US930639A - Grinding-machine. - Google Patents

Description

F. WOODRUFF. GRINDING MACHINE. APPLICATION FILED FEB. 10, 1909.

Patented Aug. 10, 1909.

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. M FFVENTOTR Attys P. WOODRUPF. GRINDING MACHINE. 'AP'PLIOATION FILED PBB.10, 1909.

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APPLICATION FILED 11:12.10, 1909.

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APPLICATION FILED FEB. 10, 1909. 930,639. Patented Aug. 10, 1909.

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GRINDING MACHINE.

APPLICATION FILED 513.10, 1900.

930,639. Patented Aug. 10,1909.

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WITNESSES:

NVENTOR JAM I UNITED' TATES PATENT oEErcE.

FRANK wooDRUFF, OF ROCHESTER, PENNSYLVANIA, ASSIGNOR TO H. o. FRY GLASS ooM- PANY, or ROCHESTER, PENNSYLVANI A oonron 'rroN OF PENNSYLVANIA.

enmnmeamwm.

Specification of Letters Patent.

Patented Aug. 10, 1909.

To all whom it may concern:

Be it known that I, FRANK W OODRUFF, a citizen of the, United States, residing at Rochester, in the county of Beaver and State of Pennsylvania, have invented or discovered certain new and useful Improvements in Grinding-Machines, of which improvements the following is a specification.

In the accompanying drawings forming a part of this specification Figure 1 is a top plan View of my improved grinding machine;

ig. 2 is an end elevation of the same; Fig.

3 is a sectional elevation on a plane indicated by the line III -III Fig. 1; Fig. 4 is a sectional elevation of the upper portion of the machine on a plane indicated by the line IV--IV Fig. 1; Fig. 5 is a-view on the same plane as Fig. 3, illustrating the construction devised for grinding convex surfaces, and Fig. 6 is a front elevation of the machine.

I My improved grinding or polishing machine is formed with a vertical shaft ,1 which is so mounted in bearings 2, as to have a small vertical movementas hereinafter described. A disk 3 is secured on this shaft insuch manner. that the side of the disk will rest upon the periphery of a disk 4 on the power shaft 5. .As shown the disk 4 is adustable alon the shaft to permit of the regulation of t e rate of rotation of the shaft 1, to the upper. of which is secured the block or chuck 6. or 6 The chuck is made with a concave or convex surface dependent upon the character of the surface 0 be formed.

The chuck is provided with suitable gripping or other side of the box, as shown in Figs. 3,"

4 and 5. The esca e of material through openings for the shaft is prevented by a disk 9. fitting sufiiciently tight on the shaft 1 as to rotate therewith and throw off abrading material lod ing thereon.- The abrading disk 10 is held in contact with the article b pin 11 projecting into a socket 12 on the bac of the disk and adjustably secured in a sleeve 13 carried by an extensible arm 14. This arm is given an oscillatory movement in order to change the osition of the abrading struction shown in Figs. 2 and 3 the arm is ivotally connected to ashaft 15 mounted m a suitable bearing 16 and having an arm 17which is shifted to oscillate the shaft 15 and parts carried thereby. Any suitable means can be employed for shifting the arm 17, as for example in the construction shown a pin 18 on the bar 19 engages a slot in the arm 17, and the bar 19 is reciprocated by means of earns 20 o ositely arranged on the drivenshaft21. T isconstructionis adapted to grind concave Surfaces and the parts employed for moving the disk 10 are so constructed and. arranged that the disk will move in the arc of a circle whose center is above the surface operated on. For grind.

ing convex surfaces as shown in Fig. 5, the arm 14 is pivotally connected to an upwardly extending arm 22 on the shaft 15 In this construction the abrading tool or disk moves in the arc of a circle whose center is below the surface operated on. The abrade ing disk is yieldingly held in operative relation to the lens preferably by means of a weight 23 slipped onto an-upward extension of the pin 11. The arm 14 and parts carried thereby can be raised for placing lenses on the chuck by any suitablemeans, as for exarn le by a cord 24 Ipassing over a pulley 25 and connected to a ever 26, which is locked by a hook 27 when the arm has been raised.

The abrading material which is generally mixed with some liquid as water is poured into the box ortrough 8, and by the operation of a rotating paddle wheel 28 is thrown up into a gutter 29 in the hood 30, the gutter connects with nozzles in the sides of the hood and to these nozzles are pivotally connected spouts 31 which will direct the abrading material down onto the lens.

t is preferred to arrange two grinding machines 1n the same box or trough, although they may operate independently. In such case abrading material can be fed to bothmachines by the same means.

When it is desired to stop the rotation of the chuck or block 6, the shaft 1 is raised until the disk 3 no longer contacts with the peri hery of disk 4. This movement of the sha can be conveniently effected by a lever 32 connected by a link to the treadle 33.

I claim herein as my invention:

1. In a grinding machine, the combination of a vertical shaft, a chuck or workdisk on the lens oro er article. In the conholder carried by said shaft, a horizontal osdisk, a pin carried by the arm and looselg (315-;

cillating shaft, an arm having a pivotal con nection to the shaft, so constructed as to permit of the vertical movement of the arm, a pin carried by said arm, am abrading disk engaged by the pin and movable'thereby.

' a grinding machine, the combination of a vertical shaft, a chuck oIf-work-holder gaging the disk and yielding means for ing the disk to its work.

3. In a grinding machine;'the combination of a vertical shaft,--a chuck or work-holder carried {by the shaft; a horizontal oscillating shaft, an arm pivotally connected to the shaft, the pivotal connectionbeing con- 20 structed to permit of the vertical movement of the arm, an abrading disk, a in carried by\the arm and engaging the dis a longitudinal movable bar and connections there from to' oscillate the shaft, and cams for 25 shifting the bar. x

In testimony whereof, I have hereunto set my hand.

, FRANK WOODRUFF.

,Witnesses: CHARLES BARNETT, J. HERBERT BRADLEY.

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