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. 17, 1987
Filed:
Dec. 10, 1984
Dean L Dahnert, Fort Atkinson, WI (US);
Spacesaver Corporation, Fort Atkinson, WI (US);
Abstract
A control system for vertical storage equipment requires only two sensing devices, in combination with a microprocessor controller, for positioning a selected article carrier at a specified work station. One sensor senses a reference mark having a direct speed and position relation with the carriers. The second sensor senses at least one reference mark mounted to a high speed member in the drive mechanism used to move the carriers. By sensing the high speed member, the resolution of the control system is greatly increased, thereby providing the control system with increased accuracy and versatility. A flywheel having a relative inertia greater than the total of the remaining moving parts is preferably employed to negate the influence of carrier loading conditions on control system smoothness and accuracy.