USRE16204E

USRE16204E - Polishing machine

Info

Publication number: USRE16204E
Authority: US
Publication date: 1925-11-10

Description

F. RAMSTETTER ET AL POLISHING MACHINE N v. 10, 1925- Re. 16.204

Original Filed Dec. 13; 1918 8 Sheets-Sheet 1 @Moump Nov.10,-1925- 11516204 F. RAMSTETTER ET AL PDLISHING IIACHINE Original Filed Dec. 13, 1918 B sum-sum z P R 16,204 F. RAMSTETTER ET AL POLISHING MACHINE I Nov- 10, 1925- Original Filed Dec. 13, 1918 8 Sheets-Sheet :5

535. III.

mm m.

' Nv."1o,1 2 I 1!,{18204 F. RAMSTETTER AL PQLISHING MACHINE Original Filed Dec." 13. 1918 a Shoots-Shut 4 Nov. 10. 1925- F. RAMSTETTER El AL 8 sheets -sh eot POLISHING MACHINE Original Filed Dec. 13; 1918 w m n M w w m P k H m Nov. 10. 1925- f Re. 16,204 F. RAMSTETTER ET AL I POLISHING MACHINE Original Filed Dec. 13, 1918 8 Sheets-Shoot 6 a4'hommf Nov. 10 1925- 'F. RAMSTETTER ET AL POLISHING MACHINE Original Filed Dec.

13, 1918 8 Sheets-Sheet 7 Reissued Nov. 10, 1925.

UNITED STATES PATENT OFFICE.

FRANK RAMSTETTER AND WILLIAM J. BRITT, OF ST. LOUIS, MISSOURI, ASSIGNORS TO SIMMONS HARDWARE COMPANY, OF ST. LOUIS, MISSOURI, A CORPORATION OF MISSOURI.

POLISHING MACHINE.

Original No. 1,356,737, dated October 26, 1920,-Seria1 No. 266,630, fil ed December 13, 1918. Application for reissue filed October 16 To all whom it may concern:

Be it known that we, FRANK RAMs'rETTER and WILLIAM J. BRITT, citizens of the United Statesof America, residents of the city of St. Louis. in the State of Missouri, have invented "certain new and useful Improvements in Polishing Machines of which the following is, a full, clear, and exactdescrip tion, reference being had to the accompanying drawings, forming a part of this specification.

This invention relates to improvements in polishing machines. and more particularly to a machine whereby the polishing element and the articles to be polished are manipulated automatically. The machine We have shown to illustratethe preferred form of the invention is particularly adapted for polishing the blades of pocket knives. It'is capable of handling many knives at the same time, and owing to the peculiar manner in which the several cooperating elements are actuated, each blade isuniforinly polished throughout its exposed surfaces. and this is accomplished'without impairing the temper of the blades. Furthermore, no skill is required on the part of the operator of the machine. and the polishing operation is not injurious to the healthof the operator.

The main object of the present invention is to produce a combination of cooperating machine elements serving as a highly efficient substitute for many skilled operators, the machine herein disclosed being adapted to be placed under the control of a single unskilled operator. Instead of polishing only one knife at a time, a group of knives are automatically manipulated at the same time. and each individual knife is most effectively subjected to the desired polishing operation. Y

The preferred form of the invention comprises a rotary'polishing roll having a fiexible or yielding polishing face, and a knife holder whereby groups of knives are held during the polishing operations. Either the polishing roll or the knife holder should be movable, so that one will'move toward the other for the purpose of placing the blades 0 in contact with the polishing roll, and this movement should be continued for the pur- 1922, Serial No. 594,954..

pose of polishing each blade throughout its length. To avoid the production of streaks on the highly polished blades. i. e., to give each blade a uniform polish, either the polishing roll or theknife blades should also move longitudinally of the roll By moving the blades transversely of the rotary polishing roll and at the same time imparting a longitudinal movement to the roll, each blade is exposed to various peripheral portions of the rotating roll, and the blades are not liable to be streaked by a constantly repeated engagement with an irregularportion of the roll. The desired relative movements are preferably obtained by moving the knife holder toward and away from the rotating polishing roll, thereby moving the knife blades transversely of the roll. with which they are engaged, and at. the same time 'movin g the rotating roll back and forth in a line parallel with its axis. This combination of movements corresponds to, but difiers from, movements which are ordinarily given to the knife alone by a skilled op erator. However, the machine movements are more positive and certain, and they can be timed and adjusted to give themost satisfactory results. To obtain the desired frictional engagement between the polishing roll and the blades, yielding means such as a spring may be utilized to press the blades I onto the roll, and the pressuremay be varied,

as will be hereinafter pointed out.

The'danger of overheating the blades may be positively avoided by subjecting the blades to successive polishing operations and permitting them to cool during the intervals of time between the operations. This also enables the blades to be inspected at frequent intervals so that they may be removed from the machine as soon as the desired polish is obtained. To avoid undue loss of time, several groups of knives may be maintamed 1n the machine, and. the knlfe holder may be actuated to successively and repeatedly bring the several groups into cooperative relation with the polishing roll, thus enabling the roll to act upon one of the groupswhile the others are cooling and exposed for inspection.

With the foregoing and other objects in y hends changes, variations and modifications which come within the scope of the claims hereunto appended.

Figure I is atop or plan view of a knife polishing machine constructed in accordance with the invention, showing the knife ca1' riage as it appears when the blades, are separated from the polishing roll.

Fig. II is a front elevation of the machine.

Fig. III is a View ofthe left side of the machine.

Fig. IV is a rear elevation of the machine.

Fig. V- is aview of' the right hand side of the machine, showingtheknife vcarriage as it appears when'on ofthe rows of-knives is engaged with the polishing roll.

F ig. VIis an enlarged fragmentary view, partly in section showing the polishing roll and the knife carriage, theknife blades being separated from the roll.

' Fig. VII is a fragmentary front elevation showing thel neans for operating the polish I ing, roll.

' Fig. VIIIis an enlarged fragmentary detailview of the polishing roll, showing the manner in which the polishing disks are assembled on the shaft.

Fig. IX is a detail view of one of the polishing disks.

Fig. X is anenlarged detail vlew show ng a group of abutmentswhich are carriedlby the knife carriage. and .the guideway' in wh ch said abutments. travel.

Fig. XI is a plan view of one of the knife holders.

Fig. XII holder.

Fig. XIII is a transverse section of the knife holder. taken approximately on the is a rear elevation of the knife line XIIIXIII, Fig. XI, showing one of the knives clampedin the holder.

Fig. XIV is an enlarged detail viewillus- I trating the manner in which the knives are delivered to the polishing roll. 7

Fig XV is adetail View of a, portion of the means fo'r adjustingthe polishing roll.

' The machine illustrated in Ithe drawings comprises ahrotary polishing roll. knife holders adiacent tosaid roll, and operating.

means whereby power is transmitted to the polishing roll and" knife holders Before describing the operating mecha nism and the various minor details. we willdeseribe the polishing, ifoll and knife holders, and briefly 'point out the maiiner'jin' which these' parts swe ne by t e pret e s-mea collar 4 fined to said nut 5 screwed onto the shaft.

"at-the periphery of the roll.

the sametime. ts point to the handle. movement transversely eof the roll should be imparted to The polishing roll Acomprises a shaft 1 rotatably mounted in bearings 2, flexible polishing disks 3 mounted on said shaft, a shaft and a clamping Each polishing disk 3 (Figs. VIII and IX), is preferably made of felt or other suitable-flexible material, and each disk is .sli'tted radially to provide free flexible polishing "tongues In assembling the elements of the polishing roll, theflexihle disks 3 are arranged ingroups'as shown in Fig. VIII, and separating collars 6 are interposed between the adjacent groups. After all of these flexible disks and separating collars have been mounted on the shaft, the clamping nut 5 is screwed onto the threaded portion of the shaft and tightened, thereby firmly clamping all of thedisks and separator collars betweenthe fixed collar 4 and thenut 5. The polishing elements are thus securely fastened to the shaft.

It is important to observe that the sep arator collars 6 are smaller in dianjlefer than the flexible disks 3,, and that the flexible polishing tongues are free to bend over the adjacent separator collars. A machine constructed as herein shown has been used to polislrthousa nds of knives, and actual ex periencehas shown that the polishing roll just described willvery effectively perform its functionswhen associated with the other elements of the machine. polishing tongues yield freely to engage the irregular, 'or uneven, faces of the knife blades, and when the polishing roll is reciprocated longitudinally. as will be hereinafterdescribed, thepolishing tongues bend freely while in contact with the knife blades, thereby exposing the blades to various different portions of each polishing tongue.

knife blades is acted upon. by the polishing roll. all of said blades being polished at To polish each blade from either .the knives or to the roll itself. and we preferably accomplishthis result by moving the row of knife blades back and forth across ,theyieldin'g periphery of the polishing roll. To avoid the production of streaks f on the blades and to uniformly polish the The flexibletherefore rotated on its axis and at the same time reciprocated in a line parallel with its axis. )Vhile this peculiar combination of movements is transmitted to the polishing roll, a row of knife blades is moved back and forth on the flexible polishingtongues at the periphery of the roll. The ,row of blades and the polishing roll are thus. manipulated to most effectively obtain the desired polishingv action, without the attention of a skilled operator.

The knife holding carriage comprises a rotatable shaft '4" mounted in bearings 8, said shaft havlng a relatively large square portion 9 which lies between the bearings, and

spring arms 10 secured to and extending from said square portion. The spring arms 10 are arranged 1n pairs, and each of said arms hasa projecting abutment 12 adapted to be engaged by a knife holder, as will be nected to the spring arms at 14, each arm.

being provided with oneof these screws.

" Each knife holder comprises a .pair of presently described. 13 designates attaching screws,( Figs. .1 and VI) pivotally conelongated clamping plates 15 and 16 (Figs. VI, XI, XII. and XIII) connectedv together by means of clamping bolts 17. Yielding material (Figs. VI and XIII) such as felt ,18 and rubber 19 is preferably interposed between the clamping plates. and a row of knives K may be interposed between the yielding

elements

18 and 19. In securing the knives to a knife holder,

"the nuts on the clamping bolts 17 are lloosened. and the knife handles are inter posed between the yielding elements .18 and. .19. The clamping bolts17 are then tight ened to force clamping

plates

16 and 17 toward each other. thereby securing the knives. The knife blades exto theknife holder. tend fromthe holdea as shown by Figs. I, XIII and .XIV. The ends of each knife holder are provided with slots 20 (Fig. XI)

' carriage.

for the reception of the pivotally mounted screws 13 (Fig. VI). whereby the knife holder is detachably secured to the knife seated on the free ends of pair of spring arms 10. the screws 13 arev turned on their pivots and inserted into theslots 20in the ends of the knife holder. and the nuts 13' ,are tightened to firmly secure the knife holder to the spring arms. The rear edge of "each clamping plate 15 is provided with a flange 2l Figs. XI, XII and XIII) and the clamping plate 19 has a flange 22 which After a knife holder has been engages said flange 21. When a knife holder is properly mounted on the knife car'- ria e, the flange 21 on the knife holder engages lugs 12 on the spring arms, as shown by Fig. VI.

It will now be understood that the knife carriage may be provided with a succession of knife holders, equally spaced around the axis of the carriage (Fig. VI) and-that each knife holder may be provided with a row of knives. The knife carriage is moved toward and away from the polishing roll for the purpose of moving the knife blades across the peripheral face of the roll, and the knife carriage is also turned step by step for the purpose of successively locating the rows of knives 111 positions adjacent to the polish ing roll. To provide for the transmission of 'an oscillatory movement to the knife carriage, the bearings 8, in which said carriage is mounted, are secured to long arms 23 (Figs. I and IV) and the lower ends of these arms are pivoted at24. Operating the links 25 (Figs. I, II and VI) are pivotally secured to theupper ends of the long arms 23, and power is transmitted throught-hese links, as will be hereinafter described, for

the purpose of mo-vingthe knifecarriage toward and away from the polishing rolls.

vWhen theknife carriage occupies thel inoperative position shown by Fig. I, all, of the knives are separated from the polishing roll A, and when said carriage is shifted to the position shown by Fig. V, the knife blades of one row move across the polishing face of the roll, and the adjacent ends of the knife handles may engage the polishing roll. Fig. XIV also suggests the manner in which the? knife blades are deliveredto and move across the polishing roll. By oscillating the knifecarriage toward and away from the polishing roll, the knife blades engage with the" yielding peripheral faceof the rollpand each blade is acted .upon from its point to the knife handle. i h

. The polishing roll turns. at ,a relatively high peripheral speed in the, direction indicated by the arrow in Fig. XIV, while the knives move back and forth as indicated by the full lines and dotted lines. The knives] are yieldingly supported by. the spring arms 10, and their pointed ends-are primarily extended toward the polishing roll as shown by full lines in XIV. Asthe knives advance toward .the positions shown by dotted lines, the pointed ends of the blades engage the yielding roll, but inasmuch as said roll is turning ata relatively high speed and in a direction conforming (one-fourth of a revolution) and the next succeeding row of blades is thereafter delivered to and withdrawn from the polishing roll.

The means for imparting an intermittent step by step rotary movement to the knife carriage comprises four projecting abutments 26 extending from each end of the carriage, there being one abutment for each of the four knife holders. These abutments 26 (Figs. VI and X) are equally spaced M (Figs. I and V) and various power transabout the axis of the knife carriage, and they cooperate with an abutment arm 27 "which'is pivoted at 28 to a stationary part ward the polishing roll.

7 of the machine. When the knife carriage moves toward and away from the polishing "roll,'the projecting abutments 26 travel between stationary guide bars 29 and 30 (Figs. VI and While the carriage is moving away. from the polishing roll, one of the abutments 26 strikes the abutment arm 27,

as shown in Fig. X, and atsthis time. the several abutments 26 lie directly above a cam 30 extending from the guide 30. The abutments 26 are then free to move about the axis of the carriage, and as the carriage continues to move away from the polishing roll, one of the abutments 26 is retarded by engaging thepivoted abutment arm 27. As a consequence the carriage turns on its axis while .it is moving away from the polishing roll. The free end of the abutment arm 27 is lifted slightly in response to the move mentof the abutment 26 occupying the position designated a in Fig; 'whileft he abut-v ment in the position b rises'overthefinger 31", and the abutment in the position 0 eventually moves into the recess 32. below..the finger 31. When the knife'carriage reaches the extreme position most distant from the polishing roll, the several projecting abutments 26 occupy the positions shown in Fig. VI. The carriage thenbegins tov move to- The highest abutment 26, moving with the carriage, passes idly under the pivotally mounted abutment 27, and the lowest abutment 26 engages a cam face on the member 30 so as to impart a slight movement to the carriage immediately before the abutments pass between the parallel portions of the

guidemembers

29 and 30. The slight movement just referred to serves to aline the abutments 26 with the guide bars 29 and 30, and as the carriage cont inues in motion toward the polishing roll these guide bars cooperate with the abutments 26 to prevent accidental rotation of the carriage.

33 designates ratchet wheels (Figs. II, V and VI) fixed to the shaft 7 which forms part of the knife carriage, and 34 designates gravity pawls cooperating with said ratchet wheels. The pawls are pivoted to the long oscillating arms 23 which support the knife carriage. Vhen a row of knives is engaged with the polishing roll, as shown by F lgs. V and XIV, the spring arms 10 supporting the knives are placed under tension, and at this time the carriage should be positively prevented from turning on its axis. The projecting abutments 26 and their guide bars 29-30 tend to prevent such movement, and the movement is positively prevented by the pawls 34 which cooperate with'the ratchet wheels 33, as shown in Fig. V.

The driving mechanism comprisesa motor 36 designates a'pulley shaft 1, which forms part of the polishing roll. A belt 38' transmits movement from the pulley 36 to the pulley 37,, and arotary movement is thus transmitted from the motorto the polishing roll. The pulley 37 is fixed to the shaft 1, and an elongated pulley 39is also fixed to said shaft. .40 designates a power transmission shaft arranged parallel with the shaft 1 and provided with a large. pulley 41. A belt 42 is mounted on the pulleys39 and 41 forthe purpose of imparting a relativelyslow rotary movement to the shaft 40. A small pulley 43 is fixed to the shaft 40, and a pulley 44 is loosely mounted on a shaft 45 at the rear of the machine. 46 designates a belt whereby movement is transmitted from the small pulley 43 to the larger pulley 44, and C designates a clutch device whereby the pulley 44 is normally fixed to the shaft 45. This clutch device includes a shiftablemember 47 movable longitudinally of the shaft 45 for the purpose of connecting and disconnecting the pulley 44 to and from said shaft. The shiftable member 47 is operatedthrough the medium of a lever 48 pivotally supported at 49 and provided with a forked end, which cooperates with the member, 47 for the purpose of shifting said member 47 on the shaft 45. We do not deem it necessary to show or describe all of the details of this clutch device, its sole function being to control the transmission of movement from the pulley 44 to the shaft 45. I/Vhen the clutch is re.-. leased, the polishing roll will be actuated independently of the other elements of the machine, and when power is transmitted through the clutch all of the driving mechanism will be actuated by the mot-orl .shaft.

The means for oscillating the long arms I 23, which support the knife carriage, comprises the connecting links 25 pivoted to the upper ends of said arms, a rotary shaft 50 at the rear of the machine, a crank 51 fixed to one end of the rotary shaft 50, and a gear wheel 52 fixed to the opposite end of said One of the links 25 is pivoted to the wrist pin of the rotary. crank 51, as shown in Figs. I and V, and the other link 25 is pivoted to a similar wrist pin 53 carried by the gear wheel 52, as shown in Figs. I, III and VI. It will now be understood that a rotary movement of the shaft 50 will result in the transmission of an oscillatory movement to the long arms 23 which support the knife carriage. The knives are thus shifted toward and away from the polishing roll.

The means for transmitting a rotary movement to the shaft 50 comprises a pinion 54 meshing with the large gear wheel 52, said pinion being fixed to a short shaft 55 at the rear of the machine (Figs. III and IV). A relatively large gear wheel 56 is also fixed to the short shaft 55, and this wheel 56 meshes with a pinion 57 on the shaft 45. The rotary movement of the shaft 45 therefore results in the transmission of a relatively slow rotary movement to the shaft 50, whereby the links 25 are driven.

We have previously stated that the polishing roll not only revolves on its axis but is also reciprocated in a line parallel with said axis. To provide for the reciprocating movement, the shaft 1 is free to move longitudinally in its bearings 2 (Fig. I), and the pulleys associated directly with shaft 1 are wide enough to permit such movement without becoming disengaged from their belts. The means for reciprocating the polishing roll comprises a collar 58 (Figs. I, II and IV) loosely mounted on the shaft 1, said collar being arranged between a pair of collars 59 which are fixed to the shaft 1. An upright shifter lever 60 (Fig. IV) is forked at its upper end to receive the last collar 58. This forked end is secured to the collar 58 for the purpose of moving said collar to the shaft 1 in a direction parallel with the axis of the shaft. The shifter lever 60 is pivoted at 61 (Fig. IV). 62 designates a link connecting the lever 60 to an arm 63 fixed to the oscillatory shaft 64. An operating arm 65, fixed to the shaft 64, is con nected by means of a flexible coupling 66. to the lower end of a long upright link 67. The upper end of this long link is pivoted to the wrist pin of a rotary crank 68 fixed to one end of the rotary shaft 45. The short crank 68 is shown in Figs. IV and V. Through the medium of the'mechanism just described, movement is transmitted from the rotating shaft 45 to the shifter lever 60 whereby the polishing roll is reciprocated in a line parallel with its axis.

When the machine is in operation the polishing roll revolves on its axis, and at the same time moves back and forth in a line parallel with said axis. While this peculiar movement is being imparted to the polishing-roll, the knife carrier moves toward and away from the polishing surface, thereby delivering the blades to said polishing surface and moving them back' and forth transversely of the polishing roll. As previously pointed out, the knife carrier also turns one-fourth of a revolution immediate ly after each polishing operation, thereby moving one row of knives away from the polishing roll and at the same time moving another row toward said roll. The rows of knives are successively engaged with the polishing roll, and they are subjected to repeated polishing operations until the desired results are obtained. Immediately after each brief polishing operation, the row of knives passing from the polishing roll is shifted toward the front of the machine where they may be easily inspected by the operator, and the knives are permitted to cool before being again engaged with the polishing roll. The intermittent polishing operations not only enable the knives to be inspected at frequent intervals, but they also enable the desired polish to be obtained without in any way impairing the temper of the knife blades, the metal being permitted to cool during the intervals between the repeated polishing operations.

After the desired polish has been obtained on 'one of the faces of each knife blade, the positions of the knives are changed for the purpose of subjecting the opposite faces to the polishing operations. The positions of the knives may be changed by removing the knife holders from the machine and then turning each knife in the holder. To turn the knives in this manner it is necessary to loosen the clamping bolts 17 (Figs. XI and XIII) so as to loosen the knives between the clamping

plates

16 and 18. However, the same result may be obtained without loosening the knives in their holders. Each end of the knife holder is slotted at 20 (Fig. XI) to receive the attaching bolts 13 (Fig. VI) on the knife carriage, and if the nuts 13' are loosened to permit the removal of a knife holder, said holder may be inverted and replaced with the unpolished faces of the knives exposed to the polishing roll.

The knife carriage is actuated through the medium of-the shaft 50 at the rear of the machine (Fig. I) and the clutch actuating lever 48 may be shifted at any time to discontinue the transmission of movement to the knife carriage. This enables the knife holders to be attached to and removed from the machine without stopping the. electric motor M. It will also be observed that the driving pulleys and the gear wheels are so proportioned that the polishingrollwill be driven at a relatively high peripheral speed while it is reciprocating at a much lower speed; The knife carriage also moves at a low speed relative to the peripheral-speed lowering the polishing roll. 7

The bearings 2, in which the shaft 1 ismounted, are fixed to arm 69 (Figs; I, III and VI) pivotally supported at 70, each-of said arms 69 having a pocket 71- for the reeption of a nut 72 (Fi VI and Xv) The pocket is non-circularin cross section, as shown in Fig. XV, and'it prevents the nut from turning on the vertical screw 73. Each arm 69 is provided with one of the adjusting

devices

71, 72,73, and each of thescrews 73 'is mounted in bearings, as shown in Fig. VI. To operate both of the screws 73 at the same time, each of'said screws is provided at its lower end with a bevel gear wheel 74 (Fig. :VII) and these wheels "74 mesh with similar wheels 75 fixed to an opera-ting shaft 7 6. It will be apparent that the operating shaft may be turned to impart rotary movement to the screws 73, thereby raising or lowering'the polishing roll so as to vary the pressure at theknife blades.

A lower guard plate77 (Figs. III andV) may be secured to the front of the-machine, and an upper guard plate 78 maybe pivoted to said lowerplate. Theupper'guardplate 7 8 may occupythe elevated position shown in Fig. V to 'serve asa guardior shield in I front of the knife carriage, and said guard plate 78 may be dropped to the posit'ion shown in Fig. III to expose the knife car-- riage. 7 9 designates a latch device (Fig. V) for securing the guard plate 78 in its elevated position. I

80 designates shields (FigVII) arranged at opposite ends of the polishingiroll, and 81 is a pan mounted below said roll to receive the polishing compound" which eventually passes from the roll.

We claim:

1. In a knife polishing machineya rotary polishing roll, a yielding knife holder whereby the knives are yieldingly held with their blades engaging the periphery of said rotary polishing roll, means whereby one of said parts is moved toward and away from the other to engage different'portions of each knife blade with said polishing roll, and adjustable means for varying the frictional contact between said polishing roll and the knife blades, said adjustable means''includ ing-hearings wherein said roll is rotatably mounted, adjusting screws for moving said bearings and operating means whereby said screws are adjusted simultaneously.

2. In a polishing machine, a polishing roll, a carriage provided with a holder for the articles to be polished, means for shifting said carriage toward and away from said polishing roll to move the-articles transversely of said roll, and means whereby said carriage is turned while the articles are disengaged fro-m the polishing roll.

3. In a knife polishing machine, polishing roll, a carriage provided with "knife holders each adapted to hold a row of knives with their blades extended, means for turning said carriage to successively locate the rows of knives adjacent said rotary polishing roll, and means for shifting said carriage'to move the extended blades across the polishing roll. 7

i. In a knife polishing machine, a'polishing roll, a carriage provided with knife iolders each adapted to hold a row of knives with their blades extended, means for turn-' ing said carriage to successively locate the rows of knives adjacent said rotary polishing roll, means for shifting said carriage to move the extended blades across the polishing roll, and means for preventing said 'carriage from turning while the blades engage the polishing roll.

5. In a knife polishing machine, a polishing roll having a yielding peripheral polishing face, a carriage provided with a succes sion of knife holders whereby rows of knives are held with their blades extended fromthe carriage, means for repeatedly shifting said carriage toward and away from said polishing roll so as to move the extended rows of blades across said yielding peripheral polish ing face, and rotatingmeans cooperating with the shifting means to turnthe carriage step by step, thereby successively locating the rows of blades in positions to be acted upon by said polishing faceJ 6. In a knife polishing machine, wherein rows of knives are successively and'repeated- 1y exposed to the polishing element, a re tary carriage provided with succession of holders for the rows of knives, a rotary polishing roll, means for repeatedly shifting said rotary carriage toward andaway from said polishing roll so as to move the rows of knives acrosssaid polishing roll; andintermittent rotating means cooperating with the shifting means to turn said carriage step by step, thereby moving the succession of knife holders to deliver the different rows of blades to said polishing roll.

7. In a knife polishing machine, a rotary polishingroll, an oscillatory knife carriage, a succession of knife holders carried by said carriage, each of said knife holders being adapted to hold a row of knives with their blades engaging said polishing roll, means for oscillating said carriage from an 1noperative position wherein all of the rows of knives are separated from said polishing roll to an operative position wherein one of the rows of knives is engaged with sald polishing roll; and rotating means for imparting an intermittent step by step rotary movement to said carriage so as to succes sively locate the several rows of knives in positions to be acted upon by said polishing roll, said rotating means being effective when said carriage occupies an inoperative position.

8. In a polishing machine, a rotary polishing member, a rotary carriage for the articles to be polished, means for moving said rotary carriage toward and away from said rotary polishingmember so as to polish the articles carried by said carriage, and means whereby said rotary carriage is turned step by step, the last mentioned means including projections carried by said carriage and an abutment arranged in the path of said projections so as to be successively engaged by the several projections.

9. In a knife polishing machine, a rotary polishing member, a rotary knife carriage, a succession of knife holders secured to said carriage, each of said knife holders being adapted to hold a row of knives with their blades extended toward said polishingroll, means for repeatedly moving said carriage toward and away from said polishing member, and. means for imparting an intermittent stepby step rotary movement to said carriage so as to successively locate the several rows of knives in positions to be 'acted'npon by the polishing member, the last mentioned means including a succession of abutments on said rotary carriage, therebei'ng one of said abutments for each knife holder and said abutments being equally spaced about the axis of said rotary carriage, and another abutment cooperating successively with the aforesaid abutments to impart the rotary movement to the carriage.

10. In a knife polishing machine, a rotary polishing roll, an oscillatory knife carriage, a succession of knife' holders carried b said carriage, each of said knife holders being adapted to hold a row of knives with their blades engaging said polishing roll, means for oscillating said carriage from an inoperative position wherein all of the rows of knives are separated from said polishing roll to an operative position wherein one of the rows of knives is engaged with said polishing roll, and rotating means for parting an intermittent step by step romovement to said carriage so as to ssively locate the several rows of es in positions to be acted upon by said polishing roll, said rotating means being effective when said carriage occupies an 111- operative position, and a ratchet and pawl preventing retrograde rotary movement of said carriage.

11. In 'a knife polishing machine, a rotary polishing roll,an oscillatory knife carriage comprising a rotary shaft and knife holders secured thereto, each of said knife holders being adapted to hold a row of knives with their blades extended toward said polishing roll, means for oscillating said carriage from an inoperative position wherein all of the knives are separated from said polishing roll to an operative position wherein one of the rows of knives is engaged with said polishing roll, and means for imparting an intermittent step by step rotary movement to said carriage so as to successively and repeatedly locate the several rows of knives in positions to be acted upon by said polishing roll, the last men tioned means including projections eXtend-' ing from said rotary shaft, there being one projection for each knife holder, an abutment arranged in the path of said projections so as to be successively engaged by the several projections while the knife carriage is moving away from said polishing roll, thereby causing said carriage to turn one step after each polishing operation, a pivotal support for said, abutment allowing the abutment to yield when engaged by a projection moving toward said polishing roll, a guide for said projections having a cam face adapted to be engaged by the projections so as to cooperate therewith in turning the carriage and a ratchet and pawl preventing retrograde movement of said rotary shaft when the car'riage occupies its operative position;

In a knife polishing machine, a rotary polishing: roll, a knife'holder comprising a pair of clamping members between which a row of knives is clamped with the blades extended toward said polishing roll, a carriage to which said knife holder is detachably secured, and means for moving said carriage toward and away from said polishing roll so as to simultaneously move all of the extended blades back and forth on the peripheral face of said polishing roll.

13. In a knife polishing machine, a polishing roll, a knife holder wherein a row of knives is held with the blades extended to Ward said polishing roll, said knife holder comprising a pair of clamping members between which-the knife handles are mounted and screws whereby said clamping members are forced toward each other, a support for said knife holder, screws whereby said knife holder is detachably secured to said su port, and operating means whereby all of said blades are simultaneously engaged with said polishing roll.

14. In a knife polishing machine, a rotary polishing roll, a knife holder wherein a roW of knives is held With the blades extended toward said polishing roll, a support to Which said knife holder is reversibly secured to enable both sides of the row of blades to engage said polishing roll, and operating means whereby all of said blades are simultaneously engaged with said polishing roll.

15. A knife polishing machine having in combination a polishing device, a carrier arranged to support a series of blades, means for relatively actuating the carrier and polishing device to bring the blades successively into position to present to the polishing device. and means for relatively actuating the car! or and polishing device to present the series of blades simultaneously to the polishing device and to disengage the blades from the polishing device at intervals to allow the blades to cool.

16. A knife blade polishing machine having in combination a polishing roll, means for rotating the roll, a carrier arranged to support a seriescf blades, means for rela tively actuating the roll and carrier to the series of blades together back and forth across the periphery of the roll in Contact therewith in a direction transverse to its axis, and means for relatively reciprocating the carrier and roll in the general direction of the axis of the roll during said back and forth movement.

17. A knife blade polishing machine having in combination a polishing roll, means for rotating the roll, a carrier arranged to support a series of blades With their longitudinal axes extending in the same general direction, means for relatively actuating the roll and carrier to carry the blades back and forth endWise across the periphery of the roll in a direction tangential thereto, and means for relatively reciprocating the carin parallel relation to each other, and means for moving the carrier to carry the blades ofa series of knives together enc Wise into and out of contact with the polishing roll a and forth across the same in a di- L tantially tangential to the roll. 7 machine for polishing knife blades having in combination a polishing roll, a reciprocatory knife carrier arranged to carry a series of knives with the blades thereof in substantially parallel relation to each other, m s for actuating the carrier to bring knives successively into position to be presented to the polishing roll, and means for reciprocating the carrier from said position to carry the blades of a series of knives together endwise into and out of contact With the polishing roll and back and forth across the same in a direction substantially tangential to the roll. L

20. A machine for polishing knife blades having in combination carrier for carrying a series of blades in substantially parallel relation, means for actuating the carrier to move blades transversely of the length in succession into position to be presented to the polishing roll, means for moving the carrier to move the blades endWise in a direction substantially tangential to the roll into and out of contact With the same and back and forth across the surface of the roll.

Signed at St. Louis, Missouri, this 9 day of October, 1922.

FRANK RAMSTETTEB. WILLIAM J. BRITT.