Abstract: A pitboard which is installed in a bowling alley between the lane and the pin and ball pickup having a hard slippery surface which facilitates the rolling and sliding of the pins and balls. The pitboard has a foam core for absorbing sound, and the pin-supporting surface is textured with smooth raised surfaces which permit dirt particles and oil to accumulate between them.

Abstract: A pool ladder for use by individuals confined to a wheelchair having a top step which is at a height substantially equal to the height of a wheelchair seat, and a second step which is at a height slightly above the wheelchair foot rests. Both the top step and the second step are moveably connected to the ladder so as to allow them to be moved aside during standard use. A series of support members serve a dual purpose by supporting the steps of the ladder and also providing handgrips for one entering or exiting the pool.

Abstract: The oscillating element in a microbalance is provided with a filter on its oscillating end for the entrapment of matter whose mass is to be determined by passing the medium containing such matter therethrough. The oscillating element itself is hollow and the medium passes first through the filter and then through the oscillating element.

Abstract: Nitric oxide, an odd-electron molecule, has been found to react with m-phosphoric acid to displace hydrogen and form nitrosyl m-phosphate. The addition of water to the nitrosyl salt regenerates the m-phosphoric acid, half the nitric oxide and the other half as nitrogen dioxide which can then be converted to nitric oxide in an oxidation process. These reactions thus form a cyclic process for obtaining hydrogen from water with low level energy.

Abstract: A liquid-sealed envelope contains a core of resilient urethane foam saturated with water, all air having been expelled therefrom. This assembly is enclosed within an outer casing of a resilient material to which the envelope is glued.

Abstract: A hanger type device that holds ties through the use of clamps which press the ties against the crossarm over which they are draped. The clamps can all be released simultaneously by raising a ring located within a recess at the center of the hanger, and a lock, also centrally located, can be engaged to maintain all the clamps in an open position.

Abstract: A pair of exercising bars with flexible shafts and a plurality of rollers mounted thereon are anchored at one end at selected heights. This enables the operator to stand between them and massage two different parts of his body at the same time, adjusting the height as necessary.

Abstract: A motive power battery casing is blow molded in an oblong configuration of rectangular cross-section. The die is notched so as to create longitudinal ribs of relatively greater thickness of the molding material in a generally cylindrical parison. The casing mold is vented in the bottom at its corners to assure full development of the casing corners. The casing is formed with relatively thin side walls and a relatively thicker collar of the molding material near its top in order to provide sufficient strength for heat sealing at the top.

Abstract: A portable shield intended to block the student typist's view of the keyboard and cylinder is made of cardboard having creases for folding at convenient locations. One portion of the shield screens the keyboard while another portion screens the cylinder. A relatively long extension member is attached to one side of the keyboard portion, extends downwardly along one side of the typewriter and is folded to pass under the feet of the typewriter in order to hold the device in place. The keyboard shield portion is also flexibly attached to the top of the typewriter so that the operator can raise the keyboard portion simply by raising his wrists against the bottom of it. This will enable him to check the position of his hands on the keyboard.

Abstract: An improved friction heat generator of the type having stationary and rotatable friction disc assemblies with a thin fluid film there between, driven by either a variable or constant power source. In either case, the disc interface pressure, which is perpendicular to the disc surfaces, is hydraulically regulated by an oil pump so that it is proportional to the rate of rotation of the generator's drive shaft. The heat generator incorporates an air compressor, to convert driving power energy into compressed air energy when the driving power is below the threshold level required to generate a useful quantity of heat output. The compressed air is stored in a storage cylinder. Hydraulic means are provided to deactivate air compression while the driving power energy is at or above the threshold level required to generate a useful quantity of heat output. Heating chambers are within each disc assembly. Heat transfer fluid is circulated so that it must pass through the heating chambers of each disc assembly.

Abstract: A boot-like appliance is formed of a resilient or inflatable material intended to generally envelop a patient's foot and lower leg area. The device is provided with suitable apertures to eliminate pressure points at bony prominences. Valves are provided in the inflatable model in order to permit the circulation of gases, liquids, or semisolids.