IMPROVEMENTS IN FORGE HAMMERS
Year: 1853

page_text: F
LETTERS PATENT to Nicolas Victor Guibert, of Paris, France, and
of 4, South Street, Finsbury, London, Practical Engineer, for the
Invention of "IMPROVEMENTS IN FORGE HAMMERS."
Sealed the 9th June 1854, and dated the 10th December 1853.
PROVISIONAL SPECIFICATION left by the said Nicolas Victor
Guibert at the Office of the Commissioners of Patents, with his
Petition, on the 10th December 1853.
I, NICOLAS VICTOR GUIBERT, of Paris, France, and of 4, South
5 Street, Finsbury, London, Practical Engineer, do hereby declare the
nature of the Invention for "IMPROVEMENTS IN FORGE HAMMERS" to be
as follows:-
My Invention consists in putting in motion a vertical forge hammer
by means of two pullies placed in contact with each other, and in giving
0 to the edge of the said hammer, when falling, its required position.
C.
Reference being had to the Drawing, and to the letters and figures
marked thereon.
The annexed Drawing represents two views of the hammer. Figure 1

page_text: is a side elevation; and Figure 2, a back view. T, T, T, is the cast
iron frame or support of the apparatus; A, the hammer; Q, tho anvil;
E, is the main shaft, receiving a rotary motion from any suitable
power. The wheel or pulley F is keyed fast on the shaft E, and the
pulley G, is moveable on the same shaft. A system of combined and
bent levers L, V, moved by hand, brings the moveable pulley G in con-
tact with the fixed pulley F, which drives with it in its rotary motion.
A strap or chain B, B, is attached to the pulley G, at one end, and has
its other end passing over the top pulley C, before being attached to the
hammer A. When the hand lever V is made to operate, the pulley G
revolves, and the strap or chain B, B, coils round it; this movement
raises the hammer, which will fall down to strike the anvil as soon as
the action on V ceases, because the contact between the faces of F and
G is interrupted; a spiral spring fitted on the shaft E, between these
two pullies, causes the pulley G to recede. The course of the hammer A
is determined by the more or less repeated pressure of the levers L, V.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Nicolas Victor Guibert in the Great Seal Patent
Office on the 10th June 1854.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I,
NICOLAS VICTOR GUIBERT, of Paris, France, and of 4, South Street,
Finsbury, London, Practical Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Tenth day of December, in the
year of our Lord One thousand eight hundred and fifty-three, in
the seventeenth year of Her reign, did, for Herself, Her heirs and
successors, give and grant unto me, the said Nicolas Victor Guibert,
Her special license that I, the said Nicolas Victor Guibert, my execu-
tors, administrators, and assigns, or such others as I, the said Nicolas
Victor Guibert, my executors, adininistrators, and assigns, should at
any time agree with, and no others, from time to time and at all times
thereafter during the term therein expressed, should and lawfully might

page_text: make, use, exercise, and vend, within the United Kingdom of Great
Britain and Ireland, the Channel Islands, and Isle of Man, an Invention
for "IMPROVEMENTS IN FORGE HAMMERS," upon the condition (amongst
others) that I, the said Nicolas Victor Guibert, by an instrument in
writing under my hand and seal, should particularly describe and ascer-
tain the nature of the said Invention, and in what manner the same
was to be performed, and cause the same to be filed'in the Great Seal
Patent Office within six calendar months next and immediately after
the date of the said Letters Patent.
NOW KNOW YE, that I, the said Nicolas Victor Guibert, do
hereby declare the nature of my said Invention, and in what manner
the same is to be performed, to be particularly described and ascer-
tained in and by the following statement thereof, reference being had
to tho Drawing hereto annexed, and to the figures and letters marked
thereon, that is to say :-
My Invention consists in mechanical arrangements for working and
directing vertical forge hammers, part of which arrangements are appli-
cable to working steam hammers. The annexed Drawing represer's
several views of the mechanism. The same letters of reference in each
of the Figures represent similar parts.
Figure 1, is a side elevation. Figure 2, front view through X, Z,
Figure 5. Figure 3, a vertical section through O, U, of Figure 5,
showing an elevation of the pulleys F and G. Figure 4, friction pulley.
Figure 5, plan through S, I, Figure 1. Figure 6, details, partly in
section, of the pulleys set up on their shaft with the mechanism in con-
nection fixed to a frame D, D, by bolts b, b. Figuro 7, partial section
of a modified form of friction pulleys. Figure 8, a front view of part
of the frame.
Figures 1 and 2 shew the vertical cylinder or hammer A, raised
about one third of its stroke above the anvil Q, and held in that posi-
tion by the stop R, entering the circular groove t. A pulley F, Figures
3 and 6, is keyed fast upon the shaft E, which is set in motion by any
moving power; a louse pulley G, is also set on the shaft E, and by the
action of a double lever L, V, and pieces g³, and h³, h¹, is brought in
contact with pulley F; it will carry the pulley G, along in its revolving

page_text: motion, until the pressure ceases on the lever L, V, when the pulley G
..returns to its primitive position. A leather strap: B, B, Figure 1,
passing over the pulley C is made fast at one end to the loose pulley G,
and at the other end to the hammer A. Instead of a leather strap.a
metallic chain or rope may be employed, in which case the groove in the
upper pulley C, would have to be disposed accordingly to receive it, as
also the connecting point of the loose pulley G.
When the two pulleys G and F are put in motion, the strap B, B,
winds round G, in the direction shewn by the arrow F, which lifts-the
hammer A from the anvil Q, 'the whole or only part of the length of
its stroke, as required. By this action tho stop R is brought to R',
Figure 2; when the lever L; V, being replaced in its former position the
contact. between the pulleys F and G is broken, and the hammer falls
down on the anvil Q partly by its own weight and partly by the dis-
tending effect of the india-rubber bands a', a', a³, a', Figures 1 and 2.
The lever being again put in motion will cause the hammer to rise and
fall alternately, the heaviness of the stroke being proportionate to the
length of time during which the levers L, V, are raised.:..
The frame T, T, Figures 1, 2, and 3, may be of cast iron or wood;
and is adapted to a brickwork or timber platform by screw bolts b, b,
b, b. I, Figures 1; 2; and 5, is a toothed collar for guiding the ham-
mer in its action. The direction of the hammer may be changed by
an endless screw m, gearing with the toothed part of the collar, and set
in motion by means of a pulley P' fixed on the axis of the scrow, the
collar causing the hammer to follow its rotative motion by means of a
groove, Figuro 5, and tongue.r, Figure 2, adapted through the
length of the upper part of the hammer. R³, R³, Figure 1, caout-
chouc bands, serving as springs, which wind round the pulley G,
when the hammer falls down, and serve to stop the motion of the
pulley when the hammer is down; a metallic band might be used
in place of caoutchouc. X, Figure 6, spiral spring to prevent the
pulleys G. and F, rubbing against each other when the hammer has
ceased working. y, y, fulcrum made with a screw thread, and provided
with two screw nuts for regulating the distance of the pulleys F, G,
from the lever L, V...G, G, wooden or metallic pulley, provided inter-

page_text: nally with a cast iron friction box o, o, and externally with iron hoops
a, a, a, a, to strengthen it; trapezoid wooden dovetailed pegs q, q, q, q,
are set on one side of both pulleys so as to be easily removed, as seen
in Figure 4. n, n', a reversed funnel for supplying oil to the axle of
the pulley G, its form preventing the oil from falling between the
pulleys G, and F. h', h', Figures 3 and 6, a forked piece bearing
against the pulley G, when pressed by the lever L, V, by means of the
iron rods g'. The hammer may be as heavy as required. For ham-
mers of great weight the pegs of the pullies G, F, should project so as
to catch into each other. The collar and endless screw may likewise
be employed for changing the position of the fall of ordinary steam
hammers.
And having now described the nature of my said Invention, and the
manner of carrying the same into effect, I wish it to be understood
that I do not restrict myself to the precise details herein laid down;
but what I claim is,―
First, the mechanical arrangements for working vertical forge ham-
mers, as herein-before described and referred to in the Figures of the
Drawing.
Secondly, the construction of contact pullics and their application to
working vertical forge hammers, as herein-before described and referred
to in Figures 1, 3, 4, 6, and 7.
Thirdly, the directing the fall of forge hammers by means of a
toothed collar and endless screw, as herein-before described and
referred to in Figures 1, 2, and 5.
Fourthly, the application of an endless screw and toothed collar for
directing the fall of steam hammers.
In witness whereof, I, the said Nicolas Victor Guibert, have
hereunto set my hand and seal, this Third day of June, in the
year of our Lord One thousand eight hundred and fifty-four.
+ ATTRA
N. V. GUIBERT. (L.D.)