Chicago : Engineering and Contracting Pub. Co. · leaf 586
ofSpring Latch. the outward thrust of the piston of an air-brake cylinder. The mechanism is fixed uponthe boom of the shovel. A drum is mountedupon the face of the thrusting gear, or ship-per shaft, which revolves with the shaft, thuswinding or unwinding the tripper rope, ac-cording as the dipper…
Buildings
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
