US773363A

US773363A - Millstone.

Info

Publication number: US773363A
Application number: US19015004A
Authority: US
Inventors: Carl P Anderson
Original assignee: Individual
Current assignee: Individual
Priority date: 1904-01-22
Filing date: 1904-01-22
Publication date: 1904-10-25
Anticipated expiration: 1921-10-25

Description

No, 773,363. PATENTED OUT. 25, 1904.

G. P. ANDERSON.

MILLSTONE.

JAN. 22, 1904.

APPLICATION FILED NO MODEL.

mfg E 55- E 5,

. 3/ K I v Patented October 25, 1904.

NITE STATES ATENT OFFICE.

CARL P. ANDERSON, OF EVERETT, MASSACHUSETTS.

MILLSTONE.

SPECIFICATION forming part of Letters Patent No. 773,363, dated October 25, 1904.

Application filed January 22, 190 Serial No. 190,150. (No model.)

To all whom it ntay concern:

Be it known that I, CARL P. ANDERSON, a citizen of the United States, and a resident of Everett, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Millstones, of which the following is a specification.

This invention relates to improvements in millstones for grinding paint, grain, or other materials, and it relates especially to the construction of the feed-furrows in such a manner as to render them capable of being readily dressed from time to time as the face-of the stone wears out, as will hereinafter be more fully shown and described, reference being bad to the accompanying drawings, wherein Figure 1 is a top plan view of one of a pair of my improved millstones. Fig. 2 is a crosssection on the line 2 2 in Fig. 1, showing the feed-furrows filled with a suitable material softer than the body of the stone; and Fig. 3 is a cross-section on the line 3 3 in Fig. 1.

Similar letters refer to similar parts wherever they occur on the different parts of the drawings.

The invention relates especially to molded millstones made of emery composition or the like, but may also be applicable to natural material stones without departing from the essence of my invention.

In the drawings, A represents a preferably molded millstone on which E is the central perforation, as usual. On the face of such stone is arranged a series of tangential feedfurrows C 0, extending from the middle of the stone to nearly the outer periphery thereof with a solid portion A being left in the stone at the outer end of each feed-furrow, as shown in Figs. 1 and 2. The said feed-furrows extend only partially through the thickness of the stone, leaving a solid portion A. at the bottom of each feed-furrow, as shown in the drawings. The said feed-furrows are afterward filled with suitable material or composition D softer than the body of the stone, and for such purpose I may use cement, sulfur, or any desired material or composition that is softer and more readily shaped or dressed than the body of the stone. The face of such composition in the feed-furrows can readily be dressed to the inclination, as shown at (Z in Fig. 3, and this can readily be done by any suitable tool, such as a carpenters chisel, a scraper, or the like.

In ordinary millstones, either natural or hand composition ones, the feed-furrows are out directly in the face of the stones by a pick or similartool, and this has to be repeated from time to time during the wear and subsequent refacing of the stone, which renders the operation both costly and time-consuming. By making tangential furrows in the stone and filling the same with a material, substance, or composition considerably softer than the body of the stone, such feed-furrows can be readily shaped or dressed from time to time as occasions may require simply by scraping off or removing a portion of the softer material D contained in said feed-furrows, as above described. In addition to such tangential feed-furrows the face of the stone is provided with the ordinary smaller furrows, as is common in millstones.

Between the main furrows C and extending from the perforation B to the periphery of the molded millstone and also extending from the outer ends of the said main furrows to said periphery are auxiliary furrows, as E, represented as tangential. These auxiliary furrows, like the main furrows, are situated in the upper or working face of the stone and serve their usual purpose in grinding.

What I wish to secure by Letters Patent and claim is In a millstone, a circular body of suitable material, having a central opening, a series of main feed-furrows extending outward from said opening toward but short of the periphery of said body, and a series of auxiliary furrows extending outward from said opening to the periphery between the furrows and also extending outward from the outer ends of the main feed-furrows to said periphery, whereby a portion of the stock of the body will be leftbetween the outer end walls of the several feed-furrows and the periphery of said body, and filling material in the furrows, softer and more readily shaped or dressed than said body. In testimony whereof I have affixed my signature in presence of two witnesses.

CARL P. ANDERSON. Witnesses:

ALBAN ANDREN, LAURETZ N. MoLLER.