An Improved Leg Vise: Kiefer meets farm vise

Update: new links, video fixed.

A clever fellow, Klaus Kiefer, saw my post on the angle brace leg vise and made incredible improvements. Kiefer ditched the two side brackets in favor of a large center brace and added a quick release. Kiefer's farm vise is simple to build from common materials.

Sketch Up Model
Leg Vise - Lumberjocks Page
Leg Vise Blog Post on LJ

Another Farm Workbench with angle brace leg vise

This workbench is more primitive but carries the same angle brace leg vise mentioned in my previous blog post. Found in Farm Shop Work: Practical Manual Training, by George M. Brace and D. D. Mayne, 1915.

Unusual Early 20th Century Leg Vise

[Updated 11/14/14 with new pictures]
While perusing Google Books I ran across an unusual leg vise arrangement on a Nicholson style bench in Farm Woodwork by Louis Michael Roehl, 1919. The leg vise has two angled braces rather than the usual pin bar. The angled braces, along with the screw, form a triangle that rides underneath the top keeping the chop parallel to the leg. As the vise attempts to rack, the downward force pushes the tail of the bracket into the benchtop keeping it level. The pictures explain better.