Abstract: A rod-shaped heater provided is composed of a carbon wire heating element 2 sealed in a small or large diameter quartz glass tube, a small diameter quartz glass tube portions 3a and 3b charged with compressed wire carbon members at opposite ends thereof; a sealed terminal section 10 having connection lines 11a and 11b for power supply held between the compressed wire carbon members charged in the small diameter quartz glass tube. The connection lines and the carbon wire heating element are electrically connected by way of the wire carbon members. This rod-shaped heater using the carbon wire heating element is suitable for readily raising the temperature of the agent in the storage tank of the wet etching agent or the grinding agent.

Abstract: An output controller for low-frequency treatment device for use in a bath, comprising a low-frequency oscillator; a variable water resistor having fixed terminals connected with the output terminal of the low-frequency oscillator; and an active electrode connected with the sliding terminal of the variable water resistor.

Abstract: The invention comprises a variable linear resistor. It comprises a first plate having a recessed area cut into one face and a second plate parallel to and facing the face of the first plate with the recessed area. A length of elastic tubing is disposed in the recessed area. The distance between the two plates is adjustable, and this allows for the compression of the elastic tube.

Abstract: A variable level liquid rheostat having a tubular overflow member between a starting chamber and a tank for controlling the level of electrolyte in the starting chamber. The overflow member has a closed upper end inside the starting chamber and lateral discharge orifices and communicates with the electrolyte in the tank. The overflow member produces a siphoning effect when the electrolyte level in the starting chamber is substantially above the discharge orifices for causing a sudden drop of the level in the starting chamber until the electrolyte level in the starting chamber again reaches the discharge.

Abstract: A current transformer and copper sulfate water resistor are combined to provide a probe capable of measuring very fast, high voltage pulses. The resistor is connected in series with the primary winding of the current transformer and consists of an elongated plastic tube filled with an aqueous solution of copper sulfate. The series arrangement of resistor and current transformer primary winding is applied across the source of voltage to be measured and the current transformer secondary winding output is a function of the measured voltage. The current transformer secondary output is applied to and displayed on an oscilloscope.

Abstract: A conductivity sensor for use in a steam turbine in operation to monitor corrodents being deposited therein. The sensor comprises a bottom substrate on which an electrode pair is located. The bottom substrate also includes a means for measuring the temperature at the bottom substrate. A first layer of dielectric material is bonded to the top of the bottom substrate. The first layer has an aperture formed therein so that an end of the electrode pair is located in the aperture. A second layer of dielectric material is bonded to the top of the first layer. The second layer defines a crevice for entrapping steam-transported corrodents that are deposited in the turbine. A portion of the bottom of the crevice includes the aperture so that corrodents are also deposited in the aperture. By passing a current between the ends of the electrodes located in the aperture, a measure of the conductivity and thus the concentration of corrodents deposited in the aperture and crevice is given.

Abstract: A method of making an electric resistor having a negative temperature coefficient of resistance whose resistance body consists of p-type doped pyrolytic polycrystalline cubic silicon carbide.

Abstract: A time-lapse indicator in which a receptacle contains a fluid material having numerous discrete particles dispersed in a liquid carrier, and a layer of absorbent material in close proximity to the receptacle, the receptacle and absorbent material being separated from one another by a wall which is broken when the time period is to be determined by the indicator. The indicator normally has a pair of electrodes for measuring the resistance of the fluid material after a portion of the liquid carrier has been absorbed therefrom in the absorbent material. Mechanisms for both activating and reading the indicator may be used.

Abstract: The invention relates to an electrolytic resistor comprising a water-repellent insulating tube through which there flows an alkaline solution containing a suspension of zinc. The positive end of the resistor has a metallic grid suitable for trapping the zinc particles, and the negative end has either an air electrode or a ring made of a metal having, more especially, high hydrogen supertension, this ring itself possibly having holes or projections suitable for promoting the progressive deposition of zinc dendrites. The invention is used in zinc-air storage cells.

Abstract: A liquid rheostat includes a conductive element which surrounds multiple electrodes. The element provides a multiplicity of current paths between the electrodes at a given depth of electrolyte solution thus decreasing current concentration of the electrodes. In order to further decrease current concentration, cylindrical electrodes are used. In a second embodiment, the liquid rheostat and an electrolyte storage container are disposed so as to surround a fluid transport pipe of a pumping system, the fluid being transported in the pipe serving to cool the electrolyte. The rheostat and storage container combined with the pipe provide a compact arrangement for saving space in a pump installation.

Abstract: A liquid for a level or a feeler element for the electrical measurement of inclinations and for the determination of the vertical by measuring an electrical current or impedance between surface electrodes, which current or impedance changes as a function of tilting, the electrodes being in contact with the liquid which is contained in a container and each electrode is connected with an electrode terminal which can be contacted from the outside. The liquid contains a major proportion, i.e. at least about 50 percent by weight of hydrazine monohydrate and an effective amount of at least one compatible conducting salt dissolved in said liquid.