Grace's Guide

British Industrial History

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 142,361 pages of information and 227,857 images on early companies, their products and the people who designed and built them.

1851 Great Exhibition: Official Catalogue: Class X.: D. J. Wertheimer

From Graces Guide

Jump to: navigation, search

387. WERTHEIMER, D. J., 5 Charing Cross — Patentee and Manufacturer.

Calculating machine, performing the operations of the four arithmetical rules, viz., addition, subtraction, multiplication, and division, simply by mechanical action; and applicable for addition and subtraction of English money, from one farthing up to one million pounds sterling.

Calculating machines for Indian, American, Russian, Prussian, Brazilian, Portuguese, Neapolitan, Roman, French, Turkish, and Chinese money.

Counting machine, for showing the number of strokes made by a steam-engine, or any other piece of machinery; and which can also be used for telling off scores, etc.

[Automaton calculation of this kind is effected by a number of toothed wheels, each turning freely about its own centre, and the " value" of the operations depend upon the number of teeth in those wheels: thus, if a wheel have 12 teeth, it may be used for pence; another with 20 teeth may be used for shillings, and so on. But, notwithstanding the skill and ingenuity bestowed upon such instruments, their power is very limited.—J. G.]


See Also

Loading...

Sources of Information