IMPROVEMENTS IN VALVE MOTION APPLICABLE TO STEAM HAMMERS
Year: 1885

page_text: I ALFRED TAYLOR of Alma Street Works Sheffield in the county of York
Engineer do hereby declare the nature of my invention for "IMPROVEMENTS IN
VALVE MOTION APPLICABLE TO STEAM HAMMERS" to be as follows:-
My invention consists of giving direct motion to the valve by one simple lever
(of the first or second kind by preference the second) the motion being obtained
from the trip of the hammer direct, the lever resting on a stud bolted through it
and kept in position on the stud by the action of the steam upon the valve owing
to a difference of the area of the valve heads whereby the steam causes the valve to
bear down upon the lever thus dispensing with springs. This arrangement also
allows of the valve being raised or lowered at pleasure by an eccentric lever thus
opening or shutting the ports giving light or heavy blows or a dead blow by
hand; thus it can be changed from self acting instantly by one lever and vice
versa.
The cylinder and piston being constructed in the usual way I propose to use a
piston valve with two heads of unequal diameter or area. The steam or other
fluid is admitted into the valve chest between the two pistons and the exhaust
passes into the valve chest from the cylinder at each end and through the exhaust
pipe. The valve is made to reciprocate in the casing either by hand or the latter
motion is obtained automatically in the manner stated above from the tup of the
hammer on which is bolted a stud and on this rests a lever the fulcrum of which
is an eccentric stud preferably bolted through the standard of the hammer and at a
suitable distance from the fulcrum the valve spindle is connected by a slot joint.
The lever passes through this slot suitably fitted with a circular projection to suit
the radial motion of the lever and has hardened steel faces to reduce friction to
a minimum. The eccentric stud is fitted with a fast lever which is used to raise or
lower the valve to give either long or short strokes and light or heavy blows or it
can be worked by brand independently owing to the lever not being rigid as the
larger area of the one piston valve head keeps the lever always in position for self
acting motion.

page_text: "
I ALFRED TAYLOR of Alma Street Works Sheffield in the County of York
Engineer do hereby declare the nature of my invention for "IMPROVEMENTS IN
VALVE MOTION APPLICABLE TO STEAM HAMMERS and in what manner the same
is to be performed, to be particularly described and ascertained in and by the
following statement:—
My Invention consists of giving direct motion to the valve by one simple lever
(of the first or second kind by preference the second) the motion being obtained from
the tup of the hammer direct the lever resting on a stud bolted through it and
kept in position on the stud by the action of the steam upon the valve owing to a
difference of the area of the valve heads whereby the steam causes the valve to
bear down upon the lever, thus dispensing with springs.
This arrangement also allows of the valve being raised or lowered at pleasure by
an eccentric lever thus opening or shutting the ports giving light or heavy blows
or a dead blow by hand; thus it can be changed from self acting instantly by one
lever and vice versa.
The cylinder and piston being constructed in the usual way I propose to use a
piston valve with two heads of unequal diameter or area. The steam or other fluid
is admitted into the valve chest between the two pistons and the exhaust passes
into the valve chest from the cylinder at each end and through the exhaust pipe.
The valve is made to reciprocate in the casing either by hand or automatically in
the manner stated above, the motion is obtained from the tup of the hammer on
which is bolted a stud and on this rests a lever the fulcrum of which is an eccentric
stud preferably bolted through the standard of the hammer and at a suitable
distance from the fulcrum the valve spindle is connected by a slot joint. The lever
passes through this slot suitably fitted with a circular projection to suit the radial
motion of the lever and has hardened steel faces to reduce friction to a minimum.
The eccentric stud is fitted with a fast lever which is used to raise or lower the
valve to give either long or short strokes and light or heavy blows or it can be
worked by hand independently owing to the lever not being rigid as the larger
area of the one piston valve head keeps the lever always in position for self acting
motion.
In the accompanying drawings Figure 1 is a side elevation partly in section of a
portion of a hammer constructed according to this invention. Figure 2 is a plan
also partly in section.
B is the hammer head or tup carrying the pin or stud C upon which rests the
free end of the lever A. which passes through the slot joint G and is pivotted at its
other end upon the eccentric pin F. This pin F is eccentrically disposed upon the
spindle F¹ which passes through the boss K upon the standard I and carries on its
other end the hand lever F shown dotted in behind the standard. The circular
projection H is adapted to slide in a horizontal direction through the slot joint G
and can also rotate as much as necessary to accommodate the radial motion from
the centre F upon which the rod A turns when the hammer is working.

page_text: The valve E is of the kind known as "piston valves" the lower head E¹ being
of larger area than the upper head E, the object being that when the steam is in
the valve chest between the two heads the pressure upon the larger head E¹ will
more than counterbalance that upon the smaller head E and the spindle D will
have a constant tendency downwards and the free end of lever A will be
pressed firmly upon C thus dispensing with springs or other customary means of
doing this.
By moving the lever F2 downwards the centre F is moved further away from
the centre line of the valve spindle D and consequently the travel of the valve is
reduced, less steam is admitted to the haminer piston L and the force of the blow
reduced By moving F in an upward direction the opposite result is produced.
The hammer may be worked by hand by the lever F as the lever A always
remains in position upon C ready for automatic working.
The distribution of the steam and the operation of the valve are so well under-
stood that they do not require explanation here.
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
A valve gear for steam hammers consisting of a single lever such as A so
arranged and connected with the valve spindle that the latter will be operated by
the lever without the intervention of any connecting gearing substantially as set
forth and illustrated in the drawings.
Dated wh
T
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