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. 20, 1980
Filed:
Jul. 07, 1978
Applicant:
Inventor:
Christian Thenon, Chatillon-sur-Cluses, FR;
Assignee:
De Visu International, Igny Zai, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G09B / ;
U.S. Cl.
CPC ...
35 76 ; 40519 ; 40522 ;
Abstract
A rollable chart having a web of flexible material wound about two rollers. An endless band extends around pulleys adjacent each roller for manual manipulation. Two unidirectional driving devices are provided each including an internally toothed surface, a disk axially adjacent the toothed surface formed with an inclined cam groove with which a pin on a sliding pawl cooperates.