| 摘要 |
<p>A temperature controller for controlling an electrical heater of a bed, comprising first temperature sensing means to indicate the temperature of said bed, second temperature sensing means to indicate the temperature of the environment ambient to said bed, and means for switching said heater to regulate the heating of said bed thereby, arranged to actuate said heater to maintain said bed at a predetermined set bed temperature and to vary same to compensate for variations in the temperature of said enviroment ambient to said bed.</p> |
