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. 19, 1992
Filed:
Sep. 30, 1988
Applicant:
Inventors:
Kenjiro Fujii, Funabashi, JP;
Masao Oura, Yachiyo, JP;
Kazuyuki Tuburaya, Akikawa, JP;
Shigehisa Hagura, Tokyo, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05B / ;
U.S. Cl.
CPC ...
31856813 ; 31856811 ; 31856812 ; 901-3 ; 200 / ; 200 / ; 364191 ;
Abstract
A portable teaching apparatus comprises interlock cancellation switches and at least one operating switch for producing a signal which remains effective only when the interlock cancellation switch is depressed. A box-like body with the operating switch arranged on the front surface thereof include two parallel strips of apexes on the back side thereof. Slopes which steadily approach the front side and continued from the apexes are formed between the two strips of apexes. The operating buttons of the interlock cancellation switches are mounted on the slopes respectively.