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Equipment Used Afloat, Ashore Motor for Hoists—Boring Bar—Bends Angle Iron—Punch and Shear OR operating rapidly hand power hoists of 5-ton and larger capaci- ty, the New Jersey, Foundry & Ma- chine Co., 90 West street, New York, has perfected an electrie machine that may be suspended in the bight of the op- erating chain. It is claimed to have a ca- pacity to overhaul 138 feet of hand chain per minute anda chain pull of 130 pounds. This gives a load lifting speed of ap- proximately four times that obtained by hand. As is shown in the accom- panying illustration the machine con- sists of an electric motor driving suit- able gears, all of which run in oil. It DEVICE WHICH OPERATES IN BIGHT OF HAND HOIST CHAIN weighs about 160 pounds and is so constructed as to balance itself when suspended in the chain. The device may be equipped to operate on alter- nating or direct current, the power being supplied through a _ flexible conductor attached to convenient sockets or suspended from the hoist if more desirable to bring the feeders to that point. Introduces New Paint to Prevent Rust Prevention of corrosion of steel and dryrot of wood has long been a prob- lem as applicable in the shipping industry as in others. In an effort to minimize the destruction from these two agents, the Non-Corrosive Paint Co. Inc. 11 Broadway, New York, has introduced on the market a paint whose ingredients in- clude an organic wax residue solvent in hydrocarbons which produces an_ elastic and adhesive varnish. This is claimed to be waterproof and has been treated with acetates, oxides, benzol and pigment to produce a quick drying product. The company manufacturing this paint has had various products for the pre- vention of rust under research by its consulting engineers for the. past four years. During this experimental stage various compositions and raw materials were broken down, and reorganized un- der the direction of the laboratories. The experiments conducted during this period has proved points of advantage and dis- advantage that might occur in the manu- facture of a noncorrosive paint and the new paint resulted. The paint is manufactured for the express purpgse of preventing rust, sur- face tension, or electrolysis and the cor- rosive action of free acids. -Wheén the paint is applied to iron or steel that has been properly cleansed by the removal of mill scale or bloom, its adhesion 1s claimed fo be perfect eliminating me- chanically confined moisture. On eliminat- ing moisture between the coating of paint and .the surface of steel, action that will accelerate corrosion or rust is eliminated. The basic reason for the prevention of rust by this paint is chiefly that oxi- dation does not take place during the process of drying, it is claimed. Various experiments which have been conducted by a comparative test with: oil paints of a highly commercial value and this paint have been made. One specific case that was for a test exposure has proven this paint an attractive and dur- able preventative for rust. The experi- mental plate that was used to conduct this test was exposed to the elements for a period of 41 months. At the ex- piration of this period the paint had re- mained intact. , Designs Portable Boring Bar for Marine Shops The portable boring bar for refining taper holes, shown in the accompanying illustration, can be taken readily to any job where it is necessary or desirable to finish a taper hole. This tool was developed by the Pedrick Tool & Ma- chine Co., 3638 North Lawrence street, Philadelphia. In marine shops, it is use- ful for boring or reboring propellers as often the transfer of a propeller to a machine shop at some distance is a diffi- cult operation. The manufacturer claims that it is the only portable appliance for boring taper holes and which is adjustable for any degree of taper. The propeller in process of boring serves as a support for the machine as it locates the crossheads that hold the boring bar. The crossheads have four radially disposed set screws for final and accurate alignment of the bar after it has first been roughly centered. The taper movement of the bar is derived from a cross-slide and yoke into which the bar is secured by a gudgeon pin. The degree of taper is controlled by the distance the slide is moved from its central axis. The lower end of the bars, to which the feed case is attached, describes an orbit and requires a spheri- cally shaped bearing in the crosshead. By PORTABLE BORING BAR USED TO BORE OR REBORE PROPELLERS preventing the handwheel of the feed case from turning, either by means of a weight or some other simple method, the feed becomes constant and automatic. The driving gear is stationary and may be driven by belt, electric motor or air drill in vertical or horizontal positions. Purifies Feed Water for Marine Boilers Elimination of scale forming sub- stances from feed before’ it enters the boiler and delivering the water hot, clean and soft is the pur- pose of a feed water purifier brought out by the Brock Engineering Co., Inc., Arcade building, St. Lonis:- ihe purifier is an ‘attachment which can be applied to any boiler either on the side of the boiler or beneath it if the floor space is limited. The purifier takes its water from the pump or in- water