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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.
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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.
   The inventor says: 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.
   But I claim the shaft E, with its arms F, cranks G, the pieces C and D, or their equivalents, and the eccentric H, with its spur-wheel I, in combination with the united spur-wheels M and N, and the spur-wheel K, when constructed and arranged substantially and for the purposes as described.

Notice of the patent appeared in the Scientific American. Vol. 10, No. 29 (31 March 1855) pg. 230 under the heading of "List of Patent Claims issued from the United States Patent Office":

   POLISHING DAGUERREOTYPE PLATES—David 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.
   But I claim the shaft E, with its arms F, cranks G, the pieces C and D, or their equivalents, and the eccentric H, with its spur-wheel I, in combination with the united spur-wheels M and N, and the spur-wheel K, when constructed and arranged substantially and for the purposes as described.

(End of text. Please refer to our textnote regarding this text.)

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