US1547387A - Grinding machine - Google Patents

Description

July 28, 1925.

J. HARRIS GRINDING MACHINE Filed April 9, 1921 2 Sheets-Sheet 1 @XM R July 28, 1925.v 1,547,387

J. HARRIS GRINDING MACHINE FiledApril 9, 1921 2 sheets-snm z y f gM/fff izatented July 255, 1925, l

JCLN I-ARRS, OF LAKEXVOOD, OHIO.

GRINILDING MACHINE.

Application led April 9,

To @ZZ 107mm it may conce/w.'

-Be it known that I, JoHN Hannie, a citizen of the United States, residing` at Lakewood, in the county of Cuyahoo'a and State f Qhio, have invented a cerf` fn new and useful improve" xnt in Grinding liachines, of which the follofving` a full, clear, and err.- act description, reference being` had to the accoinpanyingg drawings.

This invention relates to grindingl machines and, in the embodiment shown herein, is particularly well adapted for finishing the ends of objects such as tips for blowpipes, which ends are liable to be provided with burrs, projections or inequalitiesi 1t is the general purpose and object of the invention to provide machine of t t chai-- acter which is simple and econon'iical of production, and which is particularly eliicient in operation. Further and more l` ted objects of the invention will be set forth hereinafter and are realized in and through the combinations of elements embodied in the claims hereto appended.

ln the drawings, Fig'. 1 represents a side elevation of a machine constructed in accordance with my invention; F igs. 2, 3 and 4t sectional views corresponding, respectively, to the lines 2 2, 3 8, and 4% of Fig. 1, the worm gear, the rotating platform and the track being` shown in elevation in Fig. 3; and Fig. 5 an enlarged sectional detail through one of the sockets in which 'the tips are inoiinted,'sliowiiig the manner of supporting the tip therein and upon a track therebeneath.

Describing?,` the various parts by reference characters, 1 and 2 denote a pair of end uprights, each of which may be a metal channel, as shown, and supporting at their upper ends a cross member 3, which may also be of channel shape, with its flanges projecting upwardly, and conveniently secured to the members 1 and 2 by angle brackets 4. Supported by the said members '1 and 2 through angle brackets 5 is an intermediate cross member 6. The lower ends of the uprights may be braced by strut members 7 secured thereto and to the floor or foundation and may also be connected by a rod 8. Carried by the uprights 1 and 2, below the .member 6, is a pan-like receptacle comprising the bottom 9 and the side and end walls 10.

11 denotes a motor mounted upon a base 12, shown as supported by the top member 1921. Serial No. 459,919.

3. The shaft 13 of the motor is prov'ded with a pulley 141i by means of which and a pisiley l'and belt 16, a shaft 17 is driven, the said shaft beingshown 4as journaled in supports V18 interposed between and carried by the members 3 and 6. The shaft 17 is provided at the end opposite the pulley 15 with a worm 1Ta meshing with a rm gear 19 upon a vertical shaft 20 journaled in the members 3 and 6 and projecting` downwardly into the pan, through a cover a partly closing the top of the same. The lower end of the shaft 2O is provided with a grinding;l wheel 21, preferably of carborundum. rihe shaft is provided also with a bevel pinion 22 meshing with a bevel gear 23 on a shaft 2d journaled in a U-shaped bracket 25. rthe shaft 24 is provided at the end opposite the gear 23 with a pinion 26 meshing,` with a pinion 27 on a stud 28, the latter pinion meshing with a gear 29 on a shaft 30, the said shaft being provided with a worm 31 meshing with a worm gear 32, rigid with a vertical shaft 33 mounted in the members 3 and 6 and having? its lower end provided with aA rotary platform 8st.

The platform 3e is preferably in the shape of a diskhavingaperipheral series of bores therethrough, each having an upwardly extending sleeve 36 and constituting` sockets.

Supported on a suitablebracket 37v and adjustablestandards S6-38a is an arcuate track comprisingA an upwardly inclined member 39 and a substantially horizontal member 10. The track is positioned beneath the platform 34, beneath the sockets 36, with its central or intermediate portion supported by the said bracket. The portion or member of the track extends from the bracket 37 to a point slightly above the upper surface of the grinding wheel 21, having its upper end supported by the adjustable standard The portion or member t0 entends from the bracket 37 to a point adjacent to but positioned slightly below the upper surface of the wheel 21 where it is supported by the adjustable standard 38a. These standards are mounted in the -pan 9 and serve to adjust the ends of the track 39, 4L() to compensate forthe wear on the grinding wheel.

lVith the parts constructed and arranged as described power will be transmitted from the motor shaft 13, through pulleys- 14 and and belt 16 to the shaft 17 and thence by the worm 172L and worm gear 19 to the shaft 20, driving the grinding wheel 21. By means of the reducing-gear connections between the shaft 20 and the platform 34, the latter will be driven at a slow speed, as

compared with the grinding wheel 2l, in the ence of particles of abrasive material on said Y section, such particles being removed from the wheel 21 during its operation. rIhe tips l1 will fit loosely within their sleeves 36 and openings 35 so that their lower ends may be pressed by gravity into engagement with the rapidly rotating grinding wheel. By the time when the tips shall have traveled across the surface of the grinding wheel, the buri's or other projections on the lower ends thereof will have been removed, and the tips thus finished may be removed as soon as they again reach the track member 39; or the operator may remove them as they are brought to him along the track member 39 by the rotation of the platform; the operator replacing the finished tips with unfinished o-nes.

In operation the foregoing machine has been found to be particularly efficient, finishing olf the ends of some sixty tips per minute and requiring the attention of but a single attendant. Furthermore, as will be evident from the drawing, the machine by which this result is accomplished is extremely simple and economical of production. It will also be noted in this connection that the grinding action takes place over the entire surface of the wheel 2l, hence the wheel is worn down evenly and does not require redressing.

After the tips have had their lower ends ground in the manner described, they may be inserted into a standard type of burnishing machine 42, mounted on the upright 2, the work-receiving bushing of such machine being indicated at 43. The pan 9 serves to collect the lings or particles ground from the ends of the tips. If desired, the track member 40 may be dispensed with, in which case the tips will be dropped into the pan as they are carried from the upper surface of the grinding wheel by the rotary platform.

I-Iaving thus described my invention, what I claim is:

l. Inamachine of the character described,

lower ends of the articles placed therewith# in, said track member being inclined upwardly with its delivery end substantially flush withthe upper surface of said wheel, Y

and means for driving said platform.

2. In a machine of the character described, the combination of a vertical shaft, a grinding wheel carried thereby, means for driving said shaft, a second vertical shaft, a rotary platform mounted on the second shaft above and overlapping the upper surface of the grinding wheel, the said platform having a peripheral series of sockets adapted to support articles therein with their lower ends in engagement with the upper surface of the grinding wheel, speed reducing connections between the said shafts, and a segmental track beneath the portion of the platform extending beyond the grinding wheel and adapted to support the articles in said sock ets, one lend of said track extending upwardly in order to `deliver the articles car- Y ried by -said sockets to the upper surface of said grinding wheel, and the other end of said track being positioned below the upper surface of the grinding wheel and adapted to receive the ground articles.

3. Inamachine of the character described, the combination of a substantially horizontal grinding wheel, a rotary platformabove and overlapping the upper surface ofthe grinding wheel, the said platform having a series of sockets adapted to support articles therein with their lower ends in engagement by gravity with the upper surface ofthe grinding Wheel, a track beneath the portion of the platform extending beyond the grinding wheel and adapted to support the articles in said sockets, one end of said track extending upwardly in order to deliver the articles carried by said sockets to the upper surface of said grinding wheel, the other end of said track being positioned below the upper surface of the grinding wheel and adapted to receive the ground articles, and means for driving the said wheel and platform.

In testimony whereof, I hereunto aflix my signature.

JOHN HARRIS.

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