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Making auto motors and parts
436
CURRENT TOPLCS.
Making Auto Motors and Parts. E. F. LAKE. (Amcrr. _iWacdz., xxxiv, gs.)---This article gives some methods and machines employed in machining the engine cylinders, piston rods and small levers. Testing and balancing the fly-wheels. The means employed to test the assembled motors, transmissions, rear axles and springs of an automobile. To those interested this article will be found valuable. Fire Engine Work. F. A. STANLEY. (A~zer. _%Jac~?.,xxxiv, article will repay careful perusal by those interested. It refers to the construction and application of a drill-press device for chucking work of irregular outline for drilling and tapping. They are presented either side up to the tools and can be set easily in any position under the spindle. Some boring, facing, and tapping tools for mounting directly on the end of the spindle are described. I 12. )-This
Color Screens on Celluloid Films or Coatings. (Eng. Patent of C. SPAETH, 23,138, Oct. 6, Igro.)---In the preparation of color screens by successively staining portions of a celluloid surface with solutions of different dyestuffs, it is proposed to dilute the solvent used for making the solution more and more for each successive staining; as in this way the previously stained surfaces are not affected by the more dilute solutions. A celluloid film may be coated on each side with a thin layer of rubber and on one of these layers a series of lines is scratched to expose the celluloid surface; the film is now dipped in a solution of 2 Gm. of Victoria Blue in IOO C.C. of absolute alcohol, washed and dried ; a second series of lines is scratched on the surface, preferably perpendicular to the first, and the film immersed in a solution of 2 Gm. of Auramine and I Gm. of Ethyl Green in 150 C.C. of 80 per cent. alcohol, washed and dried. The remaining rubber coating is washed off the one side of the celluloid, and the film is immersed in a solution of 2 Gm. of Rubin and I Gm. of Auramine in 150 cc. of 60 per cent. alcohol. The resulting screen will consist’ of blue lines and green and red squares. Constitution of Troostite. A. MCCAWCE. (Eqineering, xc, gas.)--I( Troostite ” is the micrographic constituent of steels discovered and described by Osmond. Microphotographs of steels show that the carbon content of troostite may vary, and that it should not be considered as finely divided pea&e, although being a transition product, it is a stage in the development of pearlite in the same- sense as martensite is,, and pearlite may be obtained ultimately from both martensite and troostite. From a discussion of the curves given for the expansion of a bar of. steel, for the residual magnetism, for the changes in ,magnetic intensity on reheating, and for the variation in density on tempering, it is concluded that troostite is amorphous and uncrystallized a-iron which has not
CURRENT TOPLCS.
Making Auto Motors and Parts. E. F. LAKE. (Amcrr. _iWacdz., xxxiv, gs.)---This article gives some methods and machines employed in machining the engine cylinders, piston rods and small levers. Testing and balancing the fly-wheels. The means employed to test the assembled motors, transmissions, rear axles and springs of an automobile. To those interested this article will be found valuable. Fire Engine Work. F. A. STANLEY. (A~zer. _%Jac~?.,xxxiv, article will repay careful perusal by those interested. It refers to the construction and application of a drill-press device for chucking work of irregular outline for drilling and tapping. They are presented either side up to the tools and can be set easily in any position under the spindle. Some boring, facing, and tapping tools for mounting directly on the end of the spindle are described. I 12. )-This
Color Screens on Celluloid Films or Coatings. (Eng. Patent of C. SPAETH, 23,138, Oct. 6, Igro.)---In the preparation of color screens by successively staining portions of a celluloid surface with solutions of different dyestuffs, it is proposed to dilute the solvent used for making the solution more and more for each successive staining; as in this way the previously stained surfaces are not affected by the more dilute solutions. A celluloid film may be coated on each side with a thin layer of rubber and on one of these layers a series of lines is scratched to expose the celluloid surface; the film is now dipped in a solution of 2 Gm. of Victoria Blue in IOO C.C. of absolute alcohol, washed and dried ; a second series of lines is scratched on the surface, preferably perpendicular to the first, and the film immersed in a solution of 2 Gm. of Auramine and I Gm. of Ethyl Green in 150 C.C. of 80 per cent. alcohol, washed and dried. The remaining rubber coating is washed off the one side of the celluloid, and the film is immersed in a solution of 2 Gm. of Rubin and I Gm. of Auramine in 150 cc. of 60 per cent. alcohol. The resulting screen will consist’ of blue lines and green and red squares. Constitution of Troostite. A. MCCAWCE. (Eqineering, xc, gas.)--I( Troostite ” is the micrographic constituent of steels discovered and described by Osmond. Microphotographs of steels show that the carbon content of troostite may vary, and that it should not be considered as finely divided pea&e, although being a transition product, it is a stage in the development of pearlite in the same- sense as martensite is,, and pearlite may be obtained ultimately from both martensite and troostite. From a discussion of the curves given for the expansion of a bar of. steel, for the residual magnetism, for the changes in ,magnetic intensity on reheating, and for the variation in density on tempering, it is concluded that troostite is amorphous and uncrystallized a-iron which has not