E - Fixed Constructions – 01 – B
Patent
E - Fixed Constructions
01
B
104/5
E01B 35/10 (2006.01) G01B 11/30 (2006.01) G01D 5/34 (2006.01) G01J 1/20 (2006.01)
Patent
CA 1203123
ABSTRACT A railway work machine has a railway track displacement tool for correcting levelling or alignment defects of the railway track, a regulating member for adjusting the displacement of the tool, and a device for detecting the geometrical defects of the track and controlling said regulating member. The detection device comprises rail feelers spaced apart from each other and to which there are connected a light- ray emitter, a screen having two parallel delimiting edges, and a receiver having two identical photovoltaic cells arranged in such a manner that the sum (u + d) of their irradiated surfaces is a constant and the difference (u - d) thereof is proportional to the amplitude of the detected defects. The signals emitted by the two cells are directed to a processing circuit comprising a totalizer outputting a signal for the control of said regulating member proportional to the said difference (u - d), and a pilot circuit for the emitter to maintain the irradiation of the two cells as a constant by comparison of a signal proportional to said sum (u + d) with a reference signal, whereby the value of the control signal is exclusively proportional to the difference of the irradiated surfaces of the two cells and may be used as an indication of the actual amplitude of the detected defects.
411486
Ridout & Maybee Llp
Sig Societe Industrielle Suisse
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