Patent Publication Number: US-2007101781-A1

Title: Linear solenoid operated door locks with spring return, AC and DC types

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS  
      This application claims the benefit of patent application No. 11/186,996, filed on Jul. 22, 2005 by present inventor. 
    
    
     FEDERALLY SPONSORED RESEARCH  
      Not Applicable  
     SEQUENCE LISTING OR PROGRAM  
      Not Applicable  
     BACKGROUND OF THE INVENTION  
      1. Field of Invention  
      This invention relates to linear spring return solenoid door locks, specifically to such doors which are, assigned to certain people they responsible that area, no one can open that door. Also people worry about burglars of there homes, they need said lock.  
      1. Background of the Invention  
      Condominium doors, Apartment doors, Business, Factories, where safety is important like inventory listing and important documents are stored. Example: Very little electricity, and safety is 100% can not be open by others. Also safe no electricity goes to rest of the said locks, and no electric shocks. to worry of any kind. Can not lock out them self&#39;s, even if have powerfailer by electric company. The spring retracts the plunger. This said lock is very permanent nature. This is a new invention.      
    
    
     BRIEF SUMMERY OF THE INVENTION  
      I have my problem with locks, someone can open my door and that someone breaking into my home, and I do not who is it. So I have to come up with something, I try to buy keyless lock, but nowhere I can found. So I had to come out with said lock. Called one of the company selling spring return solenoids, and they made one. It Works without keys so far works very good, because that person can not open my door, with keys. That made me to think to invent that device, to have a secret combination to that device, I can open only my self. I thought many other homeowners, condominium owners, apartment renters, business owners, can use that device. I try to buy it but no one made such device as I wanted. That made me to invent such device. That is why asking U.S. patent number for it. Because very use fool and new. Easily marketable because 100% burglar proof. Also does not have to worry about people lock them self out for. When has a power failure automatically the spring returns the plunger and the door open. Need no fear to be locked out from the house.