公开(公告)号：US4251026A

公开(公告)日：1981-02-17

申请号：US966651

申请日：1979-12-05

Applicant: Howell T. Siegel ,  Jeffrey I. Siegel ,  Richard E. Shank

Inventor： Howell T. Siegel ,  Jeffrey I. Siegel ,  Richard E. Shank

IPC: F24F11/00 ,  F24F7/02

CPC classification number: F24F11/0001

Abstract: A control system for use with an attic ventilation fan operates to reduce heat buildup during the summer months and also to prevent frost buildup during the winter months by eliminating the cold, moisture-laden, air from the attic. A summer control unit is provided to eliminate the hot air and a winter control unit operates without the need of a humidistat to evacuate the moisture laden cold air during the winter months.

Abstract translation: 与阁楼通风扇一起使用的控制系统可以在夏季减少热量累积，同时通过消除阁楼的冷气，潮湿的空气，防止冬季的霜冻积聚。 提供夏季控制单元以消除热空气，冬季控制单元在冬季不需要潮湿的空气排出潮湿的冷空气的情况下运行。

公开(公告)号：US5160974A

公开(公告)日：1992-11-03

申请号：US542967

申请日：1990-06-25

Applicant: Jeffrey I. Siegel ,  Sidney Braginsky

Inventor： Jeffrey I. Siegel ,  Sidney Braginsky

IPC: G01N15/14 ,  G01N21/05 ,  G01N21/53 ,  G01N21/59

CPC classification number: G01N15/1404 ,  G01N21/05 ,  G01N15/1434 ,  G01N2021/0346 ,  G01N2021/5957 ,  G01N21/53

Abstract: A closed flow cell having a cavity with a flexible diaphragm at either end of a flow tube. A sample having particles or biological cells suspended in a fluid is placed within either cavity. Movement of the diaphragm forces the fluid to flow through the flow tube back and forth between the two cavities. Detectors are positioned adjacent the flow tube. A light source, typically a laser, illuminates the flow tube. Scattered light from the light source is detected by the detectors. Various properties of the particle are thereby determined.