US2458708A - Polishing and glazing machine - Google Patents

Description

Jan. 11, 1949. c. o. JOHNSON ET AL POLISHING AND GLAZING MACHINE- 5 Sheets-Sheet 1 Filed Nc av. 6, 1947 .5 g &

@Q Q 3 &

' INVENTORS I Car/ 0 Johnson and 7 BY W/'///am C. 5am WM @h Q ATTORNEYS Jan. 11, 1949.

C. O. JOHNSON ET AL POLISHING AND GLAZING MACHINE 5 Sheets-Sheet 2 Filed Nov. 6, 1947 m N ma Q3 QN QQWM QQ INVENTORS Car/ 0. Job/7:00 and BY W/W/am C. Bari Qua/ W M @244 ATTORNEYS c. o. JOHNSON ET AL 2,458,708

POLISHI NG AND GLAZING MACHINE Jan. 11, 1949.

5 Shee't-Sheet 3 Filed Nov. 6, 1947 INVENTORS Carl 0. Job/7500 and BY W////'0/72 C. Burt @3444, @0144 M7 ATTORNEYS Jan. 11, 1949. c. o. JOHNSON ETAL 2,458,708

POLISHING AND GLAZING MAQHINE Filed NOV. 6, 1947 5 Sheets-Sheet 4 I "/23 i .42; i 20 f7 5. z u L1 INVENTORJ' mg Carl 0. Job/7500 and BY C. Burt ATTORNEYS Jan. 11, 1949. c. o. JOHNSON ET AL POLISHING AND GLAZING MA HINE 5 Sheets-Sheet 5 Filed Nov. 6, 1947 BY W/W/a/n C Burt @m M M v ATTORNEYS Patented Jan. 11, 1949 POLISHING AND GLAZIN G MACHINE Carl 0. Johnson, Springville, and William C. Burt, Olean, N. Y., assignors to Clair Manufacturing Company, Inc., Olean, N. Y

Application November 6, 1947, Serial No. 784,410

'7 Claims.

This invention relates to improvements in polishing and glazing machines, and more particularly to machines for simultaneously polishing multiple lots of curved or bowl type articles such as spoons or forks. Furthermore, the present invention relates to improvements in the general type of machines disclosed in Patent No. 2,188,223 issued January 23, 1940 to C. 0. Johnson for Buffing and polishing machines, and in Patent No. 2,269,311 issued January 6, 1942 to C. 0. Johnson for Abrading machine; and embodies improvements in the art thereover whereby such machines are particularly adapted for glazing and polishing of tableware of the spoon and fork types, and other variously shaped articles.

One ofthe objects of the invention is to provide an improved machine for polishing and t glazing tableware of the spoon and fork types.

Another object of the'invention is to provide an improved machine for the purpose aforesaid, which machine embodies specifically improved Work piece mounting meansfacilitating loading and unloading of the machine. Another object of the invention is to provide an improved ma chine for the purposes aforesaid, embodying improved work piece mounting and feeding means, whereby the Work pieces are presented to the polishing or glazing rolls in improved manner. Another object of the invention is to provide an improved machine for the purposes aforesaid, embodying improved polishing and glazing roll control means, facilitating loading and unloading of the machine. Other objects and advantages of the invention will appear in the specification hereinafter.

In the drawings:

Fig. 1 is a top plan View of a polishing or glazing machine constructed in accordance with the invention;

Fig. 2 is a front elevational view showing the polishing or glazing rolls;

Fig. 3 is a fragmentary sectional view taken along line III-III of Fig. 1;

Fig. 4 is a sectional detail taken along line IV-IV of Fig. 3;

Fig. 5 is a fragmentary section taken along line V-V of Fig. 1;

Fig. 6 is a fragmentary diagrammatic View, on a larger scale, similar to Fig. 3i and showing the method of feeding the work pieces to the rolls;

Fig. 7 is a fragmentary front elevational View of the improved work piece carriage portion of the machine;

2,188,223 referred to hereinabove; that is, the

present invention embodies an operative mechanism Which is mounted upon the basic machine as an accessory thereto so as to adapt the latter specifically to the purpose of polishing or glazing knives and forks or other variously shaped articles. As illustrated in Figs. 1-2 for example,

. the basic machine includes a. base or frame l0 supported by legs l2 to a convenient height; frame l0 in turn supporting the oscillating work piece carriage and the polishing or glazing rolls, and other mechanisms for driving and controlling the carriage and the rolls :as Will be explained hereinafter.

The rolls are indicated at l4-I6; the roll l4 being mounted above the roll it and with its axis of rotation set slightly ahead of the axis of the roll IS. The roll [4 is of substantially less diameter than the roll l6, and the rolls are arranged to contact along the line of entering of the ware to be polished or glazed. The rolls l4-l6 will of course be formed of any suitable material treated in any desired manner according to the character of the work to be done, and the roll 14 is carried upon a shaft [8 while the roll [6 is carried upon a shaft IS.

The shaft i8 is journalled at its opposite ends upon rocker arms 20-22 which extend from opposite ends of a common rocker shaft 24; the shaft 24 being in turn rotatably supported by means of pedestals 26-28 which extend vertically from opposite ends of the base plate l0. A second rocker shaft 30 is similarly journalled upon the'pedestals 26-28 so as to extend parallel to the rocker shaft 24 and therebelow. Rocker arms 32-34 extend forwardly from the rocker shaft 30 in parallel relation and carry at their outer ends the lower roll shaft l9 in journalled relation thereon. At one end of the machine the rocker shafts 24-30 are interconnected by means of meshing gears 36-38 which are keyed to the rocker shafts 24-30, respectively. Adjacent the opposite ends of the rocker shafts 24-30 they are fitted with rearwardly extending crank a-rms 40-42. The arm 40 carries a screw block 44, and the arm 42 carries a vertically spl-ined stirrup 46 thereon. A hydraulic cylinder member 48 is fixed to the lower end of the stirrup 45 and slidably mounts therein a piston 56. The piston 553. is fixed upon the lower end of a screw 52 which extends upwardly through the open end of the cylinder i8 and thence through the cievis end portion of the crank arm 22 and thence through the nut il i which it engages in screwthread relation. At its upper end, the screw 52 carries a hand Wheel 1.55. A pair of tension springs 58 s are connected at their upper ends to opposite sides of the screw block it and at. their lower ends upon hooks 5455-59 which are fixed to the slide bracket 46. Thus, it will :beaappreciated that the springs 5853 tcndto bias the crank ar us i% i2 so as to opentherollsM-Id,

but that the piston cylinder unit ili iiil is oper able to force the rocker cranks apart so as to bring the rolls i i-it together for polishing work pieces inserted therebetween. Also, it will beaD- preciated that the handwheel 55 is manually adjustable for purposes of regulating the tension and -.idistance between the rolls under operating conditions, so as to suit the machine to diiierent classesoi work.

The rolls i4I6 are arranged to be driven by separate electric =motors, and 'as illustrated in Figs. l2, this is accomplished by 'mounting a motor to upon the rocker-bracket 22 and coupling the motor shaft- E2 to the roll shaft I3 by'means of a coupling iii. Likewise a motor 85 is mounted uponthe rocker bracket 34, and the motor shaft-:fifiiscoupledto the roll shaft It as indicated atflfii (Fig. 2)

The work mounting carriage portion of the machine is illustrated herein to comprise 'a' table Iii which is mountedupon-the base plate'iii by means 'of slideways 32 so that the "table it is reciprocable "horizontally in directions transverse to therrolls I 4- I6. "A hydraulic pistoncylinder unit is mounted under thebase plate It, and the piston rod i6 thereof extends in the direction of platform travel and into. connection with a bracket "'I I carried by the platform i0. Thus, hydraulic actuation of the piston-cylinder unit 15 will cause'the-platform'iil to reciprocate toward' and away from the rolls i l-I 5.

A second'platformcil carrying an elevated rail 8! is mountedbymeans of"ro'l'lers'82"32 (Fig???) which are carried by' an upright extension of the platforml ii 'so that'the platform Si} is reciprocablerelative to *theplatform 'Iii in directions axially-of the=rollsI4I6 independently of reciprocation'of theplatform "It. Ahydrauliopiston-cylinder unitiii'is mounted'upon the platform lfi and'thepiston"rodid l-"thereof is connected at *85 to the platform 3%, whereby hydraulic actuation of the piston cylinder unit'S'S will cause the platform 81] to reciprocate in sidewise directions independently of'backward and forward 'reciprocations of the platform "Iii.

The platformrsfi includes uprights 'dii dfiand on one end aside plate 87 which is bolted thereto by bolts 88- 88. The uprights SE86 mount top rails EEG-.490 which extend forwardly of the brackets 86 and-mount in journalled relation thereon :a. rocker shaft 92 which-extends parallel to :therolls ZME5. 'At one-end ofthe-rocker shaft'fizit'carries .a quadrant-9 which in turn mounts. a crankpin $3. The piston rocl- 98- of a hydraulic cylinder-pistonunit-Hill is connected to. the crank pin 8i; the closed endof the cylinder "Bil being ,1 pivotally mountedupon the bracket platetlasby means-of apin Iili (Fig.3). The quadrant-:94 isarcuately slotted-as indicated at I E32 concentricallyiof its: mounting shaft '92, and a trip pin mir-isiadjustably disposed in the slotted portion I02. A second trip pin IE6 is also disposed in the groove I92 adjacent the lower end thereof, and the pins III4IIJ6 are positionally adjusted on the quadrant 94 so that as the quadrant oscillates in response to an operation which will be explained hereinafter, the pins Id4IIl6 alternately contact the..actuating .arm IES of a four-way hydraulic pilot .control valve I ill, for actuating the latter.

The arms 9IJ90 also mount short rocker shafts iI2-I I2 (Figs. 6-7) and the rocker shafts II'2 are connected to the cross shaft 92 by means of meshinglgears IM-IIE. Each rocker shaft "H2 carries aibracket H3, and thus it will be appreciatedthat whenever the hydraulic piston cylinder unit [Oil operates to reciprocate the quadrantil lpthe-rocker shaft and gear mechof the control valve :I.30.

anismwill operate to simultaneously cause the brackets II8I I8 to :rock upon the shafts II2.I I2.

The brackets I I 8.I I 8 are grooved as indicated atIZO toreceive in slide-fitting relation therein the oppositepin-shape'd ends I 23 of .a work carryingplate I24, 'so'thatthelatter may'be slipped through the vgroovesI'ZIl until-the pin ends I23 run into the bottom. ends otthegrooves. Thus, agang .ofspoons or Zforks or lthe -like-maybe clamped upon theplatel2'4, as by nreans of a detachable holder bar I26, so thatithework pieces are mounted to extendtherefrom toward the bumng rolls. 'As'shoWnin Fig.1), the rolls. I4--I6 rotate in'such "direction as to atiall times tend to draw the-workpieces"into'the polishing gap.

As illustrated diagrammatically in Fig. 6, the quadrant 94 an-dthe"brackets I'I8'-I I8 and the operating mechanisms therefor are so constructed and arranged as to cause the-workpiece holdingmembers to swing aboutthe-axes of the shafts II2I IZ between't-hesolid line andthe broken line positions thereof incidental to which the I work pieces are causedto oscillate "between the solid line'and the broken line positions thereof. 'Thus, itwv-ill be understoodthat the curved orbowl portions of the work pieces will 'bethereby caused to pass inandout between the rolls soas. to provide progressive polishing or glazing of I the curvedbowl portions-from the tip ends to the: heel ends thereof and that'the unique movements-"oi thebr'ackets I-I-8I I8=and the pivoting of 'the work -holde'r plate thereon permits the curved .=surfaces rof i.l h'e-= \VOI'k pieces -to move in intimate polishing contact/with the rolls through outall. phases of displacement.

Fig. .9 illustrates diagrammatically the power control system ;.of :the ;machine, whereby whenever a load of work pieces is clamped -uponthe rack I24 the attendant may start-'the machine to I operate by simply throwing (the ;han'd1e.of a manual control-valve designated I30. .The valve I30 controls the bypassing of hydrauliclfiuid from a hydraulic; pump I32 -..thro.ugh a .a pressure conduit I34 and an oil return: conduitifie which leads to the fluidareservoir. Thus,'whenever .the valve I 30 is open the pressure. fluid :merely: circulates through v the iby-pass .asystem. -.Conduits I38I39 leading from opposite ends-.ofthero'll pressure :control (cylinder 48 wconnect in .turn through the oil bypass system at opposite sides Thus, -whenever the control valve. L30 ,is-open the pressure is-equalized at opposite sides of theroll control piston, whereby the. springs 58-'.-58 .are,permitted tohold the rolls I I-16in openposition. H

However, upon closing of the control-valve I30 by the operator, the pressure in the conduits I3Gl39 falls oif, thus enabling the pressure in the conduit I38 to displace the piston rod 52 so as to bring the rolls'together into polishing relation. Also, when the valve; 1.3:! 1, is: closed the pump pressure which previouslydissipated through the bypass system is applied to the previously described carriage reciprocation cylinders 75-83-400 through means of corresponding conduits MlL-ME-I i l which lead to" corresponding four-way controlvalves l45|46|47. The valves l 55l48'-|4l are in turn each controlled by four-way pilot valves i50I52-- H0. The pilot valves are fed by pressure lines leading from the pressure conduits of the system and are so arranged that as the carriages le-8ll-l l8 reciprocate as explained hereinabove the pilot valve triggers are thrown in alternately reversed directions by contacting abutments extending from the corresponding moving carriages, so that the valves 5-446- M'! are thereby actuated to deliver power to the cylinders l583-l00 for maintaining the carriage reciprocation motions so long as the manual control valve remains closed. Thus, upon completion of a polishing or glazing operation, the attendant merely opens the valve I38 whereupon power to the reciprocating carriages is discontinued. Also, immediately upon such opening of the valve I30 the piston 52 is released so that the springs 58-58 are permitted to open the rolls l4|6 before the carriages perceptively slow down and thus undersirable grooving of the polished ware is avoided, such as would otherwise occur if the ware were permitted to lie between the rotating rolls without being simultaneously oscillated laterally.

What is claimed is:

1. In a polishing and glazing machine, a pair of rolls, means to drive the rolls, a slide member movable towards and away from the rolls in a line at right angles to the longitudinal axes of the rolls, a platform carried by said slide member and movable thereon in directions parallel to said rolls, a work holder carried by said platform by means of pivotal connections therewith having pivot axes parallel to said rolls, means for causing said slide member and said platform to independently oscillate, and means to cause the work holder to pivot relative to said platform, said work holder being constructed and arranged so as to support a plurality of work pieces to extend forwardly therefrom for passage between said rolls for polishing or glazing purposes, said work holder pivot connections being arranged to cause said work pieces to reciprocate forwardly and rearwardly relative to said rolls incidental to pivoting of said work holder.

2. In a polishing and glazing machine, a pair of rolls, means to drive the rolls, a platform carried by said machine and movable thereon in direction parallel to said rolls, a work holder carried by said platform by means of pivotal connections therewith having pivot axes parallel to said rolls, means for causing said platform to oscillate, and means to cause the work holder to pivot relative to said platform, said work holder being constructed and arranged so as to support a plurality of work pieces to extend forwardly therefrom for passage between said rolls for polishing or glazing purposes, said work holder pivot connections being arranged to cause said work pieces to reciprocate forwardly and rearwardly relative to said rolls incidental to pivoting of said work holder.

3. In a polishing and glazing machine, a pair of rolls, means to drive the rolls, a slide memberwork-holder being carried by means of pivotal connections upon said slide member, hydraulic means mounted uponsaid slide member and operatively associated therewith and with said work holder for vertically pivoting said holder whereby said holder is moved through a curvilineal path,

said hydraulic means comprising a two-way piston-cylinder device and a pair of control valves,

therefor, said control valves comprising a reversing fluid pressure operable-valve member and a pilot fluid valve therefor and means connected with the pilot-valveand responsive to the work holder movement for operating the pilot valve in response to the reciprocating movement controlled thereby.

4. In a polishing and glazing machine for finishing curved surface work pieces, a pair of parallel rolls, means to drive the rolls, a work holder adapted to mount a plurality of work pieces with the curved surface portions thereof extended toward the gap between said rolls, said holder being carried by said machine by means of pivotal connections therewith whereby upon pivoting of said work holder the extended work pieces are displaced to reciprocate in directions transversely of the polishing gap between the rolls and at the same time oscillated so that the work piece curved surfaces float peripherally of one of said rolls.

5. In a polishing and glazing machine for finishing curved surface work pieces, a pair of parallel rolls, spring means normally holding said rolls apart, means to drive the rolls, a work holder adapted to mount a plurality of work pieces with the curved surface portions thereof extended toward the gap between said rolls, said holder being carried by said machine by means of pivotal connections therewith whereby upon pivoting of said work holder the extended work pieces are displaced to reciprocate in directions transversely of the polishing gap between the rolls and at the same time oscillated so that the work piece curved surfaces float in peripherally bearing relation against one of the said rolls, power means operable to pivot said work holder, second power means operable to force said rolls together against the action of said spring means into polishing cooperation, and a single control means adjustable either to simultaneously cause said rolls to close and said holder to pivot or to cause said rolls to open and said holder to stop pivoting.

6. In a polishing and glazing machine for finishing curved surface work pieces, a pair of parallel rolls, means to drive the rolls, a work holder frame having slideways therein, a work holder adapted to mount a plurality of work pieces with the curved surface portions thereof extended into the gap between said rolls When said holder is slip-fitted into mounted position upon said frame, said frame being carried by said machine by means of pivotal connections therewith and said holder being pivoted to said frame whereby upon pivoting of the parts the extended work pieces are free to float in directions transversely of the polishing gap between the rolls and at the same time in a curved path peripherally of one of the said rolls.

7. In a polishing and buffing machine, a pair of bufling and polishing rolls, means to drive the rolls, a slide member movable towards and away from the rolls in a line at right angles to the longitudinal axes of the rolls, a. platform movable upon said slide member-in directions parallel to the rolls, a work holder carried by said platform by means of pivotal connections therewith, and independently operating hydraulic power means for reciprocating said slide member and for reciprocating said platform and for independently pivoting said work holder, said hydraulic means comprising independent reversible pistoncylinder devices and independent control means therefor, said control means each comprising a fluid pressure operable valve member and a pilot fluid valve therefor and in each case means connected with the pilot-valve and the moving memberfor operating the pilot valve in response to the reciprocating movement controlled thereby.

CARL O. JOHNSON.

WILLIAM C. BURT.

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

UNITED STATES PATENTS Number Name Date 327,934 Frech Oct. 6, 1885 2,077,359 Flygare Apr. l3, 1937 FOREIGN PATENTS Number Country Date 238,308 Great Britain Aug. 19, 1929

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