IMPROVEMENTS IN MACHINES FOR CRUSHING AND POUNDING PROVISIONAL SPECIFICATION
Year: 1861

page_text: LETTERS PATENT to François Frédérick Dumarchey, of Boulevart de
Strasbourg, in the City of Paris, in the Empire of Frânce, Engineer, for -
the Invention of "IMPROVEMENTS IN MACHINES FOR CRUSHING AND POUNDING
PROVISIONAL SPECIFICATION left by the said François Frédérick
Dumarchey, at the Office of the Commissioners of Patents, with his
Petition, on the 27th November 1861.
I, FRANÇOIS FRÉDÉRICK DUMARCHEY, of Boulevart de Strasbourg, in the
City of Paris, in the Empire of France, Engineer, do hereby declare the nature:
of the said Invention for "IMPROVEMENTS IN MACHINES FOR CRUSHING. AND.
POUNDING STONES, ORE, AND OTHER MATERIALS," to be as follows:-
This machine is intended for crushing and pounding all material peculiar
to Macadam, and ore in general. The annexed Drawings show in Fig. 1. a.
transverse, and in Fig. 2 a longitudinal sectional view thereof; the same
consists of a frame or box A, provided with a strong crushing block B, and a.
series of sets of grooved revolving rollers C', C2, C3, C,....
...... to C, more or
less, the sets being situated in a circular manner; the rollers of each set are of
the same diameter, and revolve freely on an arbor common to the rollers of that
set; the diameter of the rollers of each succeeding series become smaller in
proportion as they are situated further from the block B; 3, 4, or more.
revolving crushing hammers F'are keyed to an arbor D, placed excentrically,
in respect to the circle formed by the sets of revolving rollers, so that the
stones, ores, or other hard materials, when thrown on the inclined plane E, are
projected by the hammers, and crushed to pieces of the required size, in

page_text: passing between these hammers and the rollers. The box A is provided with
a moveable lid G, and proper revolving motion is imparted to the arbor D,.in.
the direction of the arrow.
SPECIFICATION-in pursuance of the conditions of the Letters Patent, filed
by the said François Frédérick Dumarchey in the Great Seal Patent
Office on the 27th May 1862.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, FRANÇOIS
FREDERICK DUMARCHEY, of Boulevart de Strasbourg, in the City of Paris, in
the Empire of France, Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-seventh day of November, in the year of
our Lord One thousand eight hundred and sixty-one, in the twenty-fifth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto
me, the said François Frederick Dumarchey, Her special licence that I, the
said François Frederick Dumarchey, my executors, administrators, and
assigns, or such others as I, the said François Frederick Dumarchey, my
executors, administrators, and assigns, should at any time agree with, and no
others, from time to time and at all times thereafter during the term therein
expressed, should and lawfully might make, use, excrcise, and vend, within the
United Kingdom of Great Britain and Ireland, the Channel Islands; and Isle
of Man, an Invention for. ".IMPROVEMENTS IN MACHINES FOR CRUSHING AND
POUNDING STONES, ORE, AND OTHER MATERIALS," upon the condition (amongst
others) that I, the said François Frederick Dumarchey, my executors or
administrators, by an instrument in writing.under my, or their, or one of their
hands and seals, should particularly, describe. and ascertain the nature of the
said Invention, and in what manner the same was to be performed, and cause.
the same to be filed in the Great Seal Patent Office within six calendar
months next and immediately, after the date of the.said Letters Patent..
NOW KNOW YE, that I; the said François Frederick Dumarchey, do
hereby declare the nature of my said: Invention, and in what manner the same.
is to be performed; to be particularly described and ascertained in and by the
following statement:-
The Invention relates to an improved machine for crushing and pounding
stones, ore, and other similar hard materials, and the same is particularly.
intended for crushing or breaking large stones into. smaller. fragments, for
forming what is called road metal made use of for MacAdam or Telford roads ;

page_text: the fragments of stone for such purpose requiring to be as much as possible of
a uniform size, which is rather difficult to be obtained, without forming much
waste, when crushing by machinery; most part of the crushing machines hitherto
made use of reducing the stones into too small fragments, and giving rise,
consequently, to an enormous deal of waste, whilst by my improved crushing
machine, the fragments are of a. more uniform-size, and much less waste is
produced. The samo-may also be usefully applied for crushing or pounding
ores, coals, or other hard materials, the machine allowing to reduce them to
any suitable degree of fineness.
In the annexed Drawings, Figure I.. represents a longitudinal section taken
over the line X, Y, of Figure II., which latter shews a front view of my
improved crushing machine; in both Figures corresponding parts are marked
by the same letters of reference.
The machine consists of a strong frame A, closed on all sides, whilst a
moveable lid M, fits on the top. In this frame are securely bolted or fixed in
any other suitable. manner, a series of rollers, or preferably square steel bars
C, C¹, C³, C³, C3, or any other suitable quantity of them situated in
the horizontal position, fixed, and kept, at the required distances apart by
means of the crescent shaped stays L, of sheet or cast iron, which stays are
held by cross stays R, the ends of; which being secured in the sides of the
frame A; by these means the series of square bars C, C1, C2, C3, . . . C¹³, in
combination with the stays, L, and cross stays R, form a.grating for the crushed
stones, or other materials to, fall through in a reservoir, situated beneath or in
the lower part, of the, frame, A, whilst the bars will offer sufficient stability. for
resisting the tremendous, shocks. to. which the same will be submitted, when
the machine. is at work:. The bars C,. C, C2, . . C¹³, are situated in a
circular position, in respect to each other, and in an eccentric one in respect to
the arbor D, viz., in such manner that the distance between each suc-
ceeding bar C,, C',.C,..... C³, and the circumference of the rollers. I, at
the end of the revolving arms F, decreases, gradually in the direction of the
arrow, so as to cause the materials falling from the incline K, on the bars
C, C, C,..... C¹³, to become crushed into smaller and smaller fragments,
in the same measure as they are driven to the last bar C. The arbor D
revolves in suitable bearings E, secured either in a fixed position to the frame
A, or which may be set more or less high, according to the distance to be left
between the circumference of the rollers I; and the end bar C¹³; it may be
observed from the Drawings that the bars become of less diameter, in. the same
measure as they approach, nearer to the arbor D; on this latter are keyed the
crushing arms F by preference, three in number, which arms are fixed at

page_text: regular distances apart. One end of the arbor D is provided with a fly-wheel
G, and the other-end with a driving wheel or pulley H, for transmitting by an
endless strap, or other means, the motion- from a steam engine, or other
suitable prime mover, to the crushing machine. The end of each of the-arms
F is provided with a double fork, in which two small washers or rollers I, of
steel or other suitable very hard material turn freely on a spindle i; each of
these rollers I presents a fluting j round its periphery. The stones, ore, or
other materials to be crushed or pounded into smaller fragments are thrown
on the inclined board K, from whence they fall on the grating formed by the
bars and stays or crescent-shaped pieces L, where they will successively be
struck and crushed to pieces by the rollers I, of the revolving arms F, a
suitably quick revolving motion being imparted to these latter by the arbor D.
As a great deal of dust is formed during the working of the machine, the lid
M must not be removed until the machine is at rest; a small hole or chimney
m may be left at the top of the lid M. The stones or other materials to be
crushed having thus been reduced to fragments of the required size, these
latter fall through the grating in the reservoir underneath, from where they
may be removed from time to time, as required.
Having thus described and particularly ascertained the nature of my Inven-
tion, and the manner in which the same is put into effect, I wish it to be
understood, that I do not intend to restrain or restrict myself to the precise
details of the machine, or its various parts here above described, as many
variations may be made therefrom without deviating from the main principle
of the Invention; but what I consider to be novel and original, and therefore
claim as the Invention secured to me by the herein-before in part recited
Letters Patent, is the general arrangement of my improved crushing machine,
and particularly the eccentric position of the bars C, C³, C³, .
respect to the crushing rollers I of the revolving arms F.
C¹³, in
In witness whereof, I, the said François Frédérick Dumarchey, have
hereunto set my hand and seal, this Twenty-fourth day of May, in
the year of our Lord One thousand eight hundred and sixty-two
Witness,
DREYFOUS, Eng. Civil.
F. F. DUMARCHEY. (L.S.)