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:
Mar. 19, 1991
Filed:
Apr. 30, 1990
Vernon H Siegel, Clarence, NY (US);
Other;
Abstract
A plurality of electrostatic field proximity sensors are mounted upon a crane boom. The sensors are capacitive elements and include an antenna. The sensors are electrically connected in parallel with a single wire. A summing amplifier is coupled to the sensors for detecting changes in flux fields, which changes could signal a dangerous condition. The sensors can comprise an electrically insulating body having first and second ends with a conductive member attached to one of the ends. A mounting means is provided at the other one of the ends. A resistor can be electrically connected between the ends to discharge excess static charge and to allow detection of missing sensors.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile