US1881527A - halvorsen - Google Patents

Description

1932- E. J. 5. HALVORSEN 1,381,527

SKINS, AND LEATHER 5 Sheets-Sheet 1 Fig.1

MACHINE FOR OPERATING UPON HIDES,

Filed Nov. 15,. 1929 INVENTOR Get. 11, 1932. E. J. s. HALVCRSEN 1,881,527

AND LEATHER MACHINE FOR OPERATING UPON HID ES SKINS,

Filed Nov. 15, 1929 5 Sheets-Sheet 2 M 4 T. N l I Oct. 11, 1932. E. J. s. HALVORSEN 1,881,527

AND LEATHER MACHINE FOR OPERATING UPON HIDES, SKINS,

Filed Nov. 15, 1929 5 Sheets-Sheet 3 INVENTQR 1932- E. J. 5. HALVORSEN 1,881,527

SKINS, AND LEATHER MACHINE FOR OPERATING UPON HIDES,

Filed Nov. 15, 1929 5 Sheets-Sheet 4 Oct. 11, 1932. E. J. 5. HALVORSEN MACHINE FOR OPERATING UPON HIDES, SKINS, AND LEATHER Filed Nov. 15, 1929 5 Sheets-Sheet 5 INVEN TOR 'invention and various important features Patented Get. 11, 1932 men, J. s.

TANNIN G IJACEIZNERY COIHPANY, OF PORT IVIACHINE FOR QPERAI'ING- UFO Application filed November This invention relates to machines for op-. erating upon hides, skins and leather and is illustarted as embodied in a machine for put ing-out operations upon pieces of leather. It is to be understood, however, that the thereof are not limitedto putting-out operations upon leather but that they may have other applications and uses.

- One wellknown type of putting-out machine comprises work supports or'tabl-es each having flat parallel sides and a convexly curved edge, so that a portion of the work rests upon the covexly curved part while other portions of the work rest upon the flat parallel sides of the work support or table. Commonly, bladed cylinders or bladed members mounted on bed plates are provided for operating upon the work where it is backed '3 by the lat surfaces of the table as the latter igg ment from the instrumentalities mentionedr passes between two of the bladed cylinders ortwo of the bladed bed plates, the portion of the work on the convexly curved edge of the work support or table receiving no treat- Various means have heretofore been proposed for operating upon that portion of the Work which rests upon the conveXly curved part of the work support or table. lVhile some or" the means proposed are simple in construction they are lacking in effectiveness so that the quality of the work is unsatisfactory. Furthermore, the devices suggested in the past were diiiicult to control, were variable in operation, and not unlikely to cause injury to the work.

.lt is an object or this invention to provide, a machine or the type described, improved means for operating upon the work where t is supported by the curved portion of a *0 support or table, the purpose being to c "e worl; or" the highest qualityand uniand to el ninate the possibilt-y 01"? inury to work.

To these ends, and'in accordance with an important feature of the invention there is provided, in the illu trated construction, means con'ipr o'ng a working member having e. plurality or blades arranged for movement in sets over the surface of a piece of work HALVORSEN, 0T1 SALEM, MASSACHUSETTS, ASSlGNOR TO THE TTRNER LAND, MAINE, A CORPORATION OF MAINE worl: supporting surface;

suits in the desired ment FFIQ

It HIDES, SKINS, AND LEATHER 5, 1929. Serial No. 407,523.

curved surface of a work. support to put-out moisture from the piece 'o'liwork and to stretch the latter in a uniform manner in directions extending lengthwise of the curved Since the median longitudinal portions (the backbone portions) of a hide or skin, usually positioned o\ r the curved part of the table, are more it Ltant to stretching operations than the side portions thereof, repeated operations by blades moving in sets longitudinally ofthe median portions of he hide or skin can be depended upon to secure more effective redirection than those obned by prior constructions. In order that A ions of the worls: on thecurved surface or the worksupp rt maybe put-out progressively throughout all of the width of the curved work supporting surface, meansv is provided for moving the working member 7 blades a curved path concentric with respect to the curved surface of the support, the construction andarrangesuch tiiat the blades move bodily while they are also moving along in'said pa lines which extend longitudinally of the curved surface. Gonveniently, also the blades are caused to move to maintain alwa s the )KODEF an 'ular relation'to the L C) curved surface at the same time that they the described concentric path. b the construction and arrangement of the blades the" are caused to put-out the inoisure progressively over relatively restricted areas or" the worlrin any given as those specially constructed for performing unhairin'g operations on hides and skins. Furthermore, the work-treating members may be tools of various kinds, it being obvious that the invention resides not in a special tool, but in novel means for securing proper co-operation of a tool and a work support.

These and other important features of the invention together with novel combinations of parts will now be described in detail and then pointed out in the appended claims.

In the drawings,

Fig. 1 is a plan view from above of a portion of a putting-out machine illustrating one embodiment of the invention;

Fig. 2 is a view taken along the line IIII of Fig. 3, parts being broken away or omitted the better to show the relation of other parts;

Fig. 3 is a view taken along the line IIIIII of Fig. 2 looking in the direction of the arrows, and showing the parts just after the begining of operations on a piece of work;

Fig. 4 is a view similar to Fig. 3 showing completion of an operation;

Fig. 5 is a view similar to Figs. 3 and 4 with the housing just being unlocked preparatory to a return to initial position;

'Fig. 6 is a section taken along the line VI-VI of Fig. 1.; and i Fig. 7 is a sectional view taken along the line VII-VII of Fig. 2.

In the illustrated machine, which is designed especially for putting-out operations on hides and skins, there is provided a pair of frame members 2 arranged to provide bearings for a shaft 4 to which is fastened a pair of sprocket wheels 6 for endless sprocket chains 8 which also pass over'other sprocket wheels not shown in the drawings. Pivotally secured to the sprocket chains 8 is a series of tables, each adapted to carry a hide or skin 9 (Fig. 1) folded over the curved surface thereof. One of the tables is shown at 10, in each of the figures of the drawings with the exception of Fig. 2, the table 10 being pivoted to the sprocket chains 8 at 11 and 12 (Fig. 5). As the tables 10 are carried along by the chains 8, pieces of work on the flat parallel surfaces of the tables are operated upon by bladed members, not shown, the arrangement of tables and tools being preferably that disclosed in United States Letters Patent No. 691,306, granted Jan. 14, 1902, upon application of E. E. Chain and W. B. Turner.

As illustrated, the means provided for operating upon that portion of the work which is supported and backed by the convexly curved surface of the edge portion of the table comprises a working member 13 having blades 14 carried in sets by four endless carriers or chain members 16, 18, 20 and 22 (Figs. 1 and 6), supported by sprockets 24'and 25 (Fig. 2)

' mounted upon shafts journaled in a housing 26. Upon reference to Fig.1 of the drawings it will be observed that the upper runs of the carriers or chain members 16 and 18 move toward each other as indicated by the arrows in said figure. It follows that the lower runs of these chain members 16 and 18, with their blades 14 in contact with the work, move away from each other in opposite directions toward opposite ends of the table 10. The same is true of the carriers or chain members 20 and 22, the upper runs of which move toward each other as indicated by the arrows in Fig. l, the lower runs of these same chain members with their blades 14 moving away from each other in opposite directions toward opposite ends of the table 10. It will be observed, furthermore, that the interval or spacing between the chains 16 and 18 is staggered with respect to the similar interval or spacing between the ends of the chains 20 and 22 so that, during the travel of the work, the small space on the piece of work not operated upon by the blades of the chains 16 and 18 will be operated upon by the blades of the carrier or chainmember 20, while the blades of the carrier or chain member 16 take care of the portion of the work untreated at the space between carriers 20 and 22.

Upon reference to Fig.2, it will be observed that the end sprockets 25 for the chain members 16 and 22, respectively, are keyed to a shaft 28 journaled in an expanded end portion 30 of the housing 26, while the end sprockets 24 for the chain members 16, 18, 20 and 22 respectively are carried by shafts 27 also mounted in the housing 26. The reason for expanding the housing at portion 30 is to provide room for a bevel gear 32 fixed to the shaft 28 which carries the sprockets 25, As shown, bevel gear 32 meshes with another bevel gear 34 keyed in turn to a shaft 36 journaled in a bearing 38 which is fixedly attached to a segmental member 40 fixedly secured to a shaft 42 journaled in frame members 44 secured by bolts 46 to one of the frame members 2. At this point it should be observed that the mountings for the housing 26 .and the means for moving the housing and for operating the blade carriers or chain members are the same at each end of the housing, as clearly disclosed in Fig. 1 of the drawings. For driving the shaft 42 there is secured thereto at one end a pulley 50 (Figs. 1 and 2) arranged to be driven continuously from any suitable source of power. Keyed to the shaft 42 is a sprocket wheel 52 (Fig. 2) about which passes a chain 54 (Fig. 1).which engages also with a sprocket 56 (Fig. 2) keyed to the shaft 36. Hence shaft 36 is continuously driven and, through bevel gears 32, 34, continuously drives the shaft 28 to which is attached the sprocket wheels 25 for driving the chain members 16 and 22. As will be obvious from an inspection of Fig. 1 chain members 18 and 20 are driven through a similar arrangement of sprocket wheels, sprocket chains and bevel gears similarly numbered at the other end of the housing 26.

As most clearly disclosed in Fig. 6, each blade 14 is riveted to a chain link 57, there being interposed between the base 59 of the blade 14and the link 57 an elastic member 61 which is compressible to a limited extent to provide a certain predetermined yielding of the blade 14 in accommodation to variations in the thickness of the work. Fig. 6 taken along the line Vl-Vl of Fig. 1 indicates that the housing is solidly made in portions thereof in order to withstand bending strains and to provide guideways 63 for the chain or blade carriers 16, 18, 20 and 22. At other places the housing 26 is cut away to receive the shafts 27 and to provide spaces, such as that shown in Fig. 7 for the carrier members or bladed chains to pass around the sprocket wheels 24 from one side to the other of the housing. The chain links 57 have overlappingportions pivotally connected by )lllS (Figs. 3 and '1') which carryspacing rollers 6? which also serve as anti-friction members as will be evidentupon inspection of Figs. 6 and 7.

Upon inspection of 3, 4 and 5, it will be so .1 the working member 13, with the bladed chains carried thereby, must move bodily along with the table 10 during the movement of the table h the sprocket chains 8. For moving the working member and the his 1 chains 16, 18, 20,22, for the purpose den ibed, ti re is fixedly attach-ed to the shaft 42 a segmental gear 60 (Fig. 3) arranged to m sh with a segmental gear (52 seornied to a .0 ft 6 1 which carries fixedly secured thereto a pinion 66 in mesh with a ear 68 rotatable on a stub shaft 70, gear being constantly in mesh with a pinion 72 rotatable on a stub shaft 74, the pinion 7 2 being in mesh with a pinion 76 keyed to the she-ft '7. Upon inspection of Figs. 1 and 2 itwill be seen that the shafts 64, and 74 e mou ted in the auxiliary frame men'sbers 44. Since the shaft 42 driven from the shaft 7 for a predetermined period of time through the meshing of the segmental gear members 60 and 62, the bodily movement ofthe working member 13 (and the bladed chains carried thereby) in the direction' of the arrow 78 in Fig. 3, may be timed with respect to the movement of the table 10 (also driven from the shaft 7) through proper construction and arrangement of the pinions and gears which constitute the drivin g means for thesegmental gear 60 fastened to the shaft 42, it being recalled that the member 40 which carries the journal member 38 for the shaft 36 of the housing 26 is also secured to the shaft 42.

Upon reference to Fig. 3 of the drawings it trill :beobserved that the blades 14 carried by chains 16 and 22 in the housing 26 are just beginning their operations upon that part of the work which is supported by the convexly curved end portion of the table. As the table, 10 continues in movement with the sprocket chains 8 (moving in the direction of the arrow 80 in this figure), the said table 10 is also caused to swing about its pivotal supports 11 and 12 on the chains 8 so that the table 10 finally occupies the position shown in Fig. 4, the bladed chain members having moved during this time bodily through the are of a circle about the center of the shaft .42 and by doing so the blades have been in position to work upon the whole of the convex surface of the curved end of the table from. one flat surface of the table to the other.

After the table 10 passes by, the blades 14 being out of contact with the work on the flat surface of the table as indicated in Fig. 5, means is provided to become operative to return the working member 13 with its bladed members and housing 26 to the position shown in Fig. 3, preliminarily to operation on work on a second table. For this purpose there is provided a segmental gear .84 keyed to the shaft 7 and adapted to mesh with the teeth of the segmental gear member 40 which fixedly secured to the shaft 42 .as before stated. When the segmental gear members 84 and 40 are in mesh, as shown in Fig. 5, the shaft 42 is rotated in .adirection the reverse of the arrow 78 (Fig. 3), namely, in the direction of the arrow 88 (Fig. 5) to return the housing and its bladed members to the pos tion shown in Fig. 3.

Upon inspection of Fig. 3, it will be observed that the blades 14 of blade carriers 16 and 22 are arranged to operate along paths closely adjacent to each other. Since the blades 14 are numerous and contact repeatedly with the work during the relatively rapid movement of the blade carriers, and since the work itself is moving sidewise, with respect to the blades, along with the slower moving table 10, there is no line of untreated work left after operation of the staggered blades 1.4 of the two carriers 16 and 22 (Fig. 1) and of the carriers 18 and 20, such as might be suggested by the slight space showing between the two blades 14 in Fig. 3.

Means is also provided for moving the working member 13 (with the bladed carriers or chains carried thereby) about an axis passing through the center of the two end shafts 36,in order that the blades 14 may make proper contact with the work covering the convexly curved end of the table 10 durin g pivotal movement of the latter. In order to accomplish this movement of the blades 14, there is provided a sprocket wheel 90 (Fig. 2) securely bolted to the housing 26 over which passes a sprocket chain 92 (Fig. 1) which also passes around a sprocket 94 (Fig. 2) fixedlybolted to one of the auxiliary tion. For causing disen frames 14. It will be understood that, as the housing 26 moves through the arc of a clrcle 1 whose center IS the axis of the shaft e2, tne working member 18 through its housing 26 will be rotated axially about the center of the shafts 36 whereby the blades are kept at the proper angular relation to the conveXly curved surface of the table 10 upon which a portion of the hide or skin rests, that is with the long axis of the blade normal to a tangent at the center of line of contact of the blade with the curved surface of the leather on the convex surface of the table.

It thus appears that the blades 14 have three motions with respect to the work. That it, they travel in paths which extend from some intermediate point of the work on the table 10 outwardly toward one edge thereof. At the same time the blades as a whole are moved in the arc of a circle about the center of the shaft 12 so that the blades may continue to operate upon the work on the travelin g table 10. And during their bodily move ment, the blades are shifted about the centers of the shafts 36 progressively with their bodily movement so as to keep the proper angular relation to the convex surface of the work on the curve-cl end of the table.

For holding the housing 26, with its blade carriers, in the position shown in Fig. 5, there is provided a locking device, comprising a hook 100 carried at the end of an arm 101 (Fig. 1) rigid with the member i which carries the bearing 38 for the housing shaft 86. For co-operation with the hook 100 there is provided a pivoted latch 102, pivoted at 104: on the frame 2 of the machine. Th s latch 102 is spring pressed by means comprising a rod 106 pressed by a spring 108 constantly operative to hold the latch in or toward operative position. Hence, when the cam-sharmd end of the hook 100 strikes the cam shaped end of the latch 102, the latter is shoved back against the tension of the spring 108 and engaged to hold the housing against displacement after segment gears 60 and 62 disenand untilsegment gears and 84 engage to return the housing to initial posigeinent or release of the hook 100 by the latch 102 there is provided on the table 10 to a cam 110 which is adapted to engage a roller 112carried by the latch 102 to release the housing for movement at the proper time, that is, just as the segment gears 4:0 and 84: are intermeshing to return. the housing to initial position for the beginning of an operation on a succeeding table. It will be understood that each table 10 of the series of tables carries a cam 110 so that the housing and blade carriers may be released in timed relation to the movement of each table. Preferably and as indicated in Fig. 3, the member carries a pin 120 which serves to limit the movement of the housing to its initial position, by contact with the frame of the machine.

In operating the machine, a piece of Work, such as a hide or skin, is placed upon one of the tables 10 preferably with the backboneent invention so that the backbone portions of the hide or skin may be operated upon to put-out moisture from those portions and to spread them smoothly in opposite directions parallel with the backbone line. Subsequently, the table willpass by the sets of tools (not shown) intended to operate upon those portions of the hide or skin backed by the flat, parallel surfaces of the table. In this Way all portions of each hide or skin are operated upon in a manner to put-out the moisture and to stretch the hide or skin in directions the most advantageous to the securing of the best results. Not only is the hide or skin freed of a considerable portion of its moisture and stretched in proper directions but the grain surface is smoothed down and extended in such a way as to remove all creases or wrinkles.

Having described my invention, What I claim as new and desire to secure by Letters Patent of the United States is:

1. In a machine of the character described, a work support, having a curved surface for supporting a piece of work, means for operating upon a piece of work backed by the curved surface of the work support comprising a plurality of work-treating members arranged to travel lengthwise of the curved work supporting surface, and means for moving the work-treating members in a direction crosswise of the curved work supporting surface to secure treatment of all portions of the work on said surface.

2. In a machine of the character described, a work support having a conveXly curved surface for supporting pieces of work, means for operating upon that portion of a piece of work which is backed by the convexly curved surface of the work support comprising a plurality of work-treatingmembers surface of the work support,'comprising a plurality of sets of tools arrangedto travel over the workon the curved surface of the work support along paths extending lengthwise of said curved surface, the sets of tools bein arran ed so that the tools in one set :3 {3

may overlap the tools in another set, and means for n "ing the sets of tools in a direction cross se of the curved work support ing surface simultaneously with their travel lengthwise of said curved surface, thereby insuring operation on all parts of the work backed by the curved surface of the work support.

at. In a machine of the character described, a work support having a convexly curved part for supporting pieces of work, and means for operating upon that portion of a piece of work which is backed by the convexly curved part of the work support, comprising a plurality of tools arranged to travel over the work on the convexly curved part of the work support along paths extending lengthwise of said conveXly curved part, means for moving the tools in a direction crosswise of the curved part of the work support simultaneously with their movement lengthwise thereof, and means for shifting the tools during said movements to maintain the operative surfaces thereof in proper an gular relation to the curved part of the work support, thereby insuring operation on all parts of the work backed by the convexly curved part of the support.

5. In a machine of the character described, a work support having a pivotal mounting and a curved surface for supporting a piece of work, means for turning the work support on its pivotal mounting, means for operating upon a piece of work backed by the curved surface of the work support comprising plurality of tools, a carrier member for carrying the tools and for moving them along the length of the curved surface of the work support, and means for shifting the tools to maintain the operative surfaces thereof in proper angular relation to the curved surface of the work support during turning movement of he latteron its pivotal mounting.

6. In a machine of the character described, a work support having a convexly curved part for supporting pieces of work, means for operating upon that portion of a piece of work which is backed by the convexly curved part of the work support comprising a plurality of tools, a carrier member for carrying the tools and for moving them in a curved path. over the convexly curved part of-the work support, and means for shifting the tools to maintain the operative surfaces thereof in proper angular relation to the curved surface of the work support during their movement in said curved path.

7. In a machine of the character described, a work support having a curved surface for supporting a piece of work, means for perating upon a piece of work which is backed by the curved surface of the'work support comprising a plurality of blades arranged in sets, and carrier members for supporting and moving the blades arranged to present two lines of blades along the length of the curved surface of the work support, the blades of one carrier member travelling in an opposite direction on the work from the blades of another carrier member, and two of the carrier members being arranged to overlap each other in side by side relation to insure that all portions of the Work upon the curved surface of the work support will be operated upon.

8. In a machine of the character described, a work support having a convexly curved part for supporting pieces of work, means for operating upon that portion of a piece of work which is backed by the conveizly curved part of the work support comprising a plurality of blades arranged in sets, and four endless carrier members for supporting and moving the blades, the carrier members being arranged in pairs, the members of each pair being in end to end relationship so as to present a line of blades along the length of the convexly curved surface of the work support, the blades of one carrier member traveling in an'opposite direction on the work from the blades of the other carrier member, there being a long and a short carrier member in each pair of carrier members.

and the long carrier members being arranged to overlap each other to insure that all por tions of the work upon the convexly curved surface of the work support will be operated upon. 7

9. In a machine of the character described, a work support for supporting a piece of work, means for operating upon a piece of work backed by the work support comprising a plurality of work-treating members arranged to travel over the work along lines extending lengthwise of the work support, means for moving the work support along a predetermined path, means for moving the work-treating members along the described lines over the work on the work support, and means for moving the work-treating members in the direction of travel of the work support and also relatively to said work support in a direction crosswise to the lengthwise dimension of said work support.

10. In a machine of the character described, a work support having a curved surface for supporting a piece of work, means for operating upon a piece of work backed by the curved surface of the work support comprising a plurality of sets of work-treating members arranged to travel in opposite directions over the work along lines extending lengthwise of the curved surface of the work support, means for moving the work support along a predetermined path, means for moving the' sets of work-treatingmembers continuously along the described lines over the work on the Work support and also in a direction transverse of the curved surface of -said work support, and means for moving the work-treating members in the direction of travel of the work support so that the operation of the work-treating members may con tinue during the travel of the work support.

11. In a machine of the character described, a Work support or table having a part for supporting pieces of work, means for operating upon a piece of work which is backed .by the work support comprising a plurality of blades arranged to travel in opposite directions over the work along lines extending lengthwise of the work support, means for moving the work support along a predetermined curved path, means for moving the blades along the described lines over the work on the work support, and means for moving the blades in a curved path and in the direction of travel of the work support.

12. In a machine of the character described, a work support or table having a convexly curved part for supporting pieces of work, means for operating upon that portion of a piece of work which backed by the conveXly curved portion of the work support comprising a plurality of sets of blades arranged to travel in opposite directions over the work along lines extending lengthwise of the conveXly curved end of the work support, means for moving the work support along a 7 predetermined curved path, means for moving the sets of blades continuously along the described lines over the work on the work support, and means for moving the blades in a curved path concentric with respect to the 'curved surface of the work support and in the direction of travel of the work support so that the operation of the blades may continue during the travel of the work support.

13. In a machine of the character described, a work support having a curved surface for supporting a piece of work, means for operating upon a piece of work backed by the curved surface of the work support comprising a plurality of blades, means for --moving the blades over the work on the curved surface of the work support, means for moving the work support in a predetermined path, means for moving the blades along in the path of the moving work support, and means for shifting the blades so as to maintain the operative edges of the blades in proper angular relation to the curved surface of the work support as the latter continues in motion.

-14. In a machine of the character described, a work support having a conveXly curved surface for supporting pieces of work, means for operating upon a piece of work which is backed by the conveXly curved surface of the work support comprising a plurality of blades, means for moving the the described convex surface of the work support, means for moving the work support along a curved path, means for moving the blades along in the curved path of the moving work support, and means for shifting the blades so as to maintain the operative edges of the blades in proper angular relation to the convexly curved surface of the work support as the latter changes its direction of movement along its curved path.

15. In a machine of the character described, a work support for supporting a piece of work, means for operating on the work backed by the work support comprisin g a housing, a carrier mounted in the housing, tools carried by the carrier, means for moving the carrier to cause the tools to travel over the work on the Work supporting surface in a direction transverse to the long axis of the work support, means for moving the work support in a predetermined path, and means for moving the housing with its carrier and tools to cause the tools to travel with the work supporting surface simultaneously with their movement over the said surface.

16. In a machine of the character described, a work support having a convexly curved portion for supporting a piece of work, means for operating on the work backed by a convexly curved surface comprising a housing, a plurality of endless carriers mounted in the housing, blades carrier by the carriers, means for moving the carriers to cause the blades to travel in sets in opposite directions from a space between the ends of the conveXly curved work supporting surface, and means for moving the housing with its carriers and blades to cause the blades to travel in a direction sidewise with respect to the first-mentioned direction of travel, so that the blades while traveling along paths parallel to the length of the convexly curved work supporting surface also travel sidewise over the supporting surface and concentrically with respect thereto.

17. In a machine of the character described, a work support having a curved surface for supporting a piece of work, means for moving the work support in the arc of a circle, a housing, a carrier mounted in the housing, aplurality of work-treating members on the carrier, means for moving the carrier to cause the work-treating members to move over the work on the surface of the work support, means for moving the housing and the contained carrier and work-treating members in the arc of a circle, and means for rotating the housing with the contained carrier and work-treating members about its longitudinal axis, whereby the work-treating members are enabled to maintain proper operative relationship to the work on said curved Work supporting surface.

18. In a machine of the character described, a Work support having a curved porfi'ition for supporting a piece of work, a housing, a carrier mounted in the housing, a plurality of blades on the carrier, means for moving the carrier to cause the blades to move over the work on the curved surface ifliof the work support, means for moving the housing and the contained carrier and blades in the arc of a circle concentric with respect to the curved work supporting surface, and means for rotating the housing with the contained carrier and blades about its longitudinal axis so as to maintain the biades in proper angular relation to the curved surface of the work where it is backed by the curved work supporting surface.

2&3 19. In a machine of the character described, a work support having a convexly curved portion for supporting a piece of work, a housing, a carrier mounted in the housing, a plurality of blades on the carrier,

zfilneans for moving the carrier to cause the blades to move over the work along the paths extending lengthwise of the convexly curved surface of the work support, means for moving the housing and the contained carrier and 36 blades in the arc of a circle concentric with respect to the convexly curved work supporting surface, and means for rotating the housing about its longitudinal axis so as to maintain the blades in proper angular relation. to the curved surface of the work where it is backed by the convexly curved Work support.

20. In a machine of the character described, a work support mounted for pivotal movement and having a work supporting surface, means for causing movement of the work support about its pivotal mounting, a

plurality of blades for operating on a piece of work on said surface, a carrier for supporting and moving the blades over the work supporting surface, a housing for supporting the carrier, pivotally mounted members for supporting the housing, and means for moving the members about their pivotal axes whereby the housing, together with its carrier and blades, is moved so that the blades may continue to work on the work support ed by the support during movement of the latter about its pivot.

21. In a machine of the character described, a work support mounted for pivotal movement and having a work supporting surface, means for causing movement of the work support about its pivotal mounting, a working member for operating on a piece of work on the work supporting surface, pivotally mounted members for supporting the Working member, the axes about which t .e pivotally mounted members turn being arranged parallel to the pivotal mounting of the Work support, and means for moving the members about their pivotal axes whereby the working member is moved so that it may continue to work on the work supported by the supporting surface during movement of the work support about its pivot.

22. In a machine of the character described, a work support mounted for pivotal movement and having a conveXly curved work supporting surface, means for causing movement of the work support about its pivo-t-al mounting, a piurlity of blades for operating on apiece of work on said eonvexly curved surface, a carrier for supporting and moving the blades lengthwise ofthe curved work supporting surface, a housing for supporting the carrier, pivotally mounted members for supporting the housing, and means for'moving the members about their pivotal anes'whereby the housing, together with its carrierand blades, is moved in the arc of a circle so that the blades may continue to work on the work supported by the convexly curved .work support during movement ofthe latter about its pivot.

In a machine of the character described, a work support, a plurality of blades for operating on a piece of work supported by the work support, a carrier for moving the blades over the work on the work support, a housing for supporting the carrier, pivotally mounted supporting members for the hous ing, said housing being pivotally mounted in the supporting members, means for moving the supporting members about their pivotal aXes,and means for rotating the housing and the carrier and blades supported thereby about the longitudinal aXis of the housing.

2st. In a machine of the character described, a work support mounted for pivotal movement and having a curved work supporting surface, plurality of blades for operating on a piece of work supported by the curved surface, a carrier for moving the blades over the work on the curved surface, a housing for supporting the carrier, pii otally mounted supporting members for the housing, said housing being pivotally mounted in the supporting members, means for moving the supporting members about their pivotal axes so that the housing, together with its carriers and blades, is moved concentrically with respect to the curved work supporting surface, and means for rotating the housing the carrier and blades supported thereby about the longitudinal. axis of the housing whereby the blades maintain proper angular ation to the curved surface during movement concentric with respect to the curved surface of the work support.

25. In a machine of the character described, a work support mounted for pivotal movement and having a convexly curved work supporting surface, a plurality of blades for operating on a piece of work supported by the conveXly curved surface, a carcentric with respect to the convexly curved work supporting surface, and means for rotating the housing and the carrier and blades supported thereby about the longitudinal axis of the housing whereby the "blades maintain proper angular relation to the convexly curved surface during movement in the described are concentric to the convexly curved surface of the work support.

26. A machine of the character described *comprising, in combination, a traveling table having a curved forward end, a working member arranged to co-operate with said curved end in operations upon a piece of work, said curved end being arranged to follow a prescribed curved path, said working member being disposed adjacent to the path of said curved end and'by a predetermined oscillatory movement along a curved path concentric with respect to the first-mentioned curved path traversing said curved end while co-operating therewith in operations upon the piece of work, and means for accomplishing the recited movements of the table and working member.

27. A machine of the character described comprising, in combination, a series of traveling tables arranged tandem and each having a curved forward end, a working member arranged to co-operate successively with said curved ends in operating upon pieces of work, said curved ends being arranged to follow a prescribed curved path at the same prescribed speed, said working member being disposed adjacent to the path of said curved ends and by a predetermined oscillatory movement in a direction transverse to the long axis of the curved end of each table successively traversing each curved end while co-operating therewith in operations upon a piece of work, the working member being arranged to return to its initial position after the passage of each table, and means for accomplishing the recited movements of the tables and the working member.

28. In a machine of the character described, in combination, a traveling table having a curved forward end, a working member arranged to co-operate with said curved end in operating upon a piece of work, said working member comprising a housing, bladed working members mounted in the housing and arranged with their inner adjacent ends overlapping and traveling in opposite directions from an intermediate portion of said housing, and means for accomplishing the recited movements of the table and bladed members.

29. In a machine of] the character described, in combination, a traveling table having a curved forward end, a working member arranged to co-operate with said curved end in operatingupon a piece of work, said working member comprising a housing, bladed working members mounted in the housing and traveling in opposite directions from an intermediate portion of said housing, said working member being arranged to oscillate about said curved end while cooperating therewith and simultaneously oscillating on its own longitudinal axis to maintain the bladed members in proper angular relation to the piece of work on the curved end of the table, and means for accomplishing the recited movements of the table and working members.

30. In a machine of the character described, in combination, a traveling table having a curved end, a working member arranged to co-operate with said curved end in operating upon a piece of work, said curved end being arranged to follow a prescribed curved path, said working member being arranged simultaneously to oscillate about said curved end and about its own longitudinal axis, and means for accomplish ing the recited movements of the table'and working member.

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

EJGIL J. S. HALVORSEN.

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