Optics: measuring and testing – By configuration comparison – With photosensitive film or plate
Patent
1978-07-31
1983-03-08
Punter, William H.
Optics: measuring and testing
By configuration comparison
With photosensitive film or plate
198628, 198813, 250223R, 356386, G01B 1128, G01B 1104, B65G 1514, B65G 2344
Patent
active
043759203
ABSTRACT:
To synchronize the belt of a conveyor, a scanner, a fluorescent lamp, and an LED display unit of an area meter, the main AC power supply of the area meter drives the conveyor belt through a synchronous motor and supplies the same frequency of power to a phase locked loop. The phase locked loop provides synchronous pulses of higher frequencies to the scanning system, fluorescent lamp and LED display unit to maintain synchronism. The resolution of the measuring system is optimized when changes are made in the size of the area that is scanned by adjusting: (1) the lens of the scanner; (2) the rate of readout of the pulses from the scanner; and (3) the decimal place of the display unit. Travel from side to side of the belt is avoided by individually adjusting the ends of the pulleys until the belt runs true and an idler which lifts both bottom and top run of the belt when an object moves under it prevents slippage of the belt with respect to the rollers and the bite of the conveyor is adjustable.
REFERENCES:
patent: 2360883 (1944-10-01), Metcalf
patent: 3484615 (1969-12-01), Noro et al.
patent: 3782833 (1974-01-01), Biggs et al.
patent: 3918573 (1975-11-01), Farney
patent: 4061914 (1977-12-01), Green
patent: 4063820 (1977-12-01), Borgese
patent: 4140216 (1979-02-01), Conrad
patent: 4152767 (1979-05-01), Laliotis
patent: 4173904 (1979-11-01), Repetto
Li--Cor, "Portable Area Meter", Brochure Ami-579 Li--Cor Inc., Box 4425, Lincoln, Nebraska 68504.
Biggs William W.
Middendorf Lyle R.
Wurm John H.
Carney Vincent L.
Li-Cor Inc.
Punter William H.
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