David C Gee

US Patent:

46582452, Apr 14, 1987

Filed:

Apr 29, 1983

Appl. No.:

6/490010

Inventors:

Denver R. Dye - Hiram OH
David J. Gee - Twinsburg OH
Richard L. Patterson - South Euclid OH
Stephen M. Zielaskiewicz - Garfield Hts. OH

Assignee:

The Warner & Swasey Company - Cleveland OH

International Classification:

G08B 2105

US Classification:

340683

Abstract:

An apparatus and method for tool condition and failure monitoring system for predicting imminent tool failure by sensing acoustic emissions from a cutting operation converting the emissions into an electrical signal filtering the electrical signal and using a "count rate" technique on the filtered signal to generate a signal indicative of imminent failure. To improve the prediction, the filtering includes removal of low frequency and d. c. signals and the imminent failure is indicated only after several successive periods of a triggering level of count rate.

US Patent:

55530958, Sep 3, 1996

Filed:

Apr 28, 1993

Appl. No.:

8/054582

Inventors:

Jonathan R. Engdahl - Chardon OH
David J. Gee - Ann Arbor MI
Mark A. Lucak - Hudson OH
Shawn L. Adams - Rocky River OH

Assignee:

Allen-Bradley Company, Inc. - Milwaukee WI

International Classification:

H04B 138
H04J 302

US Classification:

375222

Abstract:

A digital communication network carries high and low priority data. The network stations that produce high priority data are assigned to a first group of stations and stations that produce low priority data are assigned to a second group with the two group not being mutually exclusive. Activity on the network is divided into periodic intervals of the same duration. Network control information, that defines how access to the medium, is determined is broadcast to all stations during a first segment of a periodic interval. The network control information defines the length of the periodic interval and of the periodic interval segments, and defines how many stations are in each group. Then during a second segment of the periodic interval, every station in the first group is afforded an opportunity, in a predefined order, to transmit high priority data over the medium. Stations in the second group are afforded an opportunity to transmit low priority data, when time remains after the first segment in a periodic interval before the network control information will be transmitted again. The specific station in the second group which is afforded an opportuinity to transmit first changes from periodic interval to periodic interval.