DALE ALAN ZESKIND
Pilots at Hickory Hl Rd, Wayland, MA

6339373, Jan 15, 2002

Apr 13, 1999

09/290298

Dale A. Zeskind - Wayland MA 01778
Dennis Lonigro - Norwood MA 02062
Donald Smith - Northboro MA 01532

G08B 108

340534, 340506, 34082506, 34082516, 34082536, 34082549

A sensor device is provided for sensing a selected parameter such as pressure or temperature at a selected site, which is typically a remote site, and for generating outputs, normally to a control site, which outputs are either selected steady state or non-steady state outputs, the non-steady state outputs being indicative of the parameter being within a normal or acceptable range and/or the parameter being within an unacceptable or alarm range. The steady state outputs can be indicative either of the parameter being within a normal range or of a device failure. A particular steady state output, for example a null output, may be indicative of all failure conditions or different steady state outputs may be utilized to indicate different failure conditions.

6522249, Feb 18, 2003

Aug 30, 2001

09/943112

Dennis A. Lonigro - Needham MA
David J. Wilbur - Braintree MA
Dale A. Zeskind - Wayland MA

United Electric Controls, Co. - Watertown MA

G08B 108

340533, 340531, 340538, 34031001, 34031006

An interface that provides selected information from a remote device to a utilization mechanism over a two-wire connection, wherein all power for the interface and the remote device is received from the utilization mechanism over the same two-wire connection. A switch circuit provides a high impedance between first and second wires of the two-wire connection when open and a low impedance between the wires when closed. Current flow through the switch circuit is sensed by the utilization mechanism as indicative of information from the remote device. The interface comprises a voltage regulator that provides a regulated voltage to components of the interface and the remote device, and a current regulator that regulates current provided to the voltage regulator from the two-wire connection, when the switch circuit is open, to below a predetermined level at which the utilization mechanism interprets the switch circuit as being in the open state.

6920400, Jul 19, 2005

Dec 20, 2001

10/027361

Dennis A. Lonigro - Needham MA, US
David J. Wilbur - Braintree MA, US
Dale A. Zeskind - Wayland MA, US

United Electric Controls Co. - Watertown MA

G01F001/00

702 45, 73 102, 73 157, 73 159, 73 134

A method and apparatus for detecting and clearing a plugged sensor port in a system containing a fluid being monitored through the sensor port. The method comprises establishing a range beyond which a fluid variable is expected to vary within a predetermined time interval, measuring the fluid variable, and indicating a plugged sensor port in response to the measured fluid variable remaining within the range for the predetermined time interval. The apparatus includes a sensor mechanism that senses a fluid variable, and a controller. The controller establishes the range beyond which the fluid variable is expected to vary within a predetermined time interval, determines whether the fluid variable is within the range, and indicates a plugged sensor port in response to the fluid variable remaining within the range for the predetermined time interval. The apparatus may further include a mechanism that clears the plugged sensor port.