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. 31, 1992
Filed:
Mar. 29, 1990
Applicant:
Inventor:
Michael J Sullivan, Portsmouth, RI (US);
Assignee:
Astro-Med, Inc., West Warwick, RI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01D / ;
U.S. Cl.
CPC ...
346 17 ; 346 / ; 3403 / ;
Abstract
A thermal chart recorder which is operative for simultaneously generating a plurality of wave form images on a thermally responsive chart in response to input signals utilizing a stationary thermal print head, includes a sound generation circuit for generating audible sounds which simulate the sounds generated by the styli of a traditional stylus-type recorder. The volume levels of the sound produced by the sound generation circuit correspond to the sum of the approximate absolute values of the rates of change of the input signals and can be utilized for allerting operators to rapid changes in recorded parameters.