Improvements in the Mechanism of Power Driven Hammers.
Year: 1895

page_text: Date of Application, 19th Oct., 1895
Complete Specification Left, 19th Aug., 1896-Accepted, 19th Sept.,
1896
PROVISIONAL SPECIFICATION.
Improvements in the Mechanism of Power Driven Hammers.
We, ENOCH SKINNER, and HENRY JOHNSON, both of The Fork Works,
Ranskill, in the County of Nottingham, Manufacturers, do hereby declare the
nature of our invention to be as follows :-
This invention relates to improvements in the mechanism of power driven
hammers, and moro especially to that part which carries, and imparts motion, to
the tup.
There is always a heavy amount of wear and tear upon the part (whatever may
be its construction) which communicates the vertical rociprocating action to the
tup, and very many devices have been tried with various degrees of success.
Wo
propose to interpose between the crank pin of the driving shaft and the tup
which is situated below the crank, an arched laminated spring of
any desirablo
number of plates, (but this forms no part of the invention) the ends of the outer
plates of the spring are recessed or hollowed transversely to receive the corre
spondingly shaped end links of a obain-connection, to the centre of which the tup
is connected.
i
This chain-connection preferably consists of a centre bar, to which the tup is
secured by means of a cross strap and bolts, or by other suitable means, and of
side links and connecting cross bars, the outer ones being made to fit into the
grooved ends of the springs before described.
One of the end cross bars is made adjustable, its two end links being screw
tbreaded and provided with nuts, and passing through holes in the said cross bar.
By this arrangement we obtain a very strong and durable piece of mechanisia
that will readily lend itself to the required action of the spring and tup.
Dated the 17th day of October 1805
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicants.
COMPLETE SPECIFICATION.
Improvements in the Mechanism of Power Driven Hammers.
We ENOOH SKINNER and HENRY JOHNSON both of The Fork Works,
Ranskill in the County of Nottingham Manufacturers do hereby declare the
nature of this invention and in what manner the same has to be performed, to be
particularly described and ascertained in and by the following statement :-
This invention relates to improvements in the mechanism of power driven
hammers, and more especially to that part which is interposed between the crank
pin of the driving shaft and the tup.
There is always a heavy amount of wear and tear upon the part which
communicates the vertical reciprocating action to the tup, and many devices have
been tried with various degrees of success, such as a leather strap in combination
with a curved laminated spring aud the like.

page_text: Our invention is illustrated in the annexed drawings of which:
Fig. 1, is an elevation of our improved device with the tup or hammer head.
Fig. 2, plan of the chain and tup.
Fig. 3, plan of a chain made of plates and bolts.
In carrying out our invention, we interpose between the crank pin, crank or
other part of hammer mechanism which is intended to give motion to the tup, an
arched laminated spring S, having any number of plates suitable to the size of the
hammer, but to which in itself we lay no claim such a spring having been used
for like purposes.
The ends of the outer spring plate, or back plate, are curved at A, or otherwise
made hollow transversely, to receive a correspondingly curved bar or link piece B,
of a chain-conuection C, to which the tup T, is connected in a central position
as shown in Fig. 1.
This chain-connection preferably consists of a centro pin P, to which the tup T,
is directly secured, or by means of an interposed tup holder H.
The end links L, of the chain, pass through the link piece B, and its ends are
scrow threaded to receive adjusting nuts N, by means of which various degrees of
tension may be put upon the spring S; if preferred one end only may be made
adjustable.
By the combination with an arched spring, of a chain as described, we obtain a
very durable piece of mechanisin, and one that will lend itself to the required
action of the spring and the tup, with the least possible wear.
Justead of the double end links L, and the link piece, B, we may use a single
shanked link passed through a hole in the ends of the outer spring plate, and
provided with round-faced washers to give to the action of the spring.
We also use a modification of chain as shown in Fig. 3, in which the links are
made of plates D, held together by bolts, but wo prefer the, arrangement of Fig. 1.
Having now particularly described, and ascertained the nature of our inven-
tion, and in what manner the same is to be performed we declare that what we
claim, is:
1. The improvements in the mechanism of power driven hammers as hereinbefore
described and set forth, with reference to Figs. 1. 2. 3 of the annexed drawings.
2. In combination with a power driven hämmer, an arched laminated spring S,
having its ends connected to the adjustable end links of a chain, the centre part of
which is attached to the tup or tup holder, as herein beforo described and shown.
3. In a power driven hammer, the combination of an arched laminated spring,
with a chain, connected with the tup for the purpose specified, substantially as
bereinbefore described and shown
Date L
Dated the
9th day of August 1800.
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicants.