Improvements in Power-hammers.
Year: 1899

page_text: Improvements in Power-hammers.
I, HENRI GUYOT, of La Souterraine Department of Creuse, in the Republic
f France, Mechanician, do hereby declare the nature of this invention to be
s follows:-
-
The double power-hammer which forms the subject of the present application
onsists of a base or socle having upon its upper face two grooves for the
eception of the steel blocks which serve as anvils.
The said base is surmounted by a crown in the form of a horse shoe which
supports the upper part of the machine.
serve
to operate an
The upper part of the hammer comprises two uprights formed at their
upper end with two arms between which are mounted three pulleys the outside
ones of which are fast on the shaft while the middle one is loose thereon.
eccentric ; or by a
The fast pulleys each
special manner of keying a single pulley may be used for simultaneously
operating the two eccentrics; this arrangement will be hereinafter more fully
described. To each eccentric is articulated a rod adapted to be adjusted as to
its length and provided with a spring in order to increase the power of the
stroke of the hammer heads.
These hammer-heads are guided by triangular guide bars fixed to the uprights
of the machine and to two other uprights rigidly connected with the former
by cross-bars.
The hammer heads are arranged in the same vertical plane with the recesses
of the base or socle.
The special arrangement for simultaneously driving the two eccentrics by
means of a single pulley is as follows:
19
The horizontal shaft carrying the pulleys is formed in two parts, one
plain and the other is hollow and receives the plain part. These two parts, male
and female are formed with grooves in which is fitted a feather or key by
means of which the two parts of the shaft may be rigidly connected together.
In order to facilitate the displacement of the feather or key this latter is
fixed to a ring adapted to be moved endwise on the shaft through the inter-
vention of a pivoted lever operated by hand by means of a rod and lever.
The displacement of the shifting-fork for shifting the belts is effected by a
sliding bar which is moved sideways through the intervention of a bell-crank
lever and suitable actuating lever.
With this arrangement of belt driving it is possible to operate any one of the
fast pulleys and consequently one or other of the hammers as may be desired;
and moreover owing to the arrangement of the movable feather or key it is

page_text: possible also to operate both hammers simultaneously the belt being placed
upon either of the fast pulleys.
Do this 4th day of Decembar 1900
HASELTINE LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.
Improvements in Power-hammers.
1, HENRI GUYOT, of La Souterraine Department of Creuse, in the Republic
of France, Mechanician, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement: —
This invention relates to power hammers and in order that my invention
may be readily understood and carried into effect 1 will describe the same
fully with reference to the accompanying drawings in which
Figure 1 is a front elevation and
Figure 2 a side elevation of an improved hammer embodying my invention.
Figures 3, 4 and 5 illustrate the means hereinafter referred to for simul-
taneously actuating the two eccentrics by means of a single pulley.
According to this invention my improved power hammer consists of a base a
upon the upper face of which are two grooves b intended for the reception of
steel blocks serving as anvils (Figure 1). The base serves also as a support for
a horse-shoe shaped part c which supports the upper portion of the machine as
shewn in Figure 2.
The upper portion comprises two uprights d d forming two arms at the top
in such a manner as to embrace three pulleys, of which the two lateral pulleys e e¹
are fixed whilst the central pulley f is loose. Each of the fixed pulleys serves
to actuate the eccentrics g g or by means of a special engaging device one of
these fixed pulleys is able to actuate the two eccentrics simultaneously. This
device is hereinafter described.
To each eccentric g g is pivoted a rod h h adjustable as to length and con-
tinued by a spring in order to increase the force of the fall of the corresponding
hammer i or ¹.
The hammers
are guided by means of triangular strips j fixed to the
uprights and to two uprights which are fixed to the said hammers
by means of cross-pieces k."
l
The hammers are arranged in the same vertical plane as the grooves b.
The special device for simultaneously actuating the two eccentrics by means
of a single pulley is shewn in Figures 3, 4 and 5 and is as follows:--the shaft
carrying the pulleys is formed in two portions, one portion being solid whilst
the other portion is hollow and is adapted to receive the solid portion. The
male and female portions and are provided externally with grooves m and m¹
respectively in which a key is adapted to engage in such a manner as to
render the two portions of the shaft rigid one with the other. In order to
facilitate the displacement of the key, either for engagement or disengagement,
said key is fixed to a ring o which is displaced in the desired direction by
means of a suitable lever p pivoted at 21 (Figure 1) and operated by hand by
means of a rod q and a lever g¹.
The displacement of the belt fork r is effected by means of a slotted bar
is capable of displacement by means of a lever s, 'a rod s¹ and a lever t.
which

page_text: By means of this belt changing device either one of the fixed pulleys may
be caused to rotate at will and one or other of the hammers operated in conse-
quence; by means of the key n the two hammers may be caused to operate simul-
taneously, the belt being placed upon either one of the fixed pulleys.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:
A power hammer in which each hammer may be operated separately by belt
gearing or simultaneously by the combination of the belt gearing with a special
engaging device in which the shaft consists of two portions adapted to be ren-
dered rigid one with the other by means of a key substantially as described
and illustrated by the accompanying drawings.
HASELTINE LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.