Design The Sargent Degree key system is actually comprised of 3 sub-systems: Degree Level 1 Degree Level 2 Degree Level 3 Degree Level 1, or DG1, utilizes a patented keyway with conical pins. If you are at all familiar with the Medeco3 BiLevel platform that is essentially what DG1 is. [...]
On Saturday, Medeco celebrated 50 years in business with a large party at their Salem, Virginia headquarters. I was lucky enough to be there. Before I discuss the celebration, let me stress how beautiful of a place Salem and the Roanoke Valley is. I took these pictures from Medeco's parking [...]
Note: This is article is not a primer for key control policies and procedures. I don't proclaim to be an expert on key control policies or procedures but I have created a few from scratch. Maybe that has taught me just enough to be dangerous. Be that as it may, [...]
Patent Number: 167,088 (Google Patents) Issue Date: August 24, 1875 Inventor(s): Philo S. Felter Background Philo S. Felter might be one of the most underrated and unknown innovators in the history of locks. In March of 1868 Philo received a patent for one of the earliest, if not [...]
We've recently added more documents to our High Security page in the Library. In the Manufacturer's Literature and Manual section, you can find the following: ASSA High Security Locks Catalog and Technical Manual ASSA TWIN 6000 – Technical Service Manual BiLock North America, Inc. Catalog BiLock Exploded Illustration Corbin Russwin, [...]
Patent Number: 3,499,302 (Google Patents) Filing Date: March 1, 1967 Issue Date: March 10, 1970 Inventor(s): Roy C. Spain, Roy N. Oliver, Elvis C. Flora, Paul A. Powell Background Linus Yale Jr. formed the Yale Lock Manufacturing Company with Henry R. Towne in 1868. Yale flourished and by [...]
We've added a comprehensive list of patented lock and keys to our High Security Resources page (direct link here). This list contains patented keys and locks starting in 1987 with the expiration of the Medeco "Original" patent all the way through 2031, when the Abloy Protec2 utility patent will expire.