IMPROVEMENTS IN MACHINE HAMMERS
Year: 1881

page_text: LETTERS PATENT to Herbert John Haddan, of the Firm of Herbert and
Company, Solicitors of Patents, of 67, Strand, in the City of Westminster,
Civil Engineer, for an Invention of "IMPROVEMENTS IN MACHINE HAMMERS."
A communication from abroad by Alexander Beaudry, of Massachusetts,'
United States of America.
PROVISIONAL SPECIFICATION left by the said Herbert John Haddan at
the Office of the Commissioners of Patents on the 14th June 1881.
HERBERT JOHN HADDAN, of the Firm of Herbert and Company, Solicitors of
Patents, of 67, Strand, in the City of Westminster, Civil Engineer. "IMPROVEMENTS
IN MACHINE HAMMERS." A communication from abroad by Alexander Beaudry,
of Massachusetts, United States of America.
The improvements consist in the now combination of various parts, being the
frame and anvil, together with a reciprocating ram with springs actuated by a rod,
spring, rotary crank shaft, and connecting rod, with a screw threaded sleeve and
springs. Also the combination with the rotary crank-shaft of a fly-wheel, driving
pulley and treadle lever with rock-shaft and break, together with a loose binder
pulley. By imparting a rotary motion to the crauk-shaft, the connecting rod with
its accessories is set in an up and down motion, and the ram caused to ascend and
descend in rapid successions with a powerful and yielding stroke, and in such
manner that the ram will ascend immediately after the blow is given.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Herbert John Haddan in the Great Seal Patent Office on
the 9th December 1881.
HERBERT JOHN HADDAN, of the Firm of Herbert and Company, Solicitors of
Patents, of 67, Strand, in the City of Westminster, Civil Engineer. "IMPROVEMENTS
IN MACHINE-HAMMERS." A communication from abroad by Alexander Beaudry,
of Massachusetts, United States of America.
This Invention relates to improvements on upright belt-hammers, and it is
carried out as follows, reference being had to the accompanying Drawings, on
which Fig. 1 represents a plan view; Fig. 2 represents a side elevation; Fig. 3
represents a vertical longitudinal section; and Fig. 4 represents a horizontal cross-
section on the line A, B, shown on Fig. 2.
Similar letters refer to similar parts wherever they occur on the different parts of
the Drawings.
a, a, b, b, represent the frames of the machine, of which the upper portion a, a,
is bolted to the lower portion b, b, by means of suitable screw-bolts c, c, c, as shown.
By means of the holding down bolts d, d, d, the base of the frames is secured to a
suitable foundation e as usual, the latter being preferably made of wood; f is the
anvil, secured independently of the frames of the machine to the wooden foun-
dation e, by means of suitable holding down bolts g, g, g, as shown; f¹ is the dio
secured to the upper end of the anvil as usual; h is the up and down moveable
ram, having the die h³ in its lower end as shown; i, i, are vertical guides for the
ram h, which guides are secured to the forward ends of the frame a, a, by means of
fastening bolts h, k, and set screws k³, k³, as shown. The ram h is provided with a
vertical and central cylindrical recess 7, which is closed at the top by means of the
perforated plate or cover m secured to the top of the ram h by means of suitable
screws, as shown.
In the cylindrical recess is located a pair of coiled springs n and o, one above
and the other below the collar, nut or projection p¹ that is secured firmly to the
lower end of the rod p, which passes freely up through the perforated cover mas
shown. The upper end of the rod p is hinged to the forward end of the spring q
that extends backwards above the frames a, a, and is bent downwards to a U shape,
and secured in its bent end to the socket a' that is preferably cast in one piece with
the rear of the frame a, a; a", all, are set screws, by means of which the lower
bent end of the spring q is secured to the socket piece a¹; q¹, q', are strengthening
leaves, preferably located on the top and bottom of the lower bent end of the
spring q, and secured with the spring to tho socket a' by means of the aforesaid
set screws a¹¹, a". The object of the leaves q¹, q¹ is to prevent the spring q from
yielding too much at or near the place where it is secured to the frame a, a
About midway on the spring q between its forward and rear ends is secured the
coupling piece r by means of the set screw 71, as shown; q, q", are strengthening
leaves on top and bottom of the spring 9, which leaves q", 9", are clamped and
held in place by the coupling piece r and its set screw to prevent undue elasticity
of the spring g at the location of the coupling piece r; to the coupling piece is
hinged by means of the pin or bolt 11 the upper connecting rod piece 8, the lower
end of which is provided with a head or nut 8', and located within the sleeve t that
is screw threaded in its lower end for the reception of the screw threaded upper
end u of the lower connecting rod piece u; t is a hollow screw threaded cap screwed
in the upper end of the sleeve t, through which cap the connecting rod piece a is
allowed to move; v and v₁are coiled springs within the sleeve t, located respectively
above and below the head or nut s', as shown on Fig. 3. The lower end of the

page_text: connecting rod u is hinged to the crank w' on the crank shaft w, which is set in a
rotary motion in its bearings x, x, by means of belt power applied to the pulley y
secured to the shaft w; y' being a suitable belt carried from a rotary. pulley in the
usual manner; z is a balance wheel secured to one end of the rotary shaft w, as
shown; by means of the adjustable screw threaded sleeve t the connecting rod u
may be lengthened or shortened as may be desired to adjust the lift of the ram
above the anvil die for working the hammer on thick or thin forgings.
The coiled springs vand v' within the sleeve t servo to obtain the full elasticity
of the spring 9 when moved up and down by the crank w', and thus to obtain the
greatest effect on the ram with buoyancy, freedom of action and snap of the spring 9.
and to prevent its rigid connection to the crank shaft w.
1 is a rock-shaft located in bearings in the lower part of the frame b, b, and
provided with a suitable treadle lever 2, as shown; 3 is a lever having a brake 4 in
its upper end adapted to act against the balance wheel z, so as to stop the hammer
when the pressure on the treadle-lever 2 is removed at the same time as the loosely
rotating binder pulley 5, on the end of the lever 6, which is also attached to the
rock-shaft 1, is released from contact with the driving belt y¹, and thus slackens
said belt and brings the hammer to a stop, and it will so remain until the treadlo
lever 2 is again depressed, causing the brake 4 to be relieved from the balance
wheel, and tightening the belt y' by the binder pulley 5, by which means the
rotary motion is conveyed to the driving pulley y.
The operation of this improved belt hammer is as follows:-
By imparting a rotary motion to the crank shaft w, the connecting rod u, s, is
set in an up and down motion, and with it the spring q, and by means of the rod p,
its collar p, and the coiled springs n, o, the ram h is caused to ascend and descend
in rapid successions with a powerful and yielding stroke, and in such a manner,
that the ram will ascend immediately after the blow is given on the forging, this
being caused by the compression of the upper spring n during the descent of the
ram; the compression of the lower spring o during the latter part of the upward
stroke tends to increase the force of the blow of tho ram.
This improved hammer can be run without much frictional resistance, and
consequently with very little power as compared with other belt hammers now in
CLAIMS.
lat. The herein described improved belt hammer, consisting of the frame a, t,
anvil ff, the reciprocating ram h, h³, with its springs n, o, the rod p, p', spring q,
the rotary crank-shaft w, w, and connecting rod u, 8, for the purpose set forth.
2nd. In a belt hammer, the up and down moveable ram h, h', its connecting rod
p, p', and springs n, o, spring g, crank shaft w, w', and the adjustable connecting
rod u, s, with its screw threaded sleeve t, t, and springs v, v, as and for the
purpose set forth.
3rd. In a belt hammer, the combination with the rotary crank-shaft w, w¹, and
its fly-wheels, and driving pulley y, of the treadle-lever 2, rock shaft 1, brake
lever 3, 4, and the lever 6 with the loosely revolving binder pulley 5, as and for
the purpose set forth and described.
In witness whereof, I, the said Herbert John Haddan, have hereunto set
my hand and seal, this Twenty eighth day of November, A.D. 1881.
HADDAN 101