Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co LtdfiledCriticalToshiba Corp
Priority to JP15195876ApriorityCriticalpatent/JPS5376872A/en
Publication of JPS5376872ApublicationCriticalpatent/JPS5376872A/en
Indicating Or Recording The Presence, Absence, Or Direction Of Movement
(AREA)
Abstract
PURPOSE: To detect the stop of a cooling fan with a simple circuit provided with a sensor which detects the pulses generated by the revolutions of an impeller and a light emitting diode.