Apparatus for detect missing battery in smoke detector

摘要: A battery-powered smoke detector in which the battery is inserted a removable door that then into to power rendered incapable of insertion unless place door. spring-loaded stop moved by spring position where it prevents from being detector. pin female terminal engages male forced away spring. When depressed manually and terminals, latching stop, holding will not interfere with The absence provides warning an observer operable for lack battery.