US 343582 A
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J. HARWOODIY RINGGAGB. No. 343,582n PatentedvJune 15, 1886.
UNITED STATES PATENT OEEICEo JOHN HARWOOD, OF SOMERVILLE, MASSACHUSETTS.
SPECIFICATION forming part of Letters Patent No. 343,582, dated June l5, 1886.
Application filed March 20, 1886. Serial No. 195,899.
To all whom it my concern,.-
Be it known that I, JOHN HARWOOD, of Somerville, in the county of Middlesex and State of Massachusetts, have invented a new and useful Improvement in Ring-Gages, of Whichthe following is a specification.
Thisimprovement relates to gages for jeWeL ers use in measuring and ascertaining the size of finger-rings.'
In the accompanying drawings, in which .similar letters of reference indicate like parts,
Figure lis an elevation of my improved ringgage. Fig. 2 is a longitudinal section of the same.
Ring-gages have been heretofore ordinarily constructed of wood or metal. Vhen made of Wood, they soon warp out of shape, and when made of metal they are apt to scratch and mar the ring beingimeasured.
In this invention I provide a core of metal, and cover or coat it with Celluloid, zylonite, or other analogous substance or compound which Will not scratch the ring.
A is ametallic tubular core,and B is a cov- (No model.)
As an improved article of manufacture, a
ring-gage constructed with a metallic core covered or coated with Celluloid, zylonite, or
other analogous substance or compound, substantially as and for the purpose set forth.
HENRY W. VVTLLIAMs, J. M. HAETNETT.