US1257830A - Driving mechanism. - Google Patents

Description

W. EVENSEN.

DHiVING MECHANISNI.

APPLICATION FILED JUNE 12, 19H.

1,257,830. Patented Feb. 26,1918.

2 SHEETS-SHEET 2.

lli?

WILLIAM nvENsnN,

coureur,

OF CHICAGO, ILLINOIS, ASSIGNOR TO THE OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

GOSS PRINTING PRESS DRIVING MECHANISM.

Application filed .Tune 12, 1917.

To all 'wim/1L it may concern.'

Be it known that I,- IVILLIAM EVENSEN, a citizen of the United States, and a resident of' Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Driving Mechanisms, of which the following is a specification, reference being hadl to the accompanying drawings.

Iy invention relates to driving mechanisms and particularly to a form of driving mechanism adapted for use with printing presses. It is one of the principal objects of my invention to provideia form and arrangement of driving parts comprising a clutch through which the power may be applied at low speed, such clutch being'of a type adapted to take hold vvimmediately without slippage when power is to be transmitted therethrough, thereby preventing any tendency of the press being driven to first choke and then start suddenly, as would be the ease if there were any appreciable lost motion in the connections between the press and the source of power. It is another object of my invention to provide a mechanism of this type which shall be substantially noiseless at all stages of the operation of the press.' It is another object of my invention to improve driving mechanisms of this type in sundry details hereinafter pointed out. The preferred means by which I have accomplished my several objects are illustrated in the drawings and are hereinafter specifically described. That which I believe to be new and desire to cover by this application is set forth in the claims.

In the drawings:

Figure 1 is a top or plan view of a driving mechanism embodying the preferred form of my invention;

Fig. 2 is an enlarged detail, being an enlarged sectional view taken substantially on line 2 2 of Fig. 1; and

Fig. 3 is a horizontal sectional View through the parts shown in Fig. 2, being taken substantially on line 33 of said figure.

Referring to the several figures of the drawings in which corresponding partsare indicated by the same reference characters,-

10 indicates a drive sha-ft revolubly mounted in bearings 11 of any suitable type adaptd Specification of Letters Patent.

Patented Feb. 26, 191s. Serial N o. 174,249.

to be driven by a motor 12 suitably connected therewith. The shaft 10 has revolubly mounted thereon a large gear 13 from which power is to be transmitted through any-suitable train of mechanism to a printing press or any other mechanism to be driven. The gear 13 is adapted to be connected with the shaft 10 so as to rotate therewith by means of a clutch mechanism 14 of any suitable type which is adapted to be thrown into and out of operation by means of a shifting lever 15 having operative engagement with a groove 16 in a slidably mounted clutch member 17. lVhen the lever 15 is in the position shown in Fig. 1 the clutch 14 is maintained in operation for causing the gear 13 to rotate with the shaft 10. hen the lever 15 is given a stroke in the direction away from the gear 13, the toggle levers 18 of the clutch are straightened more or less relative to each other, serving to throw the clutch out of operation.

The shaft l0 is also operatively connectedwith the gear 13 through the medium of a train of mechanism by which the gear 13 can be driven at a comparatively very much slower rate of speed. This mechanism com` prises a pinion 19 ixedly mounted upon the shaft 10 meshing with a gear 2O which is revolubly mounted upon a shaft 21 journaled in bearings 22 alongside of the shaft 10. The shaft 21 is adapted to be connected with a rotary member 23 by means o1.' a clutch 24 similar to the clutch 14. The clutch 24 is adapted to be thrown into operation by means of a lever 25 engaging a groove 26 in a clutch member 27, a movement of the member 27 longitudinally of the shaft 21 serving through the toggle arms 28 to throw the clutch 24 into and out of operation as Iwill be readily understood. The shaft 21 is connected with the gear 13 b means of a pinion 29 meshing with suc gear.

The train of mechanism for connecting the shaft 10 with the gear 13 through the medium of the shaft 21 and its cooperating parts comprises clutch connections between the gear 20 and the rotary member 23.

These connections comprise a drum or collar 30 keyed or otherwise firmly secured upon the hub 31 of the gear 20, the drum 30 being located adjacent to the rotary member 23 as is best shown in Fig. 3. A plurality of friction shoes 32 of any suitable type are pivotally mounted upon the inner ends of links 33 which in turn are pivotally mounted upon the rotary member Z3 by means of pins or bolts 34. Springs 35 are connected to the links 33 respectively and to the rotary member 23, such springs 35 having a tendency to draw the links 33 toward their radial positions, the shoes 32 into contact with the periphery of the drum 30. The periphery of the drum -30 and the engaging faces of the shoes 32 are adapted to be of any appropriate ma terial and form so as to produce a proper frictional engagen'ient between the contact? rotated in clockwise direction in Fig. the rotary member will be caused to rotate in the same direction therewith. In the construction shown, the shoes 32 are provided with friction facings 32 of leather or other suitable material, and the drum 30 is corrugated on its face to facilitatethe gripping action. lVhile the strength of the springs is such as to hold the shoes 32 normally in position to be immediat-ely operative for causing the rotationof the rotary member Q3 upon the rotation 0f the drum 30 Vin clockwise direction in Fig. 2, such springs are not ofl such a strength as to cause a rotation of the drum 30 'in clock- 'wise direction when power is applied to the rotary member 23 for rotating it in clockwise direction in said figure independently of the drum 30.

lVith the motor 12l causing a rotation of the shaft 10 in the direction indicated by the arrow thereon in Fig. 1, the pinion 19 Will be driven in the same direction, causing a rotation of the gear 2O and the hub 31 in the opposite direction as indicated by the arrow on said hub in said figure. `With the clutch 14 out of operation by reason of a proper manipulation of the lever 15, and with the clutch Q4 yin operation, power will then be applied from the hub 31 and drum 30 through the shoes and links 33 to the rotary member and through the clutch Q-l to theshaft 21 to drive such shaft in theadirectionindicated by the arrow thereon in Fig. l, such motion heilig transmitted through the pinion 39 to thc gear 13 for driving such gear 13 uthe di rection indicated by the arrow upon the clutch mechanism 14. in said figure. Vhen it is desired to speed up the driving of the printing press or other machine operatively connected with the gear 13 as above described, this is accomplished by throwing the clutch 14 into operation, serving to connect the gear 13 directly with the shaft 1() soas to cause such gear 13 to rotate at the same speed as that of the motor 12 instead of at the comparatively milch slower speed when the power is applied through the stepserving to bringv nig surfaces so that when the drum 30 is' down gearing 15)20 and Z9-13. When the gear 13 is thus driven at high speed, the pinion Q9 and the shaft 21 will be driven ata comparatively higher speed, as will be readily understood, servin to rotate the rotary member Q3 at a veryiigh speed in the direction indicated by the arrow upon the hub 31 in Fig. 1,--that is to say, in the direction indicated by the arrow adjacent to therotary member 23 inFig. 2. Immediately upon the application of ower through the clutch 14, the rotary mem er Q3 will begin to rotate in clockwise direction in Fig.

2 independently of the drum 30, the springs 35 being adapted to yield as above described to permit the loosening of the slices upon the drum 30. As the clutch Vlll tightens, serving to increase the speed of rotation of the rotary member Q3, the shoes 32 are caused to move outward by centrifugal forcey i against the action of y the springs 35 out of contact with the drum 30. In case the clutch 2l is then thrown out of operation so as to disconnect the rotary member Q3 from the shaft 21,' the high speed driving of the rotary member 23 will cease, and the springs 35 Awill again draw the shoes 32 into contact with the drum 30 whereupon the rotary member will again begin its slow speed rotation with the gear 20.

lVlien the press is being driven at high speed, as above described, and it is desired for any 'reason to change to the low speed driving, the power for continuing the driv ing of the press at the low speed is applied immediately without any lost motion through the medium of the friction shoes 3Q just as soon as the press is slowed down to its normal slow speed rotation, the shoes 32 being brought into loose contact with the drum 30 by reason of the slowing down of the rotary member 23 some time 1n advance of the beginning of the application of power through the slices. The press is thus assured against any possible falling belowthe normal slow speed driving and against any possible choking or sudden starting upon the transfer from the high speed drive to the low speed drive. Moreover, it is plain that there can be no abnormal slowing down or choking of the press upon a change from the low speed driving to the high speed driving since the high speed driving inecl'ianism thrown into operation without a prior disconnection of the low speed driving mechanism. 'With the press being run smoothly and evenly in this manner, a change from the high speed to the low speed driving or from the low speed to the high speed driv ing can be accomplished without any substantial danger that the web shall be snapped by reason of the change. lnasmuch as this feature is very important in printing press work, it will be seen that my invention is peculiarly adapted for use with 1 ery of said drum tes-asso printing presses, but it will be understood that I do not wish to limit myself to that particular use exclusively.

. So far as I am aware, I am the first in the art to provide a driving mechanism comprising a rotary drum, and a rotary member journaled upon the axis of the drum and provided with one or more friction shoes mova'bly mounted thereon and adapted to o eratively engage the outer periphery of tlie drum, whether or not such shoes are providedwith friction, faeings of leather or other yielding material, and VWhether or not such drum is corrugated as in the construction shown in the drawings, and my claims are to be construed accordingly.

What Iclaimas my invention and desire to secure by Letters ,)atent, is

l. In a driving mechanism, the combination of a drum, means for rotating said drum in one direction, a rotary member journaled upon the axis about which Saiddrum rotates,

a friction shoe adapted to be brought intoengagement with the periphery of said drum and adapted when in operative engagementl todrive the rotary member in the same direction, and other means for rotatingy said rotary member in the same direction at a higher speed, serving to carry said friction shoe out of operative engagement with the drum. l f

2. In a driving mechanism, the combination of a drum, means for rotating said drum in one direction, a rotary member jonrnaled upon the axis about which said drum rotates, a friction shoe adapted to be brought into engagement with the periphery of said drum and adapted when in operative engagement to drive the rotary member in the same direction, and other means for rotating said rotary member in the same direction at a higher speed, serving to cause said friction shoe to move outward by centrifugal force out of operative engagement with the drum.

3. In a driving mechanism, the combination of a drum, means for rotating said drum in one direction, a rotary member journaled upon the axis about which said drum rotates, a frictionshoe adapted to be brought into engagement with the periphand adapted when in operative engagement to drive the rotary member in the same direction, and other means for rotating said rotary member in the same direction at a higher speed, serving to move the friction shoe outwardly from engagement with the drum.

lnto operative engagement with the periphagainst the action of said ery of the drum and adapted when in operative engagement to drive the rotary member in the same direction, and other means for rotating said rotary member -with the friction shoe carried thereby in the same direction at a higher speed serving to carry said friction shoe by centrifugal force outward out of operative engagement with the drum.

5. In a driving mechanism, the combination of a drum, means for rotating said drum in one1 direction, a, rotary member journaled upon the axis about which said drum rotates, a friction shoev movabl y mounted on said rotary member adapted to be brought into operative engagement with the i-)erilihery of the drum and adapted when in operative engagement to drive the rotary member in the Asame direction, yielding means tending to hold said friction shoe 1n operative engagement with said drum, and other means for rotating said rotary member with the friction shoe carried thereby in the same direction at a higher speed serving to carry said friction shoe outward by centrifugal force yielding means out of operative engagement with the drum.

In a driving mechanism, the combination of a drum, means for rotating said drum in one direction, a rotary member` journaled upon the axis about which said drum rotates, a plurality of links pivotally mounted on said rotary member and'extending toward the periphery of said drum, a plurality of friction shoes connected with the inner end portions of said links respectively and adapted to have operative engagement with said drum when said links are swung Substantially into radial position, yielding means tending to swing said links into radial position for causing the friction shoes to rotate said rotary member vwith said drum, andother means for rotating said speed serving to out of operative engagement with the drum.

7. In a driving mechanism, the combination of a drum, means for rotating said drum in one direction, a rotary member journaled upon the axis about which said drum rotates, a friction shoe adapted to be brought into engagement with the periphery of said drum and adapted when in operative engagement to drivethe rotary member in the same direction, and other means for rotating said rotary member in the same direction at a higher speed, serving to cause said friction shoe to lag behind slightly rel-4 ative to its operative position upon the rotary member and eventually to move outward by centrifugal force out of operative engagement with the drum.

8. In a driving mechanism, the combination of a rotary drum, a rotaryr member journaled upon the axis about which said drum a friction Shoe movably the corrugated face of said drum,

is adapted to revolve, a friction shoe movably mounted on said rotary member adapted to be brought into operative engagement with the outer face of said drum and adapted when in operative engagement to lock said drum and said rotary member against rotation in one direction relative to each other, and yielding means tending to hold said friction shoe in operative engagement with said drum.

9. In a driving mechanism, the combina,- tion of a drum provided with longitudinallyextending corrugations on its outer face, a rotary member journaled upon the axis about which said drum is revolubly mounted, mounted on said rotary member and provided with a friction facing of yielding material adapted to be brought into operative engagement with and yield-l .vided with a friction maman ing means tending to hold said friction shoe in operative engagement with said drum whereby either the drum or the rotary member is adapted to drive the other in one direction.

10. In a driving mechanism, the combination of a drum provided with longitudinallyextending corrugations on its outer face, a rotary member journaled upon the Vaxis about which said drum is revolubl mounted, a plurality of friction shoes movalily mounted on said rotary member and each profacing of yielding material adapted to be brought into operative engagement with the corrugated face of said drum, and means for holding said shoes yieldingly in operative Contact with said drum for rotating the drum in one direction.

WILLIAM EVENSEN.

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