A reagent container for use in a sample and reagent transfer system is of sector shaped configuration and has a generally vertical curved outer wall, generally vertical side walls that are disposed and angled to one another, a generally horizontal top wall with two ports through which two probes may concurrently be inserted, a generally horizontal bottom wall that has a well portion below and aligned with one port in the top wall, and a dry well channel that is open at its bottom and aligned wit...

A cable pulley transmission has a plurality of pulleys with flight receiving pockets, an endless cable trained about the pulleys, and a plurality of flights located at spaced intervals along the cable. The flights on the cable fit into the flight receiving pockets of the pulleys for transmitting motion between the pulleys and the cable. Each of the flights are formed by two half-sections that are mounted together about the cable. Such a transmission can be used as a lift for liquid. One pulley i...

A liquid filter having a casing with liquid inlet and outlet and characterized by a filter element comprised of a multitude of absorbent cellulosic cloth discs, such as terry cloth, in compressed stacked face-to-face relation around a tube disposed between the inlet and outlet. The tube is open at one end and closed at the other and perforated along its length. The liquid to be filtered is forced to pass radially between adjacent cloth discs between the perimeters of the discs and the tube. Diss...

A readily portable and adjustable apparatus having an agitating means for contacting and agitating a liquid, adjusting arm elements for porting, positioning and adjusting said agitating means in said liquid, and a power source in operable association with said agitating means. Said power source can be a wind motor, an electric motor or combinations thereof.

A liquid dispenser in which liquid is transferred from a container as by capillary action to a retaining member such as a spongy mass and then expressing means selectively compressing the retaining member at the desired time to force expressed liquid therefrom and conveying means such as a trough structure for conveying the expressed liquid away from the retaining member and the container.

Improved electrode performance in a magnetohydrodynamic device is obtained with an electrode structure which includes a liquid (molten) portion in electrical contact with the electrically conductive gas stream. The liquid is highly electrically conductive and, when employed as a cathode, it has excellent electron emission characteristics at and These presently employed practical operating temperatures in MHD devices. Tese properties are retained during continuous operation over long periods of t...

A film gate adapted for use in a film projection printer, wherein liquid is directed against both surfaces of a film as the film is guided through the gate. The liquid flows from jet orifices positioned near the optical windows of the gate, away from the windows, to vacuum orifices positioned adjacent the entrance and exit ends of the gate. The vacuum orifices remove the liquid from the film. The movement of the fluid from the jet orifices to the vacuum orifices "sweeps" and coats both film surf...

A liquid dispensing system for selectively dispensing a plurality of different liquids includes a separate reservoir for each of the fluids, and a separate nozzle for dispensing each of the fluids. A separate hydraulic dispensing system having a cylinder containing a piston is connected to each reservoir and nozzle for removing fluid from each reservoir and feed the liquid to the respective nozzle. A single hydraulic operation system including a cylinder containing a piston is connected to each ...

A method for filtering liquids having a dielectric constant less than 10 is disclosed. The method includes the step of filtering a liquid through a porous layer of an electret, the electret consisting of a fibrous sheet having a surface charge density of at least 5.times.10.sup.-11 coulombs/cm.sup.2, wherein on the upstream side of the electret is laminated another porous layer having at least a porosity or an average fiber diameter greater than that of the electret layer. The upstream layer may...

The rate of mass transfer in liquid/liquid extractions can be increased by the appropriate selection of a solubilizing liquid to wet a microporous membrane. A solute is transferred between immiscible liquids across the membrane where and interface between the liquids is immobilized at a surface of the membrane.