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    Temperature compensating system
    8.
    发明授权
    Temperature compensating system 失效
    温度补偿系统

    公开(公告)号：US3338680A

    公开(公告)日：1967-08-29

    申请号：US26962063

    申请日：1963-04-01

    Applicant: BAUSCH & LOMB

    Inventor： MARTENS ALEXANDER E

    IPC: G05D23/19 ,  G05D23/24 ,  H01H43/30

    CPC classification number: H01H43/308 ,  G05D23/1906 ,  G05D23/1928 ,  G05D23/1951 ,  G05D23/24

    Abstract: 1,015,239. Electric correspondence control systems. BAUSCH & LOMB Inc. March 26, 1964 [April 1, 1963], No. 13058/64. Heading G1N Minor variations in temperature inside a temperature controlled chemical reaction chamber are sensed by a thermistor and used for automatic modification of the reaction time. As shown (Fig. 1), the temperature inside a reaction chamber 1 is controlled by a closed loop system comprising a heater 3 and thermostat 4. A sample 7 to be subjected to the conditions inside the chamber is carried into and out of the chamber as a conveyer belt 5 driven by a motor 6 which is energized for this purpose for two short periods via contacts 26, 27, 28, determined by cams 22, 23 driven by a synchronous motor 20 energized by an oscillator 18 whose frequency is determined by the actual temperature inside the chamber, as sensed by a thermistor 9. The latter is connected in a resistance bridge 10 whose amplified unbalance voltage determines the frequency of oscillator 18. Thus the time sample 7 stays inside the reaction chamber 3 is inversely proportional to the temperature in the chamber. The reaction changes in the sample may be sensed by measuring its opacity, using a lamp and photocell (not shown).

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