Personal items for sale

Horse Power Computer for Steam, Gas & Oil Engines

Golding, Henry Albert: Charles Grffin & Co., 1908.

A rotating logarithmic computer [sic, i.e. calculator] consisting of three moving circular varnished card pieces of graduating size turning around a brass rivet on a back-board, 6.5 x 6.5 inches, 16 x 16 cms. Together with the original 12 page instruction manual, illustrated.

The calculator and its accompaying manual are both in fine near-immaculate condition, as issued, with tissue guard in their original white cardboard box, the box itself being a touch bowed.

Henry A. Golding, the designer of this calculator, was the author of "The Theta-Phi diagram practically applied to steam, gas, oil, and air engines" first published in 1898.

In 1906, he submitted a complete specification patent application for "Improvements In Power Computing Slide Rules For Steam and Other Engines" (Original Patent Application Number 8,196). This computer, marked "Golding's Patent", is almost certainly the result of that application.

The calculator was designed primarily for steam engine but enables calculations for two-stroke gas and oil engines.

A Copac search shows only a single instance of this early computing machine recorded as appearing in the holdings of major British and Irish libraries.

£45 including UK postage and insurance (enquire for overseas delivery)

Retirement sale

I'm selling this because of my retirement. If you're interested in purchasing it, please first contact me by email simply to check it's still available and has not been purchased elsewhere.

Your email should contain the title of the item (in red at the top of this page) and its price; your approximate location or full postal address, and confirmation of your interest.

I'll reply as soon as I receive your email (which may not be immediately, depending on where I am) to make appropriate arrangements with you for supply and payment by credit or debit card through my secure server or by direct payment to bank, whichever you prefer. Tell me which.


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