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
Ion generation using wetted porous material
Method of predicting a motion vector for a current block in a current picture
Systems and methods for unchoked control of gas turbine fuel gas control valves
Signal routing dependent on a loading indicator of a mobile node
Method and system for security authentication of radio frequency identification
Bicyclic azaheterocyclic carboxamides
Database caching utilizing asynchronous log-based replication
  Randomly Featured Patents
Method and apparatus for auto-assisting agents in agent-hosted communications sessions
Water amusement park conveyor support elements
Thermally-transferred color filter array element and process for preparing
Transdermal drug delivery devices with amine-resistant silicone adhesives
Interoperability of legacy alarm system
Magneto-optical recording medium, method of manufacturing magneto-optical recording medium, method of recording on magneto-optical recording medium, and method of reproduction from magneto-opt
Touch probe
Basketball
Aerosol hair spray compositions comprising combinations of silicone-grafted copolymers
Curable (meth)acrylate compositions