Exploded view
Front view
Side view
Front of bridge
Back of bridge
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Plans used were those from "Bridge Jack Construction" by E.L.
Wolfensberger as published in the SCAVM Bulletin in November 1993 and
displayed on their website at
http://scavm.com/Bridgejk.htm. They are primarily for making one mainly
from wood, but being used to making things from metal I decided to make the
body from an off cut of 5/16" aluminium plate
(from Geraldton Boat Builders Pty Ltd.) The guides are from approx. 1/8"
nails, the screw 3/16" with Whitworth thread, and knob from 3/16" steel scrap to hand (only because I had no aluminium in that thickness.)
and a piece of leather from a worn out garden glove for the base. The only tools required are a hacksaw, drill (preferably a drill press) flat and round files, sandpaper and a 3/16" tap. In retrospect the screw length could be shortened and the knob made from thinner or lighter material, as the force needed to rotate the screw for lifting the strings is minimal. |
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This page was last updated on 07 April 2004