Chart recorder with thermal print head and sound generator

Details Chart recorder with thermal print head and sound generator Chart recorder with thermal print head and sound generator

1990-03-29

1992-03-31

Fuller, Benjamin R.

Recorders

Combined with non-recording indicator or alarm

346 76PH, 340384E, G01D 900

Patent

active

051012200

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.

REFERENCES:
patent: 3277245 (1966-10-01), Sponga
patent: 3571786 (1971-03-01), Saling
patent: 3971041 (1976-07-01), Mason
patent: 4085407 (1978-04-01), Stratbucker et al.
patent: 4214590 (1980-07-01), Patnoi et al.
patent: 4215351 (1980-07-01), Lowe
patent: 4576178 (1986-03-01), Johnson

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