In the meantime to keep the interested, interested, here is an excellent little book on pattern making. "Pattern-Making" was published in 1921 and covers the equipment and methods used very well. There is a large number of specific examples of machine parts with drawings and molding procedures. Many of the parts are outdated but the equipment and procedures remain mostly the same. Very useful information for the home hobbyist learning to make and cast his own patterns.
"Pattern-Making" can be downloaded on my Books - Free Downloads page.