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Scientific American, Vol. 32, No. 22 (1875) (1875)

leaf 7

An illustration from Scientific American, Vol. 32, No. 22 (1875), 1875, leaf 7
t size to bear against several of the ing or sideways pressure. SMITH’S BLIND SLAT HOLDER. The feed is actuated by an arm, C, which projects under After a blind has been exposed to the weather for some the inner ring of the bearing, and which merely pushes the little time, it is very rarely… … the block in which the shaft runs;so that when placed onan angle, there is no tendency to cross the thread of the screw. The irregular motion, which is inseparable from a machine friction rollers arranged within the disk. This distributes which makes a taper hole, occurs, it is stated, only at the…

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