US1587513A - Cylinder safety means - Google Patents

Description

June 1926.

1,587,513 E. F. DUDLEY CYLINDER SAFETY MEANS Filed Feb. 26, 1923 2 Sheefs-Sheet 1 June 8 1926.

mmunmz 1,587,513 E. F. DUDLEY CYLINDER SAFETY MEANS Filed Feb. 26, 1925 2 Shets-Sheet 2 &

Patented June 8, i926.

UNE'E'ED EDWARD F. DUDLEY, 6F OAK PARK, ILLINOHE. ASSIGNQR PRESS & MANUFACTURING 00., OF CH NOIS.

TO MIEHLE PRINTING ICAGO, ILLINOIS, CORPORATION OF ILLI- CYLINDER SAFETY MEANS.

Application filed February This invention relates to printing presses and more particularly to safety means for the printing cylinder.

In a co-pending application, Serial No.

546,566, filed jointly on March 25, 1922, by

Burt D. Stevens and me, there is disclosed a vertical type of printing press in which the printing cylinder, during an upward rectilinear movement, is connected to driving means for rotating the cylinder for printing purposes. On the downward rectilinear movement of the cylinder, the latter is held against rotation. Accordingly, means are provided, first, for connecting the cylinder to its rotary driving means preparatory to an upward movement of the cylinder, and, second, for disconnecting said cylinder from said rotary driving means, and holding the cylinder against rotation preparatory to its next downward movement.

With the arrangement disclosed in said copending application, it is a mechanical possibility for the cylinder to become disconnected from its rotary driving means during its upward rotative or printing movement. Such an occurrence would be undesirable for it would cause a sliding movement of the type with respect to the sheet material being impressed, spoiling said sheet if not doing other damage. I

Accordingly, one object of this present in- Y vention is to prevent the printing cylinder from becoming unlocked from its rotary driving mechanism during its printing move ment.

Another object is to provide simple and efficient means, not only for the above mentioned purpose but also to provide such means which will permit rotative movement of the cylinder to facilitate adjustment of the tympan.

These and other objects are accomplished by means of the arrangement disclosed on the accompanying sheets of drawings, in which Figure 1 is a fragmentary elevational view of a vertical type of printing press embodying my invention;

Figure 2 is a fragmentary elevational view of a printing cylinder embodying the invention, parts being shown in section for the sake of clearness;

Figure 3 is a fragmentary sectional view taken in the plane of line 3-3 of Figure 2;

as, 1922. Serial miseries.

Figure 4 is a sectional view taken in the plane of line 4-4 of Figure 3;

Figure 5 is a sectional view taken in the plane of line 55 of Figure 2; and

Figure 6 is a fragmentary sectional view similar to that shown in Figure 3, and showing, in addition, a dog or pawl connection between the cylinder and its actuating mechanism.

The various novel features of the inven tion will be apparent from the following description and drawings and will be particularly pointed out in the appended claims.

As in said co-pending application, my present invention is illustrated in connection with avertical type of printing press including a base frame 10 and a way frame 11 mounted upon the former. Vertically movably mounted in the way frame is a type bed, not shown, fpr carrying type or a plate 1:or cooperatingwlth the printing cylinder 12. In this particular instance, the type bed and printing cylinder reciprocate vertically simultaneously in opposite directions, as shown in a co-pending application Serial No. 329,976, filed by Edward Cheshire on October 11, 1919, the cylinder 12 being rotated during its upward or printing movement and being held against rotation during its downward movement.

In connection with the actuation of the printing cylinder 12, a rack 13 reciprocates with the type bed, and a gear 14, associated with the cylinder 12, meshes therewith and is driven thereby. The driving gear 14 is loosely or rotatably mounted upon any suitable support or trunnion 15. It is apparent therefore, that gear 14 may be rotated as a result of a relative movement with respect to the rack 13 Without rotary movement being transmitted to the cylinder proper. To rotate the cylinder, a positive connection between said cylinder and gear is necessary. This positive connection takes the form of a pawl 16 having a head 17 adapted to pass into the single notch 18 of a ratchet wheel 19. lhe ratchet wheel 19 is secured to, or is formed integrally with, the driving gear 14, and the pawl 16 is fixed to a shaft 20 carried between the end walls of the cylinder, eccentric with respect to the longitudinal center of said cylinder. Accordingly, when the pawl head 17 is held in the notch 18 of the disc 19 and the cylinder is travelling vertically, said cylinder also is caused to rotate. The pawl is pressed against the annular edge of the ratchet wheel 19 and more particularly, the pawl head 17 is pressed into and held in the notch 18 of the disc 19 by a spring 21, which coiled around a suitably supported rod 22 having a pivotal connection with an arm 23, secured to the shaft 20.

As mentioned above, so long as the pawl head 17 remains in notch 18 of the disc 19, and the cylinder is moving upwardly, sai d cylinder also will be caused to rotate. it is conceivable that during the upward rotative or printing movement of the cylinder, said cylinder might become disconnected from its driving means or, in other words, the pawl head 17 might be thrown out of the notch 18, as, for example, if the cylinder should momentarily run faster than the driving gear 14. The cooperating beveled walls 24 and 25 of the notch 18 and pawl head 17 would permit such action, such beveled walls being provided for the purpose of causing the ready disconnection of said pawl head and notch at the upper limit of movement of said cylinder. If the cylinder should become disconnected from its rotary driving means during its upw rd printing movement, it is apparent that the type or plate would slide over the sheet of material carried by the cylinder, spoiling such sheet and possibly doing other damage. Accordingly, to prevent said cylinder from being disconnected from its rotary driving means during its upward rotative movement, I have provided positive means for locking said pawl head 17 in the said notch 18 during such upward rotative movement of the cylinder. This means takes the form of a collar 26 having an annular laterally extending flange 27, which cooperates with a roller or stud 28 projecting laterally from an arm 29, also secured to the shaft 20. The flange 27 has a single notch 80 through which the roller or stud 28 may pass inwardly when the pawl head 17 is raised out of the notch 18 at the upper limit of movement of the cylinder. The stud 28 remains within the flange 27 during the downward movement of the cylinder but does not rotate with respect thereto for the reason that the cylinder is notv rotated and the collar 26 carrying the flange 27 is fixed against rotation on part of the cylinder bearing brack t or frame structure, However, when the cylinder has reached its lower limit of movement and is about to start on its upward printing movement, the pawl head 17 passes into the notch 18 and accordingly, the stud 28 moves outwardly through the opening 30 in flange 27. As the cylinder rotates under these conditions, that is, 'ith the stud 28 to the outside of the flange 27, it is apparent that it would be impossible for the pawl head 17 to move out of the notch 18 to disconnect the cylinder from its driving mechanism for the reason that the flange 27 will not permit an inward movement of the stud 2-8 until the cylinder has completed its upward rotary printing movement and the stud again is presented to the opening 30.

The stud 28 is permitted to rotate within the flange 27 when the cylinder is disconnected from its driving means for the purpose of facilitating the adjustment of the tympan. That is the only time, however, that the stud 28 rotates within the flange 27.

It is my intention to cover all modifications of the invention falling within the spirit and scope of the following claims.

I claim 1. In a printing press, the combination of a cylinder mounted for rotary movement, driving means therefor, means for connecting said cylinder and driving means, and unyielding means for positively preventing said connecting means from moving from its connecting position during a rotary movement of said cylinder.

2. In a printing press, the combination of a cylinder mounted for rotary and another movement, driving means therefor, means for connecting said cylinder and driving means whereby said cylinder may be rotated, and unyielding locking means for preventing said connecting means from moving from its connecting position during a rotary movement of said cylinder.

3. In a printing press, the combination of a cylinder mounted for rotary and rectilinear movement, driving means therefor, means for connecting said cylinder and driving means, and means including an unyieldingly locked member whereby said connecting means is positively held to prevent it from moving from its functioning position during a rotary movement of said cylinder.

4. In a printing press, the combination of a cylinder means whereby said cylinder may be moved in one direction and rotated while moving in said direction, and unyielding locking means making it impossible for said cylinder not to rotate while moving in said direction.

5, In a printing press, the combination of a cylinder capable of rotary and another movement, means whereby said cylinder moves in one direction and does not rotate while so moving, means whereby said cylinder rotates while moving in another direction, and unyieldably locired means making it impossible for said cylinder not to rotate when moving in said other direction.

6. In a printing press, the combination of a printing cylinder, a driving member therefor, a ratchet and pawl connection between said cylinder and driving member whereby said cylinder may be rotated, and means including two members in unyieldable engagement for positively locking said ratchet and pawl in functioning position during an operating movement of said cylinder.

7. In a printing press, the combination of a cylinder, a shaft carried by said cylinder, a pawl mounted on said shaft, a driving gear relatively movable with respect to said cylinder and operatively associated with said pawl whereby when said pawl is in a given position said cylinder may be rotated, and means including unyieldably interlocked members for positively preventing said pawl from moving into a non-functioning position during a rotative movement of said cylinder.

8. In a printing press, the combination of a cylinder, a shaft carried by said cylinder, a pawl mounted on said shaft, a driving gear relatively movable with respect to said cylinder and operatively associated with said pawl whereby when said pawl is in a given position said cylinder may be rotated, a flanged member, and an arm mounted on said shaft cooperating with said flanged member to hold the pawl in locked position for preventing the cylinder from not rotating during a printing movement thereof.

Signed at Chicago, Illinois, this 21st day of February, 1923.

EDWARD F. DUDLEY.

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