Silo rotary unloader monitor

Material or article handling – Static receptacle and means for charging or discharging – or... – With alarm – indicator – or signal

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Details

414318, 414320, 222 48, 1985021, 1985024, B65G 6538

Patent

active

050113593

ABSTRACT:
A silo rotary unloader monitor provides an indication of a rotational speed of the rotary collector ring of a material unloading device suspended within the top portion of a vertical silo. A limit switch has an actuating sensor biased into engagement with a sinusoidal cylindrical surface formed on a wheel mounted for rotation with the rotary collector ring. An electric circuit connected to the limit switch causes a remotely mounted electric signalling lamp or buzzer to flash or sound at a rate proportional to the rotary speed of the collector ring.

REFERENCES:
patent: 2963327 (1960-12-01), Seymour et al.
patent: 3217907 (1965-11-01), Buschbom
patent: 3319809 (1967-05-01), Prentice
patent: 3773220 (1973-11-01), Morgan et al.
patent: 3912090 (1975-10-01), Pondell
patent: 4047434 (1977-09-01), Marsh et al.
patent: 4134486 (1979-01-01), Grone
patent: 4161120 (1979-07-01), Cloarec
patent: 4227836 (1980-10-01), Sizelove et al.
patent: 4289437 (1981-09-01), Hansen
patent: 4487310 (1984-12-01), Sansoucy
patent: 4506339 (1985-03-01), Kuhnlein
patent: 4602499 (1986-07-01), Norton et al.
patent: 4667156 (1987-05-01), Machino et al.
patent: 4811603 (1989-03-01), Bitetti
Heiser, "Applying Limit Switches for Automatic Control", from Automation magazine, Mar. 1966, pp. 89 & 90.

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