Browse Prior Art Database

Air Flow Sensor

IP.com Disclosure Number: IPCOM000044256D
Original Publication Date: 1984-Nov-01
Included in the Prior Art Database: 2005-Feb-05
Document File: 2 page(s) / 25K

Publishing Venue

IBM

Related People

Kiser, JM: AUTHOR

Abstract

In electronic apparatus it is essential that cooling fluid flow be maintained. The detection of fluid flow at locations remote from the source of fluid flow in an inexpensive and reliable manner is provided by the present invention. A fan blade 1 is mounted on an axle 2 and supported on a housing 3 by a snap fitting or the like. An optical source detector 4 is mounted in an assembly 5 and has an optical axis 6 which intersects the path of the fan blades. As the fan blades rotate, the optical path is interrupted and the rapidity of the interruptions provides an indication of the amount of fluid flow in the area of the apparatus where the fan and detector are mounted.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

Air Flow Sensor

In electronic apparatus it is essential that cooling fluid flow be maintained. The detection of fluid flow at locations remote from the source of fluid flow in an inexpensive and reliable manner is provided by the present invention. A fan blade 1 is mounted on an axle 2 and supported on a housing 3 by a snap fitting or the like. An optical source detector 4 is mounted in an assembly 5 and has an optical axis 6 which intersects the path of the fan blades. As the fan blades rotate, the optical path is interrupted and the rapidity of the interruptions provides an indication of the amount of fluid flow in the area of the apparatus where the fan and detector are mounted. These air flow sensor assemblies can be located at a number of positions within an electronic apparatus so that any restriction or blockage of fluid flow within the electronic apparatus can be sensed.

1

Page 2 of 2

2

[This page contains 1 picture or other non-text object]