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:
Oct. 12, 1976
Filed:
Jan. 24, 1975
Applicant:
Inventor:
Alan E Revell, Louisville, KY (US);
Assignee:
American Air Filter Company, Inc., Louisville, KY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
55352 ;
Abstract
A control circuit for an automatic roll-type air filter including a photocell for detecting the dust load condition of the filter media and for energizing the circuit to cause the filter media to advance in response to the dust loading, a variable resistor to provide adjustment of the set-point at which the circuit is energized, and a fixed value resistor in series with the variable resistor to prevent setting of the variable resistor to a value which would allow the circuit to be energized thereby advancing the filter media when cleaned media is present in the air filter zone of the automatic roll-type air filter.