US1356051A

US1356051A - Printing-press

Info

Publication number: US1356051A
Application number: US161338A
Authority: US
Inventors: Michael A Droitcour
Original assignee: Individual
Current assignee: Individual
Priority date: 1917-04-11
Filing date: 1917-04-11
Publication date: 1920-10-19
Anticipated expiration: 1937-10-19

Description

M. A. naoncoufi.

PRINTING PRESS.

- APPLiCATION FILED APE. H, 1917. RENEWED OCT. 23. 1 919. 1,356,051.

a l. b

M, A. DROITCOUR.

PRINTING PRESS. APPLICATION FILED APR. 11. 1917. RENEWED 0CT.23.1919.

1,356,051. Patented Oct. 19,1920.

7SHEETSSHEET 2.

M. A. DROITCOURQ PRINT ING PRESS APPLICATI ONIILED' APR. 1, 1917- RENEWED OCT. 23. 1919.

1,356,051. Patented Oct. 19,1920.

7SHEETSSHEET 3.

ISHEhTS -SHEE! 1.

Patented Oct. 19, 1920.

M A. DROITCOUR.

PRINTING PRESS.

. APPLICATION FILED APR. 11, 1917- RENEWED' OCT. 23.1919. 1,356,051,

M. A. DROITCOUR. gmmme mss'. APPLICATION FILED APR. 11'. I917. RENEWED OCT. 23', I9

9 Paten ted Oct. 19,1920.

YSHEEIS-ISHEET 5.

"JNV NTUI M. A. DROITCOUR.

'PRINT|NG PRESS. APPLICATION FILED APR. H, 1917. RENEWED OCT. 23, 1919. 1,356,051.

Patented Oct. 19, 1920.

I SHEE1S-SHEET 6.

El/2a INVEN'T'UH MM? MW IM.IA.'DROITCOUR.

PRINTING PRESS.

RENEWED-OCT. 23.'1919.

I APPLICATION-FILED APR. 11, 1917. 1,356,051,

Patented' 005. 19,1920.

rsHEEls-sHhET 7.

INVENT DE.

PATENT OFFICE.

' MICHAEL A. DROITCOUR, OF DELPHOS, OHIO. I

PRINTING-PRESS.

Specification of Letters Patent.

Patented Oct. 19, 1920.

. Application filed April 11, 1917, Serial No; 161,338- Renewed October 23, 1519. Serial No. 332,852.

To all'whom it may concern:

Be it known that 1, MICHAEL A. DROIT- COUR, a citizen of the United States, and a resident of Delphos, in the county of Allen, and State of Ohio, have invented a certain new and useful Printing-Press; 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 the characters of reference marked thereon, which form a part of this specification.

This invention relates to apparatus in which a reciprocally movable bed or member is employed, and particularly to improved means for reciprocating the type-beds of printing presses of the flat-bed and cylindrical type.

The primary object of my invention is to provide novel'means for driving a printing press bed and reversing its movements at the end of each stroke, the reversing being accomplished in an efficient and rapid manner without jar or shock, thus enabling the press to be run at a very high speed without liability of racking. the same.

Further objects and advantages of the in vention will be apparent from the following detailed description thereof.

Vhile the invention, in its broader aspect, is capable of embodiment in numerous forms, a preferred embodiment thereof is illustrated in the accompanying drawings in which,-

Figure 1 is a side elevation of a press embodying my invention, with parts broken away. Figs. 2 and 3 are different fragmentary detailed views of the impression control means, with parts in section on the line 3-3 in Fig. 1. Fig. 4 is a top plan view of the press, with the cylinder and bed removed, with a part broken away, and with a portion of the vibrating inking rolls in'position.-

Fig. 5 is a section on the line ,55 in Fig. 1. Fig.6 is a section on the line 6-6 in Fig. 5, with parts removed and parts broken away. Fig.7 is an enlarged perspective View ofla part of the impression controlmeans. Figs. 8 and 9 are enlarged sections on the line 8 8 in Fig. 5. Fig. 10 a fragmentary perspective view of one side portion of the press, with parts removed.' Flg. 11 -15 a fragmentary perspectiveview of one of the slide frames, with aportion of the rollers removed. Fig. 12 is a side elevation of the rotary reciprocatory bed driving shaft, with the parts carried thereby in section. Fig.

13 is an enlarged fragmentary perspective view of a portion of the bed reversingmechamsm. -;Figs. 14, 15, 16 and 17 are conventional s1de views of the bed and cylinder driving mechanism at different points in a cycle-of operations with parts broken away, i and Fig. 18 is a section on the line 18-18 in F ilg. 1. v

eferring to the drawings, 1 designates the press frame, of any suitable construction, and 2 the customary bed, which is 'mounted for reciprocatory movements under a fly-wheel 5, a broad pinion 6, and a narrow pinion 7 without one side of the frame,

the pinions 6 and 7 being spaced apart to permit the positioning of a gear therebetween. The pinion 6 meshes with and drives a pinion 8, which is loosely mounted for both rotary and axial sliding movements on a subjacent stub-shaft 9 (Fig. 18). A pinion 10 which is slightly smaller than the pinion 8, is fixed to said pinion atits inner side to have rotation and axial movements therewith. A broad pinion 11, which is the same size as the pinion 10, is mounted on the shaft 9 at the inner side of the pinion 10 for free rotary and axial movements. yoke 12 embraces the set of

gears

8, 10 and 11, and is operable, as hereinafter described, to control the axial shifting movements thereof.

A shaft 13 (Figs. 4, 5, 6 and 12) is journaled transversely in the frame 1 at one side of the drive shaft 4 and substantially central of the reciprocatorymovements of the bed 2. A pair of gears 14 are keyed to the shaft 13 and are in constant mesh with respective racks 15 (Fig. 5) on the under side of the bed, longitudinally thereof. The two slide: frames '16, which carry rollers 17 between the frame runners '18 and bed 2, are

the gears 14 meshing with the racks 15 and these gears and racks are disposed on opposite sides of and equidistant from-the central longitudinal line of the bed so that the bed is driven forward or backward without any lateral twisting movement or strain such as are caused when only one gear and rack are used under the bed and such rack is at one side of the longitudinal center of the bed. The pinions 14 remain in mesh with the racks 15 at all times but are only operatively controlling the bed during the uni form portions of its stroke, the bed being reversed at the end of its stroke by the mechanism hereinafter explained. By employing a pair of bed driving racks and pinions at opposite sides of the center of the bed, as described, I am enabled to arrange the reverse racks 34 and reverse lever 33 in the plane of the central line of the bed; and with this construction the bed is always cent-rally driven, and centrally reversed, or balanced, and has no tendency to twist or become laterally displaced during any portion of its stroke.

Lateral twisting movements of the bed are also caused by the impression of the form being heavy on one side of bed and light on the other, the make-ready of course being sometimes heavier or thicker on one side than on the other which would tend to twist the bed; but, because of the arrangement of two tracks and two gears, the bed has a parallel movement regardless of impression strains and the reversing movements being centralized are not affected by the unequal impressionpressures as no printing occurs while the bed is being reversed.

The shaft 13 has the end thereof adjacent to the stub-shaft 9 projected without the frame 1 and carrying a loose gear 21 and a fixed gap-gear 22, said gears being of equal size and disposed in close relation and ,adapted to simultaneously mesh with the broad pinion 11 on the stub-shaft 9 during a pre determined portion of a cycle of operations. The pinion 11 remains in permanent mesh with the gear 21 and is shiftable into and out of mesh with the gear 22 during the bed reversing periods. The pinion 7 on the drive shaft 4 is also in permanent driving connection with the gear 21, thus causing a continuous driving of said gear at a uniform speed in one direction during a running of the press.

The drive-shaft 4 carries a pinion 23 (Figs. 4 and.5) near the transverse center of the press, which pinion meshes with and drives a crank-gear 24, which is mounted on a shaft that is journaled transversely in one side portion of the frame 1 adjacent to one end thereof. The gear 24 has the crank-pin 26 carrying a block 27 (Fig. 13) mounted for vertical 'reciprocatory movements in a vertical guide portion of a reversing slide or cross-head 28, which is vided with a segment 32 in mesh with the reverse rack 30 and has its upper arm provided with a segment 33 for meshing with a short bed-reverse rack 34 at the adjacent end of the bed 2 during the reversing movement of the bed, one of said racks 34 beinglocated at each end of the bed. The arm of the lever 31 which meshes with the reverse rack 30 is longer thanthe arm of such lever which meshes with the bed reverse rack 34, thus enabling the distance between the center of the crank-pin 26 and its axis of revolution to be greater than would otherwise be the case. The bed reversing action ofthe reversing mechanism is very much facilitated by providing the crank pin of such mechanism with a longer throw than the radius of the bed rack engaging segment 33, it beingv found in 'practice that with this mechanism the speed of running of the press (especially if large) can be very materially increased over the speed at which it could be safely run with a reversing mechanism provided with a crank throw which is equal to the radius of the bed reversing segment 33. In the present press the crank has an 8 inch radius, the reverse rack segment 32 has a 12inch radius, and the bed-reverse rack segment 33 has a 9 inch radius. The crank-gear 24 is geared to have three revolutions for each cycle of operations of the press or for each single revolution of the impression cylinder, one revolution of the crank gear taking place at each impression and return stroke of the bed and a half revolution of such gear taking place at each reverse stroke.

It will be noted that with my reversing mechanism the movements of the reverse rack 30 are always reverse to the movements of the bed during a reversing period. This is an important feature as a balancing action of the bed is thereby obtained and vibration of the press practically eliminated.

In order to prevent wrenching and binding of the reverse slide 28 on the guide rods 29 when power is applied to said slide at one side or the other of its center. the slide is provided with a vertical shaft35, which is slide; and the twisting or torsional strains which are ordinarily exerted on the slide by the block 27, especially near the ends of its strokes in the grooves in the slide 28, are overcome and equalized throughout the length of the slide by means of the shaft 35, gears 36 and racks 37, whichinsure 'a smooth movement of'the bed over centers and dur ing the reverse, which is quite important in effecting fine printing, as otherwise some slight vibration is apt to be started-during thereverse'by the pressure of the block at the ends of the slot in the slide, which vibration would continue, momentarily at least, and cause inferior printing.

A shaft 38 is ournaled in the frame 1 transversely thereof and carries a cam wheel 39, which is provided in one side with a camway for receiv in a roll 40 that-is. carried by a rack-ban41. of the frame and has one end.

forkedandjstraddling the shaft 38 (Figs.

his rack-bar extends longitudinally I f1, 4, and 5),;whereby such bar is supported .oneendby the shaft while the otherend of said bar rests on and is guided for movewith rack teeth in mesh with a gear segment 43-which is carried-for horizontal oscillatory movements by said bracket. The segment '43 also meshes with the inner end of a rack-bar 44 which projects inward from and forms a part of the gear. shifting yoke 12 and has its movements ina plane at right angles to the plane of movements of the bar 41. It is evident that the bar 41 is periodically moved forward and backward by the cam 39 and that its movements are communicated to the gear shifting frame 12 through the gear segment 43.

The journals 45 of the cylinder 3 are carried by, bearing blocks 46 (Figs. 8 and '9), which are mounted in vertical guideways in the frame 1 for vertical rt fiproc atory movements. The blocks 46 are yieldingly supported by coiled compression springs .47, which normally act to support the cylinder in raised position with respect to the bed. Each block 46 has a short rockshaft'48 mounted on the top, thereof, being partially seated in a depression provided therefor in the top of the block. The top side of the rockshaft 48 is recessed longitudinally thereof to form a seat for the lower end of an impression knuckle 49, which rests for pivotal. rocking movements onsaid rocksha'ft and'has, its upper end to the rock-shaft 48, the journal block 46' is lowered'against the tension of the springs 47-to"eifect' a" lowering of the cylinder to impressionposition, and when the shaft 48 is rocked slightly in'one direction or the seating against the under side of-a thrust block in pivotal 8 and9),.'

engagemen't therewith hen the knuckle 49 isin vertical position or in radial relation other the inner end of the knuckle 49 is swung laterally, thereby shortening the dis.- tance between the shaft 48 and thrustblock 50 and permitting a raising of the cylinder from impression position. The shaft 48 and knuckle 49 act in the manner of a toggle. The thrust-block 50 is mounted in a head-piece 51 of the frame and is adjusted by means of a screw 52; The ends of the knuckle. 49' are provided with trunnions which project into. recesses. in the flanges provided at the opposite end porpai ons zof the rock shaft, as best shown in ach rock shaft 48 .has a crank arm 53 projecting laterally therefrom and connect .ed by a link 54 to a subjacent rocker arm frame 1 transversely thereof 1,. 2 and 3). The shaft 56 is provided at one end thereof without the frame 1 with a loose rocker arm 57, which is upwardly directed and carries at its free end a roller 58, which I travels in acam-groove 59 in the side of a ments by" a frame bracket 42 and is provided gear wheel 60 that is mounted on the' outer adjacent end of the shafti38. The gear wheel 60 is continuously driven by a pinion 61,.that is fixed'to the continuously driven loose gear 21, the ratio'of the gears being such as to cause the gear 60 to make'one revolution to each two revolutions of the cylinderB, which is driven by the gear 21 gether for unitary movements in the man-.

ner of a bell-crank lever. It is thus evident that during an impression stroke of the bed the cylinder is held in lowered position by reason of the roller 58 traveling in the --outer neutral portion of the cam-way 59, as shown in Figs. 1 and 3, and that said "roller when traveling in the remaining portion of the cam-way permits the cylinder toj'move to and remainiin impression released position.

An impression trip lever66.(Figs. 2 and 3), is pivoted to'the side of the frame 1, at which the catch 64 is disposed, and has a fingerf67 pivotally projectingfupward from the outer end of its free arm and carrying a roller 681 This roller isyi'eld ingly held in rolling fcontact'with a cam surface 69 at the upper'i'nner side edgeof the catch'64 by a spring 70,-and upon a depression oftlie outer end of the lever66 theroller '68 is Caused to travel up the can surface 69 and approach the periphery of the cam-wheel 60, and to stand in position for a cam-block 71 on the peripheral portion of the wheel 60 to strike said roller and communicate a trip movement through it to the catch 64 to throw it outward from engagement with the catch-stud 65. This trip can only take place when the roller 58 is in the inwardly retracted portion of the camway 59, as is apparent by reason of the position of the parts in Figs. 2 and 3, and the cam-plate 71 is positioned to effect a tripping of the catch 64 shortly before the entrance of the roller 58 into the outer neutral portion of the cam-way 59. It is evident that whenthe catch 64 is released from the catch lug 65 the rocker arm 57 is. permitted to have free rocking movements relative to the shaft 56 and rocker arm 55.

The normal inactive position of the roller 68 with the trip lever raised is shown in Figs. 2 and 8, and a depression of the trip lever from this position with the parts in the positions shown in Fig. 2 will cause a sufiicient movement of the roller 68 by the cam surface 69 to place said roller in position to be engaged and moved outward by the block 71 a sufiicient distance to disengage the catch 64 from the lug 65.

A cam-wheel 72 is fixed to the shaft 13 adjacent to the end thereof opposed to that carrying the

gears

21 and 22, and has a camway-73 in one side thereof (Fig. 10) in which a roller at the end of a rocker arm 74 travels. F iXed to the shaft 75 with this rocker arm, which shaft is journaled in one side of the frame 1, is a gear segment 76 in mesh with a rack-bar 77, which is mounted for longi tudinal movements lengthwise of the frame at one side thereof. The bar 77 is provided:

on its outer side adjacent to each end with a set of rack teeth in mesh withfa respective gear segment 78, each of which 'is figied to a vertical rock shaft 7 9 that is suitably journaled in bearings on the frame side. The upper end of each rock shaft 79 is provided with a yoke or cross-head 80, which at its opposite ends engages the adjacent ends of a pair of vibrating inking rolls 81 to impart opposed longitudinal reciprocatory or vibrating movements to said rolls when the shaft 79 is rocked (Figs. 4 and 10).

The operation of my press is as follows: The main drive shaft 4 when driven imparts continuous rotation to the loose gear 21 from the drive pinion 7, and imparts continuous rotation to the

pinions

8 and 10 from the broad drive pinion 6, which is in mesh with the gear 8. The cylinder 3 is also continuously driven at uniform speed with the gear 21 due to the meshing of said gear with the cylinder gear 62 of like size. The reverse crank gear 24 is driven direct from the drive shaft 4 through the medium of the pinion 23, which pinion, in the present instance, has

that the bed-reverse rack segment 33 is justleaving the short bed-reverse rack at the forward end of the bedand the broad pinion 11 is in position to mesh with both

gears

21 and 22, and just entering into mesh with the teeth of the gear22 at the then leaving end of its gap, so that the two

gears

21 and 22 are tied together and-caused to rotate in unison and to effect a driving of the bed and cylinder at uniform speeds and in synchronism. When the

gears

21 and 22 are thus coupled together the drive of the bed is through the shaft 13, gears 14 and 'racks 15 on the bed. This relation of the bed and,

cylinder drive parts is maintained until the bed has moved to near the limit of its im pression stroke and the bed reverse segment 33 has moved into mesh with the forward end of'the rear reverse rack 34 (Fig. 15). At this point the coupling pinion 11 enters the gap of the gear 22, thus disconnecting the

gears

21 and 22. When said gears are thus disconnected the drive of the bed is no longer through the shaft 13, pinions 14 and bed racks 15, as the gear 21, which isnow the driven gear, is free to turn loosely on said shaft, but the drive of the bed is through the reversing mechanism and is controlled by the crank gear 24. Whenthe reversing segment :33'takes into the rear reverse rack 34 the acrank pin is at the lower end of its throw" (Fig. 15) and the slowing down, reversing and speeding up of the bed to running speed accomplished while the crank pin is moving'from the lower to the uppermost limit of its stroke (Fig. 16). During the reversing period the

gears

21 and 22 are permitted to have relative rotary movements due to the coupling pinion l1 entering the gap of the gear 22, and said pinion, together with the

pinions

8 and 10, are then shifted to the left (Fig. 18) to shift the pinion 11 from the pinion 10 into register with the gear 22. It will be understood that the pinion 10 is driven in a reverse direction to the pinion 11 due to the connection of the former with the drive pinion 6 and that the gear 22, during its idle movement or while disconnected from the gear 21, is driven from the bed in synchronism therewith through the racks 15, gears 14 and shaft 13. It is thus evident that the gear 22, during the rearward or return strokeof the bed 2. is revolving in a reverse direction to that of the gear 21. \Vhen the movement of the bed at the end of its impression stroke has been reversed and the segment 33 is about to leave the rear reverse rack 34, the gear 22 has turned in a reverse direction relative to the gear 21a suflicient distance for the teeth at the then leaving end of the gap to take into the pinion 10, so that the rearward stroke is "then imparted to the bed from the main shaft 4 through the

pinions

6, 8, 10, gear 22, shaft 13' and pinions and racks 14, 15 (Fig. 17). It is evident that when the bed is near the end of its rearward stroke the reverse segment 33 takes into the reverse rack 34 at the forward end of the bed at ap proximately the time that the pinion 10 enters the gap of the gear 22. During the reversing of the movement of the bed by the reversing segment the gear 22 has its direction of rotation reversed to again move in unison with the gear-21 and. the

pinions

8, 10 and 11 are shifted to the right (Fig. 18) to shift the pinion 10 out of and the coupling pinion 11 into register with the gear 22, so that when the end of the gap in the '2 gear 22 in the reverse rotation thereof is reached the coupling pinion 11. will mesh with the teeth of said gear and cause it to be driven in synchronism with the gear 21.

During each impression stroke of the bed the cylinder 3 is lowered to impression po-. sition by reason of the roller 58' on the rocker arm 57 (Figs. 2 and 3) then traveling in the outer neutral portion of the cam-way 59, thus causing the rocker arm 57 to effecta depression of the rocker arms 55 through the medium of the catch 64 which is in engagement with the" catch lug '65 on one of said arms 55 The'depression of the arms 55 communicates a downward rocking movement to the rocker arms 53 (Figs. 1, 8, 9 and 10) and a consequent rocking of the shafts 48 to move'the knuckles 49 to vertical or cylinder depressing position, as shown in. Figs. 1 and 8. After the impression' stroke, the roller 58 moves to the radially restricted portion of the camway 59 and permits a raising operative position. hould it be desired to prevent an impression taking place at any cycle of operations, the operator depresses ward into position to be engaged by thecam-plate 71 at a predetermined point in its revolution. The engagement of said roller by the cam-plate causes an outward swinging of the catch 64 from stud engaging position, so that a'rocking movement of. the rocker arm 57 will not be communicated to the rocker arms 55. Thecylinder will continue to missimpressions so long as the foot pedal 66 remains depressed.-

It will be seen that the gears 14 and bed racks 15 remain constantly in mesh and perform an important office during the period of reversal of the bed, as they then act to drive of the cylinder to inthe gear 22 while it is out of mesh with gears 11 or 10; and to slow down this gear 22 with the bed, and reverse its direction of rotation and speed it up, to an equal speed of rotation with the gear 21, and in the proper direction of rotation to be engaged by and meshed with either the gear 11 or the gear 10. Thus the bed will be driven during the uniform portion of its stroke by the gear 22 operating shaft 13 and driving the gears 14 meshing the racks 15 and the direction of the rotation of the shaft 13 is reversed, during the reversals of the bed, by reason of the continuous mesh of the gears 14 with the bed racks 15. V

I wish it understood that my invention is not limited to any specific arrangement, construction'or 'form of the parts, as the presentembodiment thereof is merely illustrative of the invention and capable of numerous modifications and changes without departing from the spirit bf 'the'claims.

thereto at the reversing points in its movements, and a reversing mechanism embody- .ing a revolving crank, a rack reciprocally vmovable by said crank, and a lever having at one end a segment in mesh with said last rack and at its other end a segment which meshes with one or the other of said reverse racks to. communicate a reversing movement to the bed at the end of each stroke thereof. I

2. A combination as called for in claim 1, wherein the arms of said lever and the throw of said crank are each different in length. e

3. A combination as called for in claim 1, wherein the arm of said lever engaging said reversing mechanism rack is longer than the other arm of thelever, and thethrow of long arm and greater than the length of said-short arm of the lever. the foot pedal 66 from the position shown in 4. In combination, a reciprocating bed,

means for imparting forward and backward strokes-at uniform speeds to said bed and idling with respect-to the bed during each reversal of the direction of-movement thereof, .means forengaging and reversing the movement of said bed adjacent to the end of each stroke and idling with respect to the bed during the major portion of each stroke,

apart of said bed means being in continuous driving connection with the bed and a part of saidbed driving means acting as a (11'1"8 for the reversing means.

5. In combination, a reciprocating bed having a reverse rack at each end and amain driving rack, bed driving means having a portion continually engaging said main rack, said means idling with respect to the bed during the reversing movements thereof, and means for engaging one of said reverse racks and reversing the movement of the bed adjacent'to the end of each stroke and idling With respect to the bed during the main driving thereof.

6. In combination, a reciprocable bed having a reverse rack at each end, means for driving said bed and idling with respect thereto at the reversing points in its movements, and a reversing mechanism having a reciprocably movable member and an element for connecting said member with one or the other of said bed reverse racks to communicate a reversing movement to the bed at the end of each stroke, the movements of said member during a bed reversing period being reverse to the movements of the bed whereby the reversing mechanism has a counter-balancing action to the bed during a reversing thereof.

7. In combination, a reciprocable bed having a reversing rackat each end, means for driving said bed and idling with respect thereto at the reversing points in its movements, and a reversing mechanism embody ing a rack, means for reciprocating the rack, and a lever having at one end a segment in mesh with said last rack and at its other end a segment which meshes with one or the other of said bed reverse racks to communicate a reversing movement to the bed at the end of-each stroke thereof, the direction of movement of the mechanism rack being reverse to the movements of the bed during each reversing period.

8. In combination, a reciprocable mem her having a reverse rack at each end, means for driving said member and idling with respect thereto at the reversing points in its movement, and a reversing mechanism embodying a reciprocably movable rack and .a lever having one end in engagement with and rocked by movements of said rack and having at its other end a gear segment which meshes with one or the other of said member reverse racks at the end of each member stroke to reverse the movement of the member. I

9. A combination as called for in claim 8, wherein the arms of said lever are of different lengths.

10. In combination, a reciprocable mem ber, means for moving said member at uniform speed during part of both forward and backward strokesthereof, said means idling with respect to the member during each reversal of the direction of movement thereof; said means including a part in continued engagement with said member; means including a part for engaging and reversing the movement of said member at the end of the uniform part of each stroke and idling with'respect to the member during the uniform portion of each stroke, the said means for moving thememberuniformly andthe rotatable means to operate in unison there- With and when so connected imparting a uniform movement to said member during the forward and backward stroke thereof; and reversing means for connecting said primary driving means and said member at the end of the uniform part of each stroke ofsaid memher to reverse the movement of said member; the connection between said member moving means and the primary driving means being disconnected during the reversing movements of the member; and the connection between said reversing means and said member being disconnected during the uniform parts of the stroke of said member substantially as described.

12. In combination, a reciprocable member, reverse racks at opposite end portions of said member, a main drive means, means driven by said main drive means and operable to engage one or the other of said racks at predetermined points in a movement of the member and to impart a reversing movement thereto, a rotatable element continu ously driven at uniform speed by said dri e means, and mechanism automatically operable to connect said element and member and impart one stroke from the former to the latter and to connect said main drive means and member to impart'the return stroke to the member.

13. In combination, a re'ciprocable member, a-main drive means, means driven by said main drive means and operable to engage said member at the end of each stroke and impart a reversing movement thereto, a rotatable element continuously driven in one direction by said drive means, and means permanently connected with the member and operable to connect with and be driven by said element during one stroke of the member and to disconnect said element and connect with and be driven by said main drive means during the next stroke of the member.

14. In combination, a reciprocable memher, a main drive means, reversing means driven by said main drive means and operable to engage said member at the end of each stroke and impart a reversing movement thereto, a rotatable element continuously driven in one direction by said drive means, means having permanent rack and pinion connectionwith said member and opment and connect with and be drivenby said" main drive means during the return stroke of the member, said member driving means being released from both said element and main drive means during the reversing movements of the member.

15. In combination, a reciprocable meme ber, a mam drive'shaft, means drlvenby' said shaft and operable to engage and impart a reversing movement to said member at the end of each stroke thereof, a rotatable element continuously driven by said shaft,

mechanism having a rotatable shaft in rack with respect to both said element and main,

' shaft during each reversing movement of said member.

16. In combination, a reciprocable member, a'main, drive means, reversing means continuously driven by said main drive means and operable to engage and reverse the movement ofsaid member at the end of each stroke thereof, a rotatable element continuously driven at uniform speed by said drive means, a driven shaft, rack and pinion connection between said shaft and member,

and mechanism automatically operable to.

connect said shaft and element during one stroke of said member and to release said element and connect said shaft and main drive means to drive the shaft in a reverse direction and impart a return stroke to said member, said mechanism having a part which'is released from both'said element and main,

drive means during each reversing movement of the member to permit an idling of said shaft. v

17. In combinatlon, a reciprocable member, a main drive means, means driven bysaid main drive means and operable to engage and reverse the movement of the member at the end of each stroke thereof, a rotaa gap-gear fixed to said shaft and automatically operable to connect said element and gear to drive said shaft during one stroke of the member and to disconnect said element and gear and connect the main drive means and gear to impart the returnstroke to said.

member, said mechanism operating in the gear gap durmg each reversing movement of said member, whereby said shaft idles during,

such reversing movements.

18. In combination, a reciprocable member, a main drive shaft, reversing means driven by said shaft and operable to engage and impart a reversing movement to said member at the end of each stroke thereof, a driven shaft, connection between said driven shaft and member for imparting reciprocation to one from a rotation of the other, a rotatable element continuously driven by said main shaft, and normally loose with respect to said driven shaft, a gap-gear fixed to said driven shaft, and means embodying a plurality'of gears which are driven by said main shaft and automatically operable to connect and impart rotation to the gap-gear from said element during one stroke of the member and to connect said main shaft and gap-gear to drive the latter during the other stroke of the member, said driven shaft running idle during the reversing movements of said member due to the gap in the gap-gear.

19. In combination, a reciprocating bed and a main driving means therefor embodying a driven shaft,-continuous rack and pinion connection between said bed and shaft, a loose gear and a fixed gap-gear on said shaft, a drive shaft continuously rotating in one direction, a direct drive pinion and a main re-' 'driveshaft for rotary and axial shifting movements, said coupling pinion being in constant mesh with said loose gear andshiftable into and out of coupling connection with both said loose and gap-gears, andsaid secondary reverse pinion being in "constant driving connection with said main reverse pinion and shiftable into meshing register with said gap-gear when the coupling pinion is shifted from register therewith, and vice versa, means for periodically shifting said axially movable pinions in one direction at one revolution of the gap-gear and in the op posite direction at the succeeding IGTOIHEIOH thereof whenits gap is in register therewith, and means for reversing the direction of movement of the bed during'the shifting period of said axially movable pinions.

20. A combination as called for in claim 19, together with means for continuously driving said reversing means from said drive shaft. y

21. In combination, a reciprocating bed; a rack connected therewith; a gear meshing said rack; an oscillatory shaft carrying said gear; means for driving said shaft in one direction during the forward stroke of the bed; means for driving said shaft in the opposite direction during the return stroke of the bed; said. driving means disengaging the shaft during the reversals of the bed;

with means for reversing the bed at the ends of its strokes and while the shaft driving means is disconnected therefrom, said means operating through the said bed rack and gears to control the movements of the oscillatory shaft during the reversals of the bed.

22. In combination, a reciprocating bed; a rack connected therewith; a gear meshing said rack; an oscillatory shaft carrying said gear; a gap gear on the said shaft; oppositely rotatable driven gears adapted to be alternately engaged with the said gap gear to drive the latter and the shaft in opposite directions; both said'gears being disengaged from the gap gear during the period of reversals of the bed; with means for reversing the bed at the ends of its strokes and while the said driven gears are disengaged from the gap gear; said reversing means operating through the said rack and gear to control the movements of the said shaft and gap gear during the reversals of the bed;

23. In combination, a reciprocating bed; a pair of racks connected therewith at opposite sides of the longitudinal center of the bed; a pair of gears meshing saidracks; an oscillatory shaft carrying said gears means for rotating said shaft in one direction during the forward stroke of the bed; means for driving said shaft in the opposite direction during the' return stroke .of the bed; said driving means disengaging the shaft during the reversals of the bed with means for reversing the bedat the ,ends of its strokes and while the shaft driving means is disconnectedtherefrom, said means op erating through the racks and gears to control the movements of the oscillatory shaft during the reversals of the bed.

24. In combination, a reciprocating bed; a pair of racks connected therewith at opposite sides of the longitudinal center of the bed; a pair of gears meshing said racks; an oscillatory shaft carrying said gears; a gap gear on the said shaft; oppositely rotatable driven gears adapted to be alternately engaged with the said gap gear to drive the latter and the shaft in opposite directions; both said gears being disengaged from the gap gear during the period of its reversal; with'means for reversing the bed at the ends of its strokes and while the said driven gears are disconnected from the gap gear, said reversing means operating through the said racks and gears to control the movements of the said shaft and gap gear during the reversals of the bed.

25. In combination, a reciprocating bed; a rack connected therewith; a gear meshing said rack; an oscillatoryshaft carrying said gear; means for rotating said shaft in one direction during the forward stroke of the bed; and means fordriving said shaft in the opposite direction during the return stroke of the bed; said means disengaging the shaft during the reversal movements of the bed; with means for reversing the bed at the ends of its strokes, comprising a reverse rack at each end of the bed; a reciprocatory rack bar; a toothed member engaged with said rack and having a portion adapted to alternately mesh with one or the other of the reverse racks at the end of a stroke of the bed; and means for actuating r the said shaft and bring it up tothe proper speed, substantially as described. v

26. In combination, a reciprocating bed; a rack connected therewith; a gear meshing said rack; an oscillatory shaft carrying said gear; a gap gear on the said shaft; oppositely rotatably driven gears adapted to be alternately engaged with the said gap gear to drive the latter and the shaft in opposite directions, both said gears being disengaged from the gap gear during the period ofreversal; with means for reversing the bed at the ends of its strokes, comprising a reverse rack at each end of the bed; a reciprocatory rack bar, a'toothedmember engage d with said'bar and having a portion adapted to alternately mesh with one or the other of the reverse racks at the end ;of a stroke of the bed; and means for actuating said rack to cause the reverse means to take control of and reverse the bed while the said driven gears are disconnected from the gap gear; the said bed rack and gear remaining constantly in meshand serving while the reversing mechanism controls the bed to reverse the direction of rotation of the said shaft and gap gear and bring it up to speed, substantially as described.

27. In combination, a reciprocating bed; a pair of racks connected therewith at opposite sides of the longitudinal center of the bed; a pair of gears meshing said racks; an oscillatory shaft carrying said gears; means for rotating said shaft in one direc tion during the forward stroke of the bed;

' of its strokes comprising a reverse rack at each end of the bed; a reciprocatory rack bar, a toothed member engaged with said rack bar and having a portion adapted to alternately mesh with one or the other of .the reverse racks at the end of a stroke of the bed; and means for actuating said rack bar to cause the reverse means to take control of and reverse the bed while thesaid shaft driving means are disengaged therefrom; the said bed racks and gears remaining constantly in mesh and serving while the reversing mechanism controls the bed to reverse the direction of rotation of the said shaft and bring it up to the proper speed, substantially as described.

28. I11 combination, a reciprocating bed; a pair of racks connected therewith at opposite sides of the longitudinal center of the bed; a pair of gears meshing said racks; an oscillatory shaft carrying said gears; a gap gear on the said shaft; oppositely rotatably driven gears adapted to be alternately engaged with the said gap gear to drive the latter and the shaft in opposite directions, both said gears being disengaged from the shaft during the period of its reversal; with means for reversing the bed at the ends of its strokes comprising a reverse rack at each end of the bed; areciprocatory rack bar. a toothed member engaged with said rack bar and having a portion adapted to alternately mesh with one or the other of the reverse racks at the end of a stroke of the bed. and means for actuating said rack to cause the reverse means to take control of and reverse the bed while the said shaft driving means is disengaged therefrom, the said bed racks and gears remaining constantly in mesh and serving while the reversing mechanism controls the bed to reverse the direction of rotation of the said shaft and gap gear and bring it up to proper speed, substantially as described.

29. In combination, a; reciprocatoryslide having a slot, a crank. pin engaging said engaging said slot to reciprocate the 'slide;

a shaft mounted on said slide parallel with .the slot; pinions on said shaft adjacent opposite ends of the slot, and fixed rack bars meshing with said pinions, whereby twisting or tilting of the slide due to the lateral pressure of the crank pin thereon is prevented.

31. In combination, a reoiprocable member, means for moving said member at u11iform speed during part of both forward and backward strokes thereof and idling with respect to the member during each reversal of the direction of movement thereof; said means including an oscillating part in continual engagement with said member; means including an oscillating lever for engaging and reversing the movement of said member at the end of the uniform part of each stroke and idling with respect to the member during the uniform portion of each stroke, the said means for moving the mem her uniformly and the said reversing means being independent; and a common means for drivmg both said member moving means and said member reversing means, snbstam tially as described.

In testimony whereof, I have hereunto signed my name to this specification.

MICHAEL A. DROITCOUR.