US10438A - Copying-press - Google Patents

Description

E Z am Fig.2.

Inventor gem Witnesses l I .imm

oALvIN ADAM's, or Prr'rseURo, PENNSYLVANIA.

A 'COPYING-PRESS.

Specification of Letters Patent No. 10,438, dated January 24, 1854.

To all whom it may concern Be it known that I, CALVIN ADAMS, of

clare that the following is a full and exact description of the construction and operation thereof, reference being had to the annexed drawings, forming part of this specij- I p screw d, prevents the pressing plate 6, slipfication, in which- Figure 1, is a perspective view of my copying press withthe pressing plate closed, 5 and the lever pressed downbythe cam lever. Fig. 2 is a vertical section of press, with j the several parts in the same position as in Fig. 1. Fig. 3 1s a perspective view of my press, with the pressing "plate opened or raised and the cam lever thrown back.

Figs. 4 and 5 are elevations of my press,

designed to show the mode of raising the upper pressing plate suflicientlyto receive the copying book without lifting it up as shown in Fig. 3. v I

The same letters m te several figures refer to similar parts of the press. My improvement I consists in connecting the upper platen or plate of the press to the lower plate by a hinge, either attached immediately to the upper platen, or to a lever bar which carries it, so that the upper platen may be raised or opened like a b'ook to receive the copying b'ook. Also in the mode of giving the requisite pressure by the use of a cam working on the extremity of a lever, in combination with a screw to ad just the press to any required thickness of book to be used, or degree of pressure to be employed. Also in the contrivance for raising the upper pressingplate sufficiently to admit of slipping the copying book between the upper and lower platen by merely throwing back the cam lever, to avoid the necessity of opening the upper platen by hand.

I will now proceed to describe more particularly the construction and operation of my improved press.

In the several drawings a, is the lever platen or plate of my press, which is made suificiently strong to sustain the strain or pressure to which it is subjected: to one side of the plate a are attached the uprights b, b, to the top of which is attached by a hinge the lever bar 0, which extends, horizontally across the press. Through the center of this lever bar 0, passes I .justing scr-ew, d, which is turned by passing a pin through a hole m, in its head or by a key or wrench. The lower end of this screw which projects below the under side of t lever bar 0', is smooth, having no threads cut in it this portion. of the screw passes through a hole, through the center of the "upper pressing plate a; a shoulder on the upper part of the smooth portion 0t the ping up, and communicates the pressureof the leverbar 0, to the center of the upper pressingplate 6. Anutf, screws on to the end of the screw on the underside of the upper pressing plate e, and when screwed up is countersunkin the under side of the causing the plate 6, to turn around with the 1 turning of the screwj cl. On the'opposite side of the lower plate a, are the uprights g, 9', through the topof .which a pin or pivoth, passes which sustains and forms the fulcrum of the cam lever 71. The turn ing point it ofthe cam lever 2', is at such a relative height to the hinge of the lever bar 0, that when the lever bar 0, is on a horizontal position across the press or nearly so,-the end of the lever b2116 isiminediat 1 ;ii1ider the Can; of the lever 2'. Th'e ca'm at the en d' or the leverof such -a shape that the lever is thrown back, as shown in Fig. 3-, the end of the lever bar 0 is free, but as the lever is brought over the pressure begins and gradually increases until the lever is pressed down to the position shown in Figs. 1 and 2 whenthe pressure on the end of the lever bar 0 is the greatest.

As the point of greatest pressure of the cam, and the turning point of the lever bar I answer only for one thickness of book and a fixed degree of pressure. But this difiiculty is obviated by the adjusting screw d, which raises or lowers the upper platen 6, so as to adjust the distance between the upper and lower platens to suit any desired thick ness of copying book. The pressure is com munioated by the cam lever, andlever bar, through the screw d to the'center of the pressing plate a, so that the pressure is uni forth at all points of the pressing plate '0,

I and as the lever bar when pressed down by the cam of the lever z' is horizontal and parallel to the lower plate a, or very nearly so, the upper pressing plate 6 whether raised or lowered by the screw d, (which works perpendicularly or at right angles to the lower bar 0,) is also parallel to the lower pressing plate, any slight variation from a horizontal position of the lever bar 0, when subjected to the pressure of the cam lever 2', or inequality in the thickness of the. two sides of the copying book used, being compensated for by making the smooth part of the screw to fit loosely in the hole in the center of the upper pressing plate 6.

When it is desired to use my press, the

cam lever z, is thrown back and the lever bar 0, carrying the upp'er'pressing plate e,.is

raised, as shown in Fig. 3. The copying book is then placed in the center of the lower pressing plate a. The lever bar 0,. and

upper pressing plate are shut down,and the structed my press that when the cam lever 71, is thrown back, a finger In, which projects from behind the cam, see Figs. t and 5, passes under the joint of the lever bar 6, between it and the pin or rest Z, and slightly raises the lever bar 0, but sufficiently to elevate the upper platen so far above the lower platen as to admit of the copying book being inserted between the platens, or

withdrawn from the press as the case may be. The pin Z, serves as a rest to support the end of the lever bar when the copying book is removed from the press, and prevents the lever bar when the copying book is removed, fromfalling so low down as to be beyond the reach of the finger 70, but it is not made so high as that the pin will touch the end of the lever bar a, when the copying book is inserted and the upper platen is pressed down by the cam lever.

The action and mode of using my press is otherwise the same as hereinbefore described.

The advantages of my improved press are the facility of placing and removing the copying book in the press; the increased pressure given by the combination of the lever and cam; and the compactness and simplicity of construction as compared with other presses, used for the like purpose.

. What I claim as my invention and desire to secure by Letters Patent'is The combination of the lever bar and upper pressing plate, connected by means of the adjusting screw, and the mode of com.-

municating pressure to the upper. pressing plate by means of a cam at the end of a lever,

working at the end of the lever bar which sustains the upper'pressing plate; also the use of the finger at the end of the cam lever in combination with the rest and the other parts of the press for the purpose of raising the upper platen of the press and sustaining it in its place while the copying book is inserted or withdrawn substantially in the manner and for thepurpose hereinbefore set forth.

CALVIN ADAMS.

Test:

B. B. CAMPBELL, WM. N. HOWARD.

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