Abstract: A method and a measuring device for localizing a damage in a dielectric corrosion resistant layer of a pipe line are described, especially for an enameled pipe line, through which an electrolytically conducting fluid is passed. Localization is achieved by performing a potential difference measurement between two electrodes arranged at the begining and at the end of a supervised region along the length of the pipe line, to which preferably a constant current source is connected, the positive terminal of which is connected with the carrier material of the pipe line and the negative terminal of which is connected with the two electrodes. Preverably a calibration is performed by means of an additional electrode, which can be connected to the measurement region.

Abstract: A method and apparatus are provided for inducing contraction of a paralyzed muscle in a limb. The invention includes a method for providing electrical stimualtion to a paralyzed limb in response to continuous motion of an uninvolved, or unparalyzed limb, as well as an apparatus to implement the method. A method and apparatus are also provided for transporting a person having a paralyzed limb. The transporting apparatus is propelled at least in part by the paralyzed limb which is induced to move by electrical stimulation of a paralyzed muscle in response to continuous motion of an uninvolved limb.

Abstract: The present invention relates to a disposable test kit which contains selected reactants, or reagents, necessary for the rapid concentration and detection of selected antigens from biologic extracts. Typically, and preferably, the time required for concentration and detection is less than one hour. The present kit includes internal false position and false negative controls and suitably has a standard color code to assist in the interpretation of the test results. The present kit is a unitary, compartmented package having a reaction chamber, preferably centrally located thereon, and at least one reagent storage chamber. Each reagent storage chamber is connected to the reaction chamber through a valve means which allows fluid flow from the reagent chamber to the reaction chamber, but inhibits flow from the reaction chamber to the reagent chamber. The top portions of the reagent chambers are fabricated of a flexible, or pliable, material, preferably transparent or semi-transparent.

Abstract: A mercury drop electrode for use in electrochemical experiments. The invention includes a reservoir for liquid mercury, a mercury drop capillary having upper and lower open ends and also having a chemically inert lower capillary tube portion and an electrically conductive upper capillary tube portion supported by the lower portion and in contact with the mercury in the reservoir, valve means including a valve stem having a seal at its lower end and a ferromagnetic portion at its upper end, a valve seat comprising the upper end of the upper portion of the capillary which acts in concert with the valve seal to close the valve, and actuating means operatively arranged to lift the valve seal form the seat to allow mercury to enter the capillary from the reservoir and to lower the seal to the seat to prevent mercury from entering the capillary from the reservoir.

Abstract: The method of the present invention consists of the steps of heating an area along the length of a small diameter glass tube while the tube is being rotated, pulling the heated tube using an unidirectional force to rapidly extend the heated area while mechanically maintaining the heat source centrally located along the portion of the tubing being extended. The extended tubing is subsequently cooled and separated at the narrowed portion to produce two capillary tubes.

Abstract: The method of the present invention consists of the steps of heating an area along the length of a small diameter glass tube while the tube is being rotated, pulling the heated tube using an unidirectional force to rapidly extend the heated area while mechanically maintaining the heat source centrally located along the portion of the tubing being extended. The extended tubing is subsequently cooled and separated at the narrowed portion to produce two capillary tubes. The apparatus of the present invention consists of two independently rotatable, co-axially aligned chucks. The chucks rotate in an essentially simultaneous manner, that is, the speed of rotation of each chuck is essentially the same. Each of the chucks has an adjustable collet thereon adapted to receive and hold a section of glass tubing aligned therebetween. A means of moving one of said chucks away from the other is provided. A moveable heating means is positioned intermediate the chucks.

Abstract: A key telephone system for use with at least two telephone lines that extend between a central office and two or more telephone stations. Each station is capable of responding to a manually-actuated hold select switch by establishing a hold condition on one of the lines and by connecting a line terminating impedance across the line that is to be held. Each station is further capable of monitoring the state of each line, and indicating the state of each line, without applying any indicating signals to the telephone lines. Each station furthermore determines threshold voltages for on-hook, off-hook and hold line states and determines line state by comparison of line voltage with such threshold voltages.