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    • 31. 发明授权
    • Method and apparatus for preventing thermal damage of workpieces due to
heat developed by a grinding process
    • 用于防止由研磨过程开发的热量导致的工件热损伤的方法和装置
    • US5174068A
    • 1992-12-29
    • US734959
    • 1991-07-24
    • Werner Pickert
    • Werner Pickert
    • B24B49/14G01B7/00G01B7/16G05D23/275
    • B24B49/14G01B7/16G05D23/27543
    • The present invention discloses a method and a device for preventing thermal damage of workpieces due to heat developed by a grinding process. According to the method the temperature increase at the surface being ground is determined and the resulting actual value is compared to a reference value which has been established under the same grinding parameters with a grinding disk that caused thermic damage to the reference workpiece. During manufacture, the grinding process with the respective grinding disk is interrupted as soon as a temperature increase has been detected that corresponds to the respective temperature causing thermic damage. The reference value is determined such that it includes a certain safety margin. The determination of the actual value and the reference value may be accomplished by using geometric deformations of the workpiece that result from the temperature increase due to the grinding process. The device is characterized by special measuring devices for measuring the geometric deformations of the workpieces.
    • 本发明公开了一种用于防止由于研磨过程而产生的热而引起的工件热损伤的方法和装置。 根据该方法,确定被研磨表面处的温度升高,并将所得到的实际值与在相同研磨参数下建立的参考值进行比较,所述参考值与研磨盘对参考工件造成热损伤。 在制造过程中,一旦检测到对应于导致热损伤的相应温度的温度升高,则相应研磨盘的磨削过程就被中断。 确定参考值,使其包括一定的安全余量。 实际值和参考值的确定可以通过使用由于研磨过程引起的温度升高而产生的工件的几何变形来实现。 该装置的特征在于用于测量工件的几何变形的特殊测量装置。
    • 33. 发明授权
    • Method and apparatus for limiting the evaporation rate of liquids heated
by cooking appliance surface units
    • 用于限制由烹饪器具表面单元加热的液体的蒸发速率的方法和装置
    • US4481409A
    • 1984-11-06
    • US438770
    • 1982-11-03
    • Peter H. Smith
    • Peter H. Smith
    • G05D23/275H05B1/02
    • H05B1/0269G05D23/27543
    • Method and apparatus for detecting the boiling point of liquids being heated by a cooking appliance and automatically reducing the output power of the heat source, once the boiling point has been reached, to a level which will sustain a desired evaporation rate, by measuring the initial weight of the liquid to be heated; energizing the heat source at a predetermined power level, periodically measuring the weight of the liquid as the heating process continues; computing the rate of change of the weight of the liquid, and reducing the power level of the heat source to a lower power level when the computed rate of change exceeds a reference rate and increasing the power level when the computed rate of change is less than the reference rate once the boiling point has been reached. The first occurrence of a measured weight decrease greater than the reference rate signifies that the boiling point of the liquid has been reached.
    • 用于检测由烹饪器具加热的液体的沸点的方法和装置,并且一旦达到沸点,并自动将热源的输出功率降低到将维持所需蒸发速率的水平,通过测量初始 要加热的液体的重量; 以预定的功率水平对热源通电,当加热过程继续时周期性地测量液体的重量; 计算液体重量的变化率,并且当计算出的变化率超过参考速率时,将热源的功率水平降低到更低的功率水平,并且当计算出的变化率小于 参考率一旦达到沸点。 大于参考速率的测量重量减少的第一次出现表示已达到液体的沸点。