. Railway master mechanic [microform] . h any valve block or casing,and permits the hammer to be taken apart without remov-ing the handle. A very unique feature of this hammer isthe fact that the piston can be moved backwards and for-wards by simply blowing through the valve, which supports the manufacturers claim that it is very powerful and eco-nomical in the use of air. The locking device fits over a pinplaced in the cylinder, and being threaded and tapered,makes it absolutely impossible for the handle to work simplicity in construction (only 14 distinct parts, includ-ing pins, sc
. Railway master mechanic [microform] . h any valve block or casing,and permits the hammer to be taken apart without remov-ing the handle. A very unique feature of this hammer isthe fact that the piston can be moved backwards and for-wards by simply blowing through the valve, which supports the manufacturers claim that it is very powerful and eco-nomical in the use of air. The locking device fits over a pinplaced in the cylinder, and being threaded and tapered,makes it absolutely impossible for the handle to work simplicity in construction (only 14 distinct parts, includ-ing pins, screws, springs, etc.) will reduce the cost of re-pairs to a minimum. During a recent test with a No. 3 ham-mer, having 3-inch stroke, a %-inch cut 3-feet long in %-inchboiler plate was made in eight minutes. The Hayes electric drill can be used with a breast plate,screw feed or grip handle, and is suitable for drilling holesup to i/o-inch in metal and %-inch in wood. A circulatingfan is mounted on the armature shaft, which forces a con-. Green Pneumatic Hammer. stant current of air through the motor casing, preventingover-heating of the motor. This machine is adapted to drill-ing in metal, marble, wood, etc., and will be found very de-sirable by shops having this class of work to perforin, butwhose requirements do not demand a complete pneumatictool equipment, as it can be operated by attaching to any elec-tric light socket of 110 or 220 volts direct current. Complete information regarding these tools can be securedby writing the Chicago Tool & Supply Company, 1532 Monad-nock Building, Chicago. The McGuire-Cummings Grain Door The accompanying line drawings illustrate a design ofgrain door which is cheap, simple and durable, embodyingup-to-date improvements which make it practical and eco-nomical. An expensive part of the cost of the maintenanceof grain doors has been overcome by the clinch method ofv fastening the rods to the door posts, by means of whichthe rods are held secure
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Keywords: ., bookcentury1800, bookdecade1890, bookidrailwaymaste, bookyear1895
