Samuel Blatchford

“ A peculiarity of the conical arbors is stated in the specification to be that they are tapped in 'from the outside,' and 'keyed upon the inside,' in contradistinction to the then existing most approved method of having screws with conical heads, the heads being countersunk in one of the plates, and the cone shape of the heads holding the screws so as to make it unnecessary to rivet them on the outside of the safe, the screws not going through all the plates, the head of the screw being towards the inside of the safe and the other end of it not projecting beyond the outside. ”

“ Within the meaning of sections 7 and 15 of the act of 1836, as modified by section 7 of the act of 1839, the invention covered by claim 3 of the patent in suit was in use and on sale more than two years before the appellant applied for that patent, and such use and sale were, also, with the consent and allowance of the appellant, and the use was a public use. It is contended that the safes were experimental, and that the use was a use for experiment. ”

“ Figure 3 is a detail view, in cross-section, of the door of the safe, showing the shape of, and manner of securing, an arbor. The most approved manner of securing together the numerous plates forming the casings and doors of safes is by means of screws tapped in from one series of pairs or triplets of plates from the inside presenting no rivet heads upon the outside surface of the safes. ”