IMPROVEMENTS IN STEAM HAMMERS
Year: 1884

page_text: We GILBERT GLOSSOP and FREDERICK HARVARD STACEY both of Heeley
Bridge Foundry Sheffield in the County of York Manufacturers do hereby declare
the nature of our said invention for IMPROVEMENTS IN STEAM HAMMERS to be as
follows:-
Our improvements in Steam Hammers refer particularly to the valve motion of
such hammers, the object being to dispense with all unnecessary joints, and springs,
and to obtain the various movements viz selfacting, variable power, hand motion,
and dead blow, in the most simple and efficient manner.
In carrying out our invention we attach to the ordinary valve motion a short
arm or lever carrying a slide block, the face of which is at an angle to correspond
with, and slide against a tapered slide attached to the tup. The slide is so
arranged that as the tup rises the slide-block is pressed back and the valve rod is
actuated. The hand motion is worked. by means of a hand-lever-working on a
fulcrum, the short end being attached to a vertical rod, which slides in a bearing
and is fixed directly under the valve rod; this vertical rod is not connected to the
valve-rod, but is brought in connection with it by pressing down the hand lever.
We construct the valve in such a manner that the steam operates the valve in
the contrary. direction to that of the hand lever, thus when the pressure put on the
hand lever which has been sufficient to raise the valve is withdrawn, the motion of
the valve is reversed by the action of the steam.
When the hand lever is pressed down to operate the valve, the slide-block is
drawn fron the face of the tup slide, the reverse movement replaces it in position
again.
During the selfacting movement, the hand lever and vertical rod, are stationary,
being out of contact with the working parts of the hammer.

page_text: COMPLETE SPECIFICATION.
We GILBERT GLOSSOP and FREDERICK HARVARD STACEY, both of Heeley
Bridge Foundry, Sheffield in the County of York, Manufacturers do hereby
declare the nature of our invention for IMPROVEMENTS IN STEAM HAMMERS and
in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement, that is to say:-
Our improvements in Steam Hammers refer particularly to the valve motion of
such hammers the object being to dispense with all unnecessary joints, and springs,
and to obtain the following actions and blows, namely, selfacting motion, and
hand motion, variable power, and dead blow, in the most simple and efficient
manner.
And in order that this our Specification may be clearly understood, we annex a
sheet of drawings showing our improvement applied to a Steam Hammer, the same
letters of reference, indicate the same parts in either of the two figures.
:
Fig. 1, is a back elevation of a Steam Hammer.
Fig. 2, is a side elevation of same.
In carrying out our invention, we attach to the ordinary valve motion, (repre-
sented in the drawings by. the lever A, the short arm B, and the valve rod C,)
another short arm D, having at its extremity a slide block E, the face of which is
arranged to slide against the face of an inclined plane F, attached to the tup G.
The slide block E, bas a slight rocking motion on the pin H, to allow the adjust-
ment of its face against the face of the incline F, as their relative positions are
altered during the working of the hammer.
We make the circular valve I, with its lower face I¹, of larger diameter than
that of the upper one I2 so that the tendency of the steam is to keep it down, thus
it will be seen that when the steam enters the valve box, the valve is forced to the
bottom and opens the bottom port to the Cylinder,-causing the tup to rise, and
the incline F, to force back the slide-block E, raising the valve rod C, and the
valve I, and thus opening the upper port which causes the tup to descend,―The
valve also descends by the action of the steam, and the above described action of
the hammer is repeated.
The hand motion and dead blow are obtained by means of a vertical rod J, held
in guides directly under the end of the valve-rod C, but not attached thereto, its
normal position being to keep it just clear of the valve-rod when the hammer is
selfacting.
The vertical rod J, may be operated by the hand lever K, as shown in the
drawings, or by a foot lever of ordinary. construction.
When the lever K is. pressed down, it raises the valve lever and operates the
valve, at the same time it draws back the slide block E from the face of the incline,
and on withdrawing the pressure from the lever K, the power of the steam forces
down the valve and valve rod, keeping it in contact with the end of the vertical
rod J, and replacing the slide block.
During the selfacting movement of the hammer the vertical rod J, and hand
lever K, are stationary, being clear of the working parts.

page_text: The hand lever A, which we do not claim, is used for varying the power of the
blow, by altering the range of the valve.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is
1-In steam Hammers utilising the pressure of steam to keep the selfacting
Valve gear, in connection with the tup (or other moving parts used for imparting
motion to the valve) in such a manner as to dispense with the use of springs or
weights usually employed for that purpose.
2-In Steam Hammers the combination of a valve with a selfacting valve-
motion so constructed that when the valve is moved towards one end of the valve
box by the tup acting on the valve motion, it is reversed by the pressure of stenm
in the valve chamber substantially as hereinbefore described and illustrated.
3 In connection with selfacting Valve motions of steam Hammers we claim the
use of a hand or foot motion which in its normal position is disconnected from the
selfacting gear, and stationary, but which can be put into action during the working
of the selfacting motion (or otherwise) at the will of the operator, substantially as
hereinbefore described and illustrated.