公开(公告)号：US4338546A

公开(公告)日：1982-07-06

申请号：US210235

申请日：1980-11-25

申请人： Gordon F. Ehret ,  William N. Rowley ,  Richard E. Mullen

发明人： Gordon F. Ehret ,  William N. Rowley ,  Richard E. Mullen

IPC分类号： G01F23/24 ,  H02H5/08 ,  H03K17/725 ,  H03K17/94 ,  H05B37/00

CPC分类号： H03K17/94 ,  G01F23/243 ,  H02H5/086 ,  H03K17/725 ,  Y10S315/04 ,  Y10S367/908

摘要： A liquid level presence detection circuit includes a selectively gatable TRIAC serially connected with a load and triggered into conduction by twin sensitive-gate SCR's connected anode-to-cathode with the gates of the SCR's connected to voltage divider circuits which provide gating current to the SCR's in response to the presence of a conductive liquid bridging the two spaced apart contacts of a liquid presence detecting probe. The circuit is used in wet-niche type lamp assemblies that provide underwater illumination in swimming pools and the like and in which cooling is effected by the surrounding liquid. The detection circuit advantageously interrupts the flow of electrical energy to the lamp when the level of surrounding liquid falls below a predetermined level to prevent over-temperature operation of the lamp and consequent damage thereto and resumes the flow of electrical energy to the lamp when the level of the surrounding liquid increases to a safe level to permit adequate cooling thereof.

摘要翻译： 液位存在检测电路包括与负载串联连接并由双敏感栅极SCR连接的阳极至阴极触发导通的选择性可对准TRIAC，其中SCR连接到分压器电路的栅极，其向SCR的栅极提供栅极电流 响应于存在桥接液体存在检测探针的两个间隔开的触点的导电液体。 该电路用于在游泳池等中提供水下照明并且由周围液体进行冷却的湿式小型灯组件中。 当周围液体的水平下降到预定水平以下时，检测电路有利地中断了对灯的电能的流动，以防止灯的过热操作并对其造成损害，并且当电平达到电平时恢复电能流向灯 的周围液体增加到安全水平以允许其充分冷却。

公开(公告)号：US06296450B1

公开(公告)日：2001-10-02

申请号：US09390269

申请日：1999-09-03

申请人： Tom Westberg ,  Richard E Mullen ,  Clement Lim Yu ,  Richard I Brown

发明人： Tom Westberg ,  Richard E Mullen ,  Clement Lim Yu ,  Richard I Brown

IPC分类号： F04B4900

CPC分类号： F04B49/06 ,  F04B49/12 ,  F04B2205/09

摘要： Systems and related methods pump fluid through a pump having a stroke volume. The systems and methods employ gravimetric control measures to monitor fluid flow through the pump. An actuator interacts with the pump during a stroke interval (TStroke) to pump fluid through the pump. The systems and methods couple a receptacle to the pump, to either dispense fluid into the pump or to receive fluid from the pump. The systems and methods detect changes in weight of the receptacle over a sample time period. The systems and methods achieve a desired flow rate (QDesired) by deriving an actual flow rate (QActual) by sensing changes in weight of the receptacle over the sample time period, taking into account the density of the fluid, and adjusting the stroke interval based upon QActual so that QDesired is achieved.

摘要翻译： 系统和相关方法通过具有行程体积的泵来泵送流体。 系统和方法采用重力控制措施来监测通过泵的流体流量。 执行器在行程间隔（TStroke）期间与泵相互作用以泵送流体通过泵。 系统和方法将容器连接到泵，以将流体分配到泵中或从泵接收流体。 系统和方法在一个采样时间段内检测容器的重量变化。 系统和方法通过在考虑到流体的密度的基础上感测容器在采样时间段内的重量变化并通过调节基于行程间隔的方式获得实际流量（QActual）来实现期望的流量（QDesire） 在QActual上实现QDesired。