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Equipment Used Afloat and Ashore Temperature Control—Clutch—Chain Falls—Portable Tool— Overhead Crane—Cutting Machine—Self Aligning Coupling OR control of temperature in F ssvercooiea internal combustion engines, a new device has been developed by the Edison Electrical Control division, Thomas A. Edison Inc., West Orange, N. J. By its use fully automatic protection from ex- cessive temperaures is now possible. The nucleus of the new device is the Edison seal temperature control. This control is completely sealed in a glass tube from which all air has been evacuated and replaced by an inert gas. The contact points cannot oxidize or become pitted by continu- ous operation. Neither is loss of ealibration due to operation or tamp- ering by an inexperienced person, possible. The temperature control for en- gines consists of this sealed glass tube mounted in a metal tube pro- vided with standard pipe thread and suitable junction box for electrical connections. It may be used in several ways when mounted in the cooling water of a diesel engine as follows: 1. To signal an attendant at a _ predeter- mined temperature. 2. To stop the engine when the temperature ap- proaches the danger point. 3. To hold the temperature of the water constant by varying the flow. The control will operate when a predetermined temperature is reached, whether the temperaure is caused by low water in the cooling system, lack of proper lubrication, or similar reasons. Improved Magnetic Clutch HE best electri¢al control devices gas be used on_ shipboard where interruption to service is al- ways a matter of serious concern. It is, therefore, of interest to note that a new general purpose magnetic Magnetic clutch of improved type 30 clutch with a number of important improvements has been developed by Cutler-Hammer Inc., Milwaukee. An outstanding feature of this new clutch, shown in the accompanying illustration, is the method of adjust- ing the friction faces to compensate for wear and to assure uniform lin- ing engagement. The inner circum- ference of the field ring is threaded and the adjustment is made by rotat- ing the field ring, in respect to the magnet field member, and conse- quently moving it toward the fric- tion surface on the armature mem- ber. When the field ring has been moved forward sufficiently to com- pensate for the wear, it is locked firmly in position. A floating magnet armature is used in the design of the new clutch, mak- ing it impossible to score the magnet pole faces even if proper adjustment on the lining is not maintained Other features include a magnet coil which may be readily removed and replaced as a unit, rugged bronze col- lector rings, a lining wear indicator, and a pilot bearing to insure con- centric engagement. For Lifting and Pulling ESIGNED for use either in the horizontal or vertical position, a new load handling device was re- cently developed by Yale & Towne Chain falls operate for pull or lift Mfg. Co., Philadelphia. Horizontally, it may be used to pull machines into position, moving materials, ete. Ver- tically, it is a hoist which lifts all types of loads up to the capacity of the particular unit. The unit is compact and portable. Moving parts are completely enclosed so that they may be operated in grease and protected from injury. New Marine Coating A CLEAR marine coating for fin- ishing exterior and _ interior natural woodwork has been devel- oped by the Stanley Chemical Co., Hast Berlin, Conn. Initially the new marine coating is of unusual clarity and lightness of color. It has the free MARINE REVIEW—September, 1935 flowing qualities of a varnish and quick drying characteristics. This allows rapid application of the multi- ple coats essential to a good marine finish. Finishing jobs can be sched- uled at two coats per day. Sustained tests, where the finish was alternately submerged at high tide and exposed at low tide, as well as exposure to varying climatic con- ditions, all indicate a marked dura- bility, resistance to the elements, re- sistance to color darkening under sun exposure, to checking chipping, or any other forms of erosion, even after a period of eight months. Na evidence has been found of water spotting, waterlogging or mildewing, Handy Portable Tool HE portable electric tool, shown ae the accompanying illustration, has recently been developed by the Chicago Wheel & Mfg. Co., 1101 West Monroe street, Chicago. Weigh- ing not more than 12 ounces, this tool can be held in the hand or gripped like a pencil for grinding, drilling, polishing, cutting, carving, sawing and engraving. The tool speed is 25,000 revolu- tions per minute and there is ample power to drive a variety of imple- ments. It is 6 inches long overall and 15 inches in diameter. The housing of aluminated duraluminum is streamlined. The electric motor, built into the tool and said to be the most powerful for its weight now on the market, is so thoroughly venti- lated that it does not heat up. This tool operated from any 110- volt, alternating or direct current, 25 to 69 cycles. ITigh speed portable electric tool