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Page 261 - ... from the center each way. The rivet holes shall be countersunk on the face of the liner and the rivets shall be driven hot and chipped off flush with the surface of the liners. These liners shall be inspected from time to time, and if found loose shall be at once re-riveted.
Page 263 - ... in diameter and shall weigh approximately 0.95 Ib. (0.43 kg.) each. In general, the number of small spheres in a charge shall not fall below 245 nor exceed 260. The collective weight of the large and small spheres shall be as nearly 300 Ib.
Page 256 - The machine used for compression tests shall be equipped with spherical bearing blocks. The breaking load shall be divided by the area in compression, and the results reported in pounds per square inch./
Page 264 - The operator shall keep an official book, in which the alternate pages are perforated for removal. The record shall be kept in duplicate, by use of a carbon paper between the first and second sheets, and when all...
Page 262 - Abrasive Charge. — (a) The abrasive charge shall consist of two sizes of cast-iron spheres. The larger size shall be three and seventy-five hundredths (3.75) inches in diameter when new and shall weigh when new approximately seven and five-tenths (7.5) pounds (3.40 kilos) each. Ten shall be used. These shall be weighed separately after each ten (10) tests...
Page 262 - These shall be weighed separately after each ten (10) tests, and if the weight of any large shot falls to seven (7) pounds (3.175 kilos) it shall be discarded and a new one substituted; provided, however, that all of the large shot shall not be discarded and substituted by new ones at any single time, and that so far as possible the large shots shall compose a graduated series in various stages of wear.
Page 262 - ... inches in diameter with bearings not less than six (6) inches in length and belt driven, and the pulley should not be less than eighteen (18) inches in diameter, and six and one-half (GŁ) inches in face. A belt of six- (6) inch double-strength leather, properly adjusted, so as to avoid unnecessary slipping, should be used. The National Paving Brick Manufacturers...
Page 263 - ... further, that all of the small spheres shall not be rejected and replaced by new ones at any one time, and that so far as possible the small spheres shall compose a graduated series in various stages of wear. At any time that any sphere is found to be broken or defective it shall at once be replaced.
Page 262 - These staves shall be bolted tightly to the heads by four (4) three-fourths (f) inch bolts, and each bolt shall be provided with lock nuts, and shall be inspected at not less frequent intervals than every fifth (5th) test and all nuts kept tight. A record shall be made after each such inspection, showing in what condition the bolts were found. The frame and driving mechanism. The barrel shall be mounted on a cast-iron frame of sufficient strength and rigidity to support same without undue vibration.