Screw on chuck removal device

[Agroshield]

While looking for Jacobs chuck removal wedges for another thread, I saw this:

Pardon our interruption...

It locks the bull gear, which is a lot better than some methods that lock the back gears.

Might be a useful idea for someone.

Might be a marketing opportunity for someone with a 3D printer.

 

[Seadog]

Useful for open head lathes, which the early Atlases were. You couldn't fit one in a Boxford, for example, but a nice idea.