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:
Oct. 31, 1978
Filed:
Oct. 06, 1977
Applicant:
Inventors:
Ralph E Allen, Greene, NY (US);
Christian D Gibson, Greene, NY (US);
Assignee:
The Raymond Corporation, Greene, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B65G / ; G05D / ;
U.S. Cl.
CPC ...
214 / ; 340 21 ;
Abstract
Elevations of a lift truck load carrier relative to shelves of a storage rack are accurately indicated by photosensor means on the load carrier operated by light reflected from reflectors on the storage rack. Raising and lowering the load carrier rotates the shaft of a retractable cable reel. Photosensor signals operate a clutch which connects the reel shaft to rotate a potentiometer over a limited range of heights surrounding the desired load carrier heights for each shelf in a vertical stack of shelves.