Honeywell G.m.b.h.

General Signal Corporation

Thomas A Satko

Scott L Kern

Michael D Carney

Charles R Scally

Daniel J Carr

James W Zecca

Ellyse E Smolenak

John R Adamson

Methods and apparatus for preventing the loss and/or corruption of process data stored by data collection and/or test instruments (referred to hereinafter collectively as 'recording instruments'), which may otherwise result from events such as the removal of aforementioned storage media while data transfer operations are in progress; loss of power to the recording instrument while data transfer operations are in progress; and/or the execution of internal CPU traps or other CPU reset conditions while data transfer operations are in progress. The methods and apparatus contemplated by the invention also provide for the recovery of process data which has been corrupted during a power loss or CPU reset when normal operation of a recording instrument resumes.

Methods and apparatus for protecting the integrity of process data

A multipoint, multiple function recorder which can record, display, and process up to 135 input/output data points, either analog or discrete, in various combinations. A strip chart recorder is provided for permanently recording input and output data points and, in conjunction with the chart recorder, a separate programmable dot matrix display is provided, such display being responsive to the same input/output data points and operable for displaying data in both alphanumeric and graphic form, the display being independently operable from said chart recorder, such that said input/output points are displayable at different times from the times when they are being printed on the chart recorder.

Programmable electronic display for a chart recorder

Growing community of inventors

Ivyland, PA, United States of America

Thomas A Satko