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:
Jan. 21, 1986
Filed:
Nov. 28, 1983
Henning N Kornbrekke, Burlington, CT (US);
David M Cirkot, Ansonia, CT (US);
Anthony R Ranaudo, Naugatuck, CT (US);
The Stanley Works, New Britain, CT (US);
Abstract
An automatic door installation with four traffic sensors mounted on the door jambs on opposite sides of the doorway opening and having radiant energy emitters and reflected energy receivers for sensing doorway traffic. Two sensors are employed to cover the exit or swing side of the doorway, a threshold sensor is employed to cover the threshold area and an entrance sensor is employed to cover the entrance side of the doorway. The entrance and two exit sensors each have a plurality of radiant energy emitters with angularly spaced beam axes to provide broad coverage areas intersecting the traffic path of travel. The emitters of the exit and threshold sensors are selectively deactivated as the door is swung between its open and closed positions to avoid sensing the door. The emitters of all four sensors are pulsed in a predetermined sequence and the sensor receivers are timely activated to receive reflected radiant energy from the respective emitter(s) only.