A REGISTER AND RECORDER FOR REVOLVING SHAFTS. AN IMPROVED MECHANICAL MOVEMENT. AN IMPROVED SAFETY INDICATOR FOR ELEVATORS. LYNN'S SAFETY INDICATOR FOR ELEVATORS. AN IMPROVED LIFTING TRUSS GIRDER. THE TERRY SPEED REGISTER AND RECORDER. HAYTON'S MECHANICAL MOVEMENT. MIN. DIAGRAM OF RECORD MADE BY THE TERRY SPEED REGISTER AND RECORDER. MON. TUE WED THU FRI SAT. SUN. MON. OLSEN'S LIFTING TRUSS GIRDER., scientific american, 1890-09-20
A REGISTER AND RECORDER FOR REVOLVING SHAFTS. AN IMPROVED MECHANICAL MOVEMENT. AN IMPROVED SAFETY INDICATOR FOR ELEVATORS. LYNN'S SAFETY INDICATOR FOR ELEVATORS. AN IMPROVED LIFTING TRUSS GIRDER. THE TERRY SPEED REGISTER AND RECORDER. HAYTON'S MECHANICAL MOVEMENT. MIN. DIAGRAM OF RECORD MADE BY THE TERRY SPEED REGISTER AND RECORDER. MON. TUE WED THU FRI SAT. SUN. MON. OLSEN'S LIFTING TRUSS GIRDER., scientific american, 1890-09-20
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