USRE4057E - Improved machine for dressing marble - Google Patents

Description

waited gratos y 'new one.

RALPH P. BAILEY, FOB. HIMSELF, AND PLATT D. BABBITT, ASSIGNEE 0F RALPHl P. BAILEY, OF NIAGARA FALLS, NEW YORK.

Lmm Paumz Nb. 65,990, ama .me 2'5, 1867; am No. 4,057, ma .my 5, 1ero.,

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To all whom it may concern Be it known that RALPH P. BAILEY, of Niagara Falls, in the county of Niagara and State of New York invented certain Improvements in Machines for working, Dressing, and Omamenting Marble, Stone, Slate, and other similar substances, of which the following is a specification.

stonedressing machines have been generally constructed with a series of hammers or chisels,'which reduce the suriiice to be dressed by repeated blows struck by the same, imitating, to acertain extent, the method ,of dressing by hand. These machines leave the surface comparatively ro h, which rendersthem unfit for the finer kinds of wor and especiall smooth polished su e is required. They are also objectionable on account of the liability of the striking hammers or ohisels to chip out portions of the marble below the dressing-line, which requires the whole surface to be dressed away to the depth of 4the chipped-out depression or cavity, thereby involving a `waste, both of labor and material.

The object of these improvements is to avoid these didiculties and defects, by the construction of a machine, which, by operating ona different principle, will not only produce a smooth surface, but enable grooves to be readily out, and moldings formed with great ease and facility, whereby a considerable amount of material is saved, and the greater portion of the labor which is usually required to' smooth and polish a surdice after it has been dressed by the ordinary machines, is saved.

This invention consists- First, of a spring-blade or scraper secured to a head or stock, and operated so as to reduce the material by a scraping or abradin action, the blades being sulficiently elastic to yiel in passing over inequalities that would offer aresistancesuicient to endanger a machine employing rigid or unyielding blades.

Second, in the combination of a series of springblades or scrapers with a rotating head and radial arms, to the ends of .which the said spring-blades are clampe'd.

Third, in pivoting the radialfarms or blade-holders to the rotating head, so as to enable the blades to adjust themselves to the work, when the head is ro- ;tated in either direction, by the said arms inclining in either direction from a radial line, so as to cause the operative ends of the blades, when in contact with the stone, to incline backward from a perpendicular to the surface operated upon. v

Fourth, in chamfering away the inner surfaces of the clamp or blade-holder at its outer end, contiguous to the blade, so as to enable the latter to spring or for dressing marble, where av yield therein as it passes over inequalities in the surface of the stone.

' In the accompanying drawing which represents m improved spring scrapers attached to a rotating head- Figure I is a view in elevation.

Figure II is an enlarged sectional view of a portion of the head and one'of the arms and scrapers, 'slrow ing the mode of connecting the parts.

Figure III isa side view of one of the arms and blades, with a po'rtion of the head in section.

Like letters of reference designate like parts in each of the gures.

A is a disk-shaped head or stock, designed to be attached to any suitable rotating shaft, b.

To it is pivoted any required number of the arms C, by means of the pivots d, on which they vibrate to the extent permitted by the stock-bolts e c, as shown most clearly by the red linesin Fig. II.

These bolts serve the double purpose of bearings, against which the arms rest, and of securing the annular rim F to the head A, which rim holds the arms l firmly against lateral displacement.

Each arm is provided with a plate, f, secured to it by four bolts, g g, forming a clamp for holding the blade or scraper h, which consists of a plate of steel, preferably of uniform thickness, and of any required length.

This blade is held by a set-screw, k, passing centrally, or nearly so, through the hearing portion of the arm C, and pressin that portion of the blade against the clamping-jaw The surfaces ot' the plate and arm contiguous to the blade are beveled away, as at it', to allow it to spring under the pressure with which it is applied, and

-in passing over inequalities, as shown in red lines at j, Fig. II.

Keys, l l, are inserted in the holder at each'side of the blade, of suitable thickness to regulate the bearings.

The blades are sharpened at their ends to conform to the molding or other ornament to be produced on the marble, being of steel sutiiciently hard to remove, by scraping, a portion of the surface. When arranged in a head, as shown, and revolving in contact with the edge or other portion of a slab of marble, one blade follows the other in p quick succession, each removingl a small portion, but in the aggregate executing with a rapidity exceeding by five-fold that of manual labor, and without vthe risk of breakage, and the chipping which attends the use ofthe chisel, while the work is smoothly wrought, as it progresses, requiring only a slightpolshing to finish it perfectly. Any number ofarms and blades may be employed in the same head, limited only by the space on its periphery to at- I tach them. Curved and serpentine moldings are as ,insures a steady and uniform feed readily worked as straight ones, requiring only that the diameter of the circle describedby the blades shall be adapted to the radius of the curve ofthe molding. The construction is such that the head may be revolved in either direction, and work with the samev eciency, asis shown by the diagram in red, in Fig. II, where the red and black arms indicate the position of the arm when running in opposite directions.

The yielding or elasticity of the blades, which is most conveniently obtained by forming them thin enough to'spring slightly under the pressure applied, to each, and the angle at which they are presented to the stone is such as to keep them selfsharpened,or nearly so, by' the wear. The most e'ecti position of' the blades is one inclined slightly back of a radial line from the axis of the head. The blades may be of any suitable length, and each end may be formed of ,a different pattern, so that, by leversing, a dicrently formed molding will be wrought. v v

What is claimed as the 'invention of" RALPH P. BAILEY, is-

1. A spring-blade or scraper, when attached to a head or stock, and applied to dressing -or working abrading the surface thereof', substantially as hereinbef'or'e set forth.

2. The combination of a series of ,spring-blades or Scrapers, h, with the clamping-arms O, and head or stock A, for acting successively on the material to abrade it to the form of said blades, arranged and operating substantially as and for the purpose set forth.

3. The arm or holder C, when connected with the head A, or its equivalent, by means of pivot d, and the bearing-bolts e e, arranged t-o allow the blades to adjust themselves to the work when rotated in either direction, substantially as set forth.

4. The beveled inner faces a' of the clamp, arranged with t-he spring-scraper h, as and for the purpose hereinbefore set forth.

RALPH P. BAILEY. Witnesses: PLATT D. BABBITT.

JAY HYATT,

stone, or other equivalent material, by scraping or

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