A NEW OR IMPROVED COMPOUND MANUAL LEVER HAMMER
Year: 1881

page_text: LETTERS PATENT to John Cuthbert, of Landport, Engineer, and George Hall
King, of Portsen, Gentleman, in the County of Hampshire, for an Invention
of "A NEW OR IMPROVED COMPOUND MANUAL LEVER HAMMER."
PROVISIONAL SPECIFICATION left by the said John Cuthbert & George
Hall King at the Office of the Commissioners of Patents on the 15th June
1881.
JOHN CUTHBERT, of Landport, Engineer, and GEORGE HALL KING, of Portsea,
Gentleman, in the County of Hampshire. "A NEW OR IMPROVED COMPOUND
MANUAL LEVER HAMMER.”
The object of this Invention is to supply a more powerful hammer than the.
sledge hammer in cases where it is inconvenient to have recourse to steam power,
and this want, long felt, is by this Invention most effectually supplied, and from its
economical construction this hammer can be had at such a cost as will place it
within the attainment of a numerous class hitherto unable to have such a useful
auxiliary.
This Invention consists as follows:-A frame consisting of two vertical side
pieces suitably secured to a base plate or flanges by bolts and nuts, and connected
together at suitable intervals by stays. These side pieces of frame carry at their
upper part an L shaped piece, upon which is centred a quadrant.
To the upper corner of this quadrant is secured the upper end of a chain, carrying
at its lower end thic striking piece or hammer proper. Directly beneath the hammer,
within or near to the frame, the sides of which are suitably curved for the purpose
of its being thus conveniently disposed, is the anvil. By the motion of the
quadrant, which is operated by means of a connecting rod worked by a lever
whose fulcrum is on a rod or stay on the hammer frame, the chain and thereby
the hammer is raised to the necessary or desired striking height, and the blows are
given by alternately operating and releasing the lever. The connecting rod may
be formed with a fork or slot to allow of the working of a portion of the quadrant
through the orifice thus formed, and to render the whole arrangement so compact
as to occupy but little space; the hammer is thus under perfect control, and can
be easily worked by one man. A small sized hammer on this construction will
deliver a blow of from one pound to half a ton, as may be required, and twenty
five half ton blows or sixty of half that power can easily be delivered per minute.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, & of an
Order of the Lord Chancellor, filed by the said John Cuthbert & George Hall
King in the Great Seal Patent Office on the 31st January 1882.
JOHN CUTHBERT, of Landport, Engineer, and GEORGE HALL KINO, of Portsca,
Gentleman, in the County of Hampshiro. "A NEW OR IMPROVED COMPOUND
LEVER HAMMER."
The object of this Invention is to supply a more powerful hammer than the
sledge hammer in cases where it is inconvenient to have recourse to steam power,
and this want, long felt, is by this Invention most effectually supplied, and from
its economical construction this hammer can be had at such a cost as will place it
within the reach of a numerous class hitherto unable to have such a useful
auxiliary.
This Invention consists as follows:-A frame consisting of two vertical side
pieces are suitably secured to a base plate or flangos by bolts and nuts, and is
connected together by stays at suitable intervals.
These side pieces of frame carrying at their upper part a cross or head pieco
upon which is centred an eccentric shaped quadrant. To the upper corner of the
eccentric quadrant is secured the upper end of a chain, carrying at its lower end
the striking piece or hammer proper. Directly beneath the hammer and at its
base is placed the anvil within or near to the frame, the vertical sides of which
being suitably curved for the purpose of its convenient reception. By the motion
of the excentric shaped quadrant, which is operated by means of a V, L, or other
angular shaped lever having a linked connection or other suitable connecting rod
at the angle, and whose fulcrum is on a rod or stay fixed to the hammer frame.
The chain and striking piece or hammer propor are raised by the deflection of
the angular lover to the necessary or desired height, and the blows are thus given
by alternately operating or releasing the said lever. At the top of each of the
two vertical sides of the framework are affixed a flat or other suitably shaped
spring, the same being compressed in contact with the hammer or striking piece
when raised to its extremo height.
The connecting rod may be formed with a fork or slot to allow of the working
of a portion of the quadrant through the orifice thus formed, and to render tho
whole arrangement so compact as to occupy but little space.
The hammer is thus under perfect control, and can be easily worked by one
man. A small sized hammer on this construction will deliver a blow of from one
pound to half a ton, as may be required, and 25 half ton blows or 60 of half that
power can easily be delivered per minute. .
That the nature of this Invention and the manner in which the same is carried
into practical effect may be destinctly described and ascertained, as this Specification
is accompanied by a Sheet of Drawings having Figures and letters of reference
marked thereupon, the like letter being used to denote a similar or corresponding
part in each Figure.
In these Drawings Figure 1 is a side elevation, Figure 2 a front elevation,
and Figure 3 a plan of a hammer constructed according to the Invention. The
same letters of reference indicate like parts in all the respective Figures. The
frame is marked A, the base or foundation plate or flange B, the stays through-
out C, the cross or head piece carrying the quadrant, and on which it centres D,
the eccentric quadrant E, the chain F, the striking piece or hammer G, the anvil H,
the anvil block H', the angular lever operating the quadrant I. This angular
lever operating the quadrant I should be connecting rods compound in itself. This
power of compound fulcrum adapted to leverage may also be applied to other

page_text: niechanical movements, namely, to the treadles of bicycles and other machines, and
the moveable lever connection K, L, indicates the lever arm; M shows the recoil
chain; N, the springs; O, spindle to quadrant, and P points out the radius pall;
Q marks the lever pall, R, R¹, the steps for oiling the hammer; S indicates
the guide bars to the hammer; W shows the truss arm; Y, the angle iron brackets
for securing the springs, and Z the bed of the herein before mentioned hammer.
It will be obvious that this Invention may be modified in some of its details,
whilst its main features are retained, and we wish it distinctly to be understood that
what we claim and desire to secure by the hereinbefore in part recited Letters
Patent is,
First. The construction of hammers operated by a suitably constructed angular
shaped lever, at the angle of which is pivoted a moveable connecting rod working
on the frame.
Secondly. An eccentric or other suitable quadrant operated by the upper arm of
the angular shaped lever.
c
And, Thirdly. For the construction of a manuel lever bammer, in the manner
and for the purposes substantially as described in this Specification on the
accompanying Drawings illustrated.
In witness whereof, we, the said Jolin Cuthbert and George Hall King,
have hereunto set our hands and seals, this Twenty eighth day of January,
in the year of our Lord One thousand eight hundred and eighty two.