Improvements in Tool-holders for Machine-tools.
Year: 1890

page_text: Date of Application, 22nd Feb., 1890
Complete Specification Left, 18th Nov., 1890-Accepted, 20th Dec., 1890
PROVISIONAL SPECIFICATION.
[Communicated from abroad by J. GARNIER, of Laeken, in the Kingdom of Belgium,
Mechanician, and ADRIEN WEIL. of Marly (lez Valenciennes), in the Republic
of France, Manufacturer.]
Improvements in Tool-holders for Machine-tools.
I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co., Patent Agents,
Southampton Buildings, in the County of Middlesex, do hereby declare the nature of
this invention to be as follows:-
This invention relates to tool-holders for machine-tools.
The tool-holder constructed according to this invention comprises a bar provided
at one of its extremities with a hole of special form. Into this hole are inserted two
pieces of similar shape, which, through the medium of screws are forced against two
tools which are preferably made triangular in transverse section, and are placed in the
said hole. The special form of the above-mentioned pieces and boles has for its object
to enable the tool to swing from the right to the left hand side and vice versa,
according as the slide rest of the machine-tool is to move in one or the other
direction.
At the other extremity of the aforesaid bar is formed a lozenge-shaped hole into
which are inserted two tools which are triangular in transverse section and are hell
in their place through the medium of a bolt, the lower part of whose head presses
against the surface of one of the tools when the nut is screwed home. The special
form employed in this case is designed to permit the said tools, when being for
boring, to slide upon each other in such a manner that the cutting edges at their
extremities shall be at a distance from each other which corresponds to the internal
diameter which the article to be bored shall have after the operation. This arrangement
has the advantage of enabling the same tools to be used for boring holes of any
diameter.
When the tool-holder is to be employed in a planing machine a tool is placed
between jaws made of special internal form and provided with depressions for the
reception of connecting pins; these pins are inserted when the jaws are put together,
whereupon the holder is placed on the slide rest of the machine-tool.
It will be understood that this improved tool-holder can also be employed for tools
of round, trapezoidal and other suitable shapes.
The improved tool-holders may be provided with only one of the above described
means for securing the tools therein.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Tool-holders for Machine-tools.
I, HENRY HARRIS LAKE, of the firm of Haseltine Lake & Co., Patent Agents,
45 Southampton Buildings, in the County of Middlesex, 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 :-
This invention relates to tool-holders for machine-tools and is illustrated in the
accompanying drawings the figures of which are hereinafter referred to.
The tool-holder constructed according to this invention comprises a bar A provided
at one of its extremities with a hole of the form more clearly indicated in Figure 5.
[ Price 6d 1

page_text: Into this hole are inserted two pieces d d Figures 1 and 2 of similar shape which,
through the medium of screws g, g, are forced against two tools ff which are
preferably made triangular in transverse section, and are placed in the spaces e e of
the said hole.
The special form of the above-mentioned pieces d d and holes has for its object to
enable the tool to swing from the right to the left hand side and vice versa according
as the slide rest of the machine-tool is to move in one or the other direction.
At the other extremity of the aforesaid bar A is formed a lozenge-shaped hole e¹,
into which are inserted two tools a and b of steel which are triangular in transverse
section and are held in their place through the medium of a bolt c the lower part of
whose head c presses against the surface of one of the tools as shown in Figure 2
when the nut is screwed home.
The special form employed in this case is designed to permit the said tools a and b,
when being used for boring, to slide upon each other in such a manner that the
cutting edges at their extremities shall be at a distance from each other which
corresponds to the internal diameter which the article to be bored shall have after the
operation.
This arrangement has the advantage of enabling the same tools to be used for
boring holes of any diameter.
When the tool-holder is to be employed in a planing machine a tool jis placed
between jaws hi made of special internal form as shown in Figures 3 and 4 and
provided with depressions for the reception of connecting pins K. These pins are
inserted in the depressions when the jaws hi are put together and the holder is then
placed in the slide rest of the machine.
It will be understood that this improved tool holder can also be employed for tools
of round, trapezoidal and other suitable shapes.
The improved tool holders may if desired be provided with only one of the above-
described means for securing the tools therein.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed as communicated to me by my
foreign correspondents I declare that what I claim is :-
First. The tool holder constructed as represented in Figures 1, 2, 5 and 6 as and
for the purpose above specified.
Second. A tool holder constructed substantially as shown at the left hand extremity
of the bar A, Figures 1 and 2, for the purpose specified.
Third. A tool holder constructed substantially as shown at the right hand extremity
of the bar A, Figures 1 and 2, for the purpose specified.
Fourth. The arrangement of the jaws h and
Figures 3 and 4, with the object of
enabling the use of the tool more especially in planing machines.
Dated this 18th day of November 1890.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.