The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 30, 1991
Filed:
Apr. 04, 1990
Applicant:
Inventor:
Edward McDonald, Lyndon Station, WI (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B65G / ;
U.S. Cl.
CPC ...
414289 ; 414318 ; 414320 ; 222 48 ; 1985021 ; 1985024 ;
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.