US 15011 A
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Description (OCR text may contain errors)
UNiTED sra'rns PATENT OFFICE CHRISTIAN KNAUER, OF PITTSBURGH, PENNSYLVANIA.
Specification of Letters Patent No. 15,011, dated June 3, 1856.
To all whom t may conce/m Be it known that I, CHRISTIAN KNAUER, of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Copying- Presses; and I do hereby declare that the following, is a full, clear, and exact description of the construction and operation of the same, reference being had to the anneXed drawings, making a part of this specification, in which--` Figure 1 is a perspective view; Fig. 2, a transverse vertical section; Figs. 3, 4 and 5, perspective views of detached parts.
In all these figures the same letters refer to like parts.
A is the bottom plate; B the frame, consisting of the cross-piece a a, and the pillars b, fastened or cast on the bottom plate; D is the top or pressure plate, which is provided with the flanges cl, CZ (of which one is shown separately in Fig. 5); this plate is guided on the pillars b of the frame.
C is a cam, which call the regulating cam; it swings on the pivot c in the middle of the cross piece a, a, and is provided with a handle e; the cam is constructed so, that it has an outside eccentric surface m, m, which is toothed or roughened, and an inside surface n, a, which is parallel to the surface m, m, and smooth; the object of this construction will be shown hereafter; F is a friction-roller, whose pin f passes through the holes f in the flanges d; G is another cam, which is shown separately in Fig. 3, and which I call the pressure cam; its journals g, g, pass through openings (g) in the flanges d; H is a lever set firmly on one of the journals g; J is an intermediate block, between the pressure cam Gr, and the regulating cam C, which I call the friction piece (the same is shown separately in Fig. 4); its projections j y' enter into the recesses r r in the flanges CZ, d; these recesses are cut out sufiiciently, to allow the friction piece to move a little up and down, so as to get into, or out of contact with the surface m of the regulating cam; the surface of the friction piece, which comes into contact with said cam C, is also toothed or roughened, similar to the surface m, m. The purpose of the regulating cam is to raise or lower the top plate D, so that the space between said plate and the bottom A may be regulated to suit any size or thickness of copying books. The pressure, required for the copy- I ing process, is effected by means of the pressure cam G, which is operated by its lever H.
The operation of the press is as follows: Vhen the lever H is pressed down, the cam Gr presses against the friction-piece J, which, as it bears against the cam C, is prevented from yielding, causing hereby the plate D to descend or press downward; the cam C during this operation is kept from turning around its pivot c, by its toothed surface fm, m being in contact with the toothed surface of the friction piece. When the pressure is down and the lever H is raised again the friction piece J will be released from its contact with the cam C, and the friction roller by the weight of the top plate D, will come down on the inner surface n u of the cam C, making thus the top plate D suspended on the said cam C; in this position the top plate can be raised or lowered according to the direction, in which the cam C may be turned (by means of its handle e) the friction roller traveling on the inner surface a n of the cam.
The manner in which the press is used, according to the described construction, is as follows: Lift the lever H, as indicated by arrow in Fig. 2; and also turn the regulating cam, as indicated by arrow at the handle e; put then the copy book between the plates A and D, and allow the cam C to fall or turn back, whereby the plate D will descend, down on the book, then produce the pressure, by pressing the lever H down. Lift now the lever H up again, and also the handle e, whereby the top plate is raised, so that the book can be taken out again. By letting, in this position of the press, the lever H drop down, the press plate will be kept in its raised position, as the friction piece will get into contact with the surface m, m.
What I claim herein as new, and desire to secure by Letters Patent is- Adjusting the plates of a copying press to suit different sized books, by means of a regulating cam (C), which carries the top plate (D), so arranged, that it shall be the bearing of the pressure cam ;-either directly or by the intervention of the friction piece J, substantially as described.
HENRY Mosnn, P. M. KENNA.