Abstract:
An apparatus for treating fluids emitted by, for instance, a septic tank comprising, a container having a fluid inlet and a fluid outlet, the container being adapted to receive an elongated, holding member, adapted for holding a supply of the treating agent and to automatically feed it downwardly into contact with the fluid to be treated as the latter flows through the container via the inlet and the outlet, and wherein vertically spaced means are provided in the container for supporting the holding member in the container and for guiding the latter into predetermined position in the container when assembled therewith; the holding member can be readily removed from the container for replenishment of the treating agent upon exhaustion thereof, and then can be reinserted back into the container. The apparatus is adapted to be buried in the ground and is provided with a removable cover means for providing access to the open upper end of the container thus providing access to the holding member. In one embodiment, an extension member is provided adapted for coaction with the container proper, for extending the height of the container to adapt the apparatus to different buried depths of associated septic tanks.
Abstract:
An apparatus comprising a delivering device including a probe and operative to suck at least one kind of liquids such as a plurality of reagents, samples or the like from respective vessels into the probe and deliver the liquid thus sucked from the probe into a reaction vessel. In such kind of delivering apparatus, provision is made of the improvement in which the probe is movable along a given moving path, the vessels containing the liquids to be delivered being provided with suction openings arranged at a plurality of fixed positions along the moving path of the probe, and in which the reaction vessel is movable along a path adjacent to and crossed with the moving path of the probe, and in which provision is made of means for locating the probe at any sucking position or at a delivering position with respect to the reaction vessel where the moving path of the probe is adjacent to or crossed with the moving path of the reaction vessel.
Abstract:
The apparatus comprises a turntable carrying, in a circular array centered on a central rotational axis of the turntable, a plurality of vials extending below the underside of the turntable. A stepper motor imparts stepwise rotational motion to the turntable so that during dwell periods of the turntable, specimens in the vials can be investigated optically.Air in a space below the turntable and bounded laterally and at the bottom by an enclosure is circulated by a rotating vane, and a thermistor, responsive to the temperature in the region of the vials, controls a heater in the space below the turntable so as to maintain the temperature of the vials substantially at a predetermined value.In order to dispense liquids into the vessels at predetermined temperatures, the apparatus additionally includes a liquid dispenser mounted adjacent the turntable and comprising a tubular body with an electric heating coil and a dispensing device which dispenses liquid from the outlet of the tubular body in predetermined quantities, the heating coil being supplied with the necessary quantity of power to maintain the temperature of the dispensed liquid substantially at a predetermined value.Preferably, the apparatus is used for analyzing blood specimens.
Abstract:
The invention relates to a method and apparatus for controlling the pH in a continuous flow vessel into which process material is fed through a feed channel and controlling chemical solution is fed through a control channel and in which the pH is measured at an output part of the vessel in order to effect the control by controlling the control chemical feed according to the feedback method, the value of a reference variable being given by a pH number. According to the invention the result of the pH measurement as well as the reference value are transformed to the hydrogen ion concentration or to another concentration quantity unambiguously depending on said hydrogen ion concentration, a final feedback quantity is determined by means of an equation describing dissociation equilibria in the solution, said feedback quantity being a function of the concentration quantity derived from the pH measurement and eventually a function of an independent concentration quantity derived from an other measurement at the vessel output, a final reference value is determined by means of said equation, said final reference value being a function of the concentration quantity derived from the initial reference value, and, eventually, a function of the independent concentration quantity mentioned, a control deviation is formed as the difference between said final reference value and said final feedback quantity, and, finally the feed of the controlling chemical is controlled on the basis of said control deviation, typically using a linear controller and an actuator controlled thereby.
Abstract:
In an apparatus for the pulse-wise dispensing of very small amounts of liquid controlled with a measuring instrument. The measuring instrument comprises an ejector for the pulse-wise ejection of a desired amount of liquid and a measuring vessel having a volume greater than the volume of the liquid to be ejected for each pulse. The measuring vessel has an outlet connected to the ejector and a cross-section of the vessel is adapted to the amounts of liquid to be controlled. A sensing apparatus has an upper and lower sensing device positioned at the vessel and responsive to the level of the liquid therein with an accuracy of about from 1 to 5 amounts of liquid to be ejected and which generates a signal when the upper and lower sensing devices are activated. A pulse generator is synchronized with the ejector and a counter receives counting pulses from the pulse generator and is activated to start by the upper sensing device and to stop by the lower sensing device whereby the known volume in the vessel, divided by the number of pulses counted by the counter, measures the amount of liquid ejected by the ejector for each pulse.
Abstract:
Metering device for metering a fluid into a liquid to obtain a treatment liquid having variable physical parameters depending on the concentration of the fluid to be metered into the treatment liquid. The device comprises a container having an inlet for the liquid, an outlet for the treatment liquid and an inlet for the fluid to be metered. First valve means provided at the inlet for the liquid are effective to control the flow of the liquid into the container according to the level of the liquid in the container. Second valve means provided at the inlet for the fluid to be metered control the admittance of the fluid to the container. Means are provided for controlling the opening, and alternately the closing, of the second valve means and comprising a member responsive to the value of one of the physical parameters of the treatment liquid to alternately control the opening and the closing of the control means for the second valve means, according to the absence, or respectively presence, of a predetermined value of one of the physical parameters of the treatment liquid.
Abstract:
A method of and device for delivering measured quantities of liquid into a fluid in which a pressure differential is created in a fluid flow line and fluid is passed from the higher pressure side to a positive displacement fluid pump and returned therefrom to the lower pressure side and including a positive displacement liquid pump actuated from the fluid pump which feeds liquid to the fluid pump to mingle with the fluid passing back to the fluid flow line.
Abstract:
A simplified chemical dispenser apparatus capable of dispensing a predetermined amount of a treatment chemical into a fluid includes a porous matrix exhibiting capillary action when the fluid contacts a surface of the matrix, a fluid treatment chemical composition located on a surface of the matrix, and housing means for covering said chemical composition and at least said chemical bearing matrix surface to shield against dripping or splashing from the top or sides. The housing may be applied as an envelope in which case the chemical supported upon the matrix is sealed therein.
Abstract:
The invention concerns a novel automatic metering system for producing a liquor containing a predetermined concentration of at least one component thereof, which comprises a mixing tank in which the liquor components are mixed, a metering device adapted to meter out at least one of the components into the mixing tank, an analyzer adapted to measure the concentration of the component(s) required at a predetermined concentration and a data processing unit, with an input from the analyzer and an output to the metering device, being programmed to effect an operational cycle which comprises computing the deviation of the measured concentration from the predetermined concentration of the component(s), correlating the deviation with the amount of at least one of the components necessary to be metered out, substantially to reduce said deviation by a reduction factor of less than 100 percent, and automatically operating the metering device to meter out the correlated amount, and to repeat said operational cycle until the predetermined concentration has been substantially reached, and a method of operating the system.