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Donald L Richer Deceased231 Elm St, Marlboro, MA 01752

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Barbara T Richer 79 Laurie J Richard 38

Donald Richer Phones & Addresses

231 Elm St, Marlborough, MA 01752 (508) 485-3187

Haverhill, MA

231 Elm St, Marlborough, MA 01752 (508) 509-7012

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Position: Machine Operators, Assemblers, and Inspectors Occupations

Education

Degree: Bachelor's degree or higher

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Donald L Richer

Address:
Marlboro, MA 01752
Licenses:
License #: 11390 - Expired
Expiration Date: May 1, 2006
Type: Journeyman Plumber

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Donald Richer

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Us Patents

Process Control System With Improved System Security Features

US Patent:
4351023, Sep 21, 1982
Filed:
Apr 11, 1980
Appl. No.:
6/139495
Inventors:
Donald K. Richer - Mansfield MA
Assignee:
The Foxboro Company - Foxboro MA
International Classification:
G06F 1546
G06F 1116
US Classification:
364187
Abstract:
A process control system includes two digital controllers each capable of exercising direct digital control over the process. One of the controllers is selected to be on-control, the other serving as a backup. A separate data buffer memory connected to both controllers stores the most recent static and dynamic data base of the on-control controller which is transferred to the backup controller. In the event of failure or other loss of service, the backup automatically acquires control with an up-to-date data base resulting in a smooth transition. Provisions are also included to have the backup controller examine the health of the on-control unit before deciding whether or not to accept the data buffer contents thereby reducing the likelihood of corrupted data being fed to the backup.

Possible Relatives

Danielle M Richer  Diane M Richer  Doug A Richer  Elizabeth L Richer  Ethel K Richer  Gary A Richer  Gerald A Richer  Donald R Johnson  Donald Stamps  Donald L Stanchfield 

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