The CRF emergency door has an access panel at the bottom crane hinge block, assumed to be used for servicing the the hinge components and apply lubrication. Not sure how the main door hinge blocks...
Here is the door shock around 2010
Thank you very much for your reply and easy to understand description. I FINALLY understand how this lock works!
You are very kind to take the time to explain this to me
While I am not clear on the patent explanation regarding the down force, all the hinge blocks(knuckles) are load bearing. There considerable side loads to be taken into account.
On the surface it would appear that the non-load-bearing hinges are as represented in the diagram. However, let's look at the Remington-Sherman US patent 793,703 (filed 1904):
As can be seen,...
Crane Hinge Configurations
Yes I have never been over there with the floor dropped but there is a corresponding shock that is visible down below to stop the door when fully opened.
The One King West crane hinge knuckles are below the door knuckles, so the door appears to 'drop' into place with each hinge knuckle bearing equal weight. The Cleveland Federal Reserve crane hinge...