Abstract: A waste treatment composition and process wherein a salt of lignosulfonic acid and a foam-forming surfactant system are applied to nitrogenous waste material.

Abstract: Assembly for filtering compressed gas having dual desiccant-containing filter units each equipped with pneumatically opened and closed inlet and outlet check valves and a pneumatically opened drain valve so connected to each other and a control valve for alternately receiving and exhausting actuating gas as to cause the inlet and outlet valves to close before opening and open after closing of the drain valve. Normally, one unit filters while the other is being regenerated in timed cycles under control of the control valve for maintaining an uninterrupted output of filtered gas, but a regulator valve in the actuating gas supply to the control valve prevents the units from cycling and forces both to filter when the pressure upstream or downstream of the assembly is below a predetermined level.

Abstract: Assembly for filtering compressed gas having a pair of desiccant type filter units each alternating between filtering and regenerating cycles and one filtering while the other is being regenerated and vice versa for maintaining an uninterrupted supply of filtered gas. The filter units are adjacently or remotely mountable and so valved and controlled as to prevent substantial loss of input compressed gas during shifting of filtering from one unit to the other. Filtered gas outlets of the units are connected to opposite ends of a cylindrical purge reservoir containing intermediate those ends a floating piston for diverting to and storing on one side of the piston for subsequent purging part of the output filtered gas from each unit during the unit's filtering cycle and at the same time applying substantially constant pressure for driving gas on the opposite side of the piston from the purge cylinder's opposite end for reverse flow regeneration of the desiccant in the other unit.

Abstract: Method for decontaminating compressed gas, including in the apparatus for performing the method a separator - dryer unit responsive to the pressure of a compressed gas injected thereinto for centrifugally separating contaminants from and cooling the gas, and depending on cooling of the gas for holding a desiccant in the unit within a temperature range of substantially optimum adsorption efficiency. On periodic interruption of the injection, accumulated contaminants are discharged through a quick-opening drain port by the residual pressure in the unit, the reduction of which admits from a separate regenerating tank through a restricted orifice a reverse flow to the drain port of expanded, decontaminated gas for regenerating the desiccant.

Abstract: Solenoid-actuated valve adapted for heavy duty use by having the coil of the solenoid divided into high and low power windings connected in and automatically energized in succession by a solid state control circuit for providing in sequence high power of predetermined short duration for opening the valve and low power of usually longer duration for holding the valve in open position.

Abstract: An assembly connectable between a compressor and reservoir, having a filter unit capable of centrifugally cooling and separating condensed moisture and other contaminants from compressed air and discharging clean air in saturated condition at the outlet temperature and pressure, the unit being connected to the compressor through an inlet valve opening when the compressor begins pumping and to the reservoir through a pressure regulator valve adjustable to open only when the air in the unit reaches a predetermined pressure, which, for minimizing the absolute moisture content of the clean air passed to the reservoir, usually will be substantially maximum reservoir pressure.

Abstract: Method and apparatus for continuously concentrating liquids in a plurality of stages, the apparatus having an enclosure vented to atmosphere and enclosing a like plurality of overhead spaced sets or rows of nozzles and a plurality of troughs, one for and underlying each nozzle set. In each stage, liquid of one concentration is pumped to one nozzle set and partially evaporated by being sprayed from the set, with immediately prior or concurrent heating, as a flat, fan-shaped spray for fall into the underlying trough as a liquid of higher concentration, which, depending on its concentration, is either the starting liquid of the next stage or the product concentrate, the evaporation for air-sensitive liquids being conducted in an environment inert to the liquid.

Abstract: Pneumatic compactor for compacting a particulate desiccant in a compressed gas filter unit, the compactor being automatically chargeable with the compressed gas during the unit's filter cycle and manually dischargeable during the unit's drain cycle.

Abstract: Gauge having a Bourdon tube sealed in a pressure chamber and the tube and chamber connected to a fluid line, respectively upstream and downstream of a restriction therein, for indicating through an indicator operatively connected to the free end of the tube variations in the flow rate in the line by the effect on the tube of pressure differentials across the restriction. An orifice and an equalizing valve in the upstream connection protect the tube against sudden overpressures and limit the maximum pressure differential thereon.

Abstract: A shoe having a stretchable foot opening bounded by a normally gathered binding having a tunnel extending longitudinally therethrough and attached below the tunnel to and extending substantially around an upper edge of a shoe upper, and a stretched elastic tape free floating in and extending through the tunnel, the tape being stretched and the binding gathered by pulling on ends of the tape to pull out end portions of predetermined lengths after the binding is attached to the upper and the stretch being held by securing the end portions together.