PSN-L Email List Message

Subject: Acouple web images and text of the ball bearings rims support "rods", of the test crossed rod hinge/suspension.
From: meredith lamb paleoartifact@.........
Date: Sat, 5 Nov 2005 12:58:46 -0700


Hi all,

I've put up on the web acouple photos of the simple table top/edge test
mechanism
I used to test the friction of this crossed rod hinge/suspension model,
where the
outer rim of precision ball bearing assemblys are used as the support
"rods", of
the crossed rod; that also has attached the boom/mass (pendulum) used. The
pictures focus is on the bearings or the hinge and not the pendulum mass;
which
is roughly 14" down the boom away from the Tee cross rod joint. The cross
rod on
such a hinge, would rotate on the bearing rims both toward and away from th=
e
viewers pictures direction. Its most likely someone else has used such in
the
past, but I'am not aware of it at this time. See:

http://home.earthlink.net/~meredithlamb.crbs.html

The two photos lighting wasn't the best, but the pictures convey the idea
fairly well.

This isn't a actual operating seismometer, so be aware other (non cross rod
touching)
parts would have to be added...it is only a friction test of the crossed ro=
d
and the
two ball bearing rims surfaces friction.

Take care, Meredith Lamb
Hi all,

I've put up on the web acouple photos of the simple table top/edge test mec= hanism
I used to test the friction of this crossed rod hinge/suspension model, whe= re the
outer rim of precision ball bearing assemblys are used as the support "= ;rods", of
the crossed rod; that also has attached the boom/mass (pendulum) used. = ; The
pictures focus is on the bearings or the hinge and not the pendulum mass; w= hich
is roughly 14" down the boom away from the Tee cross rod joint.  = The cross rod on
such a hinge, would rotate on the bearing rims both toward and away from th= e
viewers pictures direction.  Its most likely someone else has use= d such in the
past, but I'am not aware of it at this time.  See:

http://home= ..earthlink.net/~meredithlamb.crbs.html

The two photos lighting wasn't the best, but the pictures convey the idea f= airly well.

This isn't a actual operating seismometer, so be aware other (non cross rod= touching)
parts would have to be added...it is only a friction test of the crossed ro= d and the
two ball bearing rims surfaces friction.

Take care, Meredith Lamb

 

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