Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1984-05-22
1985-07-23
Nelms, David C.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
104 7B, G01J 120
Patent
active
045310530
ABSTRACT:
The machine comprises a device for shifting the track which is controlled by a device for the detection of its geometrical defects.
The detection device comprises three rail feelers spaced apart from each other and to which there are connected a light-ray emitter (17), a screen (18) having two parallel delimiting edges (19, 20), and a receiver (21) having two identical photovoltaic cells (22, 23) arranged in such a manner that the sum of their irradiated surfaces (u+d) is a constant and their difference (u-d) is proportional to the displacements of the screen respectively.
The signals emitted by the two cells are processed in an electronic circuit comprising a calculation unit (30) delivering a signal for the control of the displacement device representative of the quotient (u-d)/(u+d) of the difference divided by the said sum so as to make this signal independent of variations in irradiation of the two cells.
REFERENCES:
patent: 3381626 (1968-05-01), Fagan et al.
patent: 3706284 (1972-12-01), Plasser et al.
patent: 4004852 (1977-01-01), Pentecost
patent: 4184082 (1980-01-01), Massey
patent: 4292513 (1981-09-01), Simmons et al.
patent: 4356393 (1982-10-01), Fayfield
patent: 4371946 (1983-02-01), Constantinides et al.
Research Disclosure, No. 184, Aug. 1979, Apparatus for Tracking a Record Track on a Video Disc.
Casella Anthony J.
Gatto J.
Hespos Gerald E.
Nelms David C.
Sig Societe Industrielle Suisse
LandOfFree
Railway work machine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Railway work machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Railway work machine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-635753