Abstract: Method and apparatus for introducing a first liquid having a high vapor pressure into a second liquid, which comprises maintaining the first liquid under gas pressure in excess of its vapor pressure, and intermittently introducing predetermined quantities of said first liquid under pressure into the second liquid. The pressure of the first liquid remains above its vapor pressure before it is mixed with the second liquid. This method and apparatus is particularly applicable to the introduction of liquid bromine chloride into liquid waste or water.

Abstract: The invention is a differential fill valve apparatus principally for use in treating earth wells, usually in connection with cementing a string of casing into the well bore. The apparatus, at or near the low end of the casing, has a pressure actuated slidable piston which rises as liquid is encountered in the well bore opening parts for admitting liquid into the casing until the pressure from liquid in the casing reaches a predetermined ratio with respect to the pressure in the well bore annulus.Means are provided for locking the piston in its closed position after the casing string is in place in the well, permitting the use of the apparatus as conventional cementing valve apparatus.

Abstract: A force flow valve type shipping bag including a vapor barrier ply, incorporating a valve-like sealable vent communicating between the exterior of the bag and the space between the vapor barrier ply and the inner wall plies of the bag.

Abstract: The invention is a packer cup assembly which attaches to the lower end of the mandrel in the tree saver which is itself attached to the "Christmas Tree" of a well head or the like. The assembly is tubular in configuration and comprises a metal part with internal threads at one end and a thinner walled part at its other end. The outer diameter of the lower end of the metal part is less than the outer diameter of the threaded end part in order to permit an elastomeric sleeve to fit over and extend beyond the reduced diameter end part of the metal part. The outer end of the elastomeric sleeve is flared outwardly and then tapered inwardly to facilitate entry into a string of tubing or the like. The other end of the elastomeric sleeve is bonded to the outer surface of the metal part.

Abstract: The invention is a positive lockout means for circuit breakers in an electrical distribution box wherein a central bar extends from top to bottom of the box between the arrays of circuit breakers. The bar has an array of bores extending into the bar from the top side of the distribution. Rod-like locking elements having a configuration which permits one end of the locking element to pass into a bore in a circuit breaker actuator while the other end is inserted in a bore in the bar to prevent movement of the actuator element so secured. Positive lockout is provided by a cover plate which is positively secured in position over the central bar.