Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Key sensor alarm for door locks










Image Number 3 for United States Patent #5680094.

A key reminder device for use in combination with a key lock mechanism having an adjustable timer with a predetermined timer interval electrically coupled to a replaced power supply. The timer is energized upon detection of a conventional key inserted into the key lock mechanism. Should the key remain in the key lock mechanism beyond a predetermined time, the timer will activate an audible alarm to remind the owner of the keys to remove them. Should the timer be set at a low level, the device operates to indicate the presence of a key. When used in combination with a visual indicator, the key reminder provides an indicator of door entry to the hearing impaired.








 
 
  Recently Added Patents
Fusing apparatus and image forming apparatus provided with the same, and heating apparatus
Monitoring and correcting upstream packet loss
Carrier or transport strip
Thermoplastic resin composition
Controller interface providing improved data reliability
Apparatus for performing timer management regarding a system timer scheduler service, and associated method
Paper product with surface pattern
  Randomly Featured Patents
Method and apparatus for accessing a memory array
Electrohydraulic control system for the actuation of an actuator in a motor vehicle
Thermophilic DNA polymerases from Thermoactinomyces vulgaris
Flash memory and method for fabricating the same
Rifle rest
Formation of nanowhiskers on a substrate of dissimilar material
Functionalized polyamine chelants
Novel N-(bicyclic heterocyclyl)-4-piperidinamines
Liquid crystal display
Lachrymator aerosol formulations