CERTAIN MACHINERY FOR RASPING, GRATING, OR REDUCING INTO SMALL PARTS OR POWDER, SUCH WOODS, DRUGS, AND OTHER SUBSTANCES, FOR THE USE OF DYERS AND OTHERS; AS ARE NOT EASILY TO BE PULVERIZED BY MERE PERCUSSION
Year: 1806

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, EDWARD
DAMPIER, of Primrose Street, in the 'City of London, Manufacturer, send
greeting.
WHEREAS His present most Excellent Majesty King George the Third
did, by His Royal Letters Patent under the Great Seal of the United King-
dom of Great Britain and Ireland, bearing date the Twelfth day of March,
in the forty-sixth year of His reign, give and grant unto EDWARD JACKSON, of
Primrose. Street aforesaid, Manufacturer, me, the said Edward Dampier, and
THOMAS SHACKLETON, of Primrose Street aforesaid, Manufacturer, our exe-
cutors, administrators, and assigns, His especial licence that we, the said
Edward Jackson, Edward Dampier, and Thomas Shackleton, our exors,
admors, and assigns, during the term of years therein expressed, should and
lawfully might make, use, exercise, and vend my Invention of "CERTAIN
MACHINERY FOR RASPING, GRATING, OR REDUCING INTO SMALL PARTS OR POWDER,
SUCH WOODS, DRUGS, AND OTHER SUBSTANCES, FOR THE USE OF DYERS AND OTHERS;
AS ARE NOT EASILY TO BE PULVERIZED BY MERE PERCUSSION," within England,
Wales, and the Town of Berwick-upon-Tweed, in such manner as to us,
the said Edward Jackson, Edward Dampier, and Thomas Shackleton, our
executors, administrators, and assigns, should in our discretion seem meet; in
which said Letters Patent is contained a proviso that if ive, the said Edward
Jackson, Edward Dampier, and Thomas Shackleton, or one of us, should not
particularly-describe and ascertain the nature of the said Invention, and in

page_text: what manner the same is to be performed, by an instrument in writing under
our hands and seals, or under the hand and seal of one of us, and cause the
same to be inrolled in His Majesty's High Court of Chancery within one
calendar month next and immediately after the date of the said Letters
Patent, that then the said Letters Patent, and all liberties and advantages
whatsoever thereby granted, should utterly cease, determine, and become void,
as in and by the said recited Letters Patent, relation being thereunto had, may
more fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
Edward Dampier, do hereby declare that the nature of my said Invention, and
in what manner the same is to be carried into effect and practice, are described
in manner following (that is to say):-
I construct a large wheel or flat surface of iron or other metal, or of any
other fit material for the purposes herein-after mentioned, and affix the same
to a vertical shaft or arbour, which is driven round by the machinery and
powers commonly used for manufacturing works. Upon the face of the wheel
I attach, by screws, keys, bolts, or any other well-known means, certain cutters
or raspers, having their edges or faces toothed and directed upwards, each of
which is fixed so that its length shall be directed towards the shaft, either pre-
cisely or with such an obliquity as that the line of the length of each rasper
shall everywhere cross the circles described by the motion of its teeth; and
close to cach cutter or rasper there is a perforation or large hole quite through
the face of the wheel, for the purpose of permitting the rasped wood or other
material to fall through.. In the use and application of this machinery the
pieces of wood, drugs, or other substances intended to be rasped, grated, or
reduced into small parts or powder, are placed and secured upon the face of
the said wheel, which, by its rotation, causes the teeth of the cutters to act
upon the same, and to cut off portions or raspings of the same, which fall
through into a proper receptacle. And I do further declare, that the face of
the said wheel may be made bevelling inwards or outwards, and will admit of
various forms, dimensions, and velocities of motion, and also that by con-
trivances well known to workmen it is easily practicable either to fix all the
cutters upon the wheel at once, and fasten them there by one key or mode of
connection, or otherwise that each cutter may be separately attached and taken
out, when needful, independently of the others.
The annexed Drawings indicate one of the constructions of the said machi-
nery, in which the face of the wheel is flat, and the cutters placed in the radial
direction. No. 1, 2, and 3, represent a large cast-iron wheel or plate; No. 5.
shews the end view or section of one of the cutters or raspers; No. 4 repre-

page_text: sents the same, viewed by looking downwards; and No. 6 represents the same,
viewed in front. The dark shaded parts of No. 1 shew six of the cutters or
raspers bolted or screwed in their respective places, and when the wheel is
completely fitted up its whole face is thus supplied; No. 3 shews the under
part of the wheel; and No. 2, being the section thereof, shews the manner in
which the cutters or raspers may be lodged and fixed in their places, although
the same may be fixed by any other proper means, as hath been already
observed.
In witness whereof, I, the said Edward Dampier, have hereunto set my
hand and seal, the Twelfth day of April, in the forty-sixth year of the
reign of our Sovereign Lord George the Third, by the grace of God of
the United Kingdom of Great Britain and Ireland King, Defender of
the Faith, and in the year of our Lord One thousand eight hundred
and six.
EDWP DAMPIER. (L.S.)
AND BE IT REMEMBERED, that on the Twelfth day of April, in the
forty-sixth year of the reign of His Majesty King George the Third, the said
Edward Dampier came before our said Lord the King in His Chancery, and
acknowledged the Instrument aforesaid, and all and every thing therein
contained and specified, in form above written. And also the Instrument
aforesaid was stamped according to the tenor of the Statuto made in the
forty-fourth year of His said Majesty's reign.
Inrolled the Twelfth day of April, in the year of our Lord One thousand
eight hundred and six.