The book Cast Iron a Record of Original Research was written by author W J William John Keep Here you can read free online of Cast Iron a Record of Original Research book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Cast Iron a Record of Original Research a good or bad book?
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Long. The weight of the hammer can be varied be- tween 25 and 100 Ibs. With a swinging hammer the bar receives the impulse in a horizontal direc- tion and the bar bends until the motion of the hammer is stopped. The bar then springs back and throws the hammer away, ^ when it is caught by the hand and clasped -L to the trip for the drop from the next higher point. The dead load of the hammer is carried by the vertical arm to which it is attached. Impact Diagrams made with a Swinging Hammer. To o...btain a complete record of each motion of the center of the test-bar, a shaft J in. In diameter was made to revolve 1250 revolutions per minute. The paper-holder was connected to this shaft by a cord. Just as the blow was given the shaft was caused to revolve, and the winding of the cord caused the paper to move its whole 24-ins. Length in half a second. The length of the diagram of a single impulse, and of the vibrations until the bar comes to rest, is from I to 4 ins. , and the pencil makes this record in from T ^ to T V of a second.
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