Paul M Piekarski

US Patent:

52105300, May 11, 1993

Filed:

Jan 4, 1991

Appl. No.:

7/638297

Inventors:

Gerald A. Kammerer - Wrentham MA
Paul M. Piekarski - Cranston RI
Robert W. Coia - North Attleboro MA

Assignee:

Codex Corporation - Mansfield MA

International Classification:

H04Q 500

US Classification:

34082508

Abstract:

Apparatus for interfacing a network manager to a network of communication devices over a single communications channel of a plurality of signals is disclosed. Each communication device of the network is uniquely assigned a poll address for communication selection by the network manager which is operative to establish communication with a communication device of the network by transmitting the poll address thereof over the single communication channel. The network of communication devices are coupleable together in a daisy chain through input and output port circuits thereof to form the single communications channel. The input port circuit of each communications device receives and transmits signals from and to the single communications channel upstream of its position in the daisy chain and the output port circuit of each receives and transmits signals from and to the single communications channel downstream of its position in the daisy chain. In addition, the input port circuit of the communication device in the first position of the daisy chain is coupleable to the network manager for receiving signals, including the poll address, therefrom and for transmitting signals thereto. Each communication device further includes a control circuit which is coupleable to both the input and output port circuits thereof for governing the receiving and transmitting operations of each based on the poll address transmitted over the single communications channel by the network manager.

US Patent:

20150009600, Jan 8, 2015

Filed:

Jun 24, 2014

Appl. No.:

14/312727

Inventors:

Victor V. Aromin - West Warwick RI, US
Paul M. Piekarski - Foster RI, US

International Classification:

H02H 5/04
G01K 7/24
H01B 9/02

US Classification:

361106, 374185

Abstract:

A power cord apparatus for remotely detecting excessive operational parameters in an alternating current (AC) powered machine (e.g., dehumidifiers, air conditioners, refrigerators, and Computer Numerically Controlled (CNC) machines) is provided. The power cord apparatus includes a cooperative remote parametric sensing device (e.g., heat sensing, vibration transducer) in the vicinity of the electrically powered machine.