| 摘要 |
<p>An electric thermometer specially useful for the blind and weak-sighted is provided with an electric supply unit and comprises a measuring probe (1) which provides an electric signal proportional to the measured temperature and which may be wire-connected (9) to a dynamometric electric box (A). The dynamometric box is provided with an amplifier (2) and with a voltage divider (4) of which the potential meter comprises a raised relief reading scale. The dynamometric box is also provided with a comparator (3) arranged between the amplifier and the voltage divider, with a voltage controlled sound frequency oscillator (5) connected to the comparator, and with a loudspeaker (6).</p> |
