Abstract: A measurement system includes an atomizer, an impactor, a particle counter, and a discharge reservoir. The atomizer has a liquid intake port and a gas intake port configured to aerosolize a liquid received at the liquid intake port. The impactor has an inlet coupled to the atomizer and has a first output port and a second output port. The impactor is configured to separate droplets wherein those droplets smaller than a selected cut point are directed to the first output port and those droplets larger than the selected cut point are directed to the second output port. The particle counter is coupled to the first output port and is configured to count particles larger than at least one particle size cut point. The discharge reservoir is coupled to the second output port.

Abstract: The invention provides a process and composition for preparing steel surfaces for adhesive bonding. The process involves contacting the steel article with an etchant composition containing phosphoric acid and a liquid polyhydric alcohol such as propylene glycol, diethylene glycol or glycerine. The process produces steel surfaces, which when adhesively bonded yield joints much stronger than those obtained by abrasive blasting, and comparable to those obtained by use of phosphoric acid-ethanol etchant compositions without the hazards of the latter.

Abstract: A chromate-free etching process and composition for treating aluminum parts o prepare a surface for durable adhesive bonding to other parts, which avoids the toxicity and disposal problems attending the use of conventional chromate containing etching baths. The process utilizes an etchant composition composed of an aqueous solution of nitric acid, alkali metal sulfate, ferric sulfate and preferably also sulfuric acid.

Abstract: An electrolytic cell which comprises a standard calomel electrode supported n a container containing an etchant and a sample of the alloy or metal to be etched are electrically connected to a millivoltmeter or an X-Y recorder. The variation in potential generated by the electrolytic cell is measured as a function of time and used to determine the optimum time at which to end the process.

Abstract: A control device having an actuator housing and a differential pressure responsive housing secured together so that a certain change in differential pressure in the pressure housing will cause a movable part thereof to move to a new certain position thereof and cause a lever arrangement in the actuator housing to operate an actuator therein. An actuating pin extends between the housings and has opposed ends respectively engaging the movable part of the pressure housing and the lever arrangement of the actuator housing to translate movement therebetween, the ends of the pin not being attached to the movable part and lever arrangement. A tubular bearing means is secured to the pressure housing and telescopically receives the actuating pin therethrough, the tubular bearing member being in fluid communication with the pressure housing so as to provide a fluid bearing for the actuating pin.

Abstract: The invention relates to coating devices and methods for application of sant to ammunition. Provided is a mechanically simple and effective way of weatherproofing or coating high volumes of small caliber sabot ammunition or similar items. The coating device typically consists of a container device, which is chamber of sufficient size and volume to hold sealant, covered by an integral lid comprising a frame holding a diaphram, sealant and means for applying the sealant. The frame and the diaphram are provided with aligning holes. The holes are sized to permit the object to be coated to penetrate through the frame, and deformably penetrate through the diaphram into the chamber and contacting the sealant and means of application. The means to apply the sealant may be a sealant dip, a series of spray jets to spray the sealant, a felt stamp pad, a fluidized bed, various combinations of these or any other type of application means to uniformly coat the object.