CERTAIN IMPROVEMENTS IN FORGE HAMMERS
Year: 1853

page_text: LETTERS PATENT to Thomas Kelley Hall, of Crewe, in the
County of Chester, Smith, for the Invention of "CERTAIN
IMPROVEMENTS IN FORGE HAMMERS."
Sealed the 17th January 1854, and dated the 11th August 1858.
PROVISIONAL SPECIFICATION left by the said Thomas Kelley
Hall at the Office of the Commissioners of Patents, with
his Petition, on the 11th August 1853.
Speci
I, THOMAS KELLEY HALL, of Crewe, in the County of Chester, Prov
Smith, do hereby declare the nature of the said Invention for
"CERTAIN IMPROVEMENTS IN FORGE HAMMERS" to be as follows:―
My Invention relates to a certain novel arrangement of me-
chanism for the purpose of raising the hammer to the required
height, and liberating the same so as to allow it to fall, such
apparatus being self-acting and capable of adjustment to any
required degree of weight and rapidity of acting.
The construction of the apparatus is as follows:-The framing
supports three transverse shafts. The first is the fly wheel or
driving shaft, and receives a constant rotatory motion by means of
a strap or belt passing round a pulley at one end thereof. The

page_text: second is a carrier or intermediate shaft; and the third is square,
and upon it is mounted the boss of a lever which carries the
hammer. These three shafts are coupled together by means of
friction rollers. The driving end of the intermediate shaft is
mounted in one end of a lever, and its friction roller is thus
capable of being thrown out of contact with the other two.
Upon the other arm of the said lever is an inclined plane, which
is capable of adjustment, and is acted upon by cam or finger
mounted upon
the hammer shaft. The action of the hammer is as
follows-As the driving shaft revolves it drives the intermediate
shaft, which in turn communicates motion to the hammer shaft,
and raises the hammer until the cam or finger thereon comes into
contact with the inclined plane. This raises the lever, thus
throwing the intermediate friction roller out of contact with the
other two, and allows the hammer to fall. The falling of the
hammer releases the inclined plane and throws the friction roller
into contact, thus raising the hammer as before.
The height to which the hammer is raised before being released,
and consequently the weight and rapidity of the blows, is regulated
by adjusting the inclined plane by means of a screw.
The weight of the hammer may, when desired, be increased by
means of a spring. The hammer is also capable of being traversed
laterally upon its squared shaft by means of a screw.
SPECIFICATION in pursuance of the conditions of the Letters
Patent, filed by the said Thomas Kelley Hall in the Great
Seal Patent Office, on the 11th February 1854.
TO ALL TO WHOM THESE PRESENTS SHALL COME,
I, THOMAS KELLEY HALL, of Crewe, in the County of Chester,
Smith, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by
Her Letters Patent, bearing date the Eleventh day of August,
in the year of our Lord One thousand eight hundred and fifty-
three, in the seventeenth year of Her reign, did, for Herself, Her

page_text: heirs and successors, give and grant unto me, the said Thomas s
Kelley Hall, Her especial license that I, the said Thomas Kelley
Hall, my executors, administrators, and assigns, or such others as
I, the said Thomas Kelley Hall, my executors, administrators,
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 make, use, exercise, and
vend, within the United Kingdom of Great Britain and Ireland,
the Channel Islands, and Isle of Man, my Invention for "CERTAIN
IMPROVEMENTS IN FORGE HAMMERS," upon the condition (amongst
others) that I, the said Thomas Kelley Hall, by an instrument in
writing under my hand and seal, should particularly describe and
ascertain 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 Thomas Kelley Hall, do
hereby declare the nature of my said Invention, and in what
manner the same is to be performed, to be particularly described
and ascertained in and by the following statement and accom-
panying Drawings (that is to say):
My Invention consists of a novel arrangement of mechanism
for the purposes of raising the hammer to the required height,
and the liberating of the same so as to allow the hammer to fall
and effect the blow or force desired, such apparatus or inechanism
being self-acting, and also capable of being readily adjusted so as
to give any required weight or effective force produced by the
falling of the hammer, together with any required rapidity of
action. The hammer may be so constructed as to allow of any
traverse or lateral motion, thereby obviating the necessity of
moving the metal or work to be forged as the blows are required
to be spread over different parts of the same, but which lateral
traverse either to the right or left may be made self-acting and
uniform or otherwise, as required. In order more fully to describe
the particular features of my improvements, and the machinery or

page_text: apparatus connected therewith, I have attached to these presents
a Sheet of Drawings illustrative of the same, and have marked
thereon letters of reference corresponding with those in the
following description. The Figures are drawn upon a scale of
about one inch to the foot, and have similar letters marked upon
corresponding parts in all the views.
DESCRIPTION OF THE DRAWINGS.
Fig. 1, is a side elevation of the machine, shewing the inclined
plane by which the adjustment of the fall of the hammer is
regulated. Fig. 2, is an end or back elevation. Fig. 3, is a plan
view, and Fig. 4, is a front elevation of the same.
a, is the
hammer head, fitted upon the end of the beam or lever b, and
fitted into a boss or socket c, and traversing upon the square
shaft d, acted upon by the screw e, working in the nut f, the upper
end of which fits loosely in the groove g, of the boss or socket c.
h, and i, are pulleys, fast and loose, which give motion to the screw
in either direction, according as the blows of the hammer are
required, and which pulleys are driven by a strap from the
pulley, keyed upon the main or driving shaft. 7, m, are the main
fixed and loose pulleys, which communicate motion to the principal
or driving shaft, l, n, being a toothed wheel that may be also used
for the purpose, if preferred or requisite. o, p, and q, are friction
rollers, the intermediate one p, communicating motion to the
pulley o, fixed on the square shaft, and thereby raising the hammer
and causing it to fall when thrown out of contact with the rollers o,
and 7. r, is a tie-link, or brace by which the requisite pressure of
contact of the three friction rollers is maintained, having a slot in it
to allow of the shaft of the roller p, moving freely within in it as it
is thrown into or out of contact with the rollers o, and q. s, is the
adjusting arm, having an incline t, attached to and moving along
or upon it, actuated by the screw u. v, is a cam fixed upon the
square shaft, and which being raised as the hammer rises lifts or
forces upwards the adjusting arms, and withdrawing the friction
roller p, causes the hammer to fall. w, is a spring which arrests

page_text: and retains the adjusting arm whilst the hammer is falling by s
means of the stud a, upon the end of the shaft of the friction
roller p. y, is the fulcrum upon which the adjusting arm works.
z, is a C spring wheel acting upon a cam upon one end of the
square shaft. d, may be used to increase the force or weight of the
blows of the hammer. a', is a lever acting upon the circular
brake b', by which the hammer can be arrested and held at any
point of its elevation or whilst descending.
Having thus described the nature and objects of my said im-
provements, together with the manner of carrying the same into
practical effect, I would remark, in conclusion, that I claim as my
Invention the raising or elevating of forge hammers by means of
friction rollers in combination with the adjusting arm, by which the
fall of the hammer is regulated and its speed or action governed,
by the means herein-before particularly set forth and described,
and more particularly exhibited in the Drawings annexed.
In witness whereof, I, the said Thomas Kelley Hall, have
hereunto set my hand and seal, the Ninth day of February,
in the year of our Lord One thousand eight hundred and
fifty-four.
THOMAS KELLEY HALL. (L.S.)
THOMAS KELLEY HALL. (L.S.)