IMPROVEMENTS. IN TRIP HAMMERS
Year: 1872

page_text: LETTERS PATENT to George Haseltine, of the "International Patent
Office," Southampton Buildings, London, Doctor of Laws, for the
Invention of "IMPROVEMENTS. IN TRIP HAMMERS."-A communication
from abroad by Christopher Columbus Bradley, of Syracuse, New
York, United States of America.
Sealed the 14th March 1873, and dated the 24th December 1872.
COMPLETE SPECIFICATION filed by the said George Haseltine at
the Office of the Commissioners of Patents, with his Petition
and Declaration, on the 24th December 1872, pursuant to the 9th
Section of the Patent Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
HASELTINE, of the "International Patent Office," Southampton Build-
ings, London, Doctor of Laws, send greeting.
WHEREAS I am in possession of an Invention for "IMPROVEMENTS
IN TRIP HAMMERS," and have petitioned Her Majesty to grant unto me,
my executors, administrators, and assigns, Her Royal Letters Patent
for the same, and have made solemn Declaration that it has been com-
municated to me from abroad by Christopher Columbus Bradley, of
Syracuse, New York, United States of America.
NOW KNOW YE, that I, the said George Haseltine, do hereby
declare that the following Complete Specification, under my hand and

page_text: adjustable buffer spring; F is a shaft carrying a flanged pulley Gat
one end, the adjustable excentric H near its centre, and the fly wheel I
at the other end; J is a rock shaft carrying the arm K with the belt
tightening pulley L, a break block M, and a weighted lever N ; this
rock shaft is operated by the treadle O which is pivotted at e, and con-
nected with the rock shaft at f. P is a connecting rod attached to the
excentric strap at its lower end; its other end is connected by a pin joint
to the knuckle joint piece Q, and through the latter and the double
conical joint R to the yoke S. The said yoke which embraces the
trunnions whereon the helve vibrates has interposed between it and
the helve the two buffer springs c, c, which are compressed and
adjusted by the screws T. Each of the helve trunnions U is formed
separately and embraces nearly one half of the helve; it has a pro-
jecting boss to receive the pivots or centre pins b. The said two parts
being bolted together embrace the helve, making a connection which is
very strong and, secure and that may be readily tightened up to
compensate for shrinkage in the wood of the helve; V is the driving
belt which runs over the pulley G on the shaft F; W is a weight
attached to the break block.
The operation of this improved hammer is as follows:-Motion
being given to the driving belt V, and the treadle being forced down by
the operator, the break block is loosened, the belt tightened, and motion
is communicated to the main shaft F. The excentric gives motion to
the yoke S, and through the latter and the buffer springs c to the
helve and hammer. The elasticity of the buffer springs c, c, allows
the helve to be stopped at different points to admit different thicknesses
of metal between the forging dies. The force of the blow of the
hammer is governed by the speed at which the same is driven. The
position of the hammer may be adjusted by turning the connecting rod P
which is formed with right and left hand screws for this purpose.
The double pin connection is found to be an indispensable contrivance.
Without it, in adjusting the position of the hammer by the adjustable
centres b, the excentric strap would be thrown out of line and the
working of the hammer would be seriously impaired. The throw of
the excentric and thereby the travel or stroke of the hammer may be
regulated or adjusted by slacking the screw d, Figure 6, and turning the
excentric on the excentric sleeve.
When the treadle O is allowed to rise by the removal of the operator's

page_text: foot the tightening pulley L releases the band, and the break block M
is brought in contact with the fly wheel through the action of the
weight W. The hammer will thus be very easily and quickly stopped.
Having thus described the said Invention, as communicated to me by
my foreign correspondent, and the manner of performing the same, I
wish it understood that I claim,-
First. The packing between the different parts of the framing made
of wood, or other suitable material, for the purpose specified.
Second. The yoke S with the buffer springs c and the helve D in
combination with the trunnions U as herein described.
Third. The manner of securing the trunnions to the hammer helve as
herein described.
Fourth. The double pin or universal joint Q as herein described.
Fifth. The combination of the adjustable excentric H and adjustable
connecting rod P with the universal joint Q, as herein described.
Sixth. The weight W attached directly to the break block M, as herein
described and for the purpose specified.
Seventh. The buffer spring E secured and rendered adjustable as
herein described.
In witness whereof, I, the said George Haseltine, have hereunto
set my hand and seal, this Twenty-fourth day of December, in
the year of our Lord One thousand eight hundred and seventy-
two.
Witness,
WM. ROBT. LAKE,
8, Southampton Buildings,
London.
GEORGE HASELTINE. (L.S.)