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:
May. 08, 2001
Filed:
Jun. 16, 2000
Takashi Yumura, Tokyo, JP;
Mineo Okada, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
In a method for checking and adjusting an elevator governor which includes an emergency stop switch,) for tuning off the power supply of an elevator hoist to brake it; first and second fixed conductive guide rails (,) extending vertically the entire length of an elevator hoistway; an emergency brake (,) attached to an elevator car assembly containing an elevator car and a balance weight balancing therewith, for grabbing the first fixed conductive guide rail (,) to brake the elevator car assembly by friction; a magnet assembly (,) mounted on the elevator car such that it is displaced by an eddy current induced based on the relative speed between the second fixed conductive guide rail and the magnet assembly disposed opposite thereto; and an emergency stop mechanism for actuating the emergency brake (,) upon detecting that the displacement of the magnet assembly (,) has reached displacement corresponding to a critical speed critical; a pseudo speed generator, which generates speed by straight-line motion or rotation of a conductive member of substantially the same material as that for the fixed conductive guide rails, is used in combination with the magnet assembly to make a check to see ability for normal operation of the governor in emergency situations.