Abstract: An adjustable cart, comprising in combination a base supported by wheels at least one of which is swiveled to allow cart steering travel, two frames carried by the base to pivot from active upright positions to stored down positions, one above the other, there being upright supports carried by the cart at or proximate cart corners, there being mechanism associated with the frame and certain of the supports to releasably lock the frames in upright extended positions relative to the supports in response to frame pivoting to upright positions, and there being lengthwise adjustable means, associated with each frame, whereby said mechanism is un-blocked to allow frame folding.

Abstract: In a valve, the combination comprises a valve body defining an annular seat, and porting at upstream and downstream sides of the seat; a valve operating handle and stem; a tubular part connected into the body and defining a first side opening facing toward one of the sides; a tubular stopper sleeve received within the tubular part and having an open end projecting through a seat defined opening; and a second side opening rotatable by the stem into and out of registration with the first side opening whereby flow through the valve and stopper sleeve is established when the second side opening registers with the first side opening, and flow through the valve is blanked when the second side opening is rotated out of registration with the first side opening.

Abstract: A sound enhancer for use with a speaker assembly, comprising a sound manifold forming an enclosure having upper and lower hollow interior portions, the enclosure defining an interior zone within an upper interior portion and having an inlet that faces angularly forwardly, and upwardly, a speaker assembly facing rearwardly through an inlet and into an interior zone to transmit sound rearwardly within the upper interior portion, the enclosure having a back panel to reflect sound transmission downwardly toward and into the enclosure lower interior portion, the lower interior portion having a frontward facing outlet from which sound is transmitted forwardly below the level of the speaker assembly.

Abstract: In a drum beating assembly, the combination comprising a frame, including at least one pedestal, an axle carried by the pedestal to rotate relative thereto, the axle having an axis of rotation, a drum beater carried by the axle, a pedal operatively connected to the axle to rotate the axle and beater in response to pedal movement, the frame including a base plate, there being a clamp arm and means supporting the arm on the plate to pivot relative thereto, and multiple drum rim support elements carried to engage the drum rim at multiple locations to support the drum rim relative to the base plate. The support elements are typically pivotable to self-adjust during clamp up.

Abstract: On an aircraft designed for maximum efficient cruise speed in the range from about Mach 0.8 to about Mach 1.2, and having fuselage and wings with: (a) less than about 25 degrees of leading edge sweep, in combination with airfoil thickness to chord ratios between about 3% and about 8%, as an average along the wing semi-span outboard from the zone of substantial fuselage influence, and (b) wing leading edge sweep between about 20 degrees and about 35 degrees, in combination with airfoil thickness to chord ratios equal to or below about 3% as an average along the semi-span outboard from the zone of substantial fuselage influence to the wing tip.

Abstract: A modified purifier process, includes supplying a first stream of a feed gas containing hydrogen and nitrogen in a mol ratio of about 2:1, and also containing methane and argon, then cryogenically separating the feed gas into the following: f) a second stream of synthesis gas containing hydrogen and nitrogen in a mol ratio of about 3:1, g) waste gas containing principally nitrogen, and also containing some hydrogen and all of the methane supplied in the first stream, and splitting the waste gas into: h) a third stream of hydrogen/nitrogen gas i) a fourth stream of high concentrated nitrogen j) a fifth stream of methane rich gas, to be used as fuel. The combined second and third streams typically are passed to an ammonia synthesis process.

Abstract: A pool or spa cover adapted for use with a waterfall chute projecting from the top edge of a pool or spa water receptacle, comprising in combination, the cover having sections hinge connected to allow one section to pivot downwardly toward the waterfall chute while the other section remains peripherally seated on the receptacle, the one section having edge portions adapted to seat on receptacle edge portions at opposite sides of the chute, the one section locally configured to accommodate the cover to the chute as the cover pivots downwardly to seat on the pool or spa receptacle top edge.

Abstract: A method of providing an aircraft having a fuselage and a wing configured for extensive laminar flow at design cruise conditions, the method characterized by a) providing wing biconvex-type airfoils having values of thickness, chord and shape along the wing span which provide substantially optimal aircraft range at design cruise conditions, considering the influences of wing drag and wing weight; b) providing wing leading edges, which are configured to effect laminar flow; c) providing fuselage and wing contours which, in combination, produce reduced total wave drag and produce extensive areas of laminar boundary layer flow on the wing; and d) providing wing sweep angularity that facilitates provision of a), b) and c).

Abstract: The invention concerns a combination control for use in nasal cannula therapy, and includes a high flow, nasal cannula respiratory assistance ducted system, and a pressure relief valve having indicator structure, which typically includes a tubular body, a carrier slidable in the body, a plunger-indicator carried by the carrier, and a spring resisting carrier movement toward a cap on the body that defines an indicator window.

Abstract: A cosmetic powder dispenser, comprising a housing structure forming upper, intermediate and lower compartments, the structure forming through openings in registering walls associated with the compartments, the housing structure including upper and intermediate rotors whereby rotation of the upper rotor enables a metered quantity of powder to gravitate through a first of the openings from the upper to the intermediate compartment, and whereby rotation of the intermediate rotor enables metered quantity of powder to gravitate through an additional opening from the intermediate compartment to the lower compartment, for use.

Abstract: A protective toilet seat cover comprising in combination a sheet of foldable flexible material having an overall size to cover the toilet, the sheet having a top panel defining a through opening to register with and overlie the toilet bowl, the sheet having opposite side panels configured to hang downwardly at opposite sides of the toilet, the side panels having upright front edges, the sheet having a front panel configured to hang downwardly at the front of the toilet, the front panel having spaced edges that extend upwardly and sidewardly to define front panel upper portions separate from the side panels, and that hang in protective overlying relation to front edges of the side panels.

Abstract: An improved protractor with an adjustable narrow arm comprising, in combination a flat, generally planar body having protractor shape, including an angle indicating scale with protruding scale elements in a curved row, the marker arm pivotally carried by the body to be swung successively over the scale elements, the scale elements spaced apart sufficiently to frictionally maintain the marker in selected angle indicating positions relative to said body.

Abstract: A snare positioner configured to extend proximate a drum head comprising an elongated bar means having a length to extend crosswise of the head, first and second holders proximate opposite ends of the bar means, snare wires having opposite ends connected to the holders, the first holder integral with the bar means, the other holder slidably connected to the bar means, and first adjuster means associated with the other holder and bar means for adjusting the position of the other holder lengthwise of the bar means, to adjust the tension of the snare wires.

Abstract: In therapeutic apparatus, the combination comprising an adjustable cradle pressure exerting therapeutic cushion, a flexible sheath housing a cushion, an elongated support operatively connected to a sheath for maneuvering a sheath and cushion into selected position or positions for transmitting pressure between a person and a surface onto which a person's body weight is imposed via a cushion and sheath.

Abstract: In a valve, the combination comprises a valve body defining an annular seat, and porting at upstream and downstream sides of the seat; a valve operating handle and stem; a tubular part connected into the body and defining a first side opening facing toward one of the sides; a tubular stopper sleeve received within the tubular part and having an open end facing the seat; and a second side opening rotatable by the stem into and out of registration with the first side opening whereby flow through the valve and stopper sleeve is established when the second side opening registers with the first side opening, and flow through the valve is blanked when the second side opening is rotated out of registration with the first side opening.

Abstract: In combination with a snare drum having snare wires, a drum head and a side wall, slidable bands endwise connected with the wires, first adjustable mechanism connected with the a band end, and supported by the wall, second adjustable mechanism connected with another band end, and supported by said wall, whereby adjustment of either or both of the mechanism tensions at least one band, and said snare wires.

Abstract: A drum assembly having opposite ends and a cylindrical drum surface extending between the ends, and a central through opening extending between the ends, a support carried in the opening and having an extended position in which a portion of the support projects endwise from the opening and a retracted position in the opening, and there being retention structure associated with the opening to retain the support alternately in positions.