US2003504A - Grinding and polishing machine - Google Patents

Description

June 4, 1935. c. B. GARWQOD 2,003,504

GRINDING AND POLISHING MACHINE Filed June 25,. 1932 2 Sheets-Sheet l m A Q N 1 q I a: LhafllesHGaPu/ood 3 H a:

June 4, 1935- B, GARWOOD 2,003,504

GRINDING AND POLISHING MACHINE Filed June 25 1952 2 Sheets-Sheet 2 sq N Patented June 4, 1935 PATENT OFFICE GRINDING AND POLISHING MACHINE Charles B. Garwood, Linthicum Heights, Md., as-

1siigilnor to Carr-Lowrey Glass 00., Baltimore,

Application June 25, 1932, Serial No. 619,325

4 Claims.

This invention relates to a machine designed primarily for use in grinding and polishing articles such as glass bottle stoppers and the like.

It is an object of the present invention to provide a holder for supporting articles of any size desired and for maintaining them in contact with the grinding or polishing element, the holder being provided with a means for simultaneously rotating and reciprocating the articles being treated, thereby to dress the articles uniformly and avoid undesirable channeling or-scarring of the grinding element.

A further object is to permit quick changing of the articles being treated and to provide a means whereby the holders for said articles can be shifted readily and held in retracted position, if desired. V

A still further object is to provide simple and efficient mechanism for rotating and reciprocating the holders.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes may be made in the precise embodiment of the invention herein disclosed within the scope of what is claimed without departing from the spirit of the invention.

In the accompanying drawings the preferred form of the invention has been shown.

In said drawings:

Figure 1 is a rear elevation of the apparatus, the position of the grinding and polishing elements relative to the articles being treated being indicated by broken lines.

Figure 2 is an end elevation of the apparatus viewed from the right in Figure 1.

Figure 3 is a section on line 3-3, Figure 1, one of the positions of the holder being indicated by broken lines.

Figure 4 is an enlarged section through one of the holders, a portion of its supporting spindle being shown adjusted thereto.

Figure 5 is a section showing a portion of the speed reducing gear.

Referring to the figures by characters of reference, I designates a base on which is mounted a motor 2 the shaft 3 of which has a small gear 4 adapted to drive a large gear 5. This latter gear has a tubular shaft 6 mounted for rotation in a bearing 1 and said shaft is slotted longitudinally, as shown at 8.

Suitably disposed bearings 9 are provided for a shaft I mounted to slide and rotate therein and one end of this shaft, which can be enlarged as shown at I I, is slidable in tubular shaft 6 and has a pin I2 or the like'slidable in the slot 8. Thus the two shafts 6 and IE) rotate together, the shaft I0 however, being slidable relative to shaft 6.

A collar I3 is secured to the shaft I0 and receives thrust froma spring I4. A lever I5, which is fulcrumed at I 6, is operatively connected to collar l3 in any preferred manner, as indicated for example at IT, and the free end of this lever can 10 be provided with a roller I8 for engagement with the periphery of a cam I9.

Secured to the shaft I0 so as to slide therewith is a series of housings 20 each of which has an upwardly extending spindle 2 I journaled there in. A gear 22 is secured to the spindle within housing and meshes with a worm 23 in said housing secured to shaft I0.

Each housing has an upwardly extending finger 24 and a depending flat blade 25. Each blade is 20 connected byan adjustable spring 26 to a plate 21 upstanding from base I and slidably in this plate are rods 28 one of which is provided for each blade 25. Each rod is guided inan angular strip 29 on the base I so as to be held against displacement and a stop pin 30 is carried by each rod for preventing Withdrawal of the rod fro the guide plate 21. y f

The upper end of each spindle 2| is adapted to be detachably engaged by a holder 3| having a 3 socket 32 in its upper end for the reception of a glass stopper S or the like to be treated The holder can be detachably joined to the spindle in any manner desired. For example, the spindle can be provided with a tapered end 33 which can 35 be of any desired contour and the holder can be formed with a socket 32 for receiving said end. It is essential that the holder move with the spindle and at the same time be readily removable therefrom.

Shaft II! is slidable within but rotates with a sleeve 34 provided with a gear 35. This gear, which is held against sliding movement by any suitable means, constantly meshes with a gear 36 secured to shaft 31 which is journaled in a housing 38. This housing contains worm reduction gearing, indicated generally at 39, for transmitting motion to a shaft 40. Said shaft, in turn, through worm gearing 4| drives a shaft 42 at reduced speed, this shaft constituting the support for the cam IS.

The springs 26 arelight ones and are merely of sufficient strength to hold the supported stoppers or the like against the peripheries of the grinding or polishing wheels which have been indicated generally at W.

In practice the spindles 2! can be pulled away from the wheels W by means of the finger pieces 24 at which time the blades 25 will move away from the rods 28. As soon as the finger pieces are released the stems will move back toward the wheels under the action of springs 26.

While the stems are withdrawn from the wheels the stoppers or other articles to be ground or polished are inserted into the sockets 32, the holders being so proportioned that the edges of the stoppers or the like which are to be dressed or polished will project therebeyond. After the stoppers have been placed in the holders and the stems released to bring the held articles in contact with the wheels, a rapid and effective grinding or polishing operation will be set up due to the fact-that three motions are utilized. Not only are the wheels W rotating at the desired speed but all of the spindles 2| are being simultaneously rotated about their longitudinal axes by shaft in and the gearing in housing 2t. Furthermore, shaft i is being reciprocated during this operation by the action of cam IS on lever l5. This reciprocating motion will be such as to move the held articles back and forth along the peripheries of the contacting wheels. As a stopper becomes properly finished the spindle 2| supporting it can be swung outwardly, the stopper removed, and another inserted whereupon the operation can be continued. The speed of rotation and reciprocation of the stoppers is quite slow due to the speed reducing gearing employed and as the held articles are constantly in movement against the faces of the wheels W, said wheels will be free from grooves or channels which might otherwise be produced therein.

It will be noted that the axis of rotation of each supported stopper S or the like is extended across the path along which the stopper is reciprocated. In other words the plane of rotation of the stopper coincideswith its plane of reciprocation. As the stopper advances in either direction during its rotation the grinding or polishing actionwill be in the direction of the circumference of the stopper and not along lines extending transversely of the periphery. Consequently there would be no advancing stopper edges to be chipped off through frictional engagement with the polishing or grinding wheel and the dragging action of the stopper or the like upon the wheel.

Should it be desired to maintain one of the stems 2| in retracted position against the action of its spring 26 it would merely be necessary to thrust through rod 28 against the blade 25 associated with that particular spindle. The rod has a notch 43 which can drop into engagement with guide plate 21 and thus hold the rod against sliding movement.

Blades 25 are of suflicient width to prevent them from becoming disengaged from their rods 28 during the reciprocation of shaft while one or more of the stems 2| are contacted.

While this'apparatus is especially designed for grinding or polishing the edges of glass stoppers or the like it is to be understood that it will be found useful in similarly treating other kinds of articles.

What is claimed is:

1. A machine of the class described including a shaft, means for rotating the shaft, means operated by the rotation of the shaft for reciprocating it, a housing supported by and adapted to reciprocate with the shaft, a spindle extending from the housing, means for transmitting rotary motion from the shaft to the spindle, means on the spindle for holding an article to be treated, yielding means for holding the spindle normally in one extreme position, and means connected to the housing for shifting the spindle away from said position, said means including a push rod and means movable with the housing for slidably engaging the end of the rod during the reciprocation of the shaft and housing.

2. A machine of the class described including a shaft, means for rotating the shaft, means operated by the rotation of the shaft for reciprocating it, a housing supported by and adapted to reciprocate with the shaft, a spindle extending from the housing, means for transmitting rotary motion from the shaft to the spindle, means on the spindle for holding an article to be treated, yielding means for holding the spindle normally in one extreme position, means connected to the housing for shifting the spindle away from said position, said means including a push rod and means movable with the housing for slidably engaging the end of the rod during the reciprocation of the shaft and housing, and means cooperating with the rod for holding it against movement when shifted from normal position, thereby to hold the spindle in the position to which it had been shifted 3. A machine of the class described including a shaft, means for simultaneously rotating and reciprocating the shaft, gear housings mounted to swing upon the shaft and to reciprocate therewith, spindles extending from the housings and driven by the shaft, article holding means on the spindles, fingers extending from the housings for swinging the spindles in one direction, yielding means for resisting said swinging movement, and means for holding the spindles against swinging back to their normal positions, said means including slidable rods, guiding means therefor, means on the respective housings for sliding engagement with the ends of the respective rods, and cooperating means on the rods and means for holding the rods against movement.

4. In a machine of the class described a rotatable wheel, means for supporting an article for rotation in a plane extending substantially radially of the wheel and about an axis in the plane of rotation of the wheel, means for moving said

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