US1548105A - Polishing machine - Google Patents

Description

' DERBERG POLISHING MACHINE Filed July 5. 1925 2 Sheefcs-Shut 1 M ,filwzurba; I gi aaw Aug. 4, 1925. 1,548,105

I J SQDERBERG N 7' POLISHING MACHINE A Filed July 5, 1923 2 Sheets-Sheet 2 INVENTOR Patented Aug. 4, 1925.

v UNITED STATES 1,548,195 PATENT OFFICE.

JACOB. SODER-BERG, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOE TO PITTSBURGH PLATE GLASS COMPANY, A CORPORATION OF PENNSYLVANIA.

POLISHING MACETNE.

Application filed July 5,

To all whom it may concem:

Be ,it known that I, ,JAoon Sonnnnnne, a

in Polishing Machines,-of which the following is a specification.

The invention relates to polishing machines for use in polishing plate glass and particularly-to the runner construction. It has for its principal objects; the provision of an improved mounting for the runner whereby it may move freely up and down with a minimum amount of wear in the moving parts and with no tendency of the parts to bend and hold the face of the runner at an angle to the plane of the glass as is the case with the ordinary runner spindle which slides through the runner frame; the provision of a construction which permits the ready lifting and tilting of the runner to .bring its face in position for cleaning without detachin the runner from the runner frame; and t e rovision of a construction rmits o the utilization of the centrifugal force, incident to the rotation of the runner frame, to regulatethe pressure which; the runner applies to the table. Certain embodiments of the invention are illustrated in the accompanying drawings wherein:

Figure 1 is a side elevation partially in section showing the assembled apparatus.

36- Fig. 2 is a detail side-elevation view on an enlarged scale showing the mountmg of one of the runners. Fig. 3 is a plan view of the construction shown in Fig. 2. And Figs. 4

' and 5 are views of a modification similar to those of Figs. 1 and 2.

Referring to the general arrangement of Fig. 1, the reference numeral 1 indicates the usual revolving polishing table to the upper surface of which is secured the glass 2 which is to be polished. Mounted in suitable bearings 3 and 4. on the cross beam 5 constituting a portion of the framework of the machine is the runner spindle 6. The runner spindle is adjustedand held at the desired vertical position by means of the lever 7 fulcrumed at 8 upon the bracket 9 carried by the frame member 10, and is provided at its inner end with a fork 11 which fits around the thrust bearing member 12. The member 12 engages a second thrust bearing member 13 which is 1923. Serial in. 049,723.

pinned to the upper end of the spindle 6.

To the outer end of the lever 7 is secured the threaded adjusting rod 14 which extends through the pivoted bracket member 15 carried upon'the lower side of the beam 10 and through the threaded hub portion of the hand wheel 16, thus providing means whereby the runner spindle and parts carried thereby may be raised and lowered.

Mounted upon the lower tapered'end of the spindle is the runner frame 17 which is in the form of a disc carrying at its periphery the plurality of runners 18. These runners are in the form of metal blocks to the lower sides of which are secured the felts 19. The upper sides of the blocks are socketed to receive the ball heads 20 of the spindles 21, such ball heads being held in their sockets b means of the plates 22 held by the stud bo ts 23. This permits the runner blocks to adjust themselves'so. that they present their lower surfaces in parallel relationwith the glass and also permits the blocks-to rotate with respect to the spindles. The spindles are connected to the runner frame 17 by means of the pairs of links 24 and 25 pivoted to the frame by the pins 26 and 27 and to the spindles by the pins 28 as indicated in F ig. 3. v

The foregoing arrangement permits the runners to move freely up and down and at the same time maintains the spindles in vertical position regardless of the position of the runners. This involves an improve ment over the common method heretofore employed in which the spindles were slidably mounted in vertical perforations in the runner frame and in which the centrifugal force applied to the runners and incident to the rotation of the runner frame tended to impose a binding strain upon the spindles and thus restrict their freedom of movement up and down. Under these conditions with the .the present construction, this difliculty is entirely overcome and the spindles are as free to move vertically after long service as when first installed. The constructlon also and 29, the ends of the links being forked a in the end of the means might be employed permits of an adjustment or regulation as to the amount of pressure which the runners impose on the glass so that their polishing effect may be increased or decreased as conditions require. This adjustment is secured by raising and lowering the runner frame 17. When the runner frame is lowered from the position illustrated, the centrifugal force incident to the rotation of the runner causes the runners to press downwardly so that the polishin efi'ect .noident to their weight is increase On the other hand, if it. is desired to decrease the polishing effect of the runners, this may be accomplished by raisi g the runner frame from theposition s iown, so that the centrifugal force tends to lift the runners from the glass, thus decreasing their pressure thereon. This regulation is secured without any tilting of so that the pressure exercised throughout the areas of the runners is uniform and is not concentrated at one side or the other.

In order to limit the up and down'movement of the spindles, the surfaces are provided on the runner frame in position to engage the surfaces of the links after the spindles have moved up or down a certain distance.

When it is desired to expose the lower surface of a runner block in order to clean the felt or in order to replace the felt by a new one. the spindle may "be tilted to the dotted line position indicated in Fig. 1 by removing the pin 26 at the inner end of the link 24 and swinging the parts upward, after which the spindle may be secured in its inclined pos1- tion. inserting a bolt through the lug 31 on the frame and through the perforations link 24. Various other for holding the tile in this inclined position, but the one tratcd is preferred. because of its sim- L flhis feature which permits of the a the s indle to inclined position, rly vantageous when. the run 111 connection with a straightaway olishing les carrying the glass to be polished are moved beneath a series of polishing runners. Under these conditions and with the polishing operation a. continuous one rather than. an intermittent one, it becomes desirable to clean the olishers one by one without interrupting the continuous operation, and without the application of water to the table to clean the felts, and without the removal of the tables from beneath the runners to give access to the felts. The present arrangement permits of the removal of the rallied rouge from the felts without interas a pan may be.

faring with the operation, inserted beneath the runner after it is t lted to inclined position and the felt scraped and washed without interfering with the o era tion of the other polishing machines and the runners operation in which a series of tawithout applying water to the table, itself, such as would diminish the efficiency of the polishing action of the other machines of the series. The regulation of the pressure between the runners and the table may also be varied between ggeater limits in the straightaway operation in which the spindle is positively driven than is the case in the standard operation such as illustrated in which the table is rotated and the rotation of the runner frame is caused by the contact between the runners and the rotating table. It will, therefore, be 'understood that the invention contemplates the application of the link mounting of the runner spindles either to an arrangement in which the runner frame is positively rotated or in which it merely acts as an idler.

Figs. 4 and 5 illustrate a modification-in which the runner frame is driven sitively by a motor, the operation invo ving, the straightaway one heretofore referred to in which the glass is carried beneath a series of polishing runners by means of tables ounted upon a. track. This modification also shows a different method of mounting the runner spindle. In this construction, 32 is the framework; 33 is the runner frame; 34 is one of the series of tables carrying the glass moved ahead. by the gear 35 engaging racks 36 on the bottoms of the tables; 37 is a bearing member carrying the drive spindle 38; 39 is a motor for driving the spindle 38 through the intermediary of reducing gearing in the casing 40; 41 is a lever for supporting the weight of the polishing unit engaging trunnions 42 projecting from the gear casing; 43 is a link pivoted to the frame and engaging other trunnions 44 carried by the member 37; and 45 is a, rod pivoted to the end of the lever 41 and corresponding in function 1, said rod being adjustable vertically by means of the hand wheel 46 to adjust the vertical position of the runner frame.

The runners 47 are connected to the spindles 48 by ball joints 49 similar to those of Fig. 2, but the method of mounting the spindle is different. In this construction, the spindle is mounted to rotate in a pair of bearings 50 and 51, collars 52 which are pinned to the spindle. The links 53 and54 which are forked at their ends as in the other construction are pivoted at their outer ends to the bearings 50 and 51 by means of the stud bolts 55 which links 53 and 54 are pivoted to the frame 33 by the bolts 56 as in the other form of construction. This arrangement relieves the ball connection 49 of a considerable portion of the wear to which it is subject in the other form of construction, since the spindle is free to turn in the bearings 50 and 51. The ioint at the ball connection to the rod 14 of Fig.

held between pairs of quired.

therefore, does not wear loose as rapidly and fewer amusements and replacements are re What l'cleixn is: I I 1. In combination in a machine for polisliing glass, a runner frame, a plurality oipolishing runners having vertical spindles, and parallel link motion connections lietween theframe and spindles for maintaining the spindles in vertical position during their up and down movements with respect to the frame.

2. In combination in a macliinefor polishing glass, a runner frame, a plurality of polishing runners having vertical spindles, pairs of arallel links each connected. at one end to t e frame and at the other to the spindle and arranged one above the other, and means whereby the connections between the lower links and the frame maybe released topermit the spindles to be swung outwardly to inclined position to expose the lower surfaces of the runners for cleaning or repair.

3. In combination m a machine for polishing glass, a runner frame, a plurality of snares polishing runners having vertical spindles, pairs of parallel links each connected at one end to the frame and at'the other to the spindle and arranged one above the other, means whereby the connections between the lower links and the frame at their inner ends may be released to permit the spindles to be swung outwardl to inclined tical position during their up and down movements with respect to the frame.

In testimony whereof, I have hereunto subscribed my name this 30th day, of June, 1923.

JACQB SODERBERG

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