US669869A - Paper-cutter. - Google Patents

Description

Patent ed Mar. l2, l90l.

6. K. WHITE. PAPER CUTTER.

(Application filed Oct. 7,}899.)

4 Sheets-Sheet I.

(No Model.)

[NJ/awn MZW m: ponms Perms co. PHOTQ-LIYHQ. WASHINGTON, uc,

' Patented Mar. l2, I90I.

8. K. WHITE.

PAPER CUTTER.

(Application filed Oct. 7, 1899.)

4 Sheets-Sheet 2.

(No Model.)

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No. 669,869. Patented Mar. [2, 19m.

S. K. WHITE.

PARERCUTTER. (Appliceyion fllsd 066 7, 1699.)

4 Sheets-$heet 3.

' (No Model.)

WITNESSES,

Tn: NORRIS Fermi col. mmmumcd WASHINGTON. a. c.

No. 669,869 Patented Mar. l2, mm,

s. K. WHITE.

PAPER CUTTER.

' (Application filed Oct. 7, 1.899.)

(No Model). 4 Shasta-Sheet 4.

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llNTTan STATES PATENT @rricn.

SAMUEL K. WHITE, OF MYSTIC, CONNECTICUT, ASSIGNOR TO THE STANDAR MACHINERY COMPANY, OF SAME PLACE.

PAPER-CUTTER.

fiPECIFICCATIQN formingpart of Letters Patent No. 669,869, dated March 12, 1901. Application filed October '7, 1899. Serial No. 732.850. lllo model.)

To CLZZ who/7t it may concern: In the drawings, Figure 1 is a rear eleva- Be it known that I, SAMUEL K. WHITE, of tion of a cutter embodying all the features of Mystic, county of New London, State of Conthe presentinvention in their preferred forms. necticut, have invented certain new and use-. Fig. 2 is a horizontal sectional view takenbe- 5 ful Improvements in Paper-Cutters; and I do low the table. Fig. 3 is a side elevation. Figs. hereby declare the following specification, 4 and 5 are details of a part of the starting taken in connection with the accompanying and stopping mechanism. Fig. 6 is a detail drawings, forming a part of the same, to be a of the clutch for operating the pusher. Fig. full, clear, and exact description thereof. 7 is a detail of the hand-recesses in the table. 1o Theinvention relates to that class of paper- Fig. 8 is a detail of the front end of the slide cutters in which the sheets to be out are held to which the back gage is connected. Fig. 9 upon a table by a clamping-bar and are acted is a sectional detail through the end of the upon by a reciprocating cutter-blade. guide 97 at the right of 3. Fig. 10 is a Certain features of the invention relate to detail showing the arms lOl. Fig. 11 is a de- I5 the mechanism for regulating the pressure of tail of the means for positively starting the the clamp upon the pile of sheets according rod 29, and Fig. 12 is adetailof thedriver for to the resistance offered by the sheets to the operating the clamp-bar. passage of the cutter-blade, the construction Referring to the drawings in detail, the being such that the pressure of the clamp will knife-bar 1 is guided in vertical slots 2, formed 20 increase as the resistance to the cutter inin the side frames 3, and is hung upon links creases. In a previous application I have 4, as is common in this class of cutters. The shown a mechanism for accomplishing this knife-bar is connected to its operating-lever result by operating the clamp through a mov- 5 by a link 6 in the usual manner, and said able member which is frictionally connected lever is provided with a weight 7, operating 25 with the clamp and regulating the friction ac-' to rock said lever in a direction to move the cording to the resistance to the cutter, and in cutter into its raised position and to hold said said application I have claimed, broadly, this cutter in this position until the mechanism manner of operating the clamp. In the presfor drawing the cutter down is thrown into ent construction the same broad invention action. lheclamping-barSissuitablyguided 8o 0 is employed, but a more simple and efficient in the side frames 3 and is connected at each mechanism is provided. end with a rack 9 by means of a bar 9, which Further features of invention relate to the is bolted to the rack and to the end of the means for advancing the pile of cut-sheets clampingbar. The clamping-bar is forced under the cutter, so that they may be readily down upon the pile of sheets supported on the 5 and conveniently removed, and consist gentahlelO by mechanism, to be described, which erally in providing mechanism for automaticoperates said bar through said racks, and said ally operating the means which thus moves bar is raised by means of a weighted lever 11, the sheets, which mechanismmay be thrown which is connected with one of said racks into operation at the will of the operator and through a link 12. 40 which when thrown into action automatically The various mechanisms of the machine advances the pile of sheets under the knife are driven from a driving-shaft l3. suitably without altering the setting of the back gage. mounted in the frame and having a balance- Further features of invention relate to the wheel 14 secured to one end thereof. A pulmechanism for starting and stopping the maley 15 is secured to the shaft 13 by being bolt- 5 5 chine and also to the means for depressing ed to the wheel 14, and a stud 16 is secured the clamping-bar at the will of the operator in said pulley, upon which is mounted the without operating the cutting-blade. loose pulley 17. The mechanism for operat- Other features of invention relate to coming the k nife-lever is driven from the shaft binations and constructi ms which will be re- 13 through a friction-clutch 18, one member 50 ferred to hereinafter, and particularly pointof which is secured to said shaft and the other ed out in the claims. member of which is secured to a sleeve 19,

through which said shaft passes. The sleeve 19 is suitably mounted in the side frame 3 and carries a pinion 20 at its outer end. The pinion 20 engages and drives a gear2l, connected with the knife-operating shaft 22 by means to be described. The cutter-operating lever 5 is operated from the shaft 22 by means of a chain 23, which passes over a sprocket-wheel 24, secured to said shaft, and is connected with the end of said lever by means of a hook 25 on said lever which engages one of the links of said chain.

The clutch 18 is thrown into operation by power-driven means, which may be thrown into action at the will of the operator, and the clutch may also be thrown out of action at the will of the operator to arrest the descent of the knife and return it to its raised position. If the descent of the knife is not stopped by the operator, then the clutch 18 is automatically released and the knife returned after the cut is finished. Thus the knife-bar may be accurately controlled by the operator with the expenditure of very little manual power. Anysuitable mechanism may be employed for thus controlling the knife-opcrating mechanism, and in the machine shown a preferred form of mechanism is shown for accomplishing this purpose,which in itself embodies several features of invention, as will more definitely appear from the claims. As shown, the operatingarm 26 of the main clutch 18 is arranged to be engaged by a cone 27, mounted on the shaft 13 and engaged by a yoke 28, secured to a reciprocating operating bar or rod 29. The'rod 29 is normally held in its retracted position with the cone 27 out of engagement with arm 26 by a spring 30, interposed between frame 3 and a collar 31 on said rod, Fig. 2. The rod is advanced to engage the clutch 18 by a novel mechanism which embodies certain features of invention. This mechanism consists of a rotating member, a second member arrangedto be normally rotated by the engagement between said members and a cam-surface on one of said members arranged to cause a longitudinal movement of said second member when said member is held from rotation. In the construction shown the rotating member consists of a collar or drum 32, secured to a shaft 33, which is continuously driven from the driving-shaft 13 by means of a gear 34, secured to said shaft 13 and engaging a gear 35, secured to shaft 33. The drum 32 is provided with a series of inclines or cams 36, which engage a series of corresponding inclines 37 on a second drum 38, loosely mounted on the shaft 33 and yieldingly held against the drum 32 by a sleeve 39, which surrounds shaft 33, and is formed on the end of an arm 40, projecting laterally from a sleeve 41, mounted on rod 29. The sleeve 41 is loosely mounted on rod 29 and is held in place by a collar 42, pinned to said rod. The drums 32 and 38 normally rotate in unison by reason of the engagement of the cam-surfaces 36 and tain distance.

37. When the rod 29 is to be advanced to engage clutch 18, the rotation of drum 38 is arrested and said drum is then moved longitudinally by the action of the cam-surfaces, and through the connections described this longitudinal movement is transmitted to rod 29. When the rod 29 is advanced, it is held in its advanced position by means of a catch in the form of a locking-lever 43, which engages a collar 44, secured to rod 29, and holds said rod against the tension of spring 30. The lever 43 is forced in a direction to move it into the path of the collar 44 by means of aspring 45, connected at one end with an arm 46, extending down from said lever, and at the other end to an arm 47, secured to rod 29. When the rod is in its retracted position, the lever 43 is held down against the tension of the spring by the collar 44, as shown in Fig. 1.

The lever 43 may be rocked to release rod 29, and thus throw the knife-operating mechanism out of operation either by the operator or automatically when the cut is finished. The mechanism shown for tripping said lever 43 automatically consists of an arm or lever 49, Fig. 4, secured to the shaft 50, to which said lever is secured, and having its end arranged in the path of the knife-lever, so that when said lever has been raised to a certain position it will strike said arm and rock-shaft and lever 43. The mechanism shown for tripping said lever 43 at the will of the operator will be described in connection with the mechanism for arresting the rotation of drum 38.

The drum 38 is held from rotation at the desired time by means of a stop 51, formed on theend of a lever 52 and arranged to be moved into thepath of one or more shoulders 53 on drum 38. The shoulders 53 are formed by ribs projecting from the periphery of the drum 38, as shown in Figs. 4 and 5. The stop-lever 52 is connected by means of a link 54 with an arm 54, secured to a rock-shaft 55 at the front of the machine. A hand-lever 55 is secured to the shaft 55 within convenient reach of the operator and is normally held in position to hold lever 52 away from drum 38 by a spring-pressed pin 56, the V- shaped end of which rides over the end of an arm 57, projecting from the shaft 55. The inclines 36 and 37 are preferably of such shape that the rod 29 will be advanced far enough to bring the collar beyond the end of lever 43 before said inclines have passed each other, and a cam is preferably carried by the drum 38 for disengaging the stop 51 before said inclines have passed each other, so that said inclines are always in engagement. Such a cam is shown at 58, arranged to force the stop 51 back after the drum 38 has moved a cer- In the construction shown the lever 55 is also employed to trip the lockinglever 43 at the will of the operator in the following manner: An'arm 59 is connected with the lever 52, and the end of said arm is connected by means of a link or rod with the rear end of lever 43, the arrangement being such that when the lever 55 is moved in the direction of the arrow, Figs. 3and 4, the arm 59 is lifted to trip the lever 43 and throw the knife-operating mechanism out of operation. When the lever 55 is moved in the opposite direction to throw the knife-operating mechanism into action, the rod 60 slides freely through the end of lever 43. Means are preferably provided for positively starting the rod 29 back when the lever 43 is tripped, so that any tendency for the bar to fail to start will be overcome and the action of the spring 30 be made more sure and positive. A further advantage of such a means is that it enables the use of a lighter spring 30 and makes the operation of the parts more sensitive. This means preferably consists of a link 61, pivoted to the end of arm 47 and provided with a slot 62, in which rides a pin (53 on the arm 46 referred to. The length of slot 62 is such that when lever 43 is rocked to release rod 29 the pin 63 will engage the end of said slot and draw the rod 29 back a short distance. The engagement of the pin 63 with the end of the slot 62 does not occur until the lever 43 has moved out of engagement with the collar 44.

The movement of the rod 29 also throws into and out of action the mechanism for operating the clamping-bar in the following manner: The clamping bar is operated through a shaft 64, which carries pinions 65, engaging racks 9. A clutch 66 is mounted on the shaft 64, one member of said clutch being fast to said shaft and the other member being formed in a driving-gear 67. The operatingarm 68, Fig. 1, of said clutch is operated by a cone 69 on the shaft 64, said,

cone being connected with the rod 29 by a yoke 70. When the rod 29 is advanced, the clutch 66 is engaged and the clamping-bar forced down upon the paper, and when said rod is retracted said clutch is disengaged and the clampingbar is raised by the weighted lever 11. The mechanism for operating the clamping-bar is driven by a friction driver or clutch, and the friction of said driver is increased as the resistance to the knife in- :reases, so that the paper will be clamped with a pressure proportional to the resistance to the knife. In the construction shown the friction-driver is mounted on the knife-operating shaft and consists of two friction-cones 71 and 72, keyed to the shaft 22, and a sleeve 73, provided with conical recesses in its ends for engaging said cones. The driver is connected with the gear 67 by means of a gear 74, formed on sleeve 73, and an intermediate gear 75, which engages gear 67 and gear 74. The cone 71 is pinned to the shaft 22; but the cone 72 may move longitudinally on said shaft to vary the friction between the parts of the driver. The hub of cone 72 forms one part of the coupling for connecting the gear The other part of said coupling consists of a sleeve or drum 76, keyed to the sleeve 77, which passes through the frame 3 and forms the hub of gear 21. The parts of the coupling are connected together by means of inclines 78, which form clutch-faces for causing the one part to drive the other, and also form cams tending to force the parts of the coupling away from each other, which force will increase as the resistance to the rotation of the driven part of the coupling increases. Since the knife is forced through the paper by the rotation of shaft 22, which is keyed to the cone 72, and said cone is driven by the engagement of the cam-surfaces 78, said cone will he forced longitudinally with a pressure increasing as the resistance to the knife increases. The pressure between the cones 71 and 72 and the sleeve 73 will therefore increase with the resistance to the knife, causing increased friction between the parts of the driver which operates the clamp, and therefore forcing the clamp more firmly upon the paper. There should be sufficient friction between parts of the friction-driver to bring the clamp down upon the paper in ad Vance of the knife, and this friction may be regulated to increase or diminish the force with which this initial clamping is done by adjusting the normal pressure between the parts of the friction driver. The means shown for effecting this adjustment consists of a nut 79, which engages a screw-thread on the end of shaft 22. This nut is provided with an arm 80, which carries a pin 81, arranged to engage any one of a series of holes formed in a plate 82, keyed to the shaft 22. By turning said nut the shaft 22 may be moved longitudinally to draw the cones 71 and 72 and sleeve 73 more or less firmly together.

It is sometimes desirable to bring the clamp down upon the paper without throwing the knife into operation, and with the present invention this is effected by power-driven mechanism which is thrown into and out of operation at the will of the operator. The preferred form of such a mechanism consists of a frictional driven gearing for connecting the shaft 64 with a constantly-running shaft, such as shaft As shown, the shaft 33 carries a friction-pulley 83, which is arranged to be engaged by a friction-pulley 84, carried on a lever 85, which is pivotally mounted on the shaft 64. A pinion 86 is connected with pul ley 84 and engages a gear 87, secured to the shaft 64. The lever 85 may be rocked to carry the pulley 84 into engagement with pulley 83 by connecting the end of said lever with an arm 88, secured to a rock-shaft 89. The arm 88 is weighted to hold the pulley 84 normally away from the pulley 83. The rock-shaft 87 is provided with an arm 90, which is connected by means of a link 91 with one arm of a rock-lever 92, the other arm of which is connected by a rod 93 with a treadle 94, located 21, heretofore described, with the shaft 22. in a convenient position at the front of the lOO machine. By pressing down the treadle the operator causes the clamp to be brought onto the paper at will.

The paper to be cut is supported upon the table and the size of the sheets out is regulated by a back gage 95. After the sheets are out they may be pushed forward under the knife, so that the operator is not obliged to put his hands under the knife in removing the paper. With the present invention the means for pushing the cut sheets under the cutter is. operated by a power-driven mechanism which is thrown into operation at the will of the operator. In the machine illustrated the back gage is utilized to push forward the out sheets, and is then returned to its former position, so that the setting or adjustment of said gage relative to the knife is not altered. It will be understood, however, that means other than the back gage may be used for this purpose without departing from the invention. In order that the gage may be thus used, it is connected with a slide 96, mounted in guides 97 under the table. This slide normally stands in a definite position, with its end abutted against a stop 98 on the table. Said slide may be held against said stop bya spring 99. The back gage is set for the size of sheets to be out by adjusting said gage relative to said slide, and the setting of said gage will not be affected, therefore, by the operation of pushing the out sheets forward, since said slide is always returned to the same position. The gage is guided by a slot 100 in the table and is provided with depending arms 101, to which the ends of a cable 102 are secured. The cable passes around a pulley 103 at the rear of slide 96 and a drum 104 at the front end of said slide. A handwheel 105 is connected with drum 104, by turning which the back gage may be adjusted. A graduated tape'106 also has its ends secured to the arms 101 and passes over pulleys at the ends of the slide 96. The graduj ations on the tape are so arranged that the adjustment of the back gage may be read at the front of the machine. The drum 104 may be clamped to hold the back gage in its adjusted position by a clamping-handle 107.

In the machine shown the power for operating the slide 96 is taken from the shaft 33 by a mechanism which in itself embodies certain features of invention. This mechanism embodies a continuously-rotating clutch member and a second clutch member which carries a cam for positively throwing the members into engagement and a second cam for throwing the members out of engagement after the clutch has made a single revolution. The contin uously-rotating clutch me mher 108 is secured to the end of shaft 33, and the second clutch member 109 is keyed to slide on the end of a short shaft 110, mounted in a bracket 111 and arranged in line with the shaft 33. The shaft has a crank-arm 112 secured to its otherend,which is connected by means of a rod 113 with the slide 96.

The member 109 carries a cam 114, Fig. 6, arranged to be moved into position to engage an abutment in the form of a pin 115 when said member is moved toward the member 108. A slight movement of the member 109 brings the teeth of the clutch into engagement, so that member 109 will rotate with member 108, and the rotation of member 109 causes the cam 114 to ride against pin 115, forcing the teeth of the clutch members positively into engagement. When the member 109 has made a single revolution, a cam 116 on said member rides against a second abutment 117 and forces member 109 back and positively disengages the clutch members. It is preferred to connect cams 114 and 116 by a rib 118, which runs between the pins 115 and 117 and positively holds the clutch members in engagement during the rotation of member 109. During the single rotation of shaft 110 thuseffected the crank-arm 112 acts to advance the slide 96 andreturn it to its normal position. The clutch member 109 is given its initial longitudinal movement by a lever 119, one end of which rides in an annular groove 120, formed in the hub of member 109. The other end of said lever is connected by means of a link 121 with an operating-lever 122, located at the front of the machine. Thus by rocking the lever 122 the operator may cause the pile of cut sheets to be quickly advanced under the knife, where they may be readily grasped by the hands and removed. The table 10 may be and preferably is provided with recesses 123 in front of the knife, over which the edge of the pile lies when advanced, so that the hands may be readily inserted under the pile in removing the same.

What I claim as my invention, and desire to secure by Letters Patent, is

1. In a paper-cutter, the combination with the knife-bar, of mechanism for operating the same, a main shaft, devices operated therefrom for throwing said operating mechanism into operation, and means for throwing said devices into operation at will.

2. In a paper-cutter, the combination with the knife-bar, of mechanism for operating the same embodying a clutch, a main shaft, mechanism operated therefrom for engaging said clutch, and means for throwing said latter mechanism into operation at will.

3. In a paper-cutter, the combination with the knife-bar, of mechanism for operating the same, a main shaft, devices operated therefrom for throwing said operating mechanism into operation, means for throwing said devices into operation at will, and mechanism for throwing said operating mechanism out of operation automatically.

4. In a paper-cutter, the combination with the knife-bar, of mechanism for operating the same, a main shaft, devices operated therefrom for throwing said operating mechanism into operation, means for throwing said devices into operation at will, mechanism for throwing said operating mechanism out of.

operation an tom atical ly,and means for th I( I wing said operating mechanism out of operation at will.

5. In a paper-cutter, the combination with the knife-bar, of a clutch through which said bar is operated, a main shaft, mechanism for engaging said clutch, means operated from said shaft for throwing said mechanism into operation at will, a latch for holding said clutch in engagement, and means for tripping said latch at will to release said clutch.

6. In a paper-cutter, the combination with the knife-bar, of a clutch through which said bar is operated, a main shaft, mechanism for engaging said clutch, means driven from said shaft for throwing said mechanism int-o operation at will, a latch for holding said clutch in engagement, and means for automatically tripping said latch to release said clutch.

7. In a paper-cutter, the combination with the knife-bar, of a clutch through which said bar is operated, a rod for operating said clutch, a main shaft, mechanism operated from said shaft for advancing said rod, a latch for holding said rod advanced, means for throwing said mechanism into operation at will, and means for tripping said latch to release said clutch.

8. In a paper-cutter, the combination with the knife bar, and its operatinglever, of mechanism for operating said lever, a main shaft, mechanism operated from said shaft for throwing said operating means into action, a latch for holding said mechanism in action, and means operated by the operating-lever for tripping said latch.

9. In a paper-cutter, the combination with the knife-bar, and operating-lever, of mechanism for operating said lever, a latch for holding said mechanism in action, a rockshaft carrying said latch, an arm connected to said shaft and arranged in the path of said lever.

10. In a paper-cutter, the combination with the main clutch, of mechanism for operating the same comprising a rotating member, a second member driven by engagement with said rotating member, one or more cam-surfaces on one of said members for causing a longitudinal movement of said second memher when said member is held from rotation,

and means for preventing the rotation of said second member at will.

11. In apaper-cutter, the combination with the main clutch, of mechanism for operating the same comprising a rotary member, a second member driven by engagement With said rotating member, one or more cam-surfaces on one of said members for causing a longitudinal movement of said second member when said member is held from rotation, one or more shoulders on said second member, and a movable stop for engaging the same.

12. In a paper-cutter, the combination with the main clutch, of mechanism for operating the same comprising a rotary member, a second member driven by engagement with said rotary member, one or more cam-surfaces on one of said members for causing a longitudinal movement of said second member when said member is held from rotation, one or more shoulders on said second member, a stop for engaging the same, and means for operating said stop at will.

13. The combination of a rotary member, a second member driven by engagement there with, one or more cam-surfaces on one of said members for causing a longitudinal movement of said second member when said member is held from rotation, and means for preventing the rotation of said second member.

14. The combination of a rotary member, a second member driven by engagement therewith, one or more cam-surfaces on oneof said members for causing a longitudinal movement of said second member when said memberis held from rotation,one or more shoulders on said second member, and a movable stop for engaging the same.

15. The combination of a rotary member, a second member driven by engagement therewith, one or more cam-surfaces on one of said members for causing a longitudinal movement of said second member when said memberis held from rotation,one or more shoulders on said second member, a movable stop for engaging the same, and one or more cams on said second member fordisengaging said stop.

16. In a paper-cutter, the combination with a clutch-operating rod, of a spring for retracting thesame,arotatingdrum32,asecond drum 38, engaging inclines 36 and 37 on said drums, connections between drum 38 and said opering-rod, shoulders 53 on drum 38, a movable stop for engaging the same, a locking-lever 43 for holding said operating'rod advanced, and means for tripping said lever.

17. In a paper-cutter, the combination with a clutch-operating rod, a spring for retracting the same, mechanism for advancing said rod, a latch for holding said rod advanced, means for tripping said latch, and means positively starting said rod rearward.

18. In a paper-cutter, the combination with a clutch-operating rod 29, of mechanism for advancing the same, a spring for retracting said rod, a locking-lever 43 for holding said rod advanced, a link 61 connected with said rod, a slot 62 in said link, an arm 46 connected with said lever 43, a pin on said arm riding in said slot and arranged to en gage the end of said slot and start said rod back when said lever 43 is tripped, and means for tripping said lever.

19. In a paper-cutter, the combination with the knife-barand operating-lever, of mechanism for operating said lever, a latch for bolding said mechanism in action, a rock-shaft carrying said latch, an arm carried by said rock-shaft and arranged in the path of said lever, and connections between said latch and a hand-lever.

20. In a paper-cutter, the combination with the knife-bar, of mechanism for operating the 7 same, mechanism for throwing said operating mechanism into operation embodying two rotary members connected by engaginginclines, a stop-lever 52 for holding one member from rotation, a lever 4:3'for holding said operating mechanism in action, a lever 55 and connections between said lever and levers 52 and 43.

21. In a paper-cutter, the combination with the knife-bar, of mechanism for operating the same embodying a two part coupling or clutch, the parts of which are provided with one or more engaging inclines, a clampingbar, operating mechanism therefor embodying a friction-driver arranged to receive the direct thrust of said coupling.

22. In a paper-cutter, the combination with the knifebar, of a two-part coupling or clutch, connections between one part of said coupling and said knife-bar, means for driving the other partof said coupling, one or more cam-surfaces forming the connections between the parts of said coupling, a clamp ing-bar, a friction-driver for operating said clamping-bar arranged to hold the parts of said coupling in engagement.

23. In a paper-cutter, the combination with a knife-operating shaft, a clamping; bar, a driver therefor consisting of one or more friction-cones connected with said shaft, a sleeve on said shaft having a corresponding cone or cones, gearing between said sleeve and clamping-bar, a two-part coupling or clutch, means for rotating one of said parts, means for connecting the other part to said shaft, one or more cam-surfaces connecting the parts of said coupling, and a connection between said driver and coupling whereby the parts of said driver are forced together by the longitudinal movement of one of the parts of said coupling.

24:. The combination with a shaft, ofa friction-cone 71 secured thereto, a sleeve 73 having a corresponding conical surface, a driving-gear carried by said sleeve, a part keyed to slide on said shaft and engaging said sleeve, a rotary part held from longitudinal movement, and cam-surfaces as 78 connecting the rotary and sliding parts.

25. The combination with a shaft, of a friction-cone 71 secured thereto, a cone 72 keyed to slide thereon, a sleeve 73 between said cones and provided with conical engaging surfaces, a driving-gear connected with said sleeve, a rotary part 76, and cam-surfaces 78 connecting part 76 and cone 72.

26. In a paper-cutter, the combination with the knife-bar and clamping-bar, of a frictiondriver for operating the clamping-bar, means for regulating the friction by the resistance to the knife, and a clutch for connecting said driver with and disconnecting it from said clamp.

27. In a paper-cutter, the combination with the knife-bar and clamping-bar, of a frictiondriver for operating the clamping-bar, means for regulating the friction by the resistance to the knife, and means for adjusting the initial friction of said driver.

28. In a paper-cutter, the combination with the knife-bar, and clainping-bar, of mechanism l'or operating the cutter-bar embodying a two-part coupling connection between one of said parts and the cutter-bar, cam-surfaces connecting the parts of said coupling, a-friction-driver for operating the clamping bar arranged to resist the separation of the parts of said coupling, and means for adjusting the friction of said driver.

29. In a paper-cutter, the combination with a shaft 22 foroperating the knife-bar, frictioncone 71 secured thereto, sleeve 73 having a conical surface engaging cone 71, a clampingbar gearing between sleeve 73 and said bar, a part keyed to slide on shaft 22 and engaging said sleeve, a rotary part, cam-surfaces connecting said sliding and rotary parts, and a nut on the end of shaft 22 for drawing said cones and sleeve together.

30. The combination with shaft 22, cone 71, sleeve 73, cone 72 having cam-surfaces 78, drum 76 having cam-surfaces 78, sleeve 77, gear 21 connected thereto, arm 82, nut 79, armSO, and pin 81.

31. In a paper-cutter, the combination with ash-aft 22 for operating the knife-bar, frictioncone 71 secured thereto, sleeve 73 having a conical surface engaging cone 71, a clamping bar, gearing between sleeve 73 and said bar, a part keyed to slide on shaft 22 and engaging said sleeve, a rotary part as 76 and cam-surfaces as 78 connecting said sliding part and part 76.

32. In a paper-cutter, the combination with a shaft 22 for operating the knife-bar, frictioncone 71 secured to said shaft, friction-cone 72 keyed to slide on said shaft, a sleeve 73 between said cones and provided with conical engaging surfaces, a clamping-bar, gearing between said bar and sleeve, a rotary part as 76, and cam-surfaces as 78 connecting part 76 and cone 72.

33. In a paper-cutter, the combination with the knife-bar, and clamping-bar, of mechanism for operating said knife-bar embodying a clutch, a friction-driver operating said clamping-bar, gearing connecting said driver and clamping-bar embodying a clutch, means for simultaneously operating said clutches, and means for regulating the friction of said driver by the resistance to the knife.

34:. In a paper-cutter, the combination with the knife-bar and clampingbar, of mechanism for simultaneously operating the knifebar and clamping-bar, a main shaft, mechanism operated therefrom for bringing the clamping-bar down upon the paper independent of the operation of the knife-bar, and means for throwing said latter mechanism into action at will.

35. In a paper-cutter, the combination with the knife-bar, and clamping-bar, of mechanism for simultaneously operating the knifebar and clamping-bar, frictional gearing for operating said clamping-bar independently of said knife-bar, and means for throwing said gearing into operation at will.

36. In a paper-cutter, the combination with the clamping-bar, of an operating-shaft connected therewith, a lever pivotally mounted 'thereon, a friction-pulley mounted on said lever and geared to said shaft, a constantlyrunning friction-pulley, and means for moving said lever at will to engage said pulleys.

37. In a paper-cutter, the combination with the knife-bar, of a back gage, means for advancing the pile of cut sheets under the knifebar without altering the setting of the back gage, a power-operated driver for said means, and means for throwing said driver into operation at the will of the operator.

38. In a paper-cutter, the combination With the knife-bar, of a pusher for advancing the pile of cut sheets under the knife-bar, a main shaft, mechanism operated therefrom for advancing and returning said pusher,and means for throwing said mechanism into action at will.

39. In a paper-cutter, the combination with I the knife-bar, of a pusher for advancing the pile of cut sheets under the knife, a crank connected with said pusher, a driver for operating said crank, and means for throwing said driver into action at will.

40. In a paper-cutter, the combination with the knife-bar, of a pusher for advancing the pile of cut sheets under the knife, mechanism for operating said pusher comprising a rotating clutch member, a second clutch member, means for disengaging said members after a single revolution of said second member, and means for engaging said members at will.

41. In a paper-cutter, the combination with the knife-bar, of a pusher for advancing the pile of cut sheets under the knife, mechanism for operating said pusher comprising a rotary clutch member, a second clutch member, a cam on said second member for disengaging said mem her after a single revolution,

an abutment in the path of said cam, and means for engaging said members at will.

42. In a paper-cutter, the combination with the knife-bar, of a pusher for advancing the pile of cut sheets under the knife mechanism i'or operating said pusher comprising a rotating clutch member,a second clutch member, a cam on said second member for moving said member toward said rotary member, a cam on said second member for disengaging said members, abutments in the paths of said cams, and means for moving said second member toward said rotary member at will.

43. The combination of the rotary member 108, the longitudinally-movable member 109, cams 114 and 116 carried by member 109, abutments 115 and 117 and means for moving member 109 toward member 108.

44. The combination of the rotary member 108, the longitudinally-movable member 109, cams 114 and 116 carried by member 109, a web 118 connecting said cams, abutments 115 .and 117, and means for moving member 109 toward member 108.

45. In a paper-cutter, the combination with a slide, of a back gage adjustably connected with said slide, mechanism for automatically advancing said slide and returning the same i therewith, a crank connected with said slide,

mechanism thrown into operation at will for giving said crank a single revolution.

7 SAMUEL K. WHITE.

Witnesses: 7

JOHN HENSHAW, IRA L. FISH.

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