Improved Tool Holder for metal-sorting matan
Year: 1898

page_text: Date of Application, 1st Jan., 1898
Complete Specification Left; 1st Oct., 1898-Accepted, 10th Dec., 1898
Improved Tool Holder for metal-sorting matan
We, WILLIAM THOMAS SMITH and WALTER SLINGSBY, both of the firm of
William T. Smith and Co. Ltd., of Marsden Road Works, Bolton, in the County
of Lancaster, Engineers, do hereby declare the nature of this invention to be as
follows, that is to say:-
and
consists
It relates to tool holders for metal slotting machines
in constructing these in such a manner that their production is greatly.
facilitated while they are enabled to hold the tools firmly and rigidly during
their cutting operations and yet allow them to recede from their work during their
return strokes with the advantages incident thereto.
To attain the object of our invention we construct the holders in two parts, one
part for attachment to the machines' operating part, the other part which receives
the tool, being made to slide within the former.
The part to which the tool is secured by screws or otherwise in the well-known
manner, we construct to have quadrant flanges or grooves (or these flanges or
grooves may be straight) on its outer sides to fit into or take over correspondingly
formed grooves or flanges made in the arms of the other part which spans it, while
we mount a retracting spring on said fixed part to bring the tool-holding part when
free into a normal raised position, so that as the whole are moved downwards for
the tool to come into contact with its work the said tool is firmly held to perform
ail the functions desired of it but on its return stroke its pressure against its work
causes it to move its quadrant (or like) holder in its bearings and against the force
of the spring until it has been raised or moved clear of said work, on which it is
free and said spring raises it in its bearings to be rigidly held on repeating its
down stroke.
By forming the parts with quadrant flanges and slots as above described we are
enabled to produce them by mounting several pieces at one and the same time on
the face plate of a lathe, thus the sliding and quadrant surfaces may be readily
and cheaply produced and one part may be made to accurately fit the other. When
the parts have straight flanges and grooves these may be finished by any straight
cutting machinery such as a planing or milling machine.
3
Danamhon 1807

page_text: County of Lancaster, Engineers, 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, that is to say:
-
It relates to tool holders for metal-slotting machines and consists
in constructing these in such a manner that their production is greatly
facilitated while they are enabled to hold the tools firmly and rigidly during
their cutting operations and yet allow them to recede from their work during their
return strokes with the advantages incident thereto.
In order that this invention may be readily understood, we have hereunto
appended sheets of drawings illustrative thereof, in which:-
Fig. 1 is a sectional elevation of a tool holder and its operating part constructed
in accordance with our invention.
Fig. 2 is a view of parts illustrated by Fig. 1 and as seen from above.
Fig. 3 illustrates our improved tool holder in end elevation.
Fig. 4 is a plan view of parts shown by Fig. 3 but with the cap or cover
removed.
Figs. 5 and 6 are drawings in detail hereinafter referred to.
To attain the object of our invention we construct the holders in two parts a
and b, one part a for attachment to the machine's operating part e, the other part b,
which receives the tool d, being made to slide within the former.
The part b, to which the tool d is secured by screws e or otherwise in the well
known manner, we construct to have flanges 61 of quadrant shape on its outer sides
to fit into correspondingly formed grooves a¹ made in the arms a² a³ of the part a (or
these flanges and grooves may be transposed) while we mount a retracting spring f
on the cap or cover g, which is attached to the fixed part a by screws or other means
as shown in broken lines, Fig. 3, to bring the part when free into a normal raised
position against the cap or cover 7 as illustrated by Fig. 1, so that as the whole are
inoved downwards for the tool d to come into contact with its work the said tool d
is firmly held to perform all the functions desired of it, but on its return stroke its
pressure against its work causes it to move its holder 6 in its quadrant shaped
bearings and against the force of the spring f until it has been raised or moved
clear of said work, on which it is free, and said spring fraises it in its bearings to
be rigidly held on repeating its downward strokes.
Instead of forming the flanges and grooves on the parts a and b to be of quadrant
shape, they may be formed straight as shown in broken lines at a Fig. 6.
By forming the parts with quadrant flanges and slots as above described, we are
enabled to produce them by mounting several pieces at one and the same time on
the face plate of a lathe, thus the sliding and quadrant surfaces may be readily and
cheaply produced and one part may be made to accurately fit the other.
When the parts a and b have straight flanges and grooves these may be finished
by any straight cutting machinery such as a planing or milling machine.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is :-
A tool holder for metal-slotting-machines the same being constructed and
arranged to operate substantially as herein specified.