Abstract: A system for catching and containing a spill of a liquid from a rail tank car consisting of a series of catch pans attached end-to-end and placed between the rails of a railroad track is provided. The end walls of each catch pan are shorter than its side walls, with the catch pans located at either end of the series having an end wall extension attached to raise the height of the end wall to that of the side walls. A sealing gasket is placed between adjacent catch pans, and at least one opening extends through the end walls and the sealing gasket between adjacent catch pans. A drain is located in the bottom of at least one of the catch pans.

Abstract: A system for catching and containing a spill of a liquid from a rail tank car consisting of a series of catch pans attached end-to-end and placed between the rails of a railroad track is provided. The end walls of each catch pan are shorter than its side walls, with the catch pans located at either end of the series having an end wall extension attached to raise the height of the end wall to that of the side walls. A sealing gasket is placed between adjacent catch pans, and at least one opening extends through the end walls and the sealing gasket between adjacent catch pans. A drain is located in the bottom of at least one of the catch pans.

Abstract: An apparatus for locking doors and gates is disclosed. The apparatus generally comprises a housing containing a permanent magnet and an electromagnet for locking and unlocking the door or gate and contact means on the door or gate for engaging the permanent magnet in order to lock the door or gate. The electromagnet, when energized, has a magnetic field opposing the magnetic field of the permanent magnet to magnetically disengage the permanent magnet from the contact means.

Abstract: Method of and apparatus for continuously reducing oxides which form on the surface of copper bar and rod during casting including means for collecting cleaning mixture vapors; means for raising the temperature and pressure of the collected vapor; means for lowering the temperature of the collected vapor below the temperature at which the vapor will condense without lowering the system pressure; and means for separating condensed cleaning mixture from uncondensed vapor as the uncondensed vapor is being conveyed to a furnace or other means for oxidizing residual vapor.

Abstract: Method of and apparatus for controlling the liquid-steam interface in a continuous vulcanization system which includes the steps of selecting a preferred water-steam interface position within a curing tube, detecting the elevation of water in the tube by a water sensitive sensing means, converting the detected elevation data into a signal, and controlling the position of the interface according to the signal.

Abstract: A method of and apparatus for the immersion treatment of discrete lengths of galvanized conduit to inhibit the formation of "white rust" on the conduit surfaces are disclosed. The conduit is continually conveyed successively through three treatment zones comprising a cleaning bath containing a cleaning agent which removes lubricating oils, greases, dirt and the like from the conduit interior and exterior surfaces, a rinse bath and a coating bath containing a coating agent including chromate ions and a polymeric coating composition. A rotary star wheel-type conveyor is arranged in each treatment zone for transporting the conduits in spaced, substantially parallel relation to each other about an arcuate path through each bath and for inclining the conduit above the bath for a time effective to drain excess liquid from the interior and exterior conduit surfaces. Effective draining of excess liquid prior to entry to another zone minimizes contamination of the various baths and yields a high quality product.