Abstract:
A continuously adjustable liquid mixing device for intermixing selectively adjustable volumes of several liquids comprises a body for holding a plurality of volumes of the liquids including a recess at an upper end. A mechanism is provided for drawing up the volumes of liquid into the body and thereafter expelling the same from a lower end. A volume adjusting selecting mechanism is provided for at least one of the volumes including a rotary element mounted in the recess and frictionally engaging a wall surface thereof for retaining a selected volume that is desired. A rotary drive system is provided for rotating the volume adjustment mechanism and is readily accessible externally of the body for convenient manipulation to select a desired volume. The drive system is movable between an outer operating position for easy manipulation and a retracted position when not in use.
Abstract:
A cassette containing a group of sealed cells is used for delivering doses of fluid to be injected into a sterilizing chamber. After the cassette is automatically positioned over a piercing mechanism, the cassette is moved downwardly so that a cell is pierced. Fluid is then forced out of the cell by pneumatic pressure into an injector valve, which opens in a manner which does not adversely affect a vacuum within the chamber.
Abstract:
A system for controlling the consistency of a material pumped from a reservoir, by introducing an alterant into the material, which system includes a diaphragm-type pump for pumping the material from a reservoir, the pump being driven by a double-acting air cylinder motor controlled by a pilot-operated two-position, four-way air valve having reducing valves connected at its air input ports to create pressure differentials between the input air and the operating air in the cylinder during steady state-operation of the pump. The motor is mounted so as to be relatively movable substantially toward and away from the pump responsively to change in the pressure differentials in the cylinder due to changes in the consistency. A compression spring, forming part of the mounting, is disposed so that under steady state conditions of consistency of material being pumped, an equilibrium exists between the forces acting between the motor and the pump, and the force acting on the motor by the spring, and the motor and pump do not move relatively to one another. A change in the consistency of the material will disturb that equilibrium, causing the motor to move relatively to the pump, and such movement serves to operate a valve that controls the introduction of alterant into the material.
Abstract:
A cassette containing a group of sealed cells is used for delivering doses of fluid to be injected into a sterilizing chamber. After the cassette is automatically positioned over a piercing mechanism, the cassette is moved downwardly so that a cell is pierced. Fluid is then forced out of the cell by pneumatic pressure into an injector valve, which opens in a manner which does not adversely affect a vacuum within the chamber.
Abstract:
A computerized chemical application system for a water treatment system. The water treatment system includes a main header conduit through which water flows. Connected in shunt with the main header is a chemical introduction header of smaller diameter and a lower flow rate than the main header. A computer control is provided to sense the conductivity of a reference water flowing through the chemical introduction header. Injection means are provided to introduce a water treatment liquid into the chemical introduction header and to mix it thoroughly with the water flowing therein. The conductivity of the mixture is sensed, and based upon the differential conductivity and values relating conductivity to concentration for the water treatment liquid (which values are stored within the computer control) the amount of the water treatment liquid introduced is precisely controlled.
Abstract:
A vapor delivery system for the manufacture of an optical preform includes a deposition bubbler (60) and another bubbler (40) referred to as a supply bubbler which is interposed between a reservoir (24) of a liquid and the deposition bubbler. Heat energy is applied to the supply bubbler and to the deposition bubbler to vaporize liquid therein. A carrier gas is introduced into the liquid in the supply bubbler at a location below the free surface and into the deposition bubbler to cause vapor of the liquid to become entrained in the carrier gas and to flow from the supply bubbler into the deposition bubbler and from the deposition bubbler to a substrate tube from which an optical preform is made. Facilities are provided for maintaining sufficient liquid in the supply bubbler and suitable temperatures of the liquid in the supply and deposition bubblers to control the vapor flow into and out of the deposition bubbler to prevent unintended perturbations in the deposition bubbler. As a result, the concentration level of the vapor which is entrained in the carrier gas and delivered to the substrate tube is maintained at a substantially constant value.
Abstract:
System for automatically dispensing a liquid treatment chemical from a replaceable supply bottle into an intermittently flowing liquid stream such as a recirculating water supply for a refrigeration system. The system has a feeder chamber into which the liquid stream flows which is periodically emptied by a siphon tube when the liquid reaches a level sufficient to establish a siphon effect in the siphon tube. The rising level of liquid in the chamber also actuates, by means of a float member, the valve portion of a closure assembly on the inverted top of the supply bottle. The valve portion is fed by a capillary tube and dispenses a predetermined, very small quantity of chemical each time it is actuated. The valve portion is prevented from becoming clogged by chemical crystals during inactive periods by being mounted so that its surface will be flushed each cycle by the water which rises in the feeder chamber.
Abstract:
A boiler for vaporizing liquid hydrogen fluoride has a heat transfer surface arranged to be covered increasingly by the liquid as the liquid level rises so that the heat supplied to the boiler can be adjusted to maintain a constant level of liquid in the boiler and thereby equate the feed rate of liquid hydrogen fluoride to that vaporized. Thus by metering and controlling the feed rate of the liquid the feed rate of the vapor can be metered and controlled.
Abstract:
An apparatus for intermittently feeding a solid particulate material, in which a measured quantity of the particulate material is periodically fed into a cavity of predetermined volume and the particulate material is thereafter discharged from the cavity, substantially all of the particulate material is removed from the cavity by scraping the particulate material from the cavity simultaneously with the discharge of the material from the cavity.
Abstract:
A valve that is particularly useful in biological fluid handling systems includes a body member that has a firm and stable support surface and a flexible sheet member that has a surface for conforming and mating engagement with the surface of the valve body member. A land portion in the surface of one of the valve members separates two fluid flow channels in that member. An actuator is arranged to flex the sheet member between a first position in which the surface of the sheet member is in mating and sealing engagement with the surface of the body member to sealing block flow between the two channels, and a second position in which the sheet surface is spaced from the first position to allow fluid flow across the land surface between the two flow channels.