IMPROVE- MENTS IN MASTICATORS OR MACHINES EMPLOYED IN THE MASTICATION OF GUTTA PERCHA, INDIA-RUBBER, AND OTHER SIMILAR SUBSTANCES."
Year: 1861

page_text: LETTERS PATENT to Edwin Thomas Truman, of Old Burlington Street,
in the County of Middlesex, Surgeon, for the Invention of "IMPROVE-
MENTS IN MASTICATORS OR MACHINES EMPLOYED IN THE MASTICATION OF GUTTA
PERCHA, INDIA-RUBBER, AND OTHER SIMILAR SUBSTANCES."
PROVISIONAL SPECIFICATION left by the said Edwin Thomas Truman
at the Office of the Commissioners of Patents, with his Petition, on
the 22nd February 1861.
I, EDWIN THOMAS TRUMAN, of Old Burlington Street, in the County of
Middlesex, Surgeon, do hereby declare the nature of the said Invention for "IM-
PROVEMENTS IN MASTICATORS OR MACHINES EMPLOYED IN THE MASTICATION OF GUTTA
PERCHA, INDIA-RUBBER, AND OTHER SIMILAR SUBSTANCES," to be as follows:-
In the mastication of gutta percha or india-rubber in or by means of
metallio masticators, the friction of the axes revolving in the bearings produces
more or less abrasure of the surfaces of the metal, and the metallic particles
thus produced adulterate or act more or less injuriously upon the substance
under mastication.
In masticators made of glazed earthenware, or other brittle material, the
effect of the friction has been not only to rub off particles of the ware, but
also to throw the roller out of truth, and thus cause the breaking of it or
of the case.

page_text: In order to prevent these injurious effects I construct a masticator or
masticating machine with the axle or axles of the roller or rollers supported
in bearings outside, and apart from the sides of the case of the machine in
which the roller or rollers revolves or revolve; and I form apertures in the
sides or ends of the case through which the axles of the rollers pass, of such
diameter that the axle or axles shall not revolve in contact with the case; and
when the case of the masticator, or its roller or rollers, is or are composed of
earthenware, stone, glass, or other brittle material, I fix such roller or each of
such rollers upon a metal spindle or axle which passes through the case, and
is supported and revolves in bearings outside the case, as above mentioned.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Edwin Thomas Truman in the Great Seal Patent Office
on the 22nd August 1861.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, EDWIN
THOMAS TRUMAN, of Old Burlington Street, in the County of Middlesex,
Surgeon, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by. Her Letters
Patent, bearing date the Twenty-second day of February, in the year of our
Lord One thousand eight hundred and sixty-one, in the twenty-fourth year of
Her reign, did, for Herself,. Her. heirs and successors, give and grant unto
me, the said Edwin Thomas Truman, Her special licence that I, the said
Edwin Thomas Truman, my executors, administrators, and assigns, or such
others as I, the said Edwin Thomas Truman, 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, exercise, and vend, within the United Kingdom
of Great Britain and Ireland, the Channel Islands, and Isle of Man, an
Invention for "IMPROVEMENTS. IN MASTICATORS OR MACHINES EMPLOYED IN THE
MASTICATION OF GUTTA PERCHA, INDIA-RUBBER, AND OTHER SIMILAR SUBSTANCES,"
upon the condition (amongst others) that I, the said Edwin Thomas Truman,
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 late
of the said Letters Patent.

page_text: NOW KNOW YE, that I, the said Edwin Thomas Truman, 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 thereof, that is to say :-
In the mastication of gutta percha or india-rubber in or by means of
metallic masticators, the friction of the axes revolving in the bearings produces
more or less abrasure of the surfaces of the metal, and the metallic particles
thus produced adulterate or act more or less injuriously upon the substance
under mastication.
In masticators made of glazed earthenware or other brittle material, the
effect of the friction has been not only to rub off particles of the ware, but
also to throw the roller out of truth, and thus cause the breaking of it or of
the case.
In order to prevent these injurious effects, I construct a masticator or
masticating machine with the axle or axles of the roller or rollers supported
in bearings outside and apart from the case of the machine in which the
roller or rollers revolves or revolve, and I form apertures in the sides or ends
of the case through which the axles of the rollers pass of such diameter that
the axle or axles shall not revolve in contact with the case; and when the
case of the masticator or its roller or rollers is or are composed of earthenware,
stone, glass, or other brittle material, I fix such roller or each of such rollers
upon a metal spindle or axle which passes through the case, and is supported
and revolves in bearings outside the case, as above mentioned.
And having now described the nature of my said Invention, and in what
manner the same is to be performed, I declare that I claim,-
First, constructing masticators with apertures in the case thereof for the
passage of the roller or axle of the roller made to rotate therein of such
diameter as to allow of such roller or axle turning. freely in such apertures
without coming in contact with the case.
And second, mounting rollers in masticators upon independent axles, in
manner and for the purpose herein-before described.
In witness whereof, I, the said Edward Thomas Truman, have hereunto
set my hand and seal, this Twenty-second day of August, One thousand
eight hundred and sixty-one.
זיזוז מב
THA
EDWIN THO. TRUMAN. (L.S.)