US664151A - Mechanical movement. - Google Patents

Description

No. e64,|5|. Patented ngc. la, |900.

w. K. HODGMAN.

MECHANICAL MOVEMENT.

Apphcahon led Jan. 21 1898 VY/l,

G, Q 9 Hmmm (No Model.)

UNITED STATES PATENT GEETCE.

WILLIS K. HODGMAN, OF TAUNTON, MASSACHUSETTS.

MECHANICAL MOVEMENT.

SPECIFICATION forming part of Letters Patent No. 664,151, dated December 18, 1900.

Application filed January 21, 1898. Serial No. 667,393. (No model.)

times in parallelism with the faces of the I To all whom t may concern:

Be it known that I,WILLIS K. I-IODGMAN, of Taunton, county of Bristol, State of Massachusetts, have invented an Improvement in Mechanical Movements, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

This invention relates to a mechanical movement which is particularly adapted for use in that type of printing-presses in which the form is carried by a bed having a rreciprocating movement under the impressioncylinder, the bed being driven during the greater portion of its stroke by a rotating gear which meshes alternately with two parallel racks secured to the bed, a reversing device controlling the bed at each end of the stroke and reversing its motion gradually while at high speed.

In another application, Serial No. 658,768, filed by me the 16th day of November, 1897, I have shown a novel reversing mechanism comprising a rotating crank having a roller or stud which enters a straight guideway on a bracket movable with the bed, one of the sides of the guideway being movable to permit withdrawal of the crank roller or stud from or its entrance between them, whereby cramping of the stud is prevented as the reciprocating mechanism begins or ends its control of the bed.

The movable side of the guideway may be arranged to either swing out of the way of the crank-pin or it may move away from the opposite side of said guideway, as in my application referred to, the movement in either case being effected to enable the crank-pin to freely move into or out of the guideway.

It will be obvious that the crank pin, stud, or roller, of cylindrical form in cross-section, presents a very small wearing-surface to engage the straight sides of the guideway, and it is equally obvious that a square or polygonal stud having plane bearing-surfaces would be preferable on account of the greater Wearingsurface which would be presented to engage the shoe, as I will hereinafter term the sides of the guideway. In order to make use of such a stud, however, it is necessary that the engaging surfaces thereof be kept at all shoes; and it is the object of my present invention to provide means for utilizing a crank-stud having plane engaging faces to cooperate with the shoes in a reversing mechanism.

Figure 1 is a cross-sectional view of a sufficient portion of a printing-press to be understood with one embodiment of my invention applied thereto. Fig. 2 is a left-hand side elevation of a portion of the mechanism shown in Fig. l. Fig. 3 is an inner side view of the guide-box shown at the right of Fig. l. Fig. 4 is a transverse sectional view of my invention as applied to another form of bedmovement. Fig. 5 is a left-hand end elevation thereof, and Fig. 6 is a detail to be described.

Referring to Fig. l, the side frame A2, reciprocating bed A3, having parallel racks B and B, the cooperating gear G4 on the shaft F', the-large gear E', fast on the driving-shaft E2, the standard E4, gear E6, and cam G2, fast on the driving-shaft, may be and are substantially as in my said application referred to,cor responding parts having like characters of reference applied thereto. ,As shown in said application, a cam-plate B3 is rigidly secured to the frame of the press and is provided with a cam-groove, (not shown,) which is entered by two crank-pins, one of which, as D2, is shown in Figs. 1 and 2, said crank-pin being rigidly secured to a disk D,rotatable in a carrier-plate C2, rigidly secured to the bed A3, said carrier-plate being broken off, Fig. 2, to show the mechanism behind it, the shoe C, forming a part of said plate,being also broken out. It will be understood that the carrier C2 has at its opposite end a similar shoe and that the second disk, similar to D, is mounted therein.

A movable shoe C3 parallel to the shoe C2 is provided with a horizontal pin or tongue C5, which enters a longitudinal slot in the carrier-plate C2, the disk D having a second crank-pin D4, which enters a vertical slot 2O (see dotted lines) in the body portion of the shoe C3. Remembering that the cam-plate B3 is stationary, that the carrier-plate C2 moves With the bed AS, and that the shoe C3 moves on and relatively to the carrier-plate it will be clear that rotation of the disk D IOO will operate through crank-pin D" to move the shoe C3 toward or from its fellow-shoe C to thereby widen or narrow the guideway between them, all as in my said application.

In my present invention the crank-shaft F3 is made as a sleeve, rotatably mounted in bearings 2 and 4, Fig. l, and having fast thereon a long pinion F2 in mesh with and driven by the gear E0,while a loose collar G3 on the sleeve engages the cam G2 to effect longitudinal movement of thehollow shaft F0, said collar being held in place on the latter by fast collars 5 5. The sleeve F3 has fast thereon at its main end a crank-arm G5, on the inner face of which are rotatably mounted two meshing pinions b c, the pinion b being secured to the end of a shaft 11X, extended through the sleeve F3 and into a bearing-box b', attached to the side frame A2.

As shown in Fig. 3, the bearing-box has a square or polygonal hole b2 to be entered by the correspondingly-shaped extremity b3 of the shaft bX, preventing the latter from rotating, while permitting its longitudinal movement with the sleeve F3, a collar b4, fast on the shaft hX, bearing against the outer end of the sleeve F3. The meshing pinion cis seated in a suitable recess in the crank-arm G5 and rotatable on a headed stud 0X, it being obvious that the movement of the pinion c around the fixed pinion b will effect axial rotation of said pinion c.

A rectangular actuating-block G0, having at its base an attached pinion g, is rotatably mounted on the crank-arm G5 by means of a stud gx, the pinion being in mesh with the intermediate pinion c, so that when the crankarm is rotated in the direction of arrow l2, Fig. 2, the pinion g and actuating-block G0 will be rotated axially in the opposite direction. The pinion g is of the same diameter as the pinion b, hereinbefore referred to.

The axial rotation of the block Gf will have the eect of maintaining its parallel bearingfaces 7 and 8 in parallelism with the inner faces of the shoes C C3, so that the entrance or departure of said block from the guideway formed by the shoes will be readily effected by longitudinal movement of the hollow shaft F3. It will be seen that the plane engaging faces of the block give extended wearingfaces, which tend to steadiness and accuracy of operation of the parts with increased power, and so long as the wearing-faces are maintained in proper position relative to the shoes their size may be increased as desired. When the bed arrives at the end of its reciprocation due to the rack and gear, the actuating-block G0 is in the vertical guideway and operates to complete the stroke, gradually and rapidly reverse the direction of the bed, and return it to the point at which the rack-and-gear motion again comes into operation. The end of the movement of the actuating-block G0, during which the bed is under the control of the reversing mechanism, is shown in Figs.

1 and 2. Now to enable thc said block to easily enter between the shoes and also to leave it without cramping at the beginning and ending, respectively, of the control by the reversing mechanism one shoe is made movable relative to its fellow to get out of the path of the block by widening the space between them at such times and thereafter to be held in relatively-fixed position during reversing or by a swinging movement of one shoe when the crank-arm and block have no movement in the direction of the length of the crank-shaft.

In Figs. 4, 5, and 6 I have shown a modification of my invention applicable to a press wherein the shoehas a swinging movementsuch, for instance, asin United States Patent No. 322,309, dated July 14, 1885. The rackdriving gear DX is mounted on a hollow shaft or sleeve D10, rotatable in suitable bearings I, substantially as 'in said patent, the shaft being rotated by means of a pinion K fast thereon. The sleeve is raised and lowered by suitable devices to bring the gear DX into alternate engagement with two racks (not shown) above and below it and carried by the bed of the press. A shaft fX, extended through the sleeve D10, has secured thereto adjacent the outer face of the gear DX a pinion f, the other end of said shaft being shown as squared at f to enter a slot 7L in the head of a standard H, said slot being shown in Fig. 6 as slightly inclined to correspond with the path of the movement of the sleeve D10 when it is raised and lowered. The shaft fX is thus held froln rotation while the sleeve is free to be rotated. An intermediate pinion on, in mesh with pinion f, is rotatably mounted on a suitable stud mX, carried by the gear DX, and on a foot d10, secured to said gear, is attached a pin nX, on which is rotatably mounted the actuatingblock G10, having an attached pinion n in mesh with the intermediate m, the pinion n being of the same diameter as the pinion f. When the gear DX is rotated, the parallel bearing-faces of the block G10 will thus be maintained in parallelism with the coperating faces of the shoes, (not shown,) one of the shoes being adapted to be swung to one side in the patent referred to to remove it from the path of the block when the latter is about to enter or leave the guideway between the shoes. A collar f2 on the end of the shaft f X outside of the standard H prevents longitudinal movement of said shaft.

I have shown two applications of my invention, and it will be obvious that I am not restricted to the particular means employed for permitting the entrance and departure of theactuating-block from between the shoes at the beginning and end of the reversing movement, the gist of my invention consisting, essentially, in the use of a plan e-faced actuating-block and means for maintaining it in proper position relative to the devices with which it intermittingly cooperates.

IOO

IIO

Having fully described my invention, what I claim as new, and desire to secu re by Letters Patent, is-

1. In a bed-motion for printing-presses wherein the bed is reciprocated, a guideway carried by and at right angles to the bed, a reversing member movable in a circular path and having a plane bearing-face, to coperate intermittingly with said guideway,and means to position the bearing-face of said member to enter the guideWay.

2. In a reversing mechanism, a reciprocating member, a guideway mounted thereon, a reversing member movable in a circular path and having a plane bearing-face, to coperate intermittingly with the guideway, and means to position the bearing-face of said member to enter the guideway.

3. In a reversingmechanism, a reciprocating member, relatively movable shoes carried thereby to form a guideway, areversing member movable in a circular path and having parallel plane bearing-faces, to enter said guideway intermittingly and cooperate with the shoes, means to position the bearing-faces of said reversing member to enter the guideway, and means to eect relative movement of the shoes to permit the entrance to and departure of the reversing member from the guideway.

4f. In a reversing mechanism, a rotating carrier, a rotatable reversing member mounted eccentrically thereon and having a plane bearing-face, a member to be reversed, with which the reversing member engages intermittingly, and means to effect axial rotation of said reversing member during the movement thereof in a circular path t0 thereby maintain the bearing-face in parallel planes throughout the circular path andan position to cooperate with the member to be reversed.

5. In a reversing mechanism, a revolving carrier, a rotatable plane-faced reversing member mounted thereon and having an attached pinion,alixed pinion centrally mounted relative to the carrier,and an intermediate pinion rotatable on the carrier and in mesh with said fixed and reversing-member pinions, to effect rotation of the said member relatively to the carrier as the latter revolves.

6. In a printing-press, a reciprocating bed and parallel guideways carried thereby, means to reciprocate the bed, and reversing mechanism for the bed, including a planefaced actuating member movable in a circular path, means to maintain the acting faces thereof in parallelism with the guideways, with which latter it cooperates alternately to reverse the bed,and means to move the reversing member into and out of said guideways at the beginning and ending of the reversing movement.

7. In a reversing mechanism, a rotatable hollow shaft or sleeve, a crank-arm carried thereby,a stationary pinion adjacent the face of said arm and mounted on a Xed shaft eX- tended through the sleeve,an actuating member having an attached pinion and rotatable on said crank-arm,said member having plane acting faces, and an intermediate pinion rotatably mounted on the crank-arm and in mesh with the fixed and actuating-member pinions, to maintain the plane faces of said member parallel to a fixed plane throughout the revolution of the crank-arm.

8. In a reversing mechanism for printingpresses wherein a bed having attached parallel guideways at the ends thereof is reciprocated, a rotatable, longitudinally-movable shaft, a crank-arm thereon, an actuating member rotatably mounted thereon and having parallel acting faces,means to move the sleeve longitudinally to effect cooperation of the said member intermittingly with the guideways, and means mounted on the crankarm to maintain the faces of the actuating member in parallelism with the guideways throughout the revolution of the crank-arm.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WILLIS K. HODGMAN.

Witnesses:

GEORGE WA'rrs, E. A. HoDeMAN. g

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