THE FLEXING SAFETY COLLAR FOR SHAFTS. THE PARTS OF THE FLEMING COLLAR DETACHED. PARTIAL SECTION OF THE COLLAR. AN EFFICIENT SINGLE-PULL CEILING-SWITCH. A FOLDING BUNK FOR CARS AND SHIPS. A FOLDABLE AND REMOVABLE BUNK. The Current Supplement. THE JONES SINGLE-PULL CEILING-SWITCH., scientific american, 01-03-16
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