ned by the for removing the detritus, 20 for taking up the screened springs, which were connected by chains with the frame more or less earthy nature of the gravel. Its velocity ballast and putting it into the oars, 4 laborers for un- of the excavator, and which, in case of resistance, per- was 30… … EXCAVATOR WITH ROTARY SCREEN. (Scale 1-60) Fig. 3.-0ENERAL VIEW OF AN EXCAVATOR AND ELEVATOR AT WORK IN A BALLAST aUARRY. hammers alternately struck the sieve bars, and thus and 10 horses. This would have entailed a daily ex- breakages that inevitably occur when the bucket of prevented the sieve…
Patented · Patents · Munn · Academy · Scientific American · Short time · National academy · Horse power · Storage battery · Cubic feet · Express money · Hot air · Address munn · Electrical horse
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