US608171A - Wood-finishing device - Google Patents

Description

No. 6o8,m. Patented Aug. 2, |398. c. Bmw.

WDUD FINISHING DEVICE.

(Application med Apr. 11, ms.) (No Model.)

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CHARLES BIRELY, OF SHELBYVILLE, INDIANA.

WOOD-FINISHING DEVICE.

SPECIFICATION forming part of Letters Patent No. 608,171, dated August ,2, 1898. Application filed April 11, 1898. Serial No. 677,135.. (No model.)

To @ZZ whom t may concern,.-

Beit known that I, CHARLES BIRELY, of Shelbyville, Shelby county, Indiana, have invented certain new and useful Improvements in VVood-Finishing Devices, of which the following is a specification.

It has heretofore been found impracticable to smoothly finish wood en surfaces of certain forms by machinery. For instance, straight or curved moldings or beadings in the strip or on the edges of wooden pieces and also straight, spiral, and circumferentially-fluted turned work has required to be smoothly iinished by means of hand sandpapering performed with patience and skill, the conclusion having been reached, after many experiments with a variety of polishing systems, that such work would not lend itself to 1nachine operations.

My invention pertains to means forsmoothly .finishing such work by machinery in a superior manner and with great rapidity and by the use of unskilled labor.

My improvements will be readily understood from the following description, taken in connection with the accom panying drawings, in which- Figure lis a side elevation ofa wood-finishing device, illustrating my invention; Fig. 2, a vertical transverse section of the same, and Fig. 3 a face view of one of the finishing laminze.

In the drawings, l indicates an arbor; 2, a collar thereon; 3, a loose collar thereon; 4, a nut screwed upon the arbor and serving -to force collar 3 toward collar 2; 5, a cylinder formed of sandpaper laminas strung upon the arbor and clamped between the two collars; G, one of the laminze, each of which has a central hole to go upon the arbor; 7, the wings of the laminze, their peripheral extremities being pointed by arcs concentric with the arbor, and S inwardly-extending cuts between the win gs.

The laminae 6 are cut from sandpaper of `an appropriate grade, preferably No. 0 or N o. l, the cutting being done, preferably, by means of a punch and die. A ,diameter of from four to six inches will be found quite satisfactory in practice. The laminze are strungupon the arbor at random, and the clamping-collars should have less diameter than that of the laminze, good practice being to have the collars a couple of inches less in diameter than the cylinder. The independent wings of the laminae give to the periphery of the cylinder a yieldingbrush-like character, the peripheral edges of the wings being capable of entering `the finer iiutings and grooves of wooden moldto be mounted in suitable bearings,and it,with

its cylinder, is to be given rapid rotation by means of power suitably applied. The work to be finished is then to be applied to the surface of the rapidly-revolving cylinder, sufficient pressure being exerted to cause the win gs of the laminae to yield to conform their abrasive side faces to the sinuosities of the work, the work being advanced over the rotating cylinder, so as to present all its parts progressively to the action of the cylinder,4 the direction of advance corresponding substantially with that ofthe members of the molding or iiuting being finished. In the action of the laminze upon the wood the pressure with which the abrasive material acts upon the wood is substantially that due to the side stiffness of a sheet of sandpaper, and under the effect of the high rotation of the cylinder this pressu reis sufficient to quickly produce a high character of smooth finishing without danger of materially damaging the sharp Vcorners of moldings or flutings.

I claim as my invention- In a wood-finishin g device,the combination, substantially as set forth, of an arbor, clamping-collars thereon, and a cylinder formed of sandpaper laminae clamped between said collars, said sandpaper laminze havingindependent win gs with peri pheries concentric with the arbor.

CHARLES BIRELY. Vitnesses:

HARRY WHITCOMR, CHARLES Davis.

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