IMPROVEMENTS IN MACHINERY FOR GRINDING OR CRUSHING BONES AND OTHER SUBSTANCES
Year: 1855

page_text: PROVISIONAL SPECIFICATION left by Frederick Weaver at the Office of
..the Commissioners of Patents,, with his Petition, on the 8th June 1855.
I, FREDERICK WEAVER, of Clarance Place, Heathfield. Road, Handsworth,
in the County of Stafford, Bone Dealer and Grinder, do hereby declare the
nature of the said Invention for "IMPROVEMENTS IN MACHINERY FOR GRINDING
OR CRUSHING BONES AND OTHER SUBSTANCES" to be as follows:-
The use of a slide in the plate or frame of the mill, which not only carrys
the distance bars by which the rollar or cylindar is forced up to and kept in its
proper place from time to time required, according to the differant degrees of
fineness desired in the grinding of the bones or other substances, but also
carrys the clearers or guards into. their proper places, and keeps the points in
the grooves between the cutting teeth of the rollars or cylindars, and prevents
such grooves from being filled or clogged up
It also consists in an improved method of adjusting and holding such
clearers, by seperate holes or slots cast-or- drilled-into--the-slide-and-the
stationary end of the frame of the mill, and in fixing and holding each clearer
by a set and lock pin. It also consists in lengthening the frame of the mill,
making a bearing for the slide above set forth, and forming a foot or pillar
at the bottom of the frame for-the spring to lodge_or_bear against.

page_text: The Invention also consists in, and claims as a principle, the mode of producing
and applying the action of and regulating the power of springs or leavers upon
slides or plates carrying clearers, as before described.
That the principle and action of this Invention may be more readily seen
and understood, a Drawing of the machine or sectional part of it is annexed,
showing showing the application of the principle. Like letters refer to similar
parts.
The frame A is made about double the length of its width, and forms a
bearing or bed for the slide B; at the end is a pillar or bracket C, acted upon
and pressed by a spring D; a bush or socket (a) is placed upon the center of
the back of the spring D, into which a pin or screw E presses, and acts upon
and conveys and regulates the power of such spring upon the slide B, and
keeps it in its proper place or work; a weighted leaver may be applied to any
part of the slide B in lieu of or in conjunction with the spring D. The clearers
Fare fitted into the holes or slots in the slide and end of frame, and are
regulated and kept in their proper places by means of the lock and set pins G
acting upon the tops and ends of them.
Some of the advantages derivable by the above Invention are as follows:-
When any hard substance, such as iron, steel, or other mineral of a like
nature less compressable than the bones or other substances to be crushed or
ground comes between the cutting or crushing cylindars or rollars H, the
.collars (c) of the movable rollar H are pressed by it with more than usual force
against the points of the distance bars. (b), which are fitted into the slide, and
convey the force to it, and the pin or screw E fitted into the other end of the
slide conveys that force or action to the spring, which gives way, and allows
-the iron or other hard-substance to pass through without breaking or injuring
the clearers or other parts of the machine; the spring or leaver then forces the
slide which carries the clearers and bars into their former working positions.