Forum: US Patent Specifications
US Patent Specifications on locks and security devices - For Reference, Research and Discussion.
Users Browsing this Forum
There are currently 7 users browsing this forum. (0 members & 7 guests)
US Patent Specifications on locks and security devices - For Reference, Research and Discussion.
There are currently 7 users browsing this forum. (0 members & 7 guests)
This came from a safe previously used in a quarry to store explosive, mainly or solely black powder. I received from a retiring ironmonger/locksmith/tinsmith in the 1970s. His Grandfather had taken a...
Presumably light weight, but more difficult to recycle than metal. Not good for the future.
Perhaps 'rare' needs revising in view of the numbers of items previously thought to be rare now appearing, because it is easy to see a worldwide market of sellers all over the world on a few major...
I was unaware that copies of that lock have been made, but then again it is so unique in its design I am not surprised it was copied. Sure wish I had a spare $10,000 around as I would be the current...
Makes me think it is a Tann lock that has possibly been rekeyed by Milners, or on a Milners stamped blank
Never seen a mappins patent with only 4 guards. Odd. It's chicken and egg, I find that the key will not want to go in until it's already cut as the sharp edge on the blank does not move easily...
Is it a Mappin