Material or article handling – Static receptacle and means for charging or discharging – or... – With alarm – indicator – or signal
Patent
1990-04-04
1991-04-30
Spar, Robert J.
Material or article handling
Static receptacle and means for charging or discharging, or...
With alarm, indicator, or signal
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.
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Heiser, "Applying Limit Switches for Automatic Control", from Automation magazine, Mar. 1966, pp. 89 & 90.
Katz Robert S.
Kearns Jerry T.
Spar Robert J.
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