Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Electric eye alines movable bridge span
Means of accurately aligning moving span of bridge by means of photoelectric cell, devised by G. T. JOHNSON; bridge to which application has been made is 4-track structure with swinging span which can be operated through arc of 180 deg, 90 deg on each side of tracks; spans Norwalk river at South Norwalk, Conn. (See also Ry Age v 93 n 15 Oct 8 1932 p 503)
Electric eye alines movable bridge span
Means of accurately aligning moving span of bridge by means of photoelectric cell, devised by G. T. JOHNSON; bridge to which application has been made is 4-track structure with swinging span which can be operated through arc of 180 deg, 90 deg on each side of tracks; spans Norwalk river at South Norwalk, Conn. (See also Ry Age v 93 n 15 Oct 8 1932 p 503)
Electric eye alines movable bridge span
Ry Elec Engr
1932
2 pages
Aufsatz (Zeitschrift)
Englisch
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Electric eye alines movable bridge span
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