An Improved Method of Mounting Diamonds for use as Drills or Cutters.
Year: 1891

page_text: Date of Application, 1st July, 1891
Complete Specification Left, 1st Apr., 1892-Accepted, 7th May, 1892
PROVISIONAL SPECIFICATION.
An Improved Method of Mounting Diamonds for use as Drills or
Cutters.
1, LÉON SALENDRE, of Romaneche Département de l'Ain in the Republic of
France, do hereby declare the nature of this invention to be as follows:-
Diamonds which are intended to be used for drills and cutters have already been
inserted into metallic envelopes or holders either formed of two pieces prepared to
receive the said diamond' and then united by soldering or brazing or inserted into
an envelope formed like the shell of a nut in which they were fixed by means of
molten metal or similar material.
The diamonds mounted in this manner are liable to work loose or to become
unseated on account of the separation of the two parts of the holder or on
account of a difference of expansion of the metals used in fixing the said
diamonds.
My improved method or process of mounting such diamonds consists in first
mounting or inserting that part of the diamond which is to be used as the working
part thereof, in the bottom of a suitably formed mould, into which I then introduce
a suitable metal in fusion (preferably iron) which thus encloses the whole
remaining part of the diamond. I thus obtain a diamond holder of one piece of
metal in which the diamond is held perfectly fast without any chance of working
loose or becoming unseated.
Dated this 1st day of July 1891
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
An Improved Method of Mounting Diamonds for use as Drills or
Cutters.
I, LÉON SALENDRE, of Romaneche, Départment de l'Ain, in the Republic of
France, do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by
the following statement :-
Diamonds which are intended to be used for drills and cutters have already been
inserted into metallic envelopes or holders either formed of two pieces prepared to
receive the said diamond and then united by soldering or brazing, or inserted into
an envelope, formed like the shell of a nut in which they were fixed by means of
molten metal or similar material.
The diamonds mounted in this manner are liable to work loose or to become
unseated on account of the separation of the two parts of the holder or on
account of a difference of expansion of the metals used in fixing the diamonds.
My improved method of mounting such diamonds, consists in first mounting or
inserting that part of the diamond, which is to be used as the working part thereof,
in the bottom of a suitably formed mould, into which I then introduce a suitable
metal in fusion (preferably iron) which thus encloses the whole remaining part of
the diamond. I thus obtain a diamond-holder of one piece of metal in which
the diamond is held perfectly fast without any chance of working loose or becoming
unseated.

page_text: 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 method of mounting diamonds for drills or cutters consisting in mounting or
inserting that part of the diamond, which is to be used as the working part thereof,
in the bottom of a suitably formed mould, into which a suitable metal in fusion
(preferably cast iron) is introduced so as to enclose all the parts of the diamond
which are not inserted as specified in the bottom of the mould or form.
...
Dated this 1st day of April 1892.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.
i......