Abstract: A fluid composition dispensing system employs a pair of bulk supplies of fluid components which communicate through air-actuated pumps to measurement and dispensing reservoirs. Each of the reservoirs has an associated float switch which is operative to inhibit operation of the associated pump when the reservoir is filled with a desired quantity of fluid component. A dispensing valve assembly is interposed between the two reservoirs to allow for dispensing from the reservoir at predetermined dispensing rates. A mechanical valve assembly has a linkage which is configured to allow the slower flowing fluid to pass through a larger valve orifice such that the dispensing rates of the two fluids are the same.

Abstract: A germicide applicator for cow udders incorporates a dispensing wand having a dispensing ring at an end thereof for applying a germicide solution to the teats of a cow. The dispensing ring has a central aperture sized to receive a teat and allow for the spraying of germicide from circumferentially spaced spray nozzles therein. A source of lactic acid and a source of sodium chlorite are provided in communication with the spray gun and are driven by respective pumps. Valves in the spray gun are actuated by a trigger and allow for the metering of both lactic acid and sodium chlorite in a common conduit within a wand, where they are mixed in the appropriate relationship to achieved the desired germicide. Float valves used in association with the sources of lactic acid and sodium chlorite shut down the pumps when an adequate supply of either is absent.

Abstract: A self-current-limiting device and a method of making self-current-limiting devices. These devices typically comprise melt processable, self-temperature regulating, irradiation cross-linked, electrically semi-conductive polymeric compositions having positive temperature coefficients of electrical resistance. The semi-conductive compositions contain electrically conductive particles, such as carbon black, dispersed throughout the composition in an amount ranging from about 15% to about 20% of the total weight of the composition. Heating cables made in accordance with the invention comprise two or more elongate substantially parallel spaced-apart electrical conductors that are electrically inter-connected by extruded forms of the compositions. The method is characterized by an efficient three step process wherein the semi-conductive composition is extruded over the conductors, radiation cross-linked and annealed.