Elongated structural steel members are conveyed in a continuous operation longitudinally through a spray washer, a shot blast cabinet, an acid spray, an acid blowoff, a chloride flux spray and finally a flux blowoff to remove excess flux. The members are then passed through a preheat furnace to dry the flux and preheat the members and are then dipped into a molten zinc bath and removed therefrom supported upon C-hooks which are designed to be vibrated to remove excess molten zinc from the coated...

A compression mold having in its walls conduits containing sponge material and a substance wetting said sponge material. This equalizes the temperatures occurring in the mold and prevents the buildup of heat at internally situated parts of the mold. A method of using conduits of the above-described type, which method involves placing such conduits in the walls of a mold, so that heat buildup and nonuniform temperatures in the mold are avoided.

The brazing of materials by means of a flow of heated gas.

Sawmill methods are provided including automatic log turning methods in combination with improved non-defacing gripping techniques. A pair of gripping arms engage a log on a headblock at oppositely located points adjacent the vertical portion of the headblock so as to be offset with respect to the center of a log. After a first saw cut, the upper gripping arm is removed and the lower gripping arm is raised to rotate the saw log. In a further aspect of the method, a projecting bumper is provided ...

Apparatus and method for use in the measurement of the water or solvent potential of selected samples. The apparatus utilizes a psychrometer principle, which, broadly speaking, relies upon comparison between wet and dry bulb temperatures in a controlled system for obtaining desired measurements. A thermocouple utilized in making psychrometer measurements is concealed within a small psychrometer chamber and is exposed to the sample during testing, being sealed from surrounding environment. The ps...

This invention provides a method of and apparatus for the deep bed filtration of a liquid containing fine particles (generally on the order of less than 0.005 inches) to obtain an effluent of exceptional clarity. It has been discovered that filtration to this degree of clarity requires a compacted filter medium bed and that this bed compactness must be preserved during rejuevenation of the bed to avoid the dispersal of previously removed dirt particles throughout the filter medium. In this inven...

A method for presenting focused images at a predetermined magnification in an optical system having narrow format and fixed object and image planes. The lens with a nominal focal length suitable for the system is manipulated according to the invention by rotating it to change the total conjugate of the optical system while maintaining a fixed physical distance along the principal ray of the imaging system between the object and image planes.

Photomechanical apparatus and procedures are applied to obtain controlled manipulations of image representations having particular utility in topographic mapping including slope mapping, relief shading, and symbol discrimination. Negative and positive transparencies are made photographic copy in the apparatus for enabling production of enhanced and reduced versions of representations, respectively. Spaced beams from revolving light sources are directed to pass through such copy so as to expose p...

Activated alkenes or alkynes are hydrophosphinylated by a method comprising reacting an activated alkene or alkyne with a trialkyl phosphite in the presence of an ammonium halide so as to produce phosphonates useful in resin production. Some new phosphonates are also produced by this process which have the formula ##SPC1## Where R is hydrogen, alkyl having up to six carbon atoms or phenyl; R' is alkyl having up to twelve carbon atoms; and A is an electron-withdrawing substituent. These phosphona...

Encapsulation is effected by freezing an aqueous composition of the material to be encapsulated and thereafter contacting frozen particles with a hydratable salt. The frozen particles are sized prior to contact with the hydratable salt. Water provided from the frozen particles and hydratable salt are reacted to form the encapsulating coating of hydrated salt.