily removed from the seat and used by the pilot like a small attache case to transport maps and other materials to and from the aircraft. A plurality of adjustments on the table mounting arm permit the table surface to have its surface angle varied in addition to being movable, sideways, up and down and fore and aft.

Abstract: Side arm for a vehicle seat may be pushed on or pulled off a mounting bracket attached to the frame of the seat without disturbing the upholstery of either the seat or the arm. The arm has three pins of different lengths which are pushed into three holes in the mounting bracket. The intermediate length pin is mounted near one end of a normally bowed spring plate so as to normally be axially skewed relative to the other pins. During assembly, a chamfered guiding surface on the lead end of the shortest pin engages the edge of a hole in the mounting bracket. As the short pin is pushed through the plate portion of the bracket, it initially forces the skewed pin to move relative to the arm so as to bend the spring and cause the skewed pin to become parallel to the other pins. After the skewed pin has passed through the plate the skewed pin returns under the force of the spring to its skewed position to retain the arm on the bracket.

Abstract: Foamed structures such as those formed of rigid polyurethane can be easily reinforced by a plurality of layers of reinforcement material spaced relatively uniformly throughout their thickness by coating or covering the layers of reinforcement material with absorbent material such as paper, stacking the layers at the bottom of a mold, adding the liquid resin, and curing the resin after it has had sufficient time to wet the absorbent layers. As the resin on the absorbent layers foams, the layers of reinforcement will be simultaneously lifted and spaced from each other to provide uniform reinforcement without the need for special molds or the labor usually required to position spaced layers of reinforcement.

Abstract: Height adjustment mechanism for a suspended vehicle seat permits the seat height to be adjusted relative to its supporting frame after the seat has been adjusted for the weight of the occupant. A plate (movable with the suspension) having notches or teeth on one edge is adjustably locked relative to a channel (movable with the seat) in which it can slide by a handle actuated pivoted latch member.

Abstract: Hollow molded plastic support member for use in forming a variety of traffic warning devices has an inverted Y-shape which forms a pair of spaced angled legs and a vertical post portion. The post portion includes a pair of vertically elongated, spaced apertures defined by integral plastic connecting walls which space the opposed planar side portions of the support member from each other. An opening in the post portion permits ballast to be loaded into the hollow interior of the legs. A single support member can be used in combination with a vertical member having portions which snap fit with the apertures to form a three-legged sign or light support. Pairs of support members can be used with a variety of disclosed cross bar arrangements to form barricades and warning signs. The snapfit design of several of the disclosed warning devices permits the devices to come apart when hit by a vehicle without causing damage to either the vehicle or the warning device.

Abstract: Improved forming method permits a flat laminate panel comprising a thin, deep vacuum formed thermoplastic face surface member bonded to a rigid backing member to be bent sharply so as to form the sides and front of a cabinet, for example, in one integral piece. The bends are accommodated by removing material from the back of the panel so as to form V-grooves whose included angles are equal to the angle of bends desired. The grooves extend through the entire thickness of the backing member and a portion of the plastic layer. A small bead of hot melt adhesive placed in the groove serves to soften the plastic so it can be bent without cracking. The panel sections adjacent the V-grooves are then brought into contact and immediately and permanently bonded together by the adhesive, thus eliminating the need for additional bracing while the adhesive sets.

Abstract: Measuring cell for determining oxygen concentration in a combustion engine exhaust stream utilizes a wafer or disc of stabilized ZrO.sub.2 as a solid electrolyte. A pair of concentric metal tubes having oppositely directed flanges contact electrode surfaces on the wafer and provide rugged electrical connections thereto. A pair of tubular ceramic sleeves positioned between the metal tubes electrically insulate the metal tubes from each other, seal (with the help of high temperature ceramic fiber gaskets) the wafer from leakage of exhaust gases to the reference side of the cell and space the wafer from the outer metal housing. The ceramic sleeves also maintain high temperature sealing and contact pressure between the tube flanges and the electrodes by virtue of the fact that they have a greater longitudinal length subject to temperature expansion than does the metal housing, thus making up for the fact that their temperature expansion coefficient per unit of length is lower.

Abstract: Portable, self powered water pumping apparatus for use in sampling water in remotely located wells comprises a wheeled hose reel cart which supports a long length of plastic hose or tubing. The tubing has a small diameter length of inner tubing telescoped inside itself throughout most of its length. The inner tubing passes through the wall of the outer tubing near the upper end thereof and is connected to a pressurized cylinder of gas such as a standard 14 oz. propane gas cylinder. When the lower ends of the tubes are well submerged beneath the water level in a well, admission of gas to the inner tube at its upper end will force water up through an annular space between the tubes and out the upper end of the outer tube where it can be collected. A channeled plug at the bottom of the tubes prevents the tubes from collapsing, helps to keep them straight and together as they are lowered into the well and provides partial support for a weight hanging from the bottom of the tubes.