|From the Patent Office Report (Report of the Commissioner of Patents for the Year 1855 - Arts and Manufactures.) Vol. 2. (Washington, D.C.: Cornelius Wendell, 1856) Text appears on page 169, illustration appears on page 290.|
No. 12,560.David Shive.Machine for Polishing Daguerreotype-Plates.Patented March 20, 1855. (Plates, p. 290)
Spur-wheel I is attached to the bottom of eccentric H, the shaft E passing loosely through both. Spur-wheel K is fixed to shaft E. Spur-wheels M N are of one piece. The circular pieces C D are carried round by shaft E and arms F, they being connected therewith by cranks G, and (the eccentric H being confined in the centre of the lower circular piece D, and driven at a different speed from that of the shaft E, upon which it turns) the circular piece C, with the fixed-block P, to which the plate is attached, is necessarily caused to gyrate, and the polishing-pad B being held down upon it, the plate will be polished.
POLISHING DAGUERREOTYPE PLATESDavid Shive, of Philadephia, Pa.: I do not claim effecting a gyratory motion of the pad for polishing the surfaces of daguerreotype plates, or other like surfaces, by means of machinery, as such has been so effected before for similar purposes.
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