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:
Feb. 10, 1981
Filed:
May. 11, 1979
Arthur Walter, Waldkirch, DE;
Erwin Sick GmbH, Optik-Elektronik, Waldkirch, DE;
Abstract
A transmitting lens and a receiving lens are arranged alongside each other on one narrow side of a shallow housing so that a pencil beam of light transmitted by the transmitting lens and reflected by a separate reflector is received by the receiving lens and concentrated onto a photoelectric converter. Interruption of the pencil beam of light results in interruption of the output signal from the photoelectric converter and is detected and used to actuate an alarm signaller located within the housing. The alarm signaller, which is preferably a buzzer, is connected with the housing to form a single constructional unit. The optics and electronics are conveniently mounted on a circuit board which is conveniently located within the housing and secured by a resilient cushion.