US318364A

US318364A - Dampening apparatus for lithographic presses

Info

Publication number: US318364A
Authority: US
Publication date: 1885-05-19
Anticipated expiration: 1902-05-19

Description

(No Model.) 2 SheetsSheet 1.

G. P. FENNER.

DAMPENING APPARATUS FOR LITHOGRAPHIG PBESSES. 7 No. 318,364. Patented May 19, 1885..

N. PETERS. Phme-mhogn hu, Wnhin mn. 0.;

2 Sheets-Sheet 2.

(No Model.)

G. P. PENNER. DAMPENING APPARATUS FOR LITHOGRAPHIG PRESSES No. 318,364. Patented May 19, 1885.

Fzjw?" NY PETERS. Fhola-Lrlhogmpher, Washingicn. D C.

UNITED STATES PATENT OFFICE.

GEORGE P. FENNER, OF NE\V LONDON, CONNECTICUT.

DAMPENING APPARATUS FOR LITHOGRAPHIC PRESSES.

SPECIFICATION forming part of Letters Patent No.3l8,364, dated .May 19, 1885.

Application filed May 22, 1884. (No model.)

To aZZ whom it may concern Be it known that I, GEORGE P. FENNER, a citizen of the United States, residing at New London, in the county of New London and State of Connecticut, have invented new and useful Improvements in Dampening Apparatus for Lithographic Presses, of which the following is a specification.

This invention relates to apparatus for dampening the stone of lithographic-printing presses; and it consists in certain novel features of construction, hereinafter described in the specification and claims, whereby the supply of water to the stone can be regulated with nicety.

In the accompanying drawings, Figure l is a side View, partly in section, of a portion of a press embodying my invention. Fig. 2 is a vertical cross-section thereof in the plane .00 m, Fig. 1. Figs. and 4c are detail views of parts on a larger scale than the preceding figures.

Similar letters indicate corresponding parts.

In the drawings, referring at present especially to Figs. 1 and 2, the letterA designates the press-frame, having suitable bearings, a, for the impression-cylinder B, and suitable guideways (not shown) for the traveling bed K. At one end of the frame is arranged the driving-shaft C, from which motion is transmitted to the main shaft D, and from this shaft motion is inturn transmitted through the medium of the usual. crank, D, and connecting-rod D tothe rack-wheel D which gears into two racks, 13* 1)", one fixed to the base of the press and the other to the traveling bed B, for imparting a reciprocating motion to the latter in the usual manner. The traveling bed B carries thelithographic stone b, and in proper relation thereto are arranged dampening-rollers Q, for wetting the stone, water being conveyed to these rollers by takingroller Q, from a feed-roller Q", which is arranged in a reservoir, Q", to receive a revolving motion. The taking-roller has its bearing at one end in a pivoted arm, q, Fig. 2, and at its other end in one arm of the lever Q, and

the feed-roller Q has similar hearings in the pivoted arm q and in one arm of the lever The levers Q} and Q are pivoted to the frame at c, and connected with cams R 1% on the counter-shaft R the latter being geared with the driving-shaft by a worm, R, and a wormwheel, R, or other suitable device, to receive a revolving motion, so that by the action of one of the cams, R, the required motion is imparted to the taking-roller Q from the feedroller Q", and vice versa, while by the action of the other cam, R, a motion is imparted to the feed-roller toward and from the takingroller. The cams R R are adjustablysecured to the counter-shaft R by means of set-screws c 0, so that their throw or lead can be Varied by rotating them in the proper direc' tion and then screwing up on the set-screws. It will be observed that by varying the throw or lead of the cams the contact of the takingroller Q with the feed-roller Q, may be varied to the greatest possible extent for determining the supply of water to the stone.

To engage the cams R R, the connectingrods Q" Q are each provided with a rollerstud, R each rod being, moreover, bifurcated at the lower end to straddle the counter-shaft R as shown in Fig. 2. Motion is transmitted to the feed-rollers Q? from a suitable part of the press by means of a belt running over a pulley, S, Figs. 2 and 3, mounted on the feedroller shaft. This pulley S is loose, and adjacent thereto is a clutch, S, having a projection, cl, which clutch is keyed to the rollershaft to slide thereon toward and from the pulley, and the projection thereon is adapted to engage a socket, S, of said pulley, so that when this clutch is properly adjusted it on' gages the pulley, thus causing the roller-shaft and roller to share its motion, while these parts may be left stationary, when desirable. The outward movement of the clutch S is stopped by a shoulder, i on the end of the roller-shaft.

By the means just described it is rendered possible to entirely stop the flow of water to the stone when so desired, as it is evident that when the l'eedroller Q ceases to rotate, which is the case when the clutch S is thrown out of engagement with the pulley S, there can be no water transferred to the taking-roller.

VhatI claim as new, and desire to secure by Letters Patent, is

1. The combination of the dampening-rollers, the feed-roller, the taking-roller, the le vers Q Q and the pivoted arms (1 q, forming the bearings for the feed-roller and takley, substantially as and for the purpose set 10 ing-roller, the counter-shaft, and the adjnstforth.

able cams of said counter-shaft,which engage In testimony whereof I have hereunto set the levers, substantially as and for the purmy hand and seal in the presence of two subpose specified. scribingwitnesses.

2. The combination, with the feed-roller, of GEORGE P. FENNER. [L s.] the driving-pulley mounted loosely on the Witnesses: roller-shaft, and the sliding clutch keyed to the shaft and constructed to engage the pul- EDWARD T. BROWN; GEORGE COLFAX.