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. 04, 1983
Filed:
Jan. 30, 1981
Applicant:
Inventor:
Howard L Beckerman, Middletown, NJ (US);
Assignee:
Automatic Doorman, Inc., Paterson, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318264 ; 318265 ; 318466 ; 318469 ;
Abstract
An automatic door operator system is provided with a first potentiometer having its wiper arm coupled to a pivoting member whose angular position varies in accordance with the magnitude and direction of an obstructive load applied to the door. A second potentiometer is provided having its wiper arm coupled to a movable member whose position corresponds to the position of the door. The potentiometers are connected as voltage dividers and the voltages provided at their wiper arms are utilized for controlling the movement of the door.