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    • 9. 发明授权
    • Dry bath temperature control
    • 干浴温度控制
    • US4504733A
    • 1985-03-12
    • US610447
    • 1984-05-15
    • William J. Walsh
    • William J. Walsh
    • G05D23/24H05B3/06
    • G05D23/24G05D23/1909
    • An electrically-heated dry bath wherein a metal block having receptacles for receiving test tubes or the like has resistor heaters fixed thereto and a thermistor temperature sensor therein. A control circuit is provided which connects and disconnects electrical current to and from said heaters in response to the temperature sensor. The control current is fedback such as to eliminate a factor J(S) from the overall transfer function of the circuit, J(S) being a transfer function expressing how various thermal time constants in the bath would, unless neutralized, make the effective time constant of the controlled system deviate from the ideal on-off transfer function.
    • 电加热干燥浴,其中具有用于接收试管等的容器的金属块具有固定在其上的电阻加热器和其中的热敏电阻温度传感器。 提供控制电路,其响应于温度传感器连接和断开来自所述加热器的电流。 控制电流被反馈,以消除电路的整体传递函数的因子J(S),J(S)是传递函数,表示浴中的各种热时间常数,除非中和,使得有效时间 受控系统的常数偏离理想的开 - 关传输功能。