Ron wrote in
:

On Nov 23, 9:17*pm, Red Green wrote:

1) They used to make rubber caps for them long ago. Probably were
sold to
help prevent wall damage but really don't know.

Weren't those for kid proofing? IOW, you had the squeeze the rubber
cover in order the turn the doorknob. If a child tried to turn the
knob the cover would just spin around the knob.

I don't know Ron. Just remember them as a kid. They were on the knobs that
weren't glass. Might have been to keep us from eating the lead paint
chipping off the knobs...but that never stopped us.