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Larry McdavidMoreno Valley, CA
Larry Mcdavid Phones & Addresses
Moreno Valley, CA
Los Angeles, CA
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Us Patents
Temperature Control System For Cutaneous Gas Monitor
US Patent:
4805122, Feb 14, 1989
Filed:
Jan 25, 1988
Appl. No.:
7/148115
Inventors:
Larry S. McDavid - Anaheim CA
Michael Pawlowski - Chino CA
Stuart L. Foster - Fountain Valley CA
Gerald T. Stillman - Fullerton CA
Michael Pawlowski - Chino CA
Stuart L. Foster - Fountain Valley CA
Gerald T. Stillman - Fullerton CA
Assignee:
Sensormedics Corporation - Anaheim CA
International Classification:
G06F 1542
G01N 2726
A61B 505
G01N 2726
A61B 505
US Classification:
364557
Abstract:
A temperature control system for an electrically heated cutaneous gas sensor. A heating element is provided with heating current by a closed loop temperature control circuit. The system includes a plurality of temperature monitoring circuits which are arranged to turn off the flow of heating current if the temperature of the sensor takes on an unacceptable value. The system also includes temperature setting circuitry for applying an increased temperature setpoint signal to the temperature control circuit, for a predetermined time, to reduce the time delay between the application of the sensor to the patient and the production of usable sensor data. Timing circuitry assures that the flow of heating current is not turned off in response to normal sensor temperature transients.
Temperature Control System For Cutaneous Gas Monitor
US Patent:
4586149, Apr 29, 1986
Filed:
Jul 5, 1983
Appl. No.:
6/510150
Inventors:
Gerald T. Stillman - Fullerton CA
Michael Pawlowski - Chino CA
Larry S. McDavid - Anaheim CA
Michael Pawlowski - Chino CA
Larry S. McDavid - Anaheim CA
Assignee:
Sensormedics Corporation - Anaheim CA
International Classification:
G01K 1500
US Classification:
364557
Abstract:
A temperature control system for an electrically heated cutaneous gas sensor. A heating element is provided with heating current by a closed loop temperature control system. The system includes a plurality of temperature monitoring and control circuits which are arranged to turn off a switch that controls the flow of current through the heating element if the temperature of the sensor varies outside of acceptable limits. The system also includes latching circuitry for maintaining the off state of the switch after the occurrence of an out of limits condition, and circuitry for preventing the latching circuitry from being actuated during normal temperature transients.
Apparatus For Deplating Cutaneous Gas Sensors
US Patent:
4705617, Nov 10, 1987
Filed:
May 6, 1983
Appl. No.:
6/492108
Inventors:
Cedric H. Beebe - Fullerton CA
Larry S. McDavid - Anaheim CA
Michael Pawlowski - Chino CA
Larry S. McDavid - Anaheim CA
Michael Pawlowski - Chino CA
Assignee:
Sensormedics Corporation - Anaheim CA
International Classification:
G01N 2746
G12B 1300
G12B 1300
US Classification:
204402
Abstract:
An improved method and apparatus for deplating the electrodes of cutaneous oxygen sensors. A controllable voltage source selectably establishes either a polarizing voltage or a deplating voltage between the electrodes of a cutaneous oxygen sensor, while a current sensing circuit measures the current flow therebetween. If, during the calibration of the sensor, the current flow exceeds a predetermined threshold, the apparatus initiates an operator assisted sequence of operations which deplate the electrodes and restore the gas sensor to a usable operating condition. During the performance of this sequence of operations, the apparatus carries out all steps, except those which must be performed manually by an operator.
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