Thermal energy proximity detector

Details Thermal energy proximity detector Thermal energy proximity detector

1985-06-03

1987-09-01

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250342, 102213, G01J 128

Patent

active

046911057

ABSTRACT:
A proximity sensor comprising a thermal detector responding to the rate of change of a thermal input and connected to circuitry for performing a control function when the detector output becomes zero, which occurs when a target being approached by the detector fills the field of view of the detector.

REFERENCES:
patent: 3036219 (1962-05-01), Thompson
patent: 3455243 (1969-07-01), Martin
patent: 3727553 (1973-04-01), Godfrey
patent: 4209699 (1980-06-01), Pusch
patent: 4227077 (1980-10-01), Hopson et al.
patent: 4257703 (1981-03-01), Goodrich
patent: 4470151 (1984-09-01), Billingsley et al.
patent: 4593406 (1986-06-01), Stone

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