Precious Stones.
Year: 1887

page_text: Date of Application, 25th June, 1887
Complete Left, 25th Apr., 1888
Complete Accepted, 25th May, 1888
Precious Stones.
I, FREDERICK NOOкOLD, of 63 Hatton Garden, in the City of London, Diamond
Cutter and Polisher, do hereby declare the nature of my said invention to be as
follows:-
The object of my invention is to effect improvements in the method of cutting
diamonds, and other precious stones.
In carrying out my invention, I make use of an ordinary lathe or analogous tool,
and fit a small cylindrical chuck thereto in the usual manner. The working end of
this chuck is fitted with a number of rough diamonds, forming a working face; the
rough diamonds being suitably embedded in cement, so as to rotate therewith when
driven (preferably) at a moderate speed.
At about the centre of an ordinary hand rest or analogous tool, I fit a pin, which
serves to steady the stick and keep it in position, while the stone is being cut.
The diamond or other stone to be cut is attached to the end of the stick by cement
in the usual manner; and is held upon the rest and against the pin, by hand. The
stone is held against the rough diamonds fitted in the chuck, while the latter is caused
to revolve, and is so held until the diamond held in the stick is shaped. Its position
in the stick is then changed, and a fresh portion treated in the same manner, and so
on until it is finished.
Water is supplied to the parts of the stones which are being operated upon.
In some cases I fit one or more of the stones to be operated upon, in or on the
chuck and cause it to rotate therewith; cutting the same by means of diamonds
cemented to the end of the stick.
n
1
GEO. DOWNING,
Agent for Applicant.

page_text: Precious Stones.
I FREDERICK NOCKOLD, of 63 Hatton Garden, in the City of London, Diamond
Cutter and Polisher, 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 object of my invention is to effect improvements in the method of cutting
diamonds, and other precious stones.
In carrying out my invention, I make use of an ordinary lathe, or analogous tool
either in a horizontal or vertical position and fit a small cylindrical chuck thereto in
the usual manner. The working end of this chuck is fitted with a number of rough
diamonds, forming a working face. The rough diamonds are suitably embedded in
cement, so as to rotate therewith when driven (preferably) at a moderate speed.
At about the centre of an ordinary hand rest or analogous tool, I fit a pin, which
serves to steady the stick, and keep it in position while the stone is being cut.
The diamond or other stone to be cut is attached to the end of the ordinary stick
by cement in the usual manner and is held upon the rest and against the pin, by hand.
The stone is held against the rough diamonds fitted in the chuck, while the latter is
caused to revolve, and is so held until the diamond held in the stick is shaped. Its
position in the stick is then changed, and a fresh portion treated in the same manner,
and so on until it is finished.
Water is supplied to the parts of the stones which are being operated upon.
In some cases I fit one or more of the stones to be operated upon, in or on the
chuck, and cause it to rotate therewith shifting their positions as required, and cutting
the same by means of diamonds cemented to the end of the stick.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what I
claim is :-
The improved method of cutting diamonds and other precious stones substantially
as herein before described.