A Portable Rivetting Machine.
Year: 1890

page_text: Date of Application, 8th Oct., 1890
Complete Specification Left, 23rd June, 1891-Accepted, 25th July, 1891
PROVISIONAL SPECIFICATION.
A Portable Rivetting Machine.
I, CLAUDE KENNEDY MILLS, of 23 Southampton Buildings, in the County of
Middlesex, Patent Agent, do hereby declare the nature of this invention, a com-
munication to me from abroad by Jean Baptiste Courtet of Romans (Drôme) in
the Republic of France. Builder, to be as follows:
-
The rivetting machine constituting the subject of the present application is
intended to replace economically and advantageously the hydraulic rivetting
machines, in bridge work and in iron constructions.
It is based upon this remark, that the effort to be exercised which is very slight
at the commencement of the rivetting when the rivet is long and hot, increases very
rapidly in proportion as the rivet is formed, and attains its maximum intensity when
the head is nearly formed and the rivet is cooled.
If a constant motive force is employed such as the muscular power of man, it will
be advantageous to transmit it to the rivetting punch by the intervention of a
mechanism whose power increases in proportion as the speed diminishes. By these
means the maximum necessary effort will be obtained at the end of the operation,
and at the cominencement a relatively sufficient speed to prevent the rivet from
cooling during the work.
This result is obtained by applying to the working of the rivetting punch, an
arrangement of toggle-joint already employed in printing and other presses but
whose application to rivetting machines is new and gives undoubted advantages,
as much from the point of simplicity, and lightness of the apparatus, as from that of
rapidity and perfection of the work..
The accompanying drawing represents this novel application. The toggle joint
consists of four connecting rods or links c, e forming an articulated lozenge, the
upper articulation E is fixed on a prolongation H of the framing above-and on the
axis of the rivetting punch A, the lower articulation D is fixed to the slide B which
carries the rivetting punch.
The two other articulations F F carry nuts threaded in opposite directions and
traversed by a screw which carries at each end a hand wheel G.
The anvil I is screwed into the framing and is fixed by a lock nut J at a con-
venient height according to the thickness of the work to be rivetted.
It is known that the effect of this toggle joint is to cause the effort exercised at
its base to increase proportionally to the tangent of the angle formed by the con-
necting rods or links with the screw, further this tangent increases rapidly when
the connecting rods or links approach the vertical and attain the utmost at the
moment when they are completely straightened, the anvil I can therefore be
regulated in such manner that the end of the stroke of the rivetting die A. shall
correspond with an inclination of the connecting rods or links capable of producing
the necessary effort for good rivetting, with the constant effort applied to
the screw.
The apparatus represented in the drawing is intended to be worked by hand, it
is portable and can be suspended by rings L, L, like hydraulic rivetting machines.
It has over these latter the following advantages.
1st. A rapid motion at the commencement of the operation, thereby preventing
the cooling of the rivet.
2nd. An energetic pressure at the end only of the operation when it becomes
necessary.
3rd. The suppression of pumps accumulators and conducting pipes.

page_text: The invention is applicable to all classes of rivetting machines whether fixed or
portable and whether operated by hand or by power.
The screw represented in the drawing as in the plane of the framing, may be
perpendicular to such plánc, in order to remain horizontal when the apparatus is
suspended by the back.
The prolongation may also be pivotted around its axis so as to enable
the screw and hand wheels to be placed at will in the direction most suitable
for the work.
1
ليم
2000
A Portable Rivetting Machine.
I, CLAUDE KENNEDY MILLS, of 23 Southampton Buildings, in the County of
Middlesex, Patent Agent, do hereby declare the nature of this invention, a com-
munication to me by Jean Baptiste Courtet, of Romans (Drôme) in the Republic
of France, Builder, and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :-
The rivetting machine constituting the subject of the present application is
intended to replace economically and advantageously the hydraulic rivetting
machines in bridge work and in iron constructions.
It is based upon this remark, that the effort to be exercised, which is very slight
at the commencement of the rivetting when the rivet is long and hot, increases
rapidly in proportion as the rivet is formed, and attains its maximum intensity
when the head is nearly formed and the rivet is cooled.
If a constant motive force is employed, such as the muscular power of man, it
will be advantageous to transmit it to the rivetting punch by the intervention of
a mechanism whose power increases in proportion as the speed diminishes.
By these means the maximum necessary effort will be obtained at the end of
the operation, and at the commencement a relatively sufficient speed to prevent the
rivet from cooling during the work.
This result is obtained by applying to the working of the rivetting punch, an
arrangement of toggle joint already employed in printing and other presses, but
whose application to rivetting machines is new and gives undoubted advantages, as
much from the point of simplicity and lightness of the apparatus, as from that of
rapidity and perfection of the work.
The drawing accompanying my Provisional Specification represents this novel
application. The toggle joint consists of four connecting rods or links c, c, forming
an articulated lozenge; the upper articulation E is fixed on a prolongation H of
the framing above and in the axis of the rivetting punch A; the lower articu-
lation D is fixed to the slide B, which carries the rivetting punch. The two other
articulations F, F, carry nuts threaded in opposite directions and traversed by a
screw, which carries at each end a hand wheel G.
The anvil is screwed into the framing and is fixed, by a lock nut J, at a
convenient height, according to the thickness of the work to be rivetted.
It is known that the effect of this toggle motion is to cause the effort
exercised at its base, to increase proportionally to the tangent of the angle formed
by the connecting rods or links with the screw; further, this tangent increases
rapidly when the connecting rods or links approach the vertical and attain the
utmost at the moment when they are completely straightened; the anvil I can
therefore be regulated in such manner that the end of the stroke of the rivetting
die A shall correspond with an inclination of the connecting rods or links capable

page_text: of producing the necessary effort for good rivetting, with the constant effort applied
to the screw.
The apparatus represented in the drawing is intended to be worked by hand, it
is portable, and can be suspended by rings L L, like hydraulic rivetting machines.
It has over these latter the following advantages.
1st. A rapid motion at the commencement of the operation, thereby preventing
the cooling of the rivet.
2nd. An energetic pressure at the end only of the operation, when it becomes
necessary.
3rd. The suppression of pumps, accumulators, and conducting pipes.
The invention is applicable to all classes of rivetting machines, whether fixed
or portable, and whether operated by hand or by power.
The screw represented in the drawing as in the plane of the framing, may be
perpendicular to such plane, in order to remain horizontal when the apparatus is
Suspended by the back. The prolongation H may also be pivotted around its
axis, so as to enable the screw and hand wheels to be placed at will in the direction
most suitable for the work.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:-
The application to rivetting machines, of a toggle movement, transforming a
constant effort and speed applied as the motor into an increasing effort and a
decreasing speed acting upon the rivetting punch substantially as herein shown and
described and for the purpose stated.
Danied this
T
1001
AKO LOIS INA▬UT LBC TOU
CLAUDE K. MILLS.
By Harris & Mills,
23, Southampton Buildings, London, W.C., Agents.