Improvements in the Construction of Forge and Tilt Hammer Helves.
Year: 1886

page_text: Date of Application, 17th Mar., 1886.
Complete Left, 17th Dec., 1886.
Complete Accepted, 18th Jan., 1887.
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Forge and Tilt Hammer
Helves.
I JOHN FRANCIS HALL of Norbury, Sheffield in the County of York Manager of
Steel Works, do hereby declare the nature of my said invention for IMPROVEMENTS IN
THE CONSTRUCTION OF FORGE AND TILT HAMMER HELVES to be as follows:-
This invention is to do away with the use of wood helves for Forge and Tilt
Hammers, and the consequent operations of shrinking upon the helve the expensive
wrought iron forgings known as the hursts, heads, tailpieces; and hoops, and to
accomplish this object I propose to cast the complete apparatus in steel, hollow in the
interior, so as to approximate to the weight of the wood helves when complete.
I am aware that Helves have been cast solid in cast iron, and also forged solid, and
built up with wrought plates, but my invention goes beyond these methods of
manufacture, being to cast the whole helve with the tailpiece, hurst, and hammer
head in one hollow steel casting.
Where the tail of the helve strikes the cogs of the driving wheel, I prepare a
dovetail to a removable hard steel plate, a similar dovetail being formed on the
underside to receive a similar removable plate or block so that these parts may be
renewed as required.
The head is also prepared to receive the various hammer faces required for different
work.
Although I may cast the hurst, or the trunnions on which the helve works in one
piece with the helve, I may if preferred cast the helve without them, in such a manner
that a "through hurst" or axle may be used, or so shape and cast the outside that a
hurst made in half rings may be readily secured in position by bolting it together.
DORT T
DRIDV

page_text: Improvements in the Construction of Forge and Tilt Hammer
Helves.
1, JOHN FRANCIS HALL of Norbury, Sheffield in the County of York, Manager of
Steel Works do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement:-
This invention is intended to supersede and dispense with the use of Wood Helves
as now used for Forge and Tilt Hainmers, and thereby to avoid the great expense
of the forgings known as hursts, heads, tailpieces, and hoops which are used in
conjunction with wood helves, and also the constant repairs consequent upon the
breakage of the helves themselves.
To accomplish this object, I cast the complete helve in steel, approximating to the
shape of the ordinary wood helve the interior being hollow so as to combine lightness,
strength, and elasticity.
And in order that my invention may be clearly understood I annex a sheet of
drawings in which similar letters indicate similar parts in any of the figures in which
they occur.
Fig. 1, is à side elevation part in section of a steel Helve made according to my
invention.
Fig. 2, is a plan of sainc.
Fig. 3, a through-Hurst.
I am aware that solid cast iron helves have been made, also that helves have been
built up of wrought iron or steel plates, but my invention goes beyond these methods
of construction, the first being only applied to heavy, slowly driven helves, lifted from
the head, and the second being an expensive and not a satisfactory method.
In carrying out my invention, I prepare suitable patterns, from which a mould is
made in sand or loam, and I cast a complete helve A, as shown in Figs. 1 & 2, having
a hollow body.
The head B, is provided with a dovetailed slot to receive the hammer faces C, which
have to be repeatedly changed, and the tail end is also slotted to receive renewable
striking pieces D.
I may if desirable cast the trunnions or pivots on which the helve works solid with
the body, but I prefer to cast an oblong hole through each side of the body, and to
use a renewable through-Hurst" E, which is secured by the wedges F, and can also
he adjusted in longitudinal position. In some cases the helve may be prepared to
have side-hursts bolted to it.
Having now particularly described and ascertained the nature of my said Invention
and in what manner the same is to be performed I declare that what I claim is :-
Constructing Forge and Tilt-Hammer Helves of a single hollow steel Casting for
the purpose specified, and substantially as hereinbefore described and illustrated.
ROBI. F. DRUKY,
Agent for the Applicant.