US2513799A - Finishing machine - Google Patents

Description

July 4, 1950 w. J. HELDENBRAND 2,513,799

FINISHING MACHINE Filed April 15, 1948 8 Sheets-Sheet 2 INVENTOR. WARREN d. HELDENBRAND AT b12575) 1950 w. J. HELDENBRAND 2,513,799

FINISHING MACHINE Filed April 13, 1948 s SheetsSheet 5 FIG. 22

225 INVENTOR.

. I6"! I66 /63 WAR EN d. HELDENBRAND V ///A f z: i' ATTORNEY y 4, 1950 w. J. HELDENBRAND 2,513,799

FINISHING MACHINE Filed April 13, 1948 8 Sheets-Sheet 5 @V o 1 u w" j I Z r V H6 "L1 III 10/ 11/ 1/ 1 1 11/ l I IIIIIQLll/IIIIIIII INVENTOR. WARREN d. HELDENBRAIID j ATTORNEY July 4,' 1950 W. J. HELDENBRAND FINISHING MACHINE Filed April 13, 1948 8 Sheets-Sheet 6 FIG. 10 r 4,44 44 44 44444 INVENTOR y 1950 w. J. HELDENBRAND 2,513,799

FINISHING MACHINE Filed April 15, 1948 8 Sheets-Sheet s- Fxa. 33 1.1 1.2 L3

I I I I I I I l I l- INVEN TOR. WARREN c]. HELDENBRAND ATToR HEY Patented July 4, 1950 UNITED STATES PATENT OFFICE Claims.

Thi invention relates to improvements in machines intended for finishing of articles of flat ware. It has especial reference to a machine of this type wherein the ware is subjected to the action of opposed buffs.

Incidental to the fact that contours of articles as forks, spoons and the like, are sinuous, a diiiiculty encountered in the use of machines as hitherto devised is, that the effect of the buffs upon said contours is not uniform, and the finish imparted by the use of such machines is unsatisfactory.

Advantages desired in the procedure of finishing articles of the above description are, that the finish must be consistent with the quality of the article, and with the contours thereof, and it must be so imparted that it is uniform in quality throughout the full extent of the surfaces treated; and also, that the articles may be treated in quantity and with efficiency making for economy and minimum cost,

To provide a machine for attaining the above named advantages is the object broadly stated, of my invention. The said general object, and also certain other and specific aims of my invention as will presently appear, are accomplished by, and my invention is embodied in the new construction, combination and arrangement of parts described in the following specification and illustrated in the accompanying drawings.

The several parts of my invention, as they appear in the different views in the drawings are identified by suitable characters of reference. In the said drawings;

Figure 1 is a front view of my new vertical finishing machine.

Figure 2 is a top plan view of said machine, a portion of the top of the frame broken away, and the cross beam being shown partially in cross section.

Figure 3 is a side view in the direction of arrow 3 in Figure 1, a portion of the obverse side of the hood being broken away disclosing to view the ends of the buff carriages.

Figure 4 is a rear view in the direction of arrow 4 in Figure 3, indicating the relative locations of the several hydraulic, electric and compressed air units, and piping and wiring therefor bein indicated fragmentarily.

Figure 5 is a sectional top plan view in direction of arrow 5 on broken line 5-5 in Figure 4.

Figure 6 is an enlarged front View of the machine, the hood sections removed, and a portion of the frame of the machine shown in cross section.

Figure 7 is an enlarged top plan view taken on broken line 1--'! in the direction of arrow 1 in Figure 3, the suspensor devices on the face plate being broken away.

Figure 8 is an enlarged side View of the upper portion of the machine, being shown in crosssection on broken line 8-8, and the lower portion of the machine being shown in cross-sections on line 8a8a, in the direction of arrow 8 in Figure 7.

Figure 9 is a vertical cross-section view on broken line 9--9 in the direction of arrow 9 in Figure 6.

Figure 10 is a sectional top plan view on broken line Ill-40 in Figure 3.

Figure 11 is a sectional top plan view on broken line H-ll in Figure 8, to show the lever wrists that cooperate with the templets.

Figure 12 is a vertical cross section view on broken line l2-|2 in Figure 8, to show the inner face of the rear buff carriage and discharge chute,

Figure 13 is a vertical longitudinal sectional view on broken line |3-l3 in direction of arrow I3 in Figure 11, to show the left-hand racks and pinions.

Figure 14 is a vertical longitudinal sectional view on broken line l4l4, in the direction of arrow H in Figure 11, to show the right-hand racks and pinions.

Figure 15 is an enlarged detail view of the templet cross head, and contour templet connected therewith.

Figure 16 is an end view of Figure 15, in the direction of arrow l6.

Figure 17 is a detail plan view of the head or chuck end of one buff mandrel, and of the tail end of the other buff mandrel.

Figure 18 is an enlarged detail side view of the divided bearing for tail journal of buff mandrel.

Figure 19 is a detail side view of Vertical bar and trips 25 carried by the cross beam of the machine, and as shown in Figure 4.

Figure 20 is a top plan view of Figure 19.

Figure 21 is an end view of pilot valve and dogs shown in Figure 19.

Figure 22 is a detached top plan view of left hand end portion of carrier plate llil and the suspensor bracket fixture attached thereto.

Figure 23 is a vertical cross-section View on the broken line 23-23 in Figure 22.

Figure 24 is a side view of work rack adapted for the retention of ware, as forks and the like.

3 V Figure 25 is an enlarged cross-section view on broken line 2'525 in Figure 24.

Figure 26' is an enlarged view of parts indicated 1 in Figure 24:.

Figure 30 is a view in the direction of arrow.

30 in Figure 28.

Figure 31 is a diagrammatic view indicating the hydraulic system through whichthe. power is supplied and controlled for operating the cross, beam, face plate and carrier plate.

Figure 32 is a diagrammatic view indicating the compressed air system through which power; is suppliedandcontrolled foroperating the cylinders having connection with the buff carriages. Figure 33 is a diagram of the electric system for operating the motors.

The frame of the machine comprises a deck plate 3-! preferably of steel and or suitable planformation (as illustrated in Figure 7) integrated with girders 32, supported by legs 33; and suit-- ably stayed as by braces 36. Upon said deck is a'housing 39-upon-which is integrated a towerlike structure embodying-spaced uprights M and iZ.

As indicated in Figures l, 11, 13 and 14 ofthe drawings, a rack rod i i (atleft hand side of the machine) slidable verticallyina suitable guideway therefor in column 65 meshes with a.

pinion 46' that is interconnected by a common axle to a similar pinion. liia. A rack rod 5 (at right hand'side of the machine) slidable vertically in a suitable guideway therefor in column 55' meshes with a pinion 56 that is interconnected by a common axle to a similar pinion 56a. The said rack rods M and 54 the upper ends of which are further referred to.

, threaded, and the said pinions, will'pres entlybe ,Secured to an. upright back plate 48 that is' integrated withribs 19 which extend from the rear sides of said uprights ll and 42., is. a vertical hydraulic cylinder 5!, the inlet and exhaust pipes therefor designated 52 and 53 respectively. See Figure 31'. The outward end portion of the-upwardly directed piston rod 59' of said cylinder is threaded.

A cross beam 61 with rearwardly ofiset median portion 62 embodies at itsfends, rearwardly directed brackets 64 and M- each havinga vertical bore. In thebores of these brackets are received the upper end portions of the aforesaidrackrods' M and 54 and whichare securediin the positions. to which they are adjusted, by lock nuts 65'.

The piston rod 59. of said vertical cylinder is secured as by lug fixture G7 to the said cross beam, as indicated inF-igure 9. Secured to the rear face of said cross beam, at each side of the offset median portion thereof, and arranged one above the other, are brackets lQan-d'l'i each provided with a vertical bore. See Figure 3' and 1 Figure 8. Receivedin the bores of these brackets are vertical slide rods l2 which are secured at their ends to anchor blocks 13 and i5. that in turn are secured to the faces of the uprights 4'1 and 42 as. shown in Figure 8. The said cross beam 6i so arranged in. connection with the sliderods l2 and with the piston of the said vertical cylinder 4 5| is, together with the rack rods 44 and '54, vertically reciprocable.

Secured to the frontal face of the rearwardly offset median portion 62 of said cross beam, is a horizontal hydraulic cylinder 8| through whose opposite ends pass the piston rods 82 and 83 the outward ends of which are threaded as indicated in Figure 10. Secured to the ends of said piston rods as by head blocks 84 is a vertical rectangular face-plate 38. At positions. equidistant from the vertical center of the rear side of said face plate are brackets Bil, one above the other (see Figures '7 and 8) each with a horizontal bore. Transverse horizontal slide rods 9! received in the bores ofsaid brackets have their ends secured to an chor blocks 94 which in turn are secured to the frontal. face of the said cross beam 6!. Projecting forwardly from the top portion of said face plate 88 is a lug 95 (as indicated in Figure 3 and Figure 8) through which is threaded a vertical adjusting screw 98: The said face plate 88 so arranged and interconnected with the pistons of the horizontal cylinder 8l- (Figure 10) and with the slide rods 91' (Figure. '7) is transversely reciprocable.

An elongated'carrier, plate- I01 (see Figures 1 and 6) has a' frontal lug N12 with threaded hole in which the saidscrevr 96 is received. Slide blocks [63 (see Figure 10.) that are provided at the rear' side of theend portions'of saidicarrier plate engage the ends of said face plateBt. The

said carrier plate so arranged is capable of being disposed in and heldat vertically adjusted position on the said face plate,

On the'frontal face of saidcarrier plate I01 at positions equidistant from its vertical center, are brackets i951 and Hit. The leg of one of these brackets namelm bracket N55, is provided with a vertical:- slot through which set screws iii? are passed and are screwed into the face of'said carrier plate. A fixture. lilfliis secured to the face of saidjcarrier plate withiits opposed arms above and below the base portion of said bracket I85, as indicated in Figure 23; By means of'set screws m9 and H0 in said arms the said bracket may be moved to precisely adjusted" position vertically and in which said adjustedposition it is made secure by tightening the set-screws I91.

Depending from-a crosspin H2 in eachof saidl Opposed structures. substantial in weight and mass, preferably of'cast iron, Id'esignate as buff carriages.

ribs 123a and horizontaliribs. I25. asindicated in Figure 6, Figure 11'. and'Figure. 12. The lug of each carriage is journaled' on a. shaft [26 that is rigidly secured in a support block l2ii'a; The lugs i2 i;of each carriage are jiourna'led' on a shaft l2? that is rigidly securedinwasupport.block. iZ-Ta. Projecting from the. arm 'of'each of. said end ribs is a horizontal pin I311, as shown in Figure.6 and.

in Figure 11.

The left hand endof. one carriage. (frontal car.- riage l2!) and the right hand end; of the other carriage (rear carriage I22) embodies at its upper. portion, a divided pillow block with upper part They consist-0f transverse. elongated plates 1 2"! and I QZembod'ying aligned bottom lugs. l23 l2. l and integraliext'erior spaced vertical I32 hinged on pin I33 and fastened by set screws I34.

The right hand end rib of one carriage (carriage I2I) and the left hand end rib of the other carriage (carriage I22) embodies at its upper portion, a longitudinal extension I36 (see Figure 6) which in turn embodies aligned bearings I31 and I38. In the bearings I31 and. I38 is journaled a shaft I40 upon which is secured a pulley I4 I. The shaft I40, as indicated in detail at Figure 17, is provided with a longitudinal tapered socket I43.

Each of two similar bufis consists of a mandrel I44, one end thereof formed to fit in said socket I43 and there secured by axial bolt I49 which extends through an axial bore therefor in said shaft I40, and the other end thereof, having a spindle I48 adapted to be seated in the lower half of pillow block I32. (See Figures 17-18.) The disks I45 of muslin or the like, together with intervening spacer washers I46 slipped on the mandrel are held securely clamped by a lock nut I41 at an end of each mandrel.

A lever I50 (see Figures 8 and 11) which embodies opposed lugs I5I and I52 (upper and lower respectively) in each of which is an adjusting screw I53, is fulcrumed on shaft I21 and is disposed in position adjacent the outer rib i230. of one of the carriages (carriage I2I); the pin I30 of arm of said rib I23a being in position between the ends of said adjusting screws.

The lever I55 (see Figures 9, 11 and 12) which embodies opposed lugs I56 and I51 (upper and lower respectively) in each of which is an adjusting screw I58, is fulcrumed on the other shaft I 21 and is disposed in position adjacent the outer rib I23a of the other carriage (carriage I22) the pin I30 of said rib being in position between the ends of said adjusting screws I51 and I58. The free end, each, of said levers I50 and I55, is directed downwardly. (As indicated in Figure 8.)

A lever I60 disposed between the ribs I24 of each carriage is fulcrumed on shaft I21. The free ends of said levers I60 are directed downwardly as indicated in Figure 9, to a point in registration with the plane of the centers of the free ends of levers I50 and I55. Interconnecting one of said levers I60 and the lever I50; and interconnecting the other of said levers I60 with the lever I55, at their free ends, is a cross shaft I62. Extending laterally from the free end each, of the levers I50 and I55 is a wrist I63 which embodies a pintle I66 upon which is journaled a roller I61. Each of the said central levers I60 embodies an upwardly directed bifurcated lug I65 provided with cross pin I66.

Air cylinders U and V pivotally supported by hangers I1I at the underside of deck 3| (pipes therefor designated I13 and I14) portions thereof being flexible (see Figure 32), have their piston rods connected as by links I16 to the said cross shafts I62. By control of the action of the pistons of these cylinders, the buff carriages may be swung toward each other and to advanced status (thereby placing the buffs in proximal positions) or may be swung from each other and to retracted status (thereby placing the buffs in remote positions).

Pivotally interconnecting the said carriages with the pins I66 of the lugs I65 of the central levers I60, are air cylinders W and X (see Figure 9). These cylinders, their functions, and the flexible piping I18 and I19 therefor will be presently referred to in diagram at Figure 32.

J ournaled in pillow blocks I8I and I82 that are anchored each to the deck 3|, is shaft I84 (right) and upon which'said shaft is secur'edpulleyIBB which is integrated with pulley I81. Pulley I86 is connected by belting I88 to electric motor A located underneath the deck 3I. (See Figure 1 and Figure 6.) Pulley I81 is connected by belting I89topulleyI4I.

Journaled in pillow blocks NH and I92 that are anchored each to deck 31, is shaft I94 (left) (see Figure 12) and upon which said shaft is secured pulley I96 which is integrated with pulley I91. Pulley I96 is connected by belting I98 to electric motor B located underneath said deck. (See Figure 1 and Figure 12.) Pulley I91 is connected bybelting I99 to pulley I42.

In a horizontal guideway provided in the housing which forms part of the lower portion of column 45 (at left hand side of machine) as indicated at Figure 13, a rack bar 20I rides slidingly and in mesh with pinion 46a and at a plane above the axis of said pinion.

In a horizontal guideway of guide block 203 at left hand side of machine (see Figures '1, 13 and 15) is a slide 204 which is connected to said rack bar 20I as by an extension 205 and lug parts 206.

In a horizontal guideway provided in housing which forms a part of lower portion of column 55 (at right hand side of machine, as indicated by Figure 14) a rack-bar 2II rides slidingly and it is in mesh with the pinion 56a at a plane below the axis of said pinion.

In a horizontal guideway of a guide block 2I3 at right hand side of machine (see Figure 14) is a slide 2I4 which is connected to said rack-bar 2I I as by cap screws 2 I 5.

The said guide blocks 203 and 2 I 3 are so located that the slides 204 and 2I4 therein are in registration above and in alignment with the rollers I61 of the wrists I63 of the levers I50 and I55. (See Figure 11.) Each of these slides 204-2I4 (see Figures 15-16) is of longitudinally divided formation. The upper section at its outboard end embodies a downwardly directed head 204a provided with an aperture for the reception of an adjusting screw 228 and which is provided with set nuts 229.

Coincident with the upward movement of the rack-rods 44 (left) and rack-rods 54 (right) which operate in unison, there is rearward movement of left hand rack-bar 20I and there is forward movement of the right hand rack-bar 2I I.

For supporting in quantity, in position between the opposed buffs, the articles which are to be subjected to the action of the buffs, I provide a rack structure to accord with the type and form of article to be processed. For an article, as a fork, said rack structure is of form indicated in Figure 24. End plates 2 I1, held in spaced opposed relation by longitudinal rods 2I8, are provided with pintles 2 I 9 which are adapted to be reposed removably in the hooks I I3 and I I4 of the carrier plate IOI. Each of the confronting faces of the downwardly directed narrowed portions of said end plates, embodies a vertical flange 220, guideway block 22I and stirrup 222. Loose in said guideway block is latch bolt 223. Thin elongated cross bar 224 which is passed between tines of the fork (unfinished, its tines at their terminal portions being bridged by the usual web as indicated in Figure 27) one or the other of the said latch bolts 223 having been shifted to the broken line positions (see Figure 24), is disposed in position with its ends in the said stirrups 222 and against the flanges 220. The latch bolts are then s eed of 'movement of the cross beam 65). designates a. four-way pilot operating control returned to lowered position the. ends. of same making the said cross bar. 224 secure in its position and as it. appears in Figure 24.

Whereas in the rackstructure just described, the workholding element consists simply of a thin elongated cross bar, it will be understood that for the holding of articles as spoons .or the. like, a workholding structure: of modifiedi form, as indicated in Figures 28 and 29'isusedv To cause a varying of the distance between the opposed buffs in accordancev with the variation of the distance between the opposed edges. of the work carried by the saidrack we provide on the bottom of each of the slides 204-2124 (see Figures 13 and 14) a templet 225 with profile which is similar to the profile of said work. The said templet and which embodies a slide bar 225a is capable of being secured in precisely adjusted position on said slide with relation to the work, as by screw 2.28 carried by said slide bar and which is. passed through head 284a of the .of the work, may exert a steady pressure against the work, the set screws I53'-I58 in the lugs of levers I59 and I55. respectively are adjusted so that there is a slight space I59 between the ends of said set screws and the pins I30 of the buff carriages.

Air cylinders Wand X pivotallyconnected to the carriages I2I and I22 respectively (pipes therefor designated il3IlQ) portion thereof being flexible, have their piston rods connected by suitable pins to the lugs E65 of the levers I 60, as hereinbefore referred to.

Reference is now had to the elevational view of the machine as. in. Figure 4, and to the diagram of the hydraulic: system as in Figure 31. K designates a control. valve (for speed of movement of face plate 88). L designates a control valve (for M valve actuated by trips (see Figure 19) whereby the desired length of stroke of the beam through control valve P is had. Trip 23.3. (upper) causes the beam to start upwardly; Trip 234 (lower) causes said beam to start downwardly.v F designates a four-way piston type cam. actuated valve (controlled by pilot valve M) and with flexible pipe connections 85, 35 to cylinder 8 I. R, S and Q designate operator operable regulation. valves. designates'air controlled four-way val v-e which isinter-connected by pipe Ill" tothe compressed air system (see Figure 32) in which. said air system is hand control valve G, reducing valve ing therefor, are indicated in diagram FigureBB'.

The broken lines in Figure 33 indicatethe confines of the usual boxes 2:321), Ed t-b, Et'SbandZ-dfib '(see Figure 3) in which saidautomatic switches are contained; The said start buttons and said 8 stop buttons are indicated in Figure 1. The general wiring is carried in usual cables as in Figures. 3 and 41 and the line wires LI, L2, L3, are carried. in the usual cable (not shown) from source of current supply.

When G handle is moved from the neutral (Z) or closed position. (see Figure 8) to position I, the buifs are caused to be swungto remote positions indicated by the broken lines in Figure 8 where they rest- When G handle is moved from position I to position 2, the said buffs are caused to be swung from said remote positions, to proximal positions indicated by the solid lines in Figure 8, for work. At the same time, the cross beam ti and the face plate &8 will have been caused to be set in motion,

When G handle in then moved from position 2 back to position I, the buffs are caused to be moved to retracted or remote positions, the cross beam and face plate continuing in operation.

For describing a typical performance of my new machine an article, for example, an unfinished fork of conventional type and form as indicated at Figure 27 is shown. The contour templets 225 (see Figures 13, 14 and 15) each with profile identical with the side contours of the said article, are in'readiness, and same are secured as by cap screws 2 I6, to the slides 2M and 2 i4.

Valve Q is opened. Valve G is in closed status, its handle being in neutral or Z position, as in Figure 8.

In making ready for placing the machine in operation, the carriages are manually swung from the broken line or" remote positions (see Figure 8) to the solid line or proximal positions. Then by adjusting the screws I53l58 said carriages are set so that the distance between the buffs is in accord with the minimum of the various distances between the opposed edges of the work. Then by adjusting the screws 22!) (see Figure 15) the templets are set at precisely true positions.

The work rack, with its hanger bar 221% loaded with unfinished forks closely arranged in successive order, endto end of said bar, is then manually placed inposition with its pintles 2 i 9 in the hooks I I3 and IN of the carrier structure. By adjusting the screws its and lit of the fixture 138 the said rack is poised in parallelism with the buds, after which the set-screws IQl' are tightened, thereby securing the bracket Hi5 in its adins-ted position.

The length of the stroke and the speed of movement of thecross beam having been determined with regard to the contours of the work, adjustment of the trips and 23 are then made. Adjustment also is made at valve K in accordance with the desired speed of movement of the face plate 38'.

G handle, asihereinbefore stated, is at zero or neutral position. The cross beam is at an end of its stroke. Face plate 3% is at an end of its stroke.

Coincident with the rotating of the buffs, the vertically reciprocable movement of the cross beam, the transversely reciprocable movement of the carrier structure (including the face plate and carrier plate), the work rack and the work carried thereby, and with the travel of the templets, there is accomplished a follower action of the carriages while in. their proximate relation whereby there is a varying of the distance between the buifsin-conformity with the flowing contours of the opposedv edges of the work.

For obtaining themovements above referred to,

and for obtaining the coordination and control of Said movements we provide the combination and arrangement of parts, as follows:

Secured to one of the frame uprights, namely: upright 4! (see Figure 19) is the four-way pilot valve M (hydraulic, hereinbefore mentioned) for stroke of beam, with dogs MI and M2. Carried by said cross beam at its rear side is an upright bar 23l provided with vertical slot 232 in which are retained adjustable trips 233 and 234 that are n the path traversed by said dogs respectively.

Mounted on the deck 3| is the hydraulic valve F hereinbefore mentioned (see Figure 7) its piston actuated by a cam 235 driven by shaft 235 which is geared as by gear Wheels 231 and 238 to ratiomotor E, and which said valve F gives intermittent action of the face plate 88.

Secured at position underneath the said deck is electric motor C (see Figure its shaft coupled as at 240 to the shaft of oil pump D, the inlet pipe 2 of which said pump leads from the source of supply namely: oil tank 242 located in the lower portion of the machine frame. This pump supplie the energy for the entire hydraulic line. J designates a relief valve, balanced piston type, for controlling the pressure in the hydraulic circuit.

Operation Push at start button 245 (see Figure 33) energizes motor C and ratiomotor E. By action of the oil through vertical cylinder 5| and by-pass valve L the cross-beam is caused to move up and down; and the face plate 88, by valve F, is caused to move crosswise reciprocatively.

Now, upon moving handle of control valve G to position I (see Figure 8) and the consequent release of air pressure into lines I13 (see Figure 32) and to cylinders U and V, the carriages are caused to swing the buffs to and to maintain them in the working or proximal positions. Push at start button 243 energizes motors A and B and establishes the driving of the buffs in the confronting directions as indicated by the arrows in Figure 8. Motors A and B may be deenergized by a push of stop button 244. Motors C and E may be deenergized by push of stop button 246.

In the procedure of buffing, the action of carriages is had through the functioning of the levers I50I55.

Incident to the functioning of thesaid cross beam 6|, and the functioning of said face plate 88, the path followed by the work, namely: the quantity of articles carriedby the Work-rack, is elliptical, and the effect of the buffs upon said work is a brushing of the ware equally longitu-' dinally and also transversely of said ware. The refuse, which is incidental to said brushing, escapes downwardly and is passed through the space bounded by the wall plates [2 Il 22 and the cheek plates ll1l|8 of the carriages, and is emitted through discharge chute Hi5.

After the ware will have been caused to traverse the zone between the buffs during a period of about thirty seconds, the desired finish will have been imparted to the ware.

The operative then returns the handle of Valve G to neutral position whence through the action of the air through lines I13 and I'M and cylinders U and V the carriages are caused to swing to remote status and at rest, the driving of the buffs being not interrupted. The operative then removes the loaded work-rack and its finished ware simply by lifting said rack from the hooks of the carrier structure. In the meantime another Workwork.

rack loaded with unfinished ware is placed in connection with the carrier structure in the manner as hereinbefore described. G handle is then moved to position I whence the carriages are swung toward each other and the buffs brought to working position engaged with the work.

At any time during the procedure of buffing, regulation may be had by valve R to vary the speed of movement of the cross beam with relation to the character-and contour of the work. Also regulation may be had, by valve S, to vary the speed of the cross movement of the face plate with relation to the character and contour of the All moving parts of the machine are so coordinated that once the necessary adjustments are made to accommodate the ware to be handled, the operation of the machine proceeds without need of special attention and it performs its'functions automatically. The hood structures shown constitute protective and safety guards against personal injury, and same contribute to maintenance of :cleanliness. Suitable lubrication of all working parts is provided as by conventional means and not shown. At all times during operation of the machine the buffs are under such control that while the desired degree of bufling pressure, as indicated by air pressure guage TI is had, said pressure is cushioned by the reducing valve ,T, and 'at the same time the distance between the buffs is caused to vary in accordance with-the contours of the work which is being op-' erated upon.

Whereas, my new machine as it is herein illustrated and described constitutes a practical embodiment of my invention, it will be understood that I do not limit myself to the exact details of construction shown and explained since manifestly the same may be modified without departure from the spirit and principle of the invention as defined in the claims.

What I claim as my invention is:

l. A machine ofthe kind described comprising,

in combination, a frame, a cross beam supported connecting the cross beam and said slides, to

move said slides reciprocatively, and power transm'itting devices interacting between the cams and 'said carriages. Y

2. A machine of the kind described comprising, in combination, a frame, a cross beam supported by and vertically reciprocable on said frame, a carrier structure supported by and which is horizontally reciprocable on said beam, means to operate the beam, means to operate the carrier structure, a work-holding rack supported by the carrier structure, opposed carriages pivotally mounted in position below the carrier structure, and in parallelism with the rack, each carriage being equidistant from the perpendicular plane of said rack, buffs journaled for rotation on said carriages, means to drive the buffs, guideway structures, slides thereon, profile cams n secured to the slides, power transmitting devices interconnecting the cross beam and said slides,

'to move said slides reciprocatively,'-sa-id devices 'the free ends of saidlevers -'be'in'g engaged '"by said cams, and devices manually operable -to--adjust the distance between the carriages and'said levers.

A machine of the'kind descr ibed compr ising, in combination, a frame, a *crossb'eam $11131 ported by and vertically reciprocable on said frame, a carrier structure suppor ted by and which is horizontally rec'iprocable on 'said' beam, means to operate the beam, means to operate thecarrier structure, a work-holding rack supported by the Carrier structure, opposed 'carriages piv- 'o'tally mounted in position :below {the :carrier structure and in "parallelism witl'iithe track, each carriage being equidistant from the 'perpendicular plane of said rack, buffs jOUIYIIaIIGdDfOr rotation on said carriages, means to drive the ibuffs,

guideway structures, slides there'on, pro'fi1eircams secured to the slides, power transmitting devices interconnecting the cross beam "and said slides, to move said slides recipro'catively, :said

devicesincluding a rack-rod'rdirected downwardly from each end portion of th'e cross beam, two

"pairs of pinions journaled onbearingsfsupported by the frame, each of said mack-rods being in mesh'with 'a pinion :of .each of said :pairs, power transmitting devices interacting between the cams and said carriages, :sai'd devices including rack-bars connected With'iSa-id'S1idES,:Ea,hTOTISaid rack-bars being inmesh with the :other fpinion of each of said :pairs, follower levers :fulcrumed adjacent toand movabletowengagement'with said .carriages, the free ends of said levers being engaged by saidcams, and-devices --manual1y -operable to adjust-the distance betweenthe carriages and said levers, means aperable to :control the carriages in the interim during :their -movement through said distance.

4. A vertical'finishingmachine comprising in combination, an upright frame, a ,cross :beam supported byzand which is vertically reciprocable 'on said" frame, "a work-carrier structure :mounted on said beam and which is transversely reciprocable thereon, means to move the cross beam, .means .to control the speed of moVementofIsa-id beam,

.means to limit thelength-ofstroke of said beam,

means to regulate the beammoving means,-means to move the carrier, means to control thespeed of-the carrier mover means, means to regulate the carriermover means, opposed carriagesmounted in position below said carrier structure, buiTs journaled on the carriages, "means to drive the bull's 'in confronting directions, guideway struc- "tures mounted on the frame, a profile templet cam -'s1idable in each :gui'deway structure, power transmitting connections between the cams'and the said cross beam, and follower'members interengaged with the carriages'to move same, said follower members'being engaged with said cams.

5. A vertical finishing machine consisting of a frame embodying ar=standard,'azcross beam slidable vertically on said standard, =aa'face'plate slidably and horizontally retained on said :beam,

means to reciprocate the beam, means "to reciprocate the face plate, :a :icarrier "plate connected to the faceplate and adapted ;to be set in and held at adjusted position .vertically thereon, suspensory devicesxprojectedo from :the carrier plate, anelongated zworkera'ck iremovably attached to said suspensor devices, carriages arranged in ,par-

allel opposed relation :and equidistant from the vertical plane of said suspensor devices, a buff mounted for'rotationon each carriage, means to rotate the buffs, :a lever with its weight arm engageable by but spaced 3, short distance from each carriage, saidlevers being operable to move said carriages towardeach other through said short distance and the carriages being capable of retreatingdevices to predetermine the said short distance, .said devices interacting between'the :carriages and said levers to ,perm'it'the retreat of said carriage within the range of said-short distance, guideways, slides therein, power transmitting devices interconnecting the cross beam and said slides .tomove said slides reciprocatively and in opposed directions profile cams carried Ibysaid slides, said camsbeing engageable bythe free ends of the levers, devices interacting between .said levers and said carriages to permit yield of the carriages retractively, means to regulatethe degree of said yieldymeans to determine .the length of stroke of'said beam, means to Vary the length of stroke of the face plate, and means to drivethebufis.

'WARREN G. HELDENBRAND'.

REFERENCES CITED The iollowing references are of record in the file of this ,patent:

UNITED STATES PATENTS Number Name Date 77,646 'Norton -May 5,1868 97,664 Marsh Dec. "7,1869

7 1,440,386 .Hawes Jan..-2, 1923 1,966,869 'Owen July 1'7, 1934 2,269,311 Johnson Jan. 6, 1942 2,276,059 Moon .Mar. 10,1942 2,452,863 Nicholas -Nov.. 2 ,1948

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