. Bulletin - United States National Museum. Science. '^*'t . ^^/'-^A. James lUnjiie's Jmprocef/ Ifood Smr. J'i^.l Figure 29.—Improved wood saw patented by James Hayne on August 9, 1859; reissue no. 1526, August 25, if although there is less width at the middle of the blade or blank, (occasioned by the scallops a a, which scallops are necessary in order to preserve the symmetry of the article,) yet there is greater thickness, and, consequently, requisite strength. The sheets or plates are rolled of different thicknesses and widths, according to the size and quality of the tool designed to be ma
. Bulletin - United States National Museum. Science. '^*'t . ^^/'-^A. James lUnjiie's Jmprocef/ Ifood Smr. J'i^.l Figure 29.—Improved wood saw patented by James Hayne on August 9, 1859; reissue no. 1526, August 25, if although there is less width at the middle of the blade or blank, (occasioned by the scallops a a, which scallops are necessary in order to preserve the symmetry of the article,) yet there is greater thickness, and, consequently, requisite strength. The sheets or plates are rolled of different thicknesses and widths, according to the size and quality of the tool designed to be made therefrom, and dies or punches are made of different sizes to correspond. It is obvious that this process is a great saving in the cost of manufacture. At least one hundred per cent, is saved by this process, and a more uniform, perfect, and better article is produced, and furnished to the public at a much less expense. It is doubly rewarding to those interested in the provenance of design characteristics to repeat Parr's statement that the scalloped blade, still retained today in screwdrivers of British manufacture, was not intended to impro\e the function of the tool but rather "to preserve the syminetry of the ;"[!] In much the same fashion as the screwdriver, the common clawhammer eluded the illustrators except as a symbolic device in art. Primarily, this seeins due to the persistence of mortise and tenon architec- ture where the treenail took the place of the nail and where the auger and wooden-headed maul were the builder's most frequent companions. But with the coming of the cheap nail and the balloon frame, the clawhammer became a more familiar object. In the patent drawings will be found the most precise ren- derings of the hammer, graphic evidence that fairly establishes this as the earliest appearance of the claw- hammer as it is known today. A New Hampshire man, Phineas Eastman, of Canaan, in 1838, sent to Washington his specifications fo
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Keywords: ., bookauthorun, bookcentury1800, bookdecade1870, booksubjectscience
