Electric resistance heating devices – Heating devices – Convection space heater
Patent
1990-12-24
1993-03-23
Bartis, Anthony
Electric resistance heating devices
Heating devices
Convection space heater
165103, 165122, 219505, 251251, 251253, 392363, 392368, 392379, 392383, H05B 314, F24H 304, F28F 2702, H01C 702
Patent
active
051971127
ABSTRACT:
An electric forced air heating device using PTC elements for heating and having a fixed volume of airflow established by a blower driven at a constant rate. A pair of parallel air paths are established in the device, with one air path having the PTC elements fixedly located therein. A laterally movable damper is used to control airflow through the two air paths, and is positioned proximate the PTC elements a fixed distance therefrom so that as the damper is shifted, airflow proportionally increases through one of the air paths and proportionally decreases through the other air path to control the heat output of the PTC elements. The energization of the PTC elements and blower is controlled by a switch activated by movement of the damper.
REFERENCES:
patent: 1889588 (1932-11-01), Anderson
patent: 2914648 (1959-11-01), Allander
patent: 3252509 (1966-05-01), Keegan
patent: 3394755 (1968-07-01), Morrison
patent: 4218608 (1980-08-01), Maroney
patent: 4316077 (1982-02-01), Carlson
patent: 4459466 (1984-07-01), Nakagawa et al.
patent: 5057672 (1991-10-01), Bohlender et al.
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