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:
Jul. 06, 1982
Filed:
Apr. 22, 1980
Masashi Yonemoto, Inazawa, JP;
Eiki Watanabe, Inazawa, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
An elevator relevelling control apparatus for controlling the movement of an elevator car (11) such that when the car is misaligned with the landing position of a selected landing floor, the car is restarted and brought into alignment. A traction motor (M) is controlled by a landing means (1) which generates a speed command signal (1a) of a magnitude which increases linearly with the extent of misalignment. First and second position detecting devices (15, 16, 17, 18) are provided in the hoistway to detect misalignment from the landing position by a first or second predetermined distance, respectively. The car is provided with load detecting means (12) for detecting whether or not the car is overloaded. If the load detecting means (12) detects that the car is not overloaded, and a switching device (15, 16) detects that the car is misaligned by a first predetermined distance, a speed command signal (1a) of suitable magnitude is supplied to the traction motor (M), thereby effecting relevelling. If, on the other hand, the car is detected to be in an overloaded state, and a switching device (17, 18) detects that the car is misaligned by a second, greater, predetermined distance, a speed command signal of larger magnitude is supplied to the traction motor (M), whereby the relevelling operation can be commenced with a torque greater than that applied when the car is not overloaded.