US1032126A - Bed-motion for printing-presses. - Google Patents

Description

M. A. DROITGOUR.

BED MOTIONPOR PRINTING PRESSES.

APPLIUATTON FILED MAR. 14, I911.

ML A DRUITGOURQ BED MOTION-'56}; PRINTING PRBSSES.'

APPLICATION FILED MAR. 14, 1911.

'- Patented July 9, 912.

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M. A. DROITGOUR. BED MOTION FOR PRINTING PBES SES. APPLICATION FILED MAR. 14, 1911.

L32,12& Patented Ju1y 9, 1912.

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M. A. DROITOOUR. BED MOTION FOR PRINTING PRESSES.

APPLICATION H'LB'D MAR. 14,1911.-

' Patented July 9, 1912.

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1&323126;

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MICHAEL ANDREW DROITCOUR, OF- OAK PARK, ILLINOIS, ASSIGNOR T0 IVIIEHLE PRINTING PRESS-AND MANUFACTURING COMIPANY, OF CHICAGO, ILLINOIS, A

CORPORATION OF ILQINOIS.

, BED-Morton FOR PRINTING-PRESSES.

Specification of Letters Patent.

r sented J i e, iota;

Application filed March 14, 1911. Serial Nb. 614,498.

To all whom it may concern: 1

Be it known that I, MICHAEL A. DRo1'r-.

coon, of Oak Park, in the county of Cook and Stateof Illinois, have invented cert. in new and useful Improvements in Bed-Motions for PrintingPresses; and I hereby declare thatthe following is a full, clear, and

exact description thereof, reference being,

had to the accompanying drawings, which form. part of this specification.

This invention is an improvement in means for converting rotary into reciprocating motion, andis particularly adapted for reciprocating the type beds of bed and cylinder printing presses. y

The particular object of the invention is to provide novel means for driving the bed at a uniform speed of movement during part of each stroke, and for reversing the motion of the bed at the end of each stroke, by novel means by which the bed will be slowed down, stopped and started back with accelerating speed until it-is again moving at the full speed of the uniform driving means; the uniform driving means and the without shock or jar.

In this invention the bed is directlydriven and reversed by means of a single bed-driving gear engaging a rack on.the bed; novel means being provided for driving the gear in either direction at uniform speed; and for slowing down, stopping and reversing the motion of such gear, so as to similarly affect the bed.

The presentinvention therefore comprises novel means for driving the bed driving gear alternately in opposite directions at full speed; novel means whereby such gear is slowed down, stopped and its motion reversed independently of the means for driving said gear at uniform speed; the means for slowing down and reversing the rotation of the bed driving gear has control of such gear while the mechanism for uniformly rotating, said gearhas lost control thereof; and the proper mechanism for uniformly rotating the gear has control of the hed-driving-gear when the reversing mechanism has lost controltheredf; the parts the proper actuating mechanism,

The invention is adaptable for use in suitable driver.

many machines where 'it-is'de sired to convert rotary into reciprocating motion. 1 will describe it in detail as used for reciprocating the beds of printing presses, and it can be readily adapted-to other machines by those skilled in'the art.

In the accompanying drawingsFigure 1 is a conventional side elevation of parts of a printing press provided withmy invention. Fig. 2 is an end view of Fig. 1. Fig. 3 is a plan view of the movement; partly in section. Fig.4 is a detail view showingthe pinions shifted outward to bring pinion 8 into positionto engage gear 2. Fig. 5 is'a;

diagrammatic view indicating the reversal view indicating the reversal of the bed at the right hand end of its stroke.

The machine to which the invention is ap plied may be of any desired usual construction and a printing press is simply conventionally illustrated in the drawings.

On the shaft ofthe cylinder C is a gear 1 which" meshes .with a gear 2,mou nted loosely upon a countershaft 6. Gear 2 isdriven by means of a'pinion 3 mounted upon a shaft 3 to.which power may be applied by belt pulleys or gearing (notshown) from any Gear 3 also .meshes with a gear 4 keyed on a crank shaft 5, hereinafter referred to;

A short shaft 9 is mounted in one of the adjacent side frames F and a bracket F attached thereto, .(Figs. 1 and 2) and on this shaft 9 are slidably mounted three pinions 8, 7 and 11, Pinion 8 maybe shifted facewise on "shaft 9 by any suitable means. As shown the hub of gear 8 has an annular groove 8 which is engaged by an arm 8 on a bar 8 which is slidablysupported in the side f'rameF and bracket F, and is shifted at the proper-time, as hereinafter explained.

The pinion 8 is continually in mesh with ,gear2.

' The pinion 7 is rigidly connected with pinion 11 but spaced aparttherefrom. Pin; ion 11 continually meshes with a gear 10 keyed on shaft-3. The pinions 7 and 11 might be formed integral and revolve as one piece. The pinions 7 and 11 rotate independently of pinion 8 but may be caused to iiiove facewise onthe shaft 9 by means of a finger 8 on bar 8 engaging an annular groove 11 in the hub of pinion 11.

, When shaft3 is driven in the proper .di- 'rection pinion, 8 will constantly revolve clockwise; while pinions 7and 11 will revolve' counter-clockwlse. In other words gear 2 is. driven by gear 3 on shaft 3 con stantlyfcounter-clockwise, and in turn drives inion 8 constantly clockwise; while gear 10 on shaft 3% drives the pinion 11 (and 7) constantly counter-clockwise when the machine ,i's 'in operation.

gear 2 is keyed on shaft 6 beside gear 5 flf Geai 2 is alternately driven by pinions 7 and 8; which latter are shifted alternately into meshwith 'gear 2, as hereinafter de-? scribed and consequently as pinions 7 and 8 rotate in opposite directions the gear 2 will be alternately drivenin opposite directions. The gear2f will thus turn shaft 6 alternately in opposite directions, and drive the bed alternately in opposite directions.

On shaft'6 iskeyed a gear'12 which'meshes with a rack 13 on the underside of the bed B and consequently when pinion 8 is driving gear 2", the bed will be moved in one direc tion; and when pinion 7 isdrivinggear-Q -.the bed"w ill;.be moved in the opposite direc- 3 .tioir f The" gear 2isa' segmental gear, its teeth being removed or cut away for about 120,

or one-third theicircumference of the gear as shown'at 2 Pinion 8 is of such width that-when the pinions 8, 7 ,.11 are shifted outward- (to the positionv shown in Fig. 4) --pinion 7 is out of position tomesh with gear 2'fand pinion Sis in position-to mesh with both gears 2 and 2; and consequently will transmit motion from gear 2 to gear 2' and cause gear 2'-to rotatevwith, and in the same direction as, gear 2. When the pinions 7, 8,11 are shifted inward to the position indicated in Fig. 3' pinion 8 is moved out of position to mesh with gear 2, and pinion 7 is brought into position to mesh therewith, and consequentlywillj drive gear 2 in a direction opposite to't'he rotation of gear 2.

, Pinion S'prefe'rably drives'gear 2 while the bed is making its impression .stroke; and

. pinion 7 drives gear 2' while the bed is making its return stroke.

, While the b dis being driven from and by the rotation" of gear 2', as described, it is moved at substantially uniform speed; but gear 2 loses control of thejbed when the teeth of pinion 7, or 8, enter the gap 2 of gear 2' and while gap 2 is opposite pinions 7 and 8 the latter-are shifted laterally on shaft 9; and at such times the bed is under the control of. the vreversing mechanism whichjslows down, stops and starts the bed in opposite directions and accelerates its speed untilgear 2 and pinions 7 and '8 are tur i g at the same peripheral speed, and

when gear 2 again comes into mesh with pinion 8, 01-7, it will be turning in the proper direction and at the pe'ripheral speed of said pinion, so that the proper pinion 8,

or 7, will come into mesh with gear 2 with- The pinions 7 and 8 may. be shifted at theproper times during the reout clash.

pinions 7 and 8; the movement ofthe bed is reversed by the following means:

r The reversing mechanism.A toothed segment 16 may be fast to gear 12, or to the shaft 6 beside gear 12. This segment-is about 120 in extent, and during the reversal periods isadapted to engage with a rack 15 on a sliding bar 15?, which is guided in suitable supports in the mainframe, and has a Scotch yoke head 15 on oneend provided with a vertical slot 15 which is engaged by a crank pin or roller 14 ona crank 14 attached to the shaft 5; which is driven by gear 4: from gear 3 as above described. The

parts are so arranged that the segment 16 I and rack 15' will have control of the gear 12 while the gear 2' is out of mesh withboth pinions 7Jand 8; and the segment 16 and rack 15 surrender control of the bed when pinion 7, or 8,'comes into mesh with gear 2'. In the example shown in the drawings the parts are so proportioned that the bed driving gear 12. will be driven about twoa thirds of a revolution in one direction while gear 2' is in mesh with pinion 7; then as pinion 7 enters gap 2* in ear 2 segment 16' v comes into mesh with rac; 15'; and the bed I 9 is reversed by the segment and rack. Dur

ing this periodof reversal pinions 7'and 8 .1

are shifted facewise on shaft 9, so as to bring pinion 8 into position to mesh with gear 2, and when the segment and rack lose control of the bed, gear 2 and pinion 8 continue to drive the bed on its printing stroke until pinion 8 again runs into gap 2 of gear 2; at which moment segment 16 and rack15 again take control of the bed, and reverse the motion of the bed while the pinions 7,

and 8 are being shifted so as to bring pinion 7 into position to mesh with gear 2' at the end of such reversal period.

In the example shown, the rack bar caused to make three complete reciproca tions for each reciprocation of thebed. In otherwords shaft 5 is geared to rotate three times to every two revolutions of the shaft .6.

In the example shown in the drawings, the parts are so proportioned that the bed.

. '80 2 beside and fast to the gear 2. During the r timethat the gap 2 in gear 2 is passing the said saga-a pair of oppositely rotating driven pinions'at one. side of said shaft, and means whereby said pinions may be alternately caused to mesh with .the gear keyed.-

to said shaft; with asegri ien't on'the shaft anda reciprocating rack bar adapted to re-' verse the rotation of the shaft while both pinions are disengaged therefrom.

I 2.- In combinat1on, a reciprooatingbed, a rack attached thereto, a -bed driving gear, a shaft carrying said gear, a gear keyed on said shaft, a driven gear loose on said shaft,

1 beside the latter gear; aisecond driven gear and oppositely rotating pinions adapted to transmit motion from the respective driven gears to the gear keyed on the shaft; with means for shifting said pinions so as to alternatelyengage them with the said keyed shaftcarrying said gear, a gear keyed on.

gear; 3; In combination, a reciprocatlng bed, a \rack attached thereto, a bed driving gear, a

" said shaft, ,a driven gear loose on said shaft l ed to transmit motion from thedriven gears beside the latter gear; asecond driven gear, a pair ofopp'ositely rotating pinions adapt'.

to the gear keyed on the shaft; and means for shifting said pinions alternately into mesh with the said keyed gear; with means for reversing the rotation of the shaft while the pinions are not in control thereof.

-4.. In combination, a shaft, a gear keyed to-said shaft, a pair of oppositely rotating pinions at one side of said shaft adapted to be alternately engaged with the gear keyed on said shaft, said gear being provided with a gap to permit lateral shifting of the pinions, and mean's'for shifting the pinions while the gap *is adjacent them.

5. In combination, a shaft, a gear keyed to said shaft; a pair of oppositely rotating pinions at one side ofsaid shaft adapted to, be alternately engaged with 'the gear keyed'on said shaft, said gear being provided with a gap. to permit lateral shifting of the'pinions; with meansffor reversing the j rotation of the shaft while both pinions are disengaged-from said gear, and means for shift-ingthepinions while the gap is adjaa rack driving gear, a shaft carrying said gear, a gapped gear keyed on said shaft, and

a pair of oppositely rotating pinions at one side of said shaft' respectively adapted to transmit motion tothe said. gapped gear; with means'for reversing the motion of the shaft while the pinions are out of mesh with the segmental gear, and means for shifting said pinions when the gap is adjacent them.

8. In combination, a reciprocating rack, a rack driving gear, a shaft carrying said gear, a segmental gear keyed on said shaft,

and a-pair of oppositely rotating pinions respectively adapted to transmit motion to. 'the'said segmental gear; with means for reversing the motion of the shaft comprising a segment on the shaft,"and a crank actuated rack bar adapted to be engaged by the seg- -ment while the pinions are out of mesh with the segmental gear.

9. In )mbination, a reciprocating rack, a rack driving gear, a shaft carrying said a loose driven gear on said shaft besidethe gear, asegmental gear keyed on said shaft,=

segmental gear; a second driven gear, and I a pair of oppositely rotating pinions respec tively adapted to transmit motion fromo of the driven gears-to the said vgsegm'e-n'tga f gear; wit-h means for reversing the motion off-the shaft while the pinions are out of mesh with saidsegmental gear.

10; In combination, a reciprocating rack,

a rack driving gear, a shaft carrying sa d gear, a segmental gear keyed on said shaft,

a loose driven gear on said shaft bes'idefthe 5- segmental gear; a second driven gear, and

a pair of oppositely rotating pinions re- .spectively adapted to transmit motion from oneof the driven gears, to the said segmental gear; with meansfor reversing the motion of the shaftscomprising a segment on the shaft, and a crank actuated rack bar adapted t to be engaged by the "segment while the pinions are out of mesh withsaid-segmental gear. 7 11. Means for reciprocating type beds comprising a rack attached to the bed, a

bed driving gear engaging the rack, a shaft carrying said gear, a segmental gear keyed on said shaft, and oppositely rotating pinions adapted to transmit motion to the segmental gear, said segmental gear being pro-.,

vided with a gap to permit the shifting of the pinions without clash; with means for. shifting saidintermediate pinions so as to alternately drive the said segmental gear, and meansfor reversing the'bed' while the pinions and segmental gear are out of mesh.

12. In meansfor reciprocating type beds, the combination of. a rack attached to the bed, a bed driving gear engaging the rack, a shaft carrying saidgear, asegmental gear keyed on said shaft, and oppositely rotating pinions adapted to transmit motion to the segmental gear, said segmental gear .being provided with a gap to permit the shifting of the pinions without clash; with means for shifting said intermediate pinions so as to alternately drive the said segmental gear; a segment on .the shaft, and a crank actuated rack bar adapted to be engaged by the 'se'gment, and reverse 'the'motion of the bed While the pinions are out of mesh with thesegmental gear.

-13. Means for reciprocating I type, beds, comprising a rack attached to the bed, a bed driving gear engaging the rack, a shaft carrying said gear, a'segmen'tal gear keyed on sald shaft, a loose drlven gear on said shaft beside the segmental gear, a second .driven gear meshing with the loose gear;

and oppositely rotating pinions adapted to alternately transmit motion from the driven gears to the segmental gear; said segmental gear being provided with a gap to permit the shifting of the pinions without clash; with means for shifting said intermediate \pinions so as to alternately drive the said segmental gear fromsaid driven gears, and means for reversing the motion of the bed while the pinions are out of mesh with said segmental gear.

14c. In combination, a bed driving gear, a

shaft carrying said gear, and a gapped gear keyed to said shaft; with a pair. of oppositely rotating driven pinions at one side of said shaft, and means for shifting the pinions alternately into position to mesh with the teeth of the gapped gear while the gap is passing the pinions.

15. In combination, a bed driving gear, a shaft carrying said gear, a gapped gear keyed to said shaft, a pain of axially alinedoppositely rotating driven pinions at one side of said shaft, and means whereby said pinions may be alternately shifted into position to mesh with the teeth of the gapped gear while the gap is passing said pinions; with means for reversing the rotation of the gapped gear while both pinions are disengaged therefrom.

16. The combination of a reciprocating type bed having arack on its under side, a

bed driving gear meshing with said rack,

andmeans for rotating said gear alternately in opposite directions to move the bed dur -ing the uniform portions of its strokes, and

means for disengaging the rotating means from said gear at the ends of such uniform I portions of the strokes; with a segment connected with said gear, and of substantially the same pitch diameter as the gear, a reciprocating rack bar having a Scotch yoke on one end, a crank engaging said yoke,

of two witnesses.

' MICHAEL ANDREW DROITCOUR.

Witnesses:

GEO. R. WHATLEY, CHAS, HICKMAn.

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