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:
Dec. 08, 1987
Filed:
Sep. 03, 1986
Eiki Watanabe, Inazawa City, JP;
Abstract
An elevator such as an escalator having a display device presenting, whenever necessary, a display of matters to be noted upon a predetermined special operation (for example, when conveying a wheelchair) while making the display disappear during normal operation of the escalator so as to avoid unsightly appearance. This is also effective in preventing the inadvertent overlooking of the matters displayed. The display device comprises a liquid crystal layer; a pair of electrodes disposed on opposite sides of the liquid crystal layer, one of the electrodes being a transparent pattern electrode having a pattern corresponding to the display of the matters that should be taken note of, the other electrode being a transparent common electrode; and an electric power source for supplying electricity to the electrodes. A switch is operable to shift the escalator between the operation modes and is connected between the electric power source and the electrodes to normally interrupt the electric power supply to the electrodes so that the liquid crystal layer does not display any matters to be noted and also to supply electric power to the electrodes whenever necessary so that the liquid crystal layer displays matters to be noted.