I sure hate ****ing matches, but I've always known these as knife hinges.

So, apparently, does this company that makes them:
http://weberknapp.com/press/?page_id=872

On 2/19/2015 3:22 PM, wrote:
http://i57.tinypic.com/2rpcwpl.jpg

Anyone know where to source these? Or at least what they are called so
I can search?
The door leaf fits in a rabit on the door.
Thanks.