US583308A

US583308A - m miehle

Info

Publication number: US583308A
Authority: US
Publication date: 1897-05-25
Anticipated expiration: 1914-05-25

Description

(No Model.) I 4 sheets-Sheet 1. R. MIEHLE.

ME-GHANIGAL MOVEMENT.

No. 583, 308. Patented May 25, 1897.

(No Model.) V 4 Sheets-Sheet 2. R. MIEHLE. MEGHANIGAL MOVEMENT.

Patented May 25,189?.

(No Model.) 4 Sheets-Sheet 3.

R. MIEHLE. MEGHANICAL MOVEMENT.

No. 583,308. Patented May 25,189?.

UNITED STATES.

PATENT muon.

ROBERT MIEHLE, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE MIEHLE PRINT- ING PRESS AND MANUFACTURING COMPANY, OF SAME PLACE.

MECHANICAL MOVEMENT.

SPECIFICATION forming part of Letters Patent No. 583,308, clated May 25, 1897.

Application filed September 3, 1896. Serial No. 604,'779. (No model.)

TO all whom it may concrn:

Be it known that I, ROBERT MIEHLE, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois,

have invented certain new and useful Improvements in Mechanical Movem ents, of which the following is a full, clear, and exact specification.

My invention relates to that class of me- IO chanical movements employed for transforming a rotary movement into rectilinear or reeiprocating movement; and my present invention has more especial reference to that class of such devices employed for imparting I 5 the desired to-and-fro or reciprocating motion to the beds of printing-presses.

The object of my present invention is to convert the rotary movement of a drivingshaft into rectilinear or reciprocating movement in the type-bed or part to be reciprocated, and in doing so to Carry ,the bed back and forth throughout the greater part of its travel with a uniform' movement, and as the bed approaches the limit of its traverse in either direction to gradually decrease the motion until absolutely arrested, and then start the bed on its return movement and as gradually increase the motion from a point of rest -to the full maximum speed.

`With these ends in view my invention consists in certain features of novelty in the construction, oombination, and arrangement of parts by which the said ends and certain other ends hereinafter appeal-ing are attained, all

as fully explained with reference to the accompanying drawings, and more particularly pointed out in the claims.

I In the said drawings, Figure l is a vertical longitudinal section of the part to be reciprocated, showing my improvements in side elevation. Fig. 2 is a plan sectional view takenon the line 2 2, Fig. 1, certain portions of the improvements being illustrated in elevation. Fig. 3 is a view similar to Fig. 1,

5 showing the reciprocatory part at the full limitof its travel-se in one direction. Fig. 4 is a similar view, partly broken away, show- .ingthe position ot' the parts shortly after the reci procatory portion has 'started on its return movement. Fig. 5 ;is a similar View illustrating the position of the parts when the reciprocatory portion is about to reach the extremity of its return movement. Fig. 6 is a transverse sectional view taken on the line 6 G, Fig. 1. Fig. 7 is a longitudinal section taken on the line 7 7, Fig. 8. Fig. 8 is a vertical transverse sectional View taken on the line 8 S, Fig. 2. Fig. 9 is a vertical longitudinal section taken on the line 9 9, Fig. 6.

Fig. 10 is a View similar to Fig; 2, illustrating o certain nodifications hereinafter explained. Fig. 11 is a side elevation thereof, partly broken away; and Fig. 12 is a section taken on the line 12 12, Fig. 11.

Like signs of reference indicate like parts throughout the several views.

In illustrating my invention I have shown it in connection with the type-bed of a printing-press, which is the part to be reciprocated and which is one in which the major part of 7o thestroke or traverse is eiteeted by a gear engaging alternately with two parallel raokbars, but it will nevertheless be understood that the printing-press bed is only an example of the many reciprocatory parts of machinery to which my invention is applicable, and inasmuch as there are various other forms of mechanism for imparting the major portion of the stroke to such beds or partssuch, for instance, as a single rack-bar and shifting or alternately-acting gears-it will' also be understood that this part also of the mechanism which I have shown in the drawings is merely an example and is capable of a wide range of variation or even radical change or substitution without departing from the fundamental principles of mypresent invention, which concerns itself solely with that part of the operation which relates to the gradual stopping and starting ot" the menber to be reciprocated.

The double-rack and oscillating-gear mechanism in connection with which I have illustrated my present inventionis of that variety in which the racks are located one above the other and in the same vertical plane, and the driving-gear is Situated between the racks and shifts from one to the other on an arc concentric with a pinion on the main drivingshaft, and by which pinion the shifting-gearis Ioo driven, the oscillating or shifting gear being provided with suitable means for raising and loweringit at the proper time, all of which may be of any well-known or suitable Construction, but which I will now describe more in detail with reference to the drawings.

1 represents the supporting-franework of the press, upon which the type-bed 2 or porg tion to be reciprocated is mounted and slides j in suitable guideways 3. press the under side of the bed 2 is provided with hangers 4, which at their lower ends In this example of r have lateral projections 5, supporting the lower one, 6, of the parallel horizontal rackbars, the upper one, 7, of such rack-bars being Secured to the under side of the bed 2, as usual.

Extending transversely of the frame i of less diameter than the distance between said racks is capable of alt'ernately engagingf therewith when raised and lowered.

This osi cillating gear-wheel 11 is journaled upon a s'tud-shaft 12, which in turnis rigidly mounted in and carried by an oscillatin g arn 13, whose center of oseillation is concentric with the driving-pinion 10. pivoting the arm 13 upon the shaft 9, so'that the oscillating gear 11 will remain in mesh This may be effected :by

with theipinion 10 notwithstandingits change j of position.

The lower end of the arin 13 is provided with a downward projection, as clearly shown in Fig. 1, upon which is nounted a lateral;

stud 14, which engages in a can-grooveforned 3 in theinnerface of a disk 15, mounted on a `shaft 16and being driven in unison with the shaft 9 bya suitable train of gearing 17.

The g cam-groove in the disk 15 conprises two con- 1 centric portions 18 19, the latter being of the larger radius, the adjacent ends of which are 3 joined by eccentric `portions 20 21.

hen i the stud 14 `is in engagement with the larger; concentric portion 19, the arin 13 is raised, 5 bringing the `gg'ear-wheel 11 into engagenent with the upper rack 7.

hen the said stud 14 comes into `engagement with the smaller;

concentrieportion 18 of the cam-slot, the arm 13 is lowered, and :the gear-wheel 11 is thereby carrieddownward into mesh with the :lower rack.

By means of -the nechanism thus :far de-i scribed the part to `be recprocated or bed 2 1 is, by the engagement of the gea wheel 11; withone of the racks 6 '7, driven in one di-* `reetion until the end of the engaging rack ar- `rives ata-pointdirectly in line with ,the iveri ticalidiameter of the gear-wheel 111.

\V-hen` 'this point is reached, such gear-wheel is by the action of =the cam-slot in the disk :15 with- I -drawn -fron engagement with said rack, and

during its next half-revolution is swung into` `positionto engage the other rack, and thusj drive said 'bed inthe reverse direction until the end of said other rack reaches aipoint di- -ternal gear in the plate ,engagenent with said internal ;gear 23 and rectly in line with the `vertical diameter of the gear-wheel 11, as beforedescribed. This mechanism constitutes an example of the means herein referred to for driving the part or bed to be reciprocated throughout the greater portion of its traverse.

I will now describe the means for continuing the movement of the bed after the rack is released by the gear-wheel 11 and while such gear-wheel is passing from one rack to the other and gradually bringing the bed to a standstill and as gradually starting it again upon its return movement.

Supported directly between the racks 6 7 and in the same vertical plane therewith and so as to move in unison with the oscillating arm 13 is a plate 22, which is provided with a circular aperture arranged directly opposite thegear-wheel 11 and :beingpreferably of the same diameter as said gear-wheel and 'having its edge provided with cogs or teeth, as shown at 23. The plate 22 may be thussup- ,ported by means of ainunber of studs24, projecting from the arm 13 across thevgear-wheel 11 in such a manner as to support :theplate 22 without interfering with the rotation ;of the gear-wheel 11 and whereby the *latter is arranged between the arm ;13 and 'the plate 22. The revolving member.orgear-wheel llisprovided with a short shaft or pin 25,journaled loosely therein and ;projecting laterallyron the inner face thereof like a wrist pin, and

'keyed to this shai't 25, soas to revolve therewith, is a pinion 26, which is in constant engagement with the cogs 23, consttutmgan 1n- 22,-and which, by :its

the eccentric relation of the shaft 25 with reference to the gear 1lcauses the :shafit25 to rotate in a direction the opposite of :its bodily travel, or, in other awords, oppositeto the direction of rotation of the .gear-wheel 11 while being revolved bodily by .said gear 1:1. Mounted onvthe end of this shafit'25, and also keyed thereto `so as 'to revolve in unison with the pinion 26, is ayoke 27 having a fol-kor bifurcatedlend `28 and which, in iconj unction with the pinion 26 and shaft25,constitutes a rotating bodily-irevolviug lever. 'Located ateach end of the racksi 7 aisa lug 2 30, respectively, which lugs `are adapted :to travel back an d forthin, a :horizontal :line with the racks 6 7 and to alternately engage'be- -tween the forks 28of theyoke 27,and byineans of which the `yoke 27 andpinion 26, actingas a lever, 'taking the shaft 25 for its fulcrum, i

movement and continue such movement ;un-- `tilthe gear-wheel 11 againcones intoengagement.

These parts areiso proportioned that the prongs or forkszof the yoke 27 willalways pernit one of-thelugs 29 30 to eitlierenterabe `tween them or recede therefron when theyoke is in its horizontal position and will at IOO IIO

all times produce lateral pressu re against one' of the lugs as long as eitherof the latter is within their reach.

Assuming the parts to be in the position illustrated in Fig. l with the rack 7 just about to leave the gear-wheel 11, which is continuously revolving in the direction of the arrow 31, and the yoke 27 in an upright position, with its forks 38 embraoing the lug 30, the operation is as follows: The further movement of the gear-wheel ll in the direction of the arrow 31 will push the rack 7 entirely out of its reach, and at this instant the cam-slot in the disk begins to lower thegear-wheel ll to the lower rack G. The rotation of the gearwheel 11, which still continues during its transit, carries the pivot or shaft of the pinion around in the direction of the arrow 32, or, in other words, it carries the independently-rotatin g bodily-revolvin g lever, hereinbefore referred to, in the direction of such arrow 32, and by virtue of the engagement of the pinion 26 with the non-rotative internal gear 23 the yoke 27 is caused to rotate about the axis of the shaft 25 in the direction of the arrow 33, and consequently the forks 28 push the lug in the direction of the arrow 3% or inthe same direction which the rack 7 had previously been moved by the gear 11 when in engagement therewith. The lower ends of the forks 28 thus continue to push the lug 30 to the left until they assume the position illustrated in Fig; 3, when the yoke will be horizontal, and its forks will 'from this point begin to recede; but inasmuch as the pinion 20 in tumbling the yoke 27 over the lug 30 also causes the lower one of the forks 28 to project upwardly on the left-hand side of such lug 30 it will be seen that this one of the forks presses the lug 30 in the direction of the arrow 35, Fig. 4, or, in other words, starts the racks 6 7 on their return movement and continues this movement until the yoke 27 arrives at a vertical inverted position with its forks projecting in the opposite direction to that indicated in Fg. 1, the yokc in the meanwhile having made a halt-revolution around the lug 30 while passing from the position indicated in Fig. 1. By the time the yoke 27 arrives at this position-t'. e., a vertical inverted position-with its forks projecting upwardly, the gear-wheel ll will have descended sufficiently far to engage with the lower rack (i, and the lug 30 will begin to pull away from the forks`28 when the racks start to move under the influence of the gearwheel 11, and the gear 11 will take up and continue the movement of the racks until the rack 6 is about to pass out of engagement with such gear 11, as indicated in Fig. 5. hen the parts reach this position, (shown in Fig. 5,) it will be seen that the yoke 27 is still revolvin g or travelin g bodily around the axis of the gear-wheel ll and in the direction of rotation of said gear, but by virtue of the engagement of the pinion 26 with the fixed gear 23 the yoke is rotatin'g on its own axis in the opposite direction, or, in other words, is moving the upper ends of its forks 28 to the right, and being in position to receive the lug 2 between them and just about to begin to engage with said lug and continue its movement to the right. The forks of the yoke 27, however, do not become effective on the lug 29 and begin to force it to the right until the centers of the rotating yoke and the main gear ll fall into a direct line, or a substantially direct line, passing through said centers and the final tooth on the lower rack, as indicated by the dotted lines m y in Fig. 5, or, in other words, until the yoke arrives at a position which is the Converse of its position indicated in Fig. 1. It then begins to push the racks G 7 farther to the right by virtue of its engagement with the lug 29, and it continuesto push 'it to the right until the yoke arrives at a horizontal position with its forks 28 projecting in the opposite direction to that indicated in Fig. 3, whereupon all movement of the bed ceases, and the .further bodily travel and independent rotation of the yoke 27 from this point on will move the racks from a position of rest in the reverse direction to that indicated by the straight arrow in Fg. 5, or, in other words, to the left, and will gradually increase this movement to the left until a speed is reached substantially equal to that which may be imparted to the racks 6 7 by the gear-wheel 11, and when this speed is reached the yoke 27 will again be in the position indicated in Fig. 1, or with its forks projecting downwardly, and inasmuch as the forks will then be moving in the same direction as the lug 29 is being moved under the influence of the gear 11, which by this time has engaged with the upper rack 7, it Will be seen that such forks will rise away from the lug 29 and permit the latter to move out from between them. -By the time the reciprocating racks reach the limit of their movement on the right, imparted to them by the gear-wheel 11, the yoke 27 will have tumbled over to a position to receive the lug 29 between its forks 28, and thus continue the movement to the right until the extreme limit of the movement is reached, and then return the racks again and continue their movement in the return direction until the upper one of the racks has been again en gaged by the gearwheel 11. Thus it will be seen that the forks of the yoke 27 are continuously revolving about a center which is in direct line with the centers of the lugs 29 30, and consequently is always in a position at the proper time to receive one or the other of such lugs and force it first in one direction and then in the other.

The yoke 27 itself of course begins to decrease the movement of the bed or portion 2 at the time the rack leaves the gear 11,'and such yoke engages with andgains control of the pins or lu gs 29 30, and will continue to control the movement and gradually decrease it until the forks 28 of the yoke reach a substantially horizontal position and would IOO IIO

otherwise let the pins 29 30 slip Out; but in order that this slipping away of the pin from the forks' may be prevented and the movement of the bed absolutely arrested I secure to the bed or portion 2, at some suitable point and at each end thereof, a curved shoe or projection 36 37. These shoes or projections 36 37 are preferably supported by the casting 4 5, which supports the lower one,` 6, of the racks, and, if desired, they may be separate pieces set into the casting, as shown in the drawings, whereby they may be composed of metal of the proper hardness or quality, the lugs 29 30 being also supported by suitable brackets 38, carried by the same castings, whereby the shoes 36 37 and lugs 29 30 will nove in unis'on and maintain a fixed relation. Mounted upon the shaft or pivot 25 is a stop-roller 39, which is adapted to come against the shoes 36 37 at about the time When the gear-wheel 11 begins to pass from one rack 6 7 to the other. This stop 39 is preferably formed integrally with a bracket 40, which is rigidly Secured by bolts or rivets 41 to the inner face of the gear-wheel 11 at a point on the opposite side of the center thereof to that at which the shaft 25 is Situated, such bracket being turned inwardly under the pinion 26 and projecting through the apertured plate 22, as clearly shown in Fig. 8. By this means it will be seen that the stoproller 39 is virtually one piece with the gearwheel ll and will revolve about the center thereof in contact with the curved surface of one o'r the other of the shoes 36 37, which are curved concentrically with the gear 11 and are preferably semicircular in extent, so that the stop 39 will begin to engage therewith at the time the gear ll begins to disengage with either of the racks 6 7, and by being thus revolvedwith the gear 11 will walk around the shoes 36 or 37 and will coperate with the forks 28 in gradually decreasing the movement of the bed and avoiding any possibilty of the lug 29 or 30-slipping away fron the forks 28 until one or the other of the racks 6 7 has been rengaged by the gear-'wheel 11, it being obvious that without the stop-shoes 36 37 and the stop 39 the Inotion imparted to the bed by the forks of the yoke 27 might, when such forks reach a horizontal position, continue the movement sufficiently far to prevent the forks 28 from returning the lug 30, for instance, from the position shown in Fig. 3 to the position shown in Figs. 4 and 5, inasmuch as the fOl'kS are open-'ended and might pernit the lug 30 or 29 to slip 'from between them.

In the form of my invention shown in Figs. 10 to 12, inclusive, I have located the oscillatin g or vibrating gear on one side of the oscillating arm 13 (indicated in this modification as 13) and the gear-plate or internal gear (referred to in the other form by the nuneral 22) on the opposite side of said arm 13, such internal gear-plate being indicated in Figs. 10 to 12 by the nuneral 22. The purpose of doing this is to bring the racks 6 7 closer to the shoes 36 37 and to avoid the necessity of enploying the supporting-lugs 24 for the internal gear, thus rendering the structure more conpact and durable and shortening the length of the shaft 25, which supports the revolvin g rotating lever before described-that is to say, shortenin g that portion of the shaft which protrudes froni the inner face of the gear-wheel 11 to the y oke 27, and thereby rendering it more rigid and better able to withs'tand the strain to which it is su bj ected by the engagenent of the 'yoke 27 with the lugs 29 30. In order, ho'wever, that the pinion which engages with the internal non-rotative gear for revolvin g the yoke 27 may still be equal to half the diameter of the gear-wheel ll and at the same time revol've about the aXis of such gear-wheel without intersecting the shaft of the latter, I mount the gear-wheel ll upon a greatly-enlarged journal or hub 12, which is provided in the arm 13 with a correspondingly-enlarged hearing, and which revolves with the gear 11, and through this enlarged hearing, and also through the gear 11, I pass the shaft 25, which is eccentr'ic to the aizis of the journal 12, and which carries at its outer end the pinion 26, that engages with the internal non-rotative gear 23 cut in the plate 22 while upon the inner end of the shaft 25 is mounted the stop-roller 39 and the yoke 27, the roller 39 in this instance being loosely journaled upon the shaft 25, while the yoke 27 and pinion 26 are fixed to such 'shaft and constitnte therewith the aforesaid revolving independently-rotating lever.

The non-rotative gear-plate 22 is preferably forined of a separate plate Secured to the outer face of the arm 13, or, more properly speaking, to the enlarged hearing of such arm, the arm and the plate being provided with corresponding flanges 42 43, respectively, for the passage of bolts or rivets 44, which secure the plate 22 rigidly to the side of the arm. By this Construction it will be seen that the length of that portion of the shaft which projects from the face of the wheel 11 (and which wheel constitutes the only support for such shaft) is considerably reduced and the desirability for the employment of thesupporting-bracket 40 heret'ofor'e described is avoided. The means for supporting the non-rotative gear-plate 22 is also by this arrangement simplified and rendered more durable and substantial.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination With the part to be reciprocated and means for reciprocating said part throughout the greater part of its movement, of a bodily-revolving [ever also rotating on an independent axis in the opposite direction of its bodily travel and means in connection with said part to be reciprocated, for engagement with said lever, substantially as set forth.

2. The combination With the part to be reciprocated and means for reciprooatin g said part throughout the greater portion of its movement, of a bodily-revolving lever also rotating on an independent axis in the opposite direction of its bodily travel and means at each end of said part to be reciprocated for engagement with saidlever, substantially as set forth.

3. The conbination with the part to be reciprocated and means for reciprocating'said part throughout the greater part of its movement, of abodily-revolving notched lever also rotating on an independent axis in the opposite direction of its bodily travel and means in connection With said part to be reciprocated for engaging in said notch, substautially as set forth.

4. The combination with the part to be reciprocated and means for reciprocating said part throughout the greater portion of its movement, of a bodily-revolving forked or notched lever also rotatingon an independent axis in the opposite direction of its bodily travel and lugs carried by said part to be reciprocated and projecting into the plane of and adapted to be engaged by the fork of said lever, substantially as set forth.

5. The combination with the part to be reciprocated and means for reciprocating said part throughout the greater portion of its movement, of a bodily-revoluble lever rotatable on an independent axis and comprising a toothed portion forming a pinion, a second toothed portion engagin g With said pinion and causing the same to rotate, and means in connection With said part to be reciprocated for engagin g with said lever, substantially as set forth.

G. The combination With the part to be reciprocated and means for reciprocating said part throughout the greater portion of its movement, of a bodily-revoluble lever rotatable on an independent axis and comprising a pinion, a non-rotative toothed portion engaging with said pinion and causing the latter to rotate and means in connection with said part to be reciprocated for engagement with said lever, substantially as set forth.

7. The conbination with the part to be reciprocated and means for reciprocating said part throughout the greater portion of its movement, of a bodily-revoluble lever rotatable on an independent aXis and com prising` a pinion, an internal gear surrounding said pinion and meshing therewith Whereby said lever is rotated in the opposite direction of its bodily travel, and means in connection with said part to be reciprocated for engagement with said lever, substantially as set forth.

8. The combination with the part to be reciprooated and means for reciprocating said part throughout the greater portion ot' its movement, of a bodily-revolnble lever rotatable on an independent axis and comprising a pinion, an internal non-rotative gear surroundin g said pinion and causing said lever to rotate, and means in connection With said part to he reciprocated for engagement With said lever, substantially as set forth.

9. The combination with the part to be reciprocated and means for reciprocating said part throughout the greater portion of its movement, of a rotating member, a lever pivoted eccentrically to and carried by said member, a non-rotative gear, said lever comprisin ga pinion engaging with said gear and causing the rotation of said lever, and means in connection with said part to be reciprocated, adapted to engage with said lever, substantially as set forth.

10. The combination with the part to be reciprocated and means for reciprocating 'said part throughout the greater portion of its movement, of a rotating member, a lever pivoted eccentrically to and carried by said member and comprising a pinion, a non-rotative internal gear engaging With said pinion for causing the rotation of saidlever, means in connection with said part to be reciprocated adapted to engage with said lever, a stop carried by said rotating member and a shoe or.

projection on the part to be reciprocated, adapted to engage with said stop, substantially as set forth. i

11. The oombination with the part to be reciprocated and means for reciprocating said part throughout the greater portion of its movement, of a rotating member, a lever pivoted eccentrical] y to and carried by said rotating member and comprising a pinion,.a non rotative internal gear engaging with said pinion for causing the rotation of said lever, means inconnection with said part to be reciprocated, adapted to engage With said lever, a stop carried by said rotating member and having an aXis concentric with the axis of said lever and a shoe or projection on the part to be reciprocated adapted to engage ,with said stop, substantially as set forth.

12. The combination With the part to be reciprocated and means for reciprocating said part throughout the greater portion of its movement, of a rotating member, a lever pivoted eccentrically to and carried by said member and comprising a pinion, a non-rotative internal gear engaging With said pinion for causing the rotation of said lever, means in connection with said part to be reoiprocated, adapted to be engaged with said lever, a stop revolving with said rotatin g member and lever and a shoe or projection carried by said part to be reciprocated and being curved concentrically With the bodily travel of said stop, substantially as set forth.

13. The combination with the part to be reciprocated and means for reciprocating said part throughout the greater portion of its movement, ot a bodily-revolving lever also rotating on an independent axis in the oppo- IOO site direction of its bodily travel, means carred by said part to be reciprocated for engagement with said lever, a stop-roller revolving in unison with said lever, and a shoe curved concentrically with the bodily travel of said stop-roller and being semicircular in eXtent. substantially as set forth.

14. The combination with the part to be reciprocated and means for reciprocating said part throughout the greater portion of its movement, of a bodily-revolving lever also rotating on an independent axis in the opposite direction of its bodily travel, means in connection with said part to be reciprocated adapted to engage with said lever, said lever having a supporting-shaft, a revolving member supporting said shaft and having a stop carried thereby, and shoes carried by said part to be reciprocated and adapted to be engaged by said stop, substantially as set forth.

15. The combination with the part to be reciprocated and means for reciprocating said part throughout the greater portion of its movement, of a rotating member, a shaft secured eccentrically to and supported by said rotating member and a pinion and yoke mounted on said shaft and constituting alever, a non-rotative gear engaging with said pinion, and means carried by said part to be reciprocated for en gagin g with said yoke, substantially as set forth.

16. The combination with the part to be reciprocated, neans comprising a rack and a gear for reciprocating said part throughout the greater portion of its movement, of a yoke revolving bodily with said gear and rotating on an independent axis in a direction opposite to the direction of rotation of said gear, and means in connection with said part to be reciprocated adapted to engage with said yoke, substantially as set forth.

17. The combination with thepart to be reciprocated having parallel racks and an oscillatory gear mounted between and adapted to engage with said racks alternately, of a lever revolving bodily with said gear and rotating on an independent aXis in the direction the 4 reverse of the direction of rotation of said gear, and means carried by said reciprocatin g part for engagement with said lever, substantially as set forth.

18. The conbination with the part to be reciprocated having parallel racks, an oscillatory arm, means for raisin g and lowerin g said arm, a plate secured to said arm and having an internal gear cut therein, a gear-wheel j ou rnaled on said arm between said plate and arm, a shaft projecting through said gearwheel, a pinion on said shaft engaging with said internal gear,ayoke secured to said shaft, and means carried by said part to he reciprocated for engaging with said yoke, substantially as set forth. V

19. The combination with the part to be reciprocated and means for reciprocating said part throughout the greater portion of its movement, said means being provided with a rotating member, of an oscillatory arm supporting said member, an enlarged journal on said rotating member passing through said arin, a shaft passing through said rotating member and journal, a pinion on one end of said shaft, a non-rotative internal gear with which said pinion en gages, a yoke at the other end ot' said shaft, and means in connection with the part to be reciprocated for engagement with said yoke, substantially as set forth.

20. The combination With the part to be reciprocated and means for reciprocating said part throughout the greater portion of its movement, of a bodily-revolving lever also rotating on an independent axis in the opposite direction of its bodily travel, a lug in connection With said part to he reciprocated for en gagement with said lever, and means for holding said lever in engagement with said lug, substantially as set forth.

21. The combination with the part to bere- ;ciprocated and means for reciprocating said part throughout the greater portion of its `movement, of a bodily-revolving lever also rotating on an independent axis in the opposite direction of its bodily travel, means in connection with said part to be reciprocated for engagement with said lever, and a curved shoe and stop-roller coperating to hold said lever in operative engagement with said part to be reciprocated, substantially as set forth.

ROBERT MIEI-ILE. Wi tncsses:

A. HOPKINS, EDNA B. J OHNSON.