[kach22i]

http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=5950559.PN.&OS=PN/5950559&RS=PN/5950559

Click on "images", may have to download a little Quick-Time upgrade, worth it, as I have not seen good patent images like this before.

http://foxxaero.homestead.com/indrad_008.html


The source of all the above (where I started, many more craft).

http://foxxaero.homestead.com/indrad3.html