JAMES F MORRISSEY
Broker in Norwood, MA
License number
Massachusetts 93356
Issued Date
May 1, 1976
Expiration Date
Nov 24, 1995
Type
Broker
Address
Address
Norwood, MA 02062
Professional information
Humidity Sensing Apparatus And Method
US Patent:
5365784, Nov 22, 1994
Filed:
Apr 30, 1992
Appl. No.:
7/876836
Inventors:
James F. Morrissey - Norwood MA
Assignee:
The United States of America as represented by the Secretary of the Air
Force - Washington DC
Force - Washington DC
International Classification:
G01W 111
US Classification:
7333502
Abstract:
The present invention is a humidity sensor which can be used in a radiosonde. The humidity sensor includes a heat sink attached to the radiosonde, a Peltier cooler attached to the heat sink, a carbon element with a thermistor attached therein or thereon, and a control means. The resistance of the carbon element is adjusted to a predetermined level to maintain a relative humidity of about 33, in particular. The control means monitors this resistance and adjusts the Peltier cooler accordingly. The thermistor responding to the temperature of the carbon element outputs a resistance indicative of the temperature on the sensor surface.
Humidity Sensing Apparatus And Method
US Patent:
5614671, Mar 25, 1997
Filed:
Apr 18, 1994
Appl. No.:
8/229489
Inventors:
James F. Morrissey - Norwood MA
Assignee:
The United States of America as represented by the Secretary of the Air
Force - Washington DC
Force - Washington DC
International Classification:
G01N 2704, G01W 100
US Classification:
7333505
Abstract:
The present invention is a humidity sensor which can be used in a radiosonde. The humidity sensor includes a heat sink attached to the radiosonde, a Peltier cooler attached to the heat sink, a carbon element with a thermistor attached therein or thereon, and a control means. The resistance of the carbon element is adjusted to a predetermined level to maintain a relative humidity of about 33, in particular. The control means monitors this resistance and adjusts the Peltier cooler accordingly. The thermistor responding to the temperature of the carbon element outputs a resistance indicative of the temperature on the sensor surface.