公开(公告)号：US3846600A

公开(公告)日：1974-11-05

申请号：US40878773

申请日：1973-10-23

申请人： EATON CORP

发明人： KOLZE L ,  JONES W

IPC分类号： H01H35/26 ,  H01H35/34 ,  H01H1/34

CPC分类号： H01H35/2614

摘要： A simplified calibration mechanism is provided for a pressure switch using an adjustable, spring-biased plunger arrangement for controlling the trip force and hence the pressure to which the switch responds. The mechanism includes an especially configured lever pivoted at one end, contacting an especially shaped cam as a follower at its other end and the plunger at its mid portion. First calibration means are provided in the lever''s pivoted end to adjust the normal low-high pressure settings of the switch. Second calibration means are provided to isolate the lever and cam from the plunger for effecting a precise setting of the pressure switch at extra-low pressures.

摘要翻译： 为使用可调节的弹簧偏置柱塞装置的压力开关提供简化的校准机构，用于控制跳闸力，并因此控制开关响应的压力。 该机构包括在一端枢转的特别配置的杆，在其另一端处接触作为随动件的特殊形状的凸轮，并在其中部接触柱塞。 第一个校准装置设置在杠杆的枢转端，以调节开关的正常低压设置。 提供第二校准装置以将杠杆和凸轮与柱塞隔离，以便在超低压下精确地设定压力开关。

公开(公告)号：US3740741A

公开(公告)日：1973-06-19

申请号：US3740741D

申请日：1971-05-26

申请人： EATON CORP

发明人： JONES W

IPC分类号： G01G23/36 ,  G08C19/00

CPC分类号： G01G23/36

摘要： A preset amount of weight change with respect to a load cell is monitored by a circuit which provides an alarm at an adjustable point prior to the weight change reaching the predetermined amount. A load cell and a phase detector circuit are driven by an oscillator which provides a pair of different phase signals. The phase detector is further provided with an output signal from the load cell indicative of the weight carried by the load cell and at the frequency and phase of one of the signals of the oscillator. The phase detector provides a direct current signal representative of weight carried on the load cell in response to its input alternating signals and the direct current signal is utilized for determining operation of an alarm device. An adjustable and switchable set point circuit is provided for developing an operating signal for the alarm device in response to the direct current signal from the phase detector, the switching function being effective to permit the direct current signal to approach a reference signal representative of the predetermined weight change unidirectionally regardless of whether the load cell is being loaded or unloaded.

摘要翻译： 通过在重量变化达到预定量之前在可调节点处提供警报的电路来监测相对于称重传感器的预设重量变化量。 称重传感器和相位检测器电路由提供一对不同相位信号的振荡器驱动。 相位检测器还具有来自负载单元的输出信号，该输出信号指示由负载单元承载的重量，以及振荡器的一个信号的频率和相位。 相位检测器响应于其输入的交流信号提供表示承载在称重传感器上的重量的直流信号，并且直流信号用于确定报警装置的操作。 提供可调节和可切换的设定点电路，用于响应于来自相位检测器的直流信号而开发用于报警装置的操作信号，开关功能有效地允许直流信号接近代表预定的参考信号 无论负载单元是装载还是卸载，单向重量变化。