US237254A - Device for giving positive motion to sliders of printing-presses - Google Patents

Description

( Q J H. ORANSTONi Device for Giving Positive Motibnto Sliders of Pri-nting Presses. NO. 237,254. Patented Feb. 1,188].

UNITED STATES PATENT OFFICE.

JOHN H. CRANSTON, OF NORWICH, CONNECTICUT.

DEVICE FOR GIVING POSITIVE MOTION TO SLIDERS 0F PRlNTlNG-PRESSES.

SPECIFICATION forming part of Letters Patent No. 237,254, dated February 1, 1881.

Application filed June 8, 1880.

To all whom it may concern:

Be it known that I, JOHN H. GRANSTON, a citizen of the United States, residing at Norwich, in the county of New London and State of Connecticut, have invented certain new and useful Improvements in Printing-Presses and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

This invention relates to an improvement in the means employed for giving to the reciprocating sliders of printing-presses a steady, regular, positive'movement as they move back and forth upon the ways, and this object is accomplished by attaching to the bottom of the bed one end of a series of connected levers, the opposite end of said series being connected with the frame of the press and the center thereof attached to the slider.

In the drawings, Figure 1 is a vertical section through the bed and frame on the line was of Fig. 2. Fig. 2 is a plan, and Figs. 3 and 4 show enlarged views of parts of the machine.

The frame which carries the operating parts of the press may be formed of a bed-plate, A, carrying two side frames, B B. Projecting inward from these side frames are the supports a a, which carry the channeled or grooved ways C C, and are connected to each other by the cross-bars b b, the whole forming a sub stantial framing for the support of the operative mechanism.

Within the channels of the grooved ways are placed the sliders D D, which consist of channel-bars having an H-shaped section, and of suflicient length to always remain under and support the whole length of the bed E during its reciprocations.

Mortises are formed through the web which connects the two side flanges of the sliders, in which are placed a series of rollers, c, of slightly less diameter than the depth of the slider, but so pivoted within the mortises that their peripheries shall project sufficiently be low the lower edge of the slider as to keep it clear of the bottom of the grooves in the ways C and sufficiently below the upper edge of the flanges of the sliders as to leave a channel for the reception of the, guide projections d upon the bottom of the bed.

(No model.)

It will thus be seen that the bed is supported during its reciprocations wholly by the rollers c in the sliders, the. latter serving, by

means of their flanges, to prevent lateral mo-,

tion of the bed.

Attached to the under side of the slider D, on one side of the press, and projectingdownward therefrom, is the lug F, near the lower end of which is pivoted the center of a series of links, 6, and levers 0. One end of the series is secured by a pivotal connection to the stud I, which is, in turn, secured to one of the ways C, and the. other end to the lug F, projecting downward from the bed E. It is obvious that more or less of these links 0 and levers 6 may be employed, if desired, and that they may be attached at one end to any part of the reciprocating bed and at the other to any stationary part of the press, the center of the series being attached to the slider, which will allow them to have their proper movements. The object sought in their use is to give a positive and steady motion to the sliders, and through them to the bed, which is actuated by suitable power in any well-known manner.

The sliders D D are connected by meansof a bar, which is secured firmly at one end to one of the sliders and engages with the other by means of a mortise formed therein, whereby the sliders are caused to move together.

I am aware that the sliders provided with a series of rollers for reducing the friction of the reciprocating bed have been heretofore used, and that a series of levers have also been used to give a regular motion to the bed. I do not therefore claim the same as myinvention; but

What I do claim, and desire to secure by Letters Patent, is-- In a printing-press, the combination of the reciprocating bed, the sliders provided with a series of rollers, and the system of links and levers connecting the bed and the sliders with the press-frame, substantially as shown and described.

In testimony whereof I afflx my signature in presence of two witnesses.

JOHh H. CBANSTON.

Witnesses:

LUoIUs BROWN, LYDIA W. HoUGH.

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