![Image](http://i565.photobucket.com/albums/ss100/geoanmel/D3B46839-508A-4BF6-B63B-6DE78EB2F195-98-00000000441AA4ED.jpg)
I saw plans once on how to build a homemade vise that works by transferring the force of gravity from the vertical plane to the horizontal plane. This design seems like it would be the most user friendly of all types of vises when one needs to work quickly and where only moderate pressure is needed to hold an object in place.
The diagram above is the best my limited drawing skills will allow me to produce. Hopefully is will be sufficient for someone to enlighten me on the proper name or, better still, a link to where such plans might be found.