US77577A - braidwood - Google Patents

Description

2 Sheets-Sheet 1.

w. BRAI DWOOD, PRINTING PRESS.

No. 77,577. Pa tnt ed May 5, 1 868.

Wimemesr Y max/91M 2 Sheets- Sheet 2.

w. BRAIDWOOD.

PRINTING mam,

No. 77,577. Patented May 5, 1868.

WILLIAM, BRAIDWOOD, or MOUNT VERNON, NEW YORK.

Letters Patent No. 77,577, dated illay 5,1868.

IMPROVEMENT IN PEINTING-PRESSES.

fitlge firlgrhult much a in tlgest acne ijlttiut not making Qiltl at flgt timttt.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, WILLIAM BRAIDWOOD, of Mount Vernon, in the county of Westchest-er, and in the State of New York, have invented a new and useful Improvement in Printing-Presses; and I do hereby declare that the following is a,full, clear, and exact description thereof, which will enable those, skilled in the art to make and use the same, reference being had to the accompanying drawing, forming part of this specification, in which drawing- Figure 1 is a vertical cross-section of a printing-press containing my invention.

Figure 2 is a side elevation, showing the platen and ink-roller frame down.

Figure 3 is a front elevation, taken while the parts are in the position represented in fig. 1.

Similar letters indicate corresponding parts. 7

All the parts of a printing-press arenot represented, but only such as arencccssary to enable me to fully explain my invention.

My invention relates to that class of printing-presses which has t he'form in a vertical position.

The letter A designates the frame of the press, in which the main shaft B has'its bearings. From'a; pulley, 0, formed on this shaft, a belt extends to and drives the large ink-distributing roller D, whose position, as in some other presses of this class, is abovc the place occupied by the form; The letters V V designate wheels, of considerable diameter, which are placed on the ends of shaft B, outside of the frame, from crank-pins on which wheels extend the connecting-rods J, which operate the platen, the; front ends of said rods being pivoted to the ends of hubs W W formed on the edges of the platen. 4

The letters K K designate studs which connect the platen to the frame, and upon which studs the platen is vibrated.- The ink-roller frame F is arranged to move vertically in the frame A in grooves, in whose sides it is guided in the usual manner. I

The ink-rollers G are, in this example, three in number, but I do not restrict myself to thisnumber, as the number may be increased or diminished, according to the size of the press, or character of the work that is being printed. Over the main ink-distributing'roller D, and in contact therewith, I arrange the supplementary distributing-roller E, placing it in such a position that the same vertical line is tangential to the front side of each of said rollers. The usual vibratingroller is not here shown.

' The upper roller, E, is allowed to rest upon thelarger roller, so as to be rotated from its contact therewith, whereby the ink-distributing surface is greatly increased, and the ink-rollers G are supplied with ink, notwith standing more than two such rollers are placed in the frame F; When it is desired to increase the distributingsurface, I place an additional distributing-roller above the roller E, and in consequence thereof I amable to use additional rollers G, one or more, in the ink-roller frame F. i

The ink-roller frame F is operated and moved up and down in its guides-by means of the rigidarms'H H, which are pivoted or otherwise suitably connected to the upper part of said frame F, and to the upper part of the platen. By mcansof this arrangement, the inking-frame is made to ascend and desc'end by a positive move ment with-the vibrations of the platen, whose upward movement towards the form causes the frame F to rise to the distributing-rollers D E, and whose downwardmov ement causes the said frameto descend to the form.

The fingers that compose the frisket L project upwards from the rock-shaft M, whose bearings are below the inner face of the platen.

One end of saidshaft M has a right-angled projection or arm, N, on whose extremity is a roller-pin that is fitted to roll in the groove of the stationary cam O, which consists, in this cxauiplc, of a slotted arm'that extends towardsthe left from one side ofthe frame A.

The said cam is so timed as to open and close the frisket automatically through the movements of the platen, so as to hold and release the sheet to be printed at theproper times.

The card-drop P is an arm that projects upwards from the rock-shaft Q, which has its bearings on the arms of the nlaten below the frisket-shaft M. On the right-hand (ind of said shaft Q, (observing fig. 3,) is placed a right-angled arm, R, which extends both forwards and backwards from theline of the shaft, itsforward portion beingweighted, as seen at X, in order' to keep the card-drop P against the platen, and its rear portion having a pin which projects horizontally from it, as shown in all the figures, ivhich pin'comes beneath the adjacenteml oi'a tappe t-lever, 8-,. whose rear end is acted upon by a cam, U, formed on the periphery of the adjacent ivheel V. The tappet-lever S is pivoted to the frame of the press at T, and it is so weighted or balanced as to return after the cam U has passed by to its normal positi0n,-its weighted end resting on pin Y.

When the lever S is vibrated by the said cam U, its forward end depresses that part of arm with which it is in contact, and, by yibrating said mun rocks theshaft Q siiflicierrtly to move the card-drop P a little distance from the platen, and thereby let the card, which had been supper d on its edge on the top of said drop, fall thence between the drop and platen to the ground. This motio cam U, and lever S, and arm R, as to take place just asthe platen begins its movement 'away from the form after making an impression.

The several parts that compose my press are so constructed and arranged as toallow the motion of the shaft B to be reversed without any interference with the regularity of its-ope'rations, the only change required being to lengthen the lever S, as shown in red, at S in fig. 1,.so that its left-hand end will strikoagainst the weighted part X of the arm R from below, so as to raisc it and 'rock'the shaft Q, the pin Y at the same time being removed from its present position and placed on the other side of the pivot or centre T.

i The fingers of the frisket are, in practice, removed from shaft M when the card-drop is to be used, and 'uz'ceversa. The bed, on which or against which the form is placed, is shoivnin red, and swung down out of its place in fig. 1 for the purpose of better exhibiting the contiguous parts ot' th'e press.

I disclaim the inventions patented to J. H. Utter, October 20, 1857,;tmlS. A. Adams, -March 8,1853.

What I claim as new, and desire to secure by Letters Patent, is--=- v i 1. The arrangement and combination, with the card-drop I, of the cam U, lever S, and weighted arm R, substantially as described. v

2. I also clain; the supplementary roller E, lying on roller D, and so arranged thercwitlnthat their periphcries on the side towards the roller-frame 'F are in the same vertical tangential line, in combination with the vertically-moving roller'frame F, substantiallyas described and shown.

WM. BRAIDWOOD; Witnesses:

Gnsruv' BERG, Jozm THOMAS MANNING.

js o timed by a proper arrangement of the

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