US2517210A - Synchronous bed motion for printing presses and the like - Google Patents

Description

1, 1950 A. J. JENNER 2,517,210

SYNCHRONOUS BED MOTION FOR PRINTING FRESSES AND THE LIKE Filed Feb. 26, 1946 5 Sheets-Sheet l INVENTOR ArfhurJ/e/mer Aug. 1,, 1950 A. J. JENNER 0 SYNCHRONOUS BED MOTION FOR PRINTING PRESSES AND THE LIKE Filed Feb. 26, 1946 5 Sheets-Sheet 2 INVENTOR 4/"f/7w' L/Jewn ex" wkwu km Aug. 1, 1950 A J, JENNER 2,517,210

SYNCHRONOUS BED MOTION FOR PRINTING I PRESSES AND THE LIKE Filed Feb. 26, 1946 5 Sheets-Sheet 3 fig. 7.

INVENTOR E Arfhu/"dJenner Aug. 1, 1950 A. J. JENNER 2,517,210

' SYNCHRONOUS BED MOTION FOR PRINTING PRESSES AND THE LIKE Filed Feb. 26, 1946 5 Sheets-Sheet 4 29 J04 so 57 51 105 52 0 I'iglZ.

' C INVENTOR B S E Z? A'rf/zur ddewner Aug. 1, 1950 A. J. JENNER SYNCHRONOUS BED MOTION FOR PRINTING PRESSES AND THE LIKE 5 Sheets-Sheet 5 Filed Feb. 26, 1946 INVENTOR Arfizur J Jen/7 9/ been accomplished in numerous ways. chanlcalmovements for this purpose are, for the Patented Aug. 1,. 1950 SYNCHRONOUS BED MOTION FOR PRINT- ING PRESSES AND THE LIKE Arthur J. Jenner, Chicago, 111., assignorto Miller Printing Machinery 00., Pittsburgh, Pa a corporation of Pennsylvania.

Application February 26, 1946, Serial No. 650,251

26 Claims.

This inventionrelates to printing pressesland more, particularly to improved synchronous mechanical bed motion movements therefor, al-

, It contemplates more especially theprovision 101 improved instrumentalities toaccomplish more effective synchronous bed motion for printing wear, stresses, and strains. i

In reciprocating printing beds, the, problem of converting rotary to reciprocating motion has Mostmemost part, cumbersome by reason of many parts and the requirement for a heavy cradle which impedes the speed of movement or creates excessivestressesand wear. Furthermore, a larger number offgears are required to accomplish this,

conversion of motion so that agreater number of gear tooth play points are involvedthan is synchronous bed motion for printing presses and the. like wherein minimum parts, gears and fweights are involved to appreciably reduce wear, stress and ,gear tooth play points.

A further objectis to provide an improved bed motion whereintheinstrumentalities are so combined as to provide a substantially straight line of points of wear.

A still furtherobjectisto provide bed motion instrumentalities for printing pressesfand the like that are balancedto insure smooth operation at comparatively high speeds and to accomplish this end with minimum wear;

Still a further object is to provide a balanced 1 synchronous printing press bed motion wherein all diagonal stresses are reduced'to a minimum and all appreciablepoints of wear are'along a substantially stright line for uniformity and 1 longevityof operation.-

- Other objects and advantages will appear from i the following description of an illustrative' embodiment of the present invention.

' In the drawings:

- Figure 1 is a plan viewof aprinting press bed embodying features of the present-invention',

( oin-27) presses and the like with minimum parts, weight parts thereof being broken away and shown in section to clarify the showing.

Figure 2 is a side view in elevation of the printing press bed shown in Figure 1, with a rotary printing roller mounted thereon.

Figure 3 is asectional view in elevation taken substantiallyalong line III-III of Figure 1 with the parts shown in an intermediate position of displacement.

Figure 4 is a sectional View in elevation corresponding to Figure 3, with the parts shown in full outline in one extreme position of displacement and in dotted outline in another extreme position of displacement.

Figure 5 a perspective view of the sectional channel ring member shown in assembled relation with other parts in Figures 1 and 6.

Figure 6 is a fragmentary sectional view taken substantially along line VIVI in Figure 1.

: FlguI'e "I is a sectional view in elevation taken substantially along line VIIVII of Figure 1;

Figure 8'is a fragmentary sectional view taken substantially along line VIIIVIII of Figure 1. Figure 9 is a perspective view of a motion transferring lever shown in its assembled association with other protein Figures 3 and 4.

Figure 10 is a sectional view taken substantially along line X--X of Figure 1.

Figure 11 is a sectional view in elevation taken substantially along line VIIVII of Figure 1 and corresponding with Figure '7, except that the 1 parts are shown in their other shifted extreme position.

Figure 12 is a diagrammatic stroke diagram of the printing bed motion and operating instrumentalities.

Figure 13 is a. face view, looking at the face opposite that appearing in Figure 9, and to larger scale, of the motion transferring lever or reversing hook shown in Figure 9, showing the means for operating the movable jaw of the lever.

Figure 14 is a view similar to Figure 13 show- The structure selected for illustration is not intended to serve as a limitation upon the scope orteachings of the invention, but is merely illus- "trative there-of.

' teachings depending upon'the dictates of commercial practice. The present embodiment comprises a bed frame, H] which has heavy external side members Hl2 cast or otherwise shaped from suitable material to present a rigid framework. A plurality of intermediate table guide grooves I 3, l4, l5, and It, in this instance four,

vnelled ring All, in this instance of tri-sectional'it a sleeve 4-5 having a shaft 46 rotatively jour bore 5| provided in the upstanding plate member axially shifts; however, the pinion 55 only shifts,

. gears 56 and 51.

'1 mounted for corresponding rotation on a shaft tween the frame member plates II-I1 (Figure 3 are provided for support by plate members l1, I8, I9, and 28, respectively (Figure Upper cross members 2I22 and lower cross members 23, 24, 25, 26 and 21 extend between the side and plate members II-IZ and I1-I8-I9-2Il to ri- 5 gidify the bed frame structure II].

A flat substantially rectangular printing table 28 is provided with guide rails 29, 30, 3|, and 32, in this instance four, which are attached to the underside thereof as complements of the guide H grooves [3, I4, I5, and I6, respectively. These complemental guide grooves I3-I4-I5-l6 and rails 28-36-3I-32 define the reciprocal path of movement of the table 28 responsive to instrumentalities to be hereinafter described. A rotary printing roller 83 is mounted on a shaft 34 to rotate in synchronism to the reciprocal move-' ment of the table 28. A gear'segment 35 is attached to the printing roller 33 to mesh with a rack segment 36 fixed to the reciprocal table 28' to index the position of one relative to the other I during each stroke.

The inking or the printing mechanism forms no part of the present invention which concerns itself with the sychronous bed motion instrumentalities. The primary purpose of this bed heavy hangers and by the use of a single rack 31 which is attached to the underside of the-c bed 28 to extend longitudinally thereof. Reversal stress is further reduced by carrying the bed 28 over a greater reversal period of distance 'of the end strokes of the bed 28 which is accomplished through reversing hooks utilized to convert. 5

- rotary motion into reciprocal motion as will appear more fully hereinafter. I

The rack 31 meshes with a split spur gear 38 having a section 39 connected thereto by a chan- 40 construction (Figure 5) to enable its assembly with the annular grooves ll-42 provided in the bores 43-44 of the split gear 38-39, respectively (Figure 6). This permits the gear 38 to idle on nailed therein. The end of the shaft 46 is provided with a key 41 which fits into a key-way 48 provided in the reduced bore 48 of the hub As shown, the sleeve is press-fitted. into 2.

I8 (Figure 6), and a retainer nut 52 engages the threaded projecting sleeve and 53 adjacent the plate member IB, thereby serving as a bearing for the shaft 4-6. The shaft 46 freely extends through an adjacent upstanding plate member I1 (Figure 11) for journalled support in a bearing 54 provided in the frame side member II so that the shaft 46 may extend therebeyond to carry a, pinion 55 on its extremity. It should be noted that the shaft 46 rotates as well as for the extent of the gear 56 of the two adjacently mounted and substantially larger spur The adjacently disposed spur gears 56-51 are 58 which is journalled in bearings 59 provided in the frame members II and I8 (Figures 1 and 11) The shaft 58 carries a bell crank 68 at its inward extremity and has a gear 6I fixed thereto beis a lever I68.

scream 3 1) to mesh with another gear 62 carried by a stub shaft 63 (Figure 11). The stub shaft 63 is J'ournalled in bearings 64-65 provided in the frame members II-I8. A cylindrical cam 66 is fixed to the stub shaft 63 to operate a cam follower lever 61 pivoted to an ear 68 carried by the frame member plate I1 (Figure 8).

' The cam follower lever -61 has a bracket trip 69 (Figures 1 and 8) fixed to its end to fit into the channel 10 of a collar 1I fixed to the rotatable and shiftable shaft 46 to displace the pinion 55 within the limits of the spur gear 56 and the split pinions 38-39 are also displaced for meshing engagement of one or the other with the rack 31. The pinion 38 is always in mesh with a spur gear 12. The spur gear 12 is fixed to a driver shaft 13 journalled in bearings 14 provided in the frame. members lI-I8. The driver shaft 13 is disposed parallel to the shaft 58, the former being similarlysprovided with a bell crank 15 at its extremity so that shafts 58-13 through their bell cranks 68-15 oppositely oscillate reversing hooks 16-11 to be hereinafter described.

The outer extremity of the driver shaft 13 has a large spur gear 18' fixed thereto beyond the frame side member to correspond in'size and pitch'with the spur gear 51 for permanent meshing engagement therewith. A suitable source of power, such as an electric motor and driving pinion (not shown) may be operatively connected to cavity 82 with the outer lip 83 somewhat longer than the inward lip 84. One of the jaws 83a of eachhook or lever is integral with the bodyj thereof, the other jaw 84a being pivoted thereto as will presently be described. Thebody 85 of each hook has a boss 86 projecting laterally therefrom to receive a bore 81. Each body 85 terminates downwardly in furcated shanks 88-89 which have circular bearings 90-9I formed integraltherewith to receive pins 92' and 93 therethrough. The pins 92-93 are fixedly mounte'dln the frame member plates I8-I 9 proximate to the bottom thereof to pivotally support the hooks r The movable jaw 84a of each hook is pivoted to "the jaw 83a thereof at.--I06.

The-jaw 84a. is adapted to turn about theaxis of the pivot I86 relatively to the jaw 83a from a relatively open position at the time th corresponding rollerI-M or I 0 I, presently to be described, enters the cavity 82 to a relatively closedpcsition when the hook moves outwardly. The jaws are shown in their o. relatively closed position in Figure 13 and in their relatively open position in Figure 14;. The provision of the pivoted jaw 84a insures free movement of the corresponding roller into and out of the cavity when the hook is in the position of Figure 14while-a1so insuring proper operation at all other times. Pivoted to the body 85 at I01 The lever: has a short upwardly projecting arm I09 and tw lateraIly projecting arms III) and II I. The arm IIII' carries at its extremity a cam following roller H2. The arm III cooperates with a stop-block II3 connected with the body 85, A coil spring I I4 normally urges the lever I08 to turn in the counterclockwise direction,

fviewing Figu es 13, and j 14, to a position inwhich reversing hooks 16 ebltriiately engage the bed 28 by' means of the rack 3"? c fhrih'gfiiititing and inking streke's of the press at a uniform speed after and. Before the reversing stroke occur.

The probleniofrever'sirige pri'ntingibed may be advantageously explained byreferezice t'o'jthe diagrammaticstroke 'di tgrzim shown in Figure 12. From" 0 td D" is the printing stroke armth-em D to E is the deeeie'riitetf movement the virtual stop at when acceleration is sterte'd'to reach peai; at F. From" F 60A is the ihking stroke, from A' to Ethere is deceleration, and then" at:- celati'o'n from B to Cto complete the bedstroke bed speed mi st be uniforiri'a 1d-as shifter gears ss ee' are shifted into" mesh with" the retell: 31,

each must turn" toward the Bed directi'cinail travel when aligned with the bed rack 31.

Starting" the Hanger rolle'r lfll in reversing hook W at 3" in Figure 3; the bed 218*is advanced to hook position- A" which is the-extent of travel of the bed '2 8" as the gears fiT-JBf'tiiln fron i the spun-driving: iiiiiioiit say-39 and? thus operative]? displace the? table 38*, durih rthe reversal" period of" mbvemenfiso that this: may be extended and controlled to avoid excess stress and The-o eratibmof theparbs'wiil-be presently 97% These hookw'IS -Were moiiiited for'osciliaihciined jhws M of the more 16 4 1" receivethe hanger rollers I00 and ml, respectively; which are disposed in the path thereof? A hanger bracket N32 and I 03 and' 'theii rollrs 'llm' a'n'd I 0 I ere proviiied for ee'olr eiid'of 'tiie bed 2 8 The Now;themthe priiicibaii rei ersiiig erssema I 1 rims m sh: enements other arm: ebsorki the takes position" A". the next one-quarter 6%) the position corresp'omi'ifig with the h ook W at B in Figure 3 while the rack: 31 ha been enmeshed with shifter gear 39 exactly sleeve-er in v'ertical' aiignmentwith the shii ter shmfiMG-a At the time: the pinion; 39 meshes with the: ha'ie'k fl,

disengagemenbof hangenroiier 101: mm reversingr hook 11: begins: to" occur; As gears ii -=48 advance another one-quarter (W39 turn: the-heel: 55"i 11: takes position C mwmgurer amdf the: new 28 has then: traversed one' fiam of itsi linear stroke which; centers it above: position 12) Fig-121M 4. During the'next (me-quarter 0 /40: tunngth'e roller mo: has become engaged in: heme 133 at c mid the rack 31 leaves: point D whenl in: the r'iekt quarter 1 0 turn: the bed 2'8 reeiei'ies its-" extreme position to the: l'e'ft op'positew the peeitionfishown. in: Figure 4, with: thehnok. T6 ait A. At this point; the" she-fit 465 is shil'bed iio fiife'seht shifter ge'ar'38i in: alignmenttwith the: 1124015231 while: the gear 3.9 moves: i inwardly: to clear: the path. of.the.;r=ack 33L The hook! 16 nowvactvanees to B? wherethe: rack, 31- meshes with the shifter gear 38fand ro11'er l ll'll. hecomesdisengagedcfirom the hook 'ifiiinthe. nextwone quarten (mwm i sults.

J! has engaged the hanger roller llll at B and the rack 31 leaves the shifter gear 38.

The shaft 46' now shifts outwardly to present shifter gear 39 in alignment with the rack 31, vand the bed circuit is complete. It will now be seen that one-half A revolution of gears '51- 18 are necessary to complete each bed reversal and another one-half /2) revolution of gears 51-48 is required to complete either one printing or inking stroke; consequently, each re-,

versal requires one-half revolution, and one half /2) revolution fora linear stroke effecting inking orprinting. Therefore, two complete turns of gears51-l8 are required to produce the complete printing circuit.

I Now, then, by increasing "distance wherein the reversal stroke takes place in the manner described herein, appreciably less strain will be imparted to the reversing gears 51-18 and, there- By rea-. 'son .of thelarge and identical pitch and di-' fore, they will be subjected to less wear.

ameters of gears 5'1, 18, and 12, more teeth will bear the reversal strain than in other bed motions. Further, this arrangement reduces the number of gear tooth playpoints to a minimum owing to the directness of their employment and their small number.

By having the shifter gears 51-18 on identical centers, perfect work balance is obtained and, therefore, smooth operation re- The straight line bearing and gear teeth play points afforded by the structural arrange ment of parts, reduces the diagonal stresses on the bed'28 and relieves its supporting tracks l3,

l4, 15,16 and aligning gibs l04'-HJ5 (Figure 7) 'from stresses and strains to the end of promoting long smooth operation.

This application is in part a continuation of my co-pending application Serial No. 560,949, now

abandoned.

While I have illustrated and described a pre-,

I claim:

1. In a device of the character described, the.

combination with a frame of a reciprocable member on said frame, means for displacing said reciprocable member intermediate its extreme limits of movement and oscillatable means for operatively displacing said reciprocable member when said-firstmentioned means are rendered :inoperative, saidoscillatable meanshaving a slot receiving a portionqof said reciprocable member,

said oscillatable means having means whereby the transverse dimension of the mouth of said:

slot is enlargeable when said portion of said reciprocable member passes therethrough.

2. In a device of the character described, the

combination with a frame of a reciprocable mem- "ber on said frame, means-for displacing said reciprocable member intermediate its extreme lim- 'its of movement, oscillatable means for operatively displacing said reciprocable member when said first mentioned means are rendered inoperative, said oscillatable means having a slot receiving a portion of said reciprocable member,

ithe transverse dimension of the mouth of said slot being enlargeable, and means operable when 'jsaid portion of, saidreciprocable member passes through .said slot for 'ienlarging the transverse dimension of the mouth ofsaid slot".

3. In a device of the characterdescribed, the combination with a frame of a reciprocable'memberon said frame, means for displacing said reciprocable. member. intermediate its extreme limits of movement and oscillatable means for operatively displacing said reciprocable memberwhen said first mentioned means are rendered inoperative, said oscillatable means comprising opposed parts spaced apart to form a slot therebetween to receive a portion of said reciprocable member, said parts being movable relatively to each other to enlarge the mouth of said slot when said portion'of said reciprocable member passes therethrough, I

4. Ina device of the character described, the

'combinationwith a frame of a reciprocable memcombination with a frame of a reciprocable member on said frame, means for displacing said reciprocable member intermediate its extreme limits of movement, oscillatable means for operatively displacing said reciprocable member when said first mentioned means are rendered inop erative, said oscillatable means comprising opposed parts spaced apart to form a slot therebetween to receive a portion of said reciprocable member, said parts being movable relatively to each other, a cam follower on one of said parts and a cam connected with-said frame and lying in the path of said follower during oscillation of said oscillatable means for moving the part carrying the cam follower relatively to the opposed part to enlarge the mouth of said slot when said portion of said reciprocable member passes therethrough.

. 6. In a device ofthe character described, the combination with a frame of a reciprocable member on said frame, means for displacing said re ciprocable member intermediate its extreme limits ofmovement, oscillatable means for operatively displacing said reciprocable member when said first mentioned means are rendered inoperative, said oscillatable means comprising opposed parts spaced apart to form a slot therebetween to receive a portion of said reciprocable member, said parts being pivotally connected to each other and being relatively movable about the axis of their pivotal connection to enlarge the mouth of said slot, and means connected with said frame for so moving said parts when said portion of said reciprocable member passes therethrough.

7. ma device of the character described, the

. combination with a frame of a reciprocable member on said frame, means for displacing said reciprocable memberintermediate its extreme limits of movement, oscillatable means for operatively displacing said reciprocable member when said first mentioned means'are rendered inoperative, said oscillatable means comprisingopposed apt-mic par-ts spaced apartzto form a slot therebetween to receive a portion-ofusaid reciprocable mem her, said parts being: pivotallyconnected to each other and beingrelatively movable about the axistof their pivotal connection to enlarge the mouth of said slot, a cam :follower on one of said parts and a cam connected with said frame and lying in the path of saidiiollower during oscillation of said oscillatable means for mom upon turning of the lever about tltie axis of its pivotal connection with said primary member to somove'said secondar member relatively to said primary :memb'er, saidlever also having a second ing the part carrying the cam follower relatively l 11);; arm, and means lcvoperating With Said co d to the-opposed part about the axis of the pivotal connection between said parts to enlarge the mouth of said slot when said portion of said reciprocable member passes therethrough.

arm during oscillation of said oscillatable means to turn said iever to bring about enlargement of thesm'outh oicsaid sl'o t when said portion of said reciprocable member passes through the mouth 8.: In a device of the character described rthe p51 oftsaid :siot.

combination with a frame of 'a reciprocablememher on said frame, means for displacing saidreciproca-ble member intermediate its extreme limits of movement, oscillatable' means for operatively: displacing said reciprocable member when i said first mentioned means arerendered inoperative, said oscillate-hie means 1 comprising a primary member and a secondarymember pivoted to said primary member, said members having t when said first mentioned means are rendered" inoperative, said osciliatable means comprising a primary (member and a secondary member pposed parts paced apart, t form a t t pivo'ted l to said primary member, said members between to receiver portion of said reciprocable member, said secondary member being pivotally movable relatively to said primary member about the axis of v the pivotal connection betweensaid having opposed parts spaced apart to form a slot atherebetw'een to receive a portion of said reciprocabl'e member, said secondary member being pivotally movable relatively to saidprimary primary and secondary members 170 enlarge the v member-about the-axis Of thepivotal (30111180131011 mouth of said slot, and means for, so movingsaid secondary member relatively to said primary member when said portion of said reciprocable member passes through the mouth of: said slotbetween said primary and secondary members to changethe width of the month of said slot, a lever pivoted to said primary member having an arm cooperating with said secondary member 9. Ina device of the character describedgthe uD II WrH II-g f the lever about the axis of its combination with a frame of areciprocablememberqon said frame, meansfor displacing said reciprocable member intermediate its extreme limits of movement, oscillatable means for-oppivotal connection with "said primary member to. so move said secondary member relatively to said primary member, said lever also having a second arm; a cam follower carried by said second eratively displacing said ,reciprocable member 40 a m, p; ea resiliently urging d Teller when said first mentioned means are rendered inoperative, said oscillatable means comprising a primary member anda secondary member pivoted to saidprimary member, said members having opposed parts spaced apart totform a said frame and lyingiinthe P O d f0}? slot therebetween to receive a portion of, said M reciprocable member, said secondary member being pivotally movable relativelylto said primary member about the axis of the pivotal conneotion lower during oscillation of said oscillatable means toturnsaidilever to bring about enlargement of themou'th of said slot when said portionof said reciprocable member passes through the month between said primary :and secondary members OF-3316451017- to change the width of :the mouth ofsaidslot, an operating device pivoted to said primary member and cooperating with said secondary member upon being 1 turned aboutthe-axis of its pivotal connection with said primarymemb'er to so movesaid secondary member- :relatively to said, primary member and means for; movingsaid operatin device to bring aboutenlargement of themouth of said slot when said portion of said, reciprooable member passes through the ,1 mouth: of said slot. H i i 1 10. In a deviceof the character described; the combination with a frame of a reciprocable lmeme her i on said frame, means :ZfOI displacing said limits of movement, roscillatable means f01'w0D-- eratively displacing :said ireciprocabl-e member when said first mentioned means are rendered inoperative, said oscillatable means "comprising pivoted tosaid primary member, said members having opposed parts spacedvaparttoiorm a slot ttherebetweendto:receive-a portion of' said reciprocable member. ssaid secondary member 12. In a device of the character describedythe combination with a frame of a rectilinearly reciprocable member on said frame, gear means for displacing said rectilinearly reciprocable member intermediate its extreme limits of moven'rent and oppositely moving synchronously timed angularly oscillatable meansior operatively displacingsaid rectilinearly reeiprocable member when said gear means, erexrendered inoperative, said angularly 60 oscillatable means each having a slot receiving a portion of saidrectilinearly reciprocable member, saidwoscillatablemeans having means whereby the-transverse dimension ofjthe month 0i" each slot is enlargeable when said p'ortionof said N reciprocableymember intermediate its extreme fi rectiiinearly reciprocable member passes therethrougm:

13; In a device of the character described, the I her on" the frame, a; shaft, means for rotating a primary member and a secondary "member 170 the shaft inone'directionofrotation, a gear on the-shaft and connected therewith soasto rotate therewith when the shaft rotates, another goal on the shaft rotatable relatively to the shaft, means separate from the shaft for rotating the second being pivotally movablerelativelyto-saidprimary:" mentioned gear in"thedirectionof rotation opposite that in which the shaft is rotatedandshifting means for rendering the first mentioned gear and the second mentioned gear alternately operative for displacing said oscillatable member.

14. In a device of the character described, the combination with a frame of an oscillatable member on the frame, a shaft, means for rotating the shaft in one direction of rotation, a gear on the shaft and connected therewith so as to rotate therewith when the shaft rotates, another gear on the shaft rotatable relatively to the shaft, means separate from the shaft for rotating the second mentioned gear in the direction of rotation opposite that in which the shaft is rotated, means holding both gears against movement relatively to the shaft in the axial direction and means for shifting the shaft in the axial direction to render the respective gears alternately operative for displacin said oscillatable member, the means for rotating the shaft being arranged so as to be operative throughout the range of axial movement of the shaft.

15. In a device of the character described, the combination with a frame of an oscillatable member on the frame, a shaft, means for rotating the shaft in one direction of rotation, a gear on the shaft and connected therewith so as to rotate therewith when the shaft rotates, another gear on the, shaft rotatable relatively to the shaft, means separate from the shaft for rotating the second mentioned gear in the direction of rotation opposite that in which the shaft is rotated, oppositely moving synchronously timed oscillatable means for operatively displacing the oscillatable member at the ends of itsstroke, means on the oscillatable member for connection with said oscillatable means when both of said gears areinoperative with respect to the oscillatable member and shifting means for rendering the first mentioned gear and the second mentioned gear alternately operative fordisplacing the oscillatable member intermediate the ends of its stroke.

16. In a device of the character described, the combination with a frame of a reciprocable member on said frame, means for displacing said reciprocable member intermediate its extreme limits of movement, oscillatable means for operatively displacing said reciprocable member when said first mentioned means are rendered" inoperative, said oscillatable means having an elongated slot having a substantially straight side, and means on said reciprocable member entering said slot and riding along said substantially straight side thereof when the oscillatable means are operative and during a portion of the time when said first mentioned means are operative.

17. In a device of the character described, the combination with a frame of a reciprocable member on said frame, parallel shafts journalled' for support on said frame, intermeshing'gear's for I driving said shafts in opposite directions'at the same speed, oscillatable means operatively connected to said shafts, a shifter shaft journalled for support on said frame, a double gear on said travel, ashifter rotating gear in operative con- 1 nection with said first named intermeshing gears to control the meshing position of said A double gear, means onsaid reciprocable member for connection with, said oscillatable means for" reversing said reciprocable *member'when said double gear is inoperative for displacing said re-f ciprocable membensaid oscillatable means including jaw means: forming an elongated slot having a substantially straight side, and roller means carried by said reciprocable member inthe path of said slotso as to ride along said substantially straight side thereof and during a portion of the time when said double "gear is operative.

' 18. In a device of the character described, the" combination'with a frame of a reciprocable mem ber-on said frame, parallel shafts journalled'for support on said frame, intermeshing gearsfordriving said shafts inopposite directions at the same-speed, oscillatable means-operatively condouble gear, means on said reciprocable member for connection with-"said "oscillatable means for reversing said reciprocable member when saidj double gear is inoperative for displacing said reciprocable membensaid oscillatable means 'inclu'ding'jaw means forming elongated slots each= having'a substantially straight side, roller means carried by said reciprocable member'in the' paths"- of said"slots"so"as to ride along said substantially straight sides thereof and during a portion of the time when said double gear is operative,

crank arms on said parallel shafts and adjustable I pitmans interposed between said crank arms and oscillatable means. V

19. In a device of the character described, the

combination with a frame of a reciprocable member on said frame, gear means for displacing said reciprocable member intermediate its extreme limits of movement, oppositely moving synchrongearme'ans are rendered inoperative, said oscillatable means including jaw 'means forming elongated slots each having a substantially -straight side, and roller means carried by said reciprocable member in the paths of said slots so as to ride along said substantially straight sides thereof and during a portion of the time when said gear means are operative.

her on said frame, gear means for displacing said reciprocable member intermediate its extreme" limits of movement, oppositely moving synchronously' timed oscillatable means for 'operatively displacing said reciprocable member when said gear meanS are rendered inoperative, said oscillatable meansin'cluding jaw means forming-f elongated slots each having a substantially 'straight side; roller means carried by said reciprocable member in the paths of said'slots so as to ride along saidsubstantiall'y straight sides thereof'and during a portion of the time when said gear means are operative, crank arms operatively drivenb'ysaid gear means and adjustable pitmans interposed between said crank arms 1 and oscillatable means.

21.'In a device: of the character described, the

combination with a frame of a reciprocable momtber on said fram'agearmeans for displacing'said 201' In a device ofthe character described, the combination witha frame of a reciprocable memreciprocable member intermediate its extreme limits of movement, oppositely moving synchronously timed oscillatable means for operatively displacing said reciprocable member when said gear means are rendered inoperative, said oscillatable means including jaw means forming elongated slots, each having a substantially straight side, roller means carried by said reciprocable member in the paths of said slots so as to ride along said substantially straight sides thereof and during a portion of the time when said gear means are operative, crank arms operatively driven by said gear means and adjustable pitmans interposed between said crank arms and oscillatable means.

22. In a device of the character described, the combination with a frame of a reciprocable member on said frame, gear means for displacing said reciprocable member intermediate its extreme limits of movement, oppositely moving synchronously timed oscillatable means for operatively displacing said reciprocable member when said gear means are rendered inoperative, said oscillatable means including jaw means forming elongated slots each having a substantially straight side, roller means carried by said reciprocable member in the paths of said slots so as to ride along said substantially straight sides thereof and during a portion of the time when said gear means are operative, crank arms operatively driven by said gear means, adjustable pitmans interposed between said crank arms and oscillatable means and shifting means for rendering said gear means operative for alternately displacing said reciprocable member in opposite direction.

23. In a device of the character described, the combination with a frame of a reciprocable member on said frame, means for displacing said reciprocable member intermediate its extreme limits of movement, angularly oscillatable means for operatively displacing said reciprocable member when said first mentioned means are rendered inoperative, said angularly oscillatable means having an elongated slot having a substantially straight side and means on said reciprocable member entering said slot when the angularly oscillatable means are operative so as to ride along said substantially straight side of said slot and during a portion of the time when said first mentioned means are operative.

24. In a device of the character described, the combination with a frame of an oscillatable member on the frame, a shaft, means for rotating the shaft in one direction of rotation, a gear on the shaft and connected therewith so as to rotate therewith when the shaft rotates, another gear on the shaft rotatable relatively to the shaft,

means for rotating the second mentioned gear in the direction of rotation opposite that in which the shaft is rotated and shifting means for rendering the first mentioned gear and the second mentioned gear alternately operative for displace ing said oscillatable member.

25. In a device of the character described, the combination with a frame of an oscillatable member on the frame, a shaft, means for rotating the shaft in one direction of rotation, a gear on the shaft and connected therewith so as to rotate therewith when the shaft rotates, another gear on the shaft rotatable relatively to the shaft, means for rotating the second mentioned gear in the direction of rotation opposite that in which the shaft is rotated, means holding both gears against movement relatively to the shaft in the axial direction and means for shifting the shaft in the axial direction to render the respective gears alternately operative for displacing said oscillatable member, the means for rotating the shaft being arranged so as to be operative throughout the range of axial movement of the shaft. 1

26. In a device of the character described, the combination with a frame of an oscillatable member on the frame, a shaft, means for rotating the shaft in one direction of rotation, a gear on the shaft and connected therewith so as to rotate therewith when the shaft rotates, another gear on the shaft rotatable relatively to the shaft, means for rotating the second mentioned gear in the direction of rotation opposite that in which the shaft is rotated, oppositely moving synchronously timed oscillatable means for operatively displacing the oscillatable member at the ends of its stroke, means on the oscillatable member for connection with said oscillatable means when both of said gears are inoperative with respect to the oscillatable member and shifting means for rendering the first mentioned gear and the second mentioned gear alternately operative for displacing the oscillatable member intermediate the ends of its stroke.

ARTHUR J. J ENNER.

REFERENCES CITED The following references are of record in th file of this patent:

UNITED STATES PATENTS Number Name Date 56,304 Whitely July 10, 1866 477,200 Crowell June 21, 1892 533,117 Crowell Jan. 29, 1895 1,199,398 Loftus Sept. 26, 1916 2,324,001 Kelly July 13, 1943 Certificate of Correction Patent No. 2,517,210 August 1, 1950 ARTHUR J. JENNER It is hereby certified thaterror appears in the printed specification of the above numbered patent requiring correction as follows:

Column 1, line 48, for stright read straight; column 3, line 34, for the Words period of read period or; line 56, for sleeve and read sleeve end; column 10, line 40, before stop insert a;

and that the said Letters Patent should be read as corrected above, so that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 28th day of November, A. D. 1950.

THOMAS F. MURPHY,

Assistant Gammz'ssz'oner of Patents.

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