I think what you are talking about is a food mill.

This one looks like a basic food mill.

This one looks a bit more unique.

Here is a review of 5 different food mills.  I believe you can click on individual ones to get more information.

I will say... my Mom had an old one.  The one that I have lets more tomato seeds thru than the one my Mom had.  So, sieve size might be something to pay attention to, if you decide to buy a new one.