Abstract
MR. THOBOLD, 20, Rathbone Place, W.I, sends, us particulars of a new instrument which is a combination of scale and compass. The compass points travel on a beam carrying interchangeable scales. The two points terminate in movable heads on the beam which are adjustable, one possessing a micrometer. The instrument is also supplied with calliper points for external and internal measurements. The maker claims that great accuracy is obtainable, and for fine drawing in the field of physical science and engineering the invention seems likely to be valuable. The cost of the instrument is £7 7s.
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A Direct Reading Universal Drawing Compass. Nature 133, 171 (1934). https://doi.org/10.1038/133172a0
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DOI: https://doi.org/10.1038/133172a0