Improvements in Rivetting Tools.
Year: 1899

page_text: Date of Application, List July, 1899
Complete Specification Laft 6th Apr 1900-Accepted 19th May 1900
Date of Application, 1st July, 1889
Complete Specification Laft 6th Apr 1900-Accepted 19th May 1900
Improvements in Rivetting Tools.
We, JOHN BOULTBEE BROOKS, Managing Director, and JOIN HOLT, Works
Manager, both of Criterion Works, Great Charles Street, in the City of Birming-
ham, do hereby declare the nature of this invention to be as follows:-
-
This invention has relation to rivetting tools and has for its object, to provide
means whereby the end of the rivet may be localized to determine whether it is
in a true vertical line with the punch before the latter makes its rivetting stroke,
and this we propose to accomplish by making the punch act both as a rivet finder
or gauge and as a rivetting tool.
According to one form of our invention, as applied to rivetting leather and like
work the tool consists of three primary parts, viz., a vertically sliding hollow body
having formed with and directed axially from its lower end, a sleeve or hollow
punch adapted to come upon the leather or other material surrounding the hole
into which the top of the rivet to be headed is passed, thus pressing down and
consolidating the leather and exposing the rivet tip to the action of the rivet-
ting punch, which constitutes the second part of the tool and is loosely fitted in
such a manner as to admit of freely sliding within the hollow of the fetching-up
or pressing-together sleeve-punch and the hollow body part aforesaid, whilst its
upper end is adapted to impinge against an upper abutment end of an axial
hole formed. in a carrier or stem, which comprises the third element of the tool
and is made fast to the press, with its lower end being telescoped by the open
upper part of the body, which has a slight vertical play upon the said stem, the
extent of which is limited by pins carried by the one part and taking through
slots in the other. A coiled spring is disposed between an abutment piece on the
punch or stem or on the end of the press slide and the top edge of the body for
the purpose of causing the sleeve punch to act in advance of the rivetting punch
and then yield when the whole of the pressure comes onto the rivetting punch by
the impingement of the inside of the hollow against the top or inner end of the
said rivetting punch, which has a finger lift extending through coinciding slots
in both the stem and the body to admit of the operative giving a vertical move-
ment to the punch within its guides for applying the lower or finder end of it to
the opposed end of the rivet, prior to the full rivetting pressure being exercised.
and applied to the rivet on the descent of the tool bodily with the press slide or
forcing medium.
In another form of rivetting metallic material together we may dispense with
that part of the tool which fetches up or compresses together the parts before
rivetting.
7000
JOHN BOULTBEE BROOKS.
JOHN HOLT.
By Henry Skerrett,
Agent for Applicants.

page_text: Improvements in Rivetting Tools.
We, JOHN BOULTBEE BROOKS, Managing Director, and JOHN HOLT, Works
Manager, both of Criterion Works, Great Charles Street, in the City of Birming-
ham, 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 has relation to rivetting tools and has for its principal object,
to provide means whereby the end of the rivet may be localized to determine
whether it is in a true vertical line with the punch before the latter makes its
rivetting stroke, and this we propose to accomplish by making the punch act both
as a rivet finder or gauge and as a rivetting tool.
Figure 1 of the accompanying drawings represents a front elevation of a rivet-
ting tool constructed and arranged according to our improvements, the parts
being shown in the positions they assume before the tool makes its rivetting stroke,
but with the end of the punch set to the rivet to be headed,
Figure 2 is a vertical section of the said tool, upon the same scale and with
the parts in the same positions as represented in Figure 1.
Figure 3 represents another section of the said tool but showing the several
parts in the positions which they respectively assume on the completion of the
rivetting stroke.
Figure 4 shows a further sectional view of the said tool, taken at right angles
to the sections represented in Figures 2 and 3, and showing the tool at the top
of its stroke and the parts placed ready for the introduction under it of a piece
of work to be rivetted.
Figure 5 represents, upon an enlarged scale, a similar section to that repre-
sented by Figure 3.
The same letters of reference indicate corresponding parts in the several figures
of the drawings.
According to this form of our invention which is particularly applicable for
rivetting leather and like work, the tool comprises three primary parts marked
respectively a, b and c, and consisting, first, of a vertically sliding hollow body a
having formed with, and directed axially from, its lower end, a sleeve or hollow
punch whose tip is adapted to come upon the leather or other material & sur-
rounding the hole into which the end e¹ of the rivet e to be headed is passed,
thus pressing down and consolidating the said leather and clearing or exposing
the rivet end to the action of the rivetting punch b, which constitutes the second
part of the tool and is loosely fitted in such a manner as to admit of its acting
end freely sliding within the hollow sleeve-punch a¹, whilst its upper end is
adapted to impinge against a stop or abutment formed by the top of an axial
hole in pummel f, of the slide f of a power or other press, into which said
hole, the wormed shank of a rigid tubular carrier or stem c, comprising the
third element of the tool is screwed, with its collar c¹, bearing against the under-
side of the said pummel f. The body of the rivetting punch works within the
inside of this carrier stem whose lower end telescopes into the open upper part
of the body a, which has an amount of vertical play upon the said stem, the
extent of which is limited by pins carried by the one part and taking through
slots a³ in the other. A coiled spring g is disposed between the collar c¹, of the
fixed stem or carrier and the top edge at of the hollow body for the purpose of
causing the sleeve punch to act in advance of the rivetting punch and then yield
after the whole of the pressure has come onto the rivetting punch by the impinge-

page_text: ment of the tool slide against its top or inner end. The said rivetting punch
has a finger lift 65, extending through coinciding slots a³, 5, in both the stem
and the body to admit of the operative giving a vertical movement to the punch
within its guides for applying or setting the lower or rivet-finder end of it to the
opposed tip of the rivet, prior to the rivetting pressure being exercised and
applied to the rivet on the descent of the tool bodily with the press slide.
Thus, assuming the parts of the tools are in the respective positions represented
in Figure 4, a piece of leather or like work to be rivetted is placed upon the
anvil of the press, with the rivet inserted into the coincident holes in the two
pieces to be connected, the rivetting punch being meanwhile kept in the raised
position by means of the finger lift. The operative then allows the rivetting
punch to fall and localize the rivet, as shown in Figures 1 and 2, to ensure that
the latter shall be in true vertical line with the punch before the stroke for
expanding the end of the rivet is made.
The press is now thrown into gear and the tool slide descends, and the sleeve
punch comes down onto the leather, when by the pressure transmitted from the
tool slide to the hollow body a through the medium of the interposed spring,
the leather surrounding the shank of the rivet is pressed down and consolidated,
and cleared from the tip to be expanded. Then as soon as the pummel of the
tool-slide impinges against the top of the rivetting punch (see Figures 3 and 5)
the latter is forced home and the metal at the exposed end of the rivet is expanded
into a head. On the return of the tool slide, the rivetting punch is left behind
and is raised by the operative through the medium of the finger lift to permit
of the work being removed from the press.
In another form of tool adapted for rivetting metal work, the sleeve punch for
compacting and clearing the surrounding material from the rivet may be dispensed
with, in which case, the tool consists only of a hollow stem or carrier and a ver-
tically sliding rivetting punch.
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:-
First: A rivetting tool, comprising a fixed carrier, and a sliding punch having
a range of independent movement relative to the said carrier, to admit of the
said punch being set to the end of the rivet to be expanded in order to localize
the latter in advance of the rivetting stroke, which compels both the carrier and
the punch to move bodily together by the abutment of the one part against the
other.
Secondly-A rivetting tool, comprising a fixed carrier and a sliding rivetting
Lunch, the latter having a range of independent movement to admit of it being
set to the end of the rivet to be expanded in advance of the rivetting stroke, in
combination with a supplementary sleeve punch, surrounding the said rivetting
punch and operated by spring pressure so as to compress the material surround-
ing the rivet end and clear the same before the tool is caused to make its rivet-
ting stroke by the abutment of the fixed carrier against the sliding punch, sub-
stantially as herein described and also as set forth in the accompanying drawings.
JOHN BOULTER BROOKS.
JOHN HOLT.
By Henry Skerrett,
24, Temple Row, Birmingham, Agent for Applicants.