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Scientific American, Vol. 63, No. 24 (1890) (1890)
leaf 4
ollar is held to slide, cover- jacent to the rails, the blocks being braced and pivot- ing the space between the disk plates, as shown in the ed at one end to short shafts mounted in plates bolted sectional view, Fig. 8. A box collar is loosely mounted to one of the ties, so that when their free… … central bar, the inward movement of which forces the matically worked or release the lock CAR BLOCK. © 1890 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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