Thomas Tool & Die, Inc., a company which played a major role in the design and development of the Stony Ridge Observatory, was founded by one of Stony Ridge's founding members, Dave Thomas, Sr.
Below are links to pages from a 1970's brochure from the Thomas Tool and Die company which was kindly supplied to SRO by John W. Briggs of Colorado. John is the steward of an original 5-inch solar spar telescope built at TTD by master telescope builder George Carroll. There is a 4-inch version of that telescope is featured in this brochure on page 3 of this 10-page brochure. Stony Ridge's 30-inch Carroll telescope is featured on page 5 of the brochure.