Improvements in Direct-acting Pumping Engines.
Year: 1889

page_text: Date of Application, 18th July, 1889
Complete Specification Left, 17th Apr., 1890-Accepted, 17th May, 1890
PROVISIONAL SPECIFICATION.
Improvements in Direct-acting Pumping Engines.
1 CHARLES WILLIAM BURTON of Nogent Près Creil in the Department of the Oise
and Republic of France, Engineer do hereby declare the nature of this invention to
be as follows:-
My invention relates to an improved method of construction of the parts which in
direct acting pumping engines of whatever form that may be serve for actuating the
slide valves or other suitable form of steam distribution valves. The improvements
are applicable either to engines which have only one piston rod, or to those which are
known as Duplex engines. In the case of the former type of engines where a
steam moved main slide valve is employed the parts in question are employed for
actuating the auxiliary slide, while in the case of the duplex type they actuate the
main slides, or other form of steam distribution valves. I may also employ an
improved construction of the ends of the steam or water cylinders in conjunction with
the parts for actuating the steam distribution valves. The crosshead of a direct
acting pump has hitherto been made in a separate piece from the rod which acts as
both piston and pump rod, but I make my improved crosshead in one piece with such
rod (with certain exceptions which are specified below). In the cross-head, I may
form a central slot, either flat or curved at its ends, and I may fit its ends with false
surface pieces which upon becoming worn may be easily renewed. The end of the
lever which actuates (through suitable connections) the slide or other form of steam
distribution valve, works in this slot, and is pushed to and fro by the action of the
ends of the slot upon its surfaces which latter are suitably curved for producing
regular motion and the minimum amount of friction. The end of the lever may be
made to fit the slot with sufficient accuracy, with respect to its sides, to prevent any
tendency of the piston rod to rotate. I may make the cross-head suitable for
actuating a forked lever, in which case the central part of it may remain solid while
the sides are formed flat with projections at their ends which will operate upon the
ends of the lever, the flat sides fitting into the forked part so as to prevent any
rotation of the piston rod. I may also make the cross-head of such form, that a pro-
jection or projections forming a pin or pins on one or both sides of it, may be constructed
or a pin may be put quite through it, either above or below its centre or in its centre
line as desired, such pin or pins working in a slot in the end of the lever which actuates
the steam distribution valve, or in the end of a suitable link connected at its other
end to the lover.
In cases where on account of length, or for any other reason, it may be desirable
to form the piston rod and pump rod separately from each other, and to connect them
by means of a coupling, my improved cross-head may form part of such coupling
and be in one piece with it. To facilitate the removal of the piston rod and combined
cross-head when required I may construct the front or inner end of the steam or
water cylinder of such form that its cover is removeable through the bore of the
cylinder so that when the bolts which hold the cover are removed, the cover together
with its piston rod and cross-head can be dismounted by passing them through the
cylinder and out at its back end. I append a drawing to more clearly set forth the
improvements described in this Provisional Specification. Figure 1 is a side elevation
of a duplex pump fitted with my improved cross-heads at a a', which are each in one
piece with the respective piston rods, one piston rod b only being visible. The
cross-heads here shewn have their centre portions slotted out and details of their con-
struction are given at Figuro 2, as follows:-a is the body or main portion of the
cross-head, c is a slot the ends of which are semicircular (but which may be flat or
of any desired conformation). The ends are constructed wider than the rest of the

page_text: slot and are provided with recesses into which are fitted pieces of metal dd which
form false or removable surface pieces; such pieces may be made of any suitable
metal hardened or otherwise, and should they become worn or injured may easily be
renewed. Figure 3 shews my improved cross-head having flattened sides and
operating a forked lever g, it is constructed in one piece with its piston rod b
Figure 4 shews the improved cross-bead combined in one piece with a coupling
suitable for connecting a piston and pump rods made separately from each other; in
this case the cross-head is shewn slotted as in Figures 1 and 2. It will be observed
that in all these forms the levers fit sideways the slot or the flattened surfaces so as to
prevent the piston rods from turning.
one piece with its piston rod b, and provided with a pin m passing through it, and
Figure 5 shows my improved cross-head k in
actuating a forked lever n slotted at its ends as shewn. No drawing is needed to
explain the manner in which I may make the pin m solid with the cross-head either in
the form of one or of two projections, nor the means by which such pins or projections
may be connected to a lever of suitable form by means of a link. Figure 1 shews
my improved cylinder cover e which is constructed with its outside diameter slightly
less than that of the bore of the cylinder (or of any desired diameter not exceeding
that of the bore of the cylinder) so that it can be put in position by passing it
through the back end of the cylinder. This construction enables the piston rod b
with its solid cross-head a to be put in position and the cover to be put in place
afterwards. The form of cover shewn at e may be applied to the water barrels,
instead of to the steam cylinder when more convenient.
Dated this Eighteenth day of July 188a
For the Applicant,
W. E. GEDGE,
Amani
COMPLETE SPECIFICATION.
Improvements in Direct-acting Pumping Engines.
I CHARLES WILLIAM BURTON of Nogent près Creil in the Department of the
Oise and Republic of France, Engineer, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
My Invention relates to an improved method of construction of the parts which in
direct acting pumping engines, of whatever form they may be, serve for actuating
the slide valves or other suitable form of steam distribution valves. The improve-
ments are applicable either to engines which have only one piston rod, or to those
which are known as Duplex engines. In the case of the former type of engines
where a steam moved main slide valve is employed the parts in question are employed
for actuating the auxiliary slide, while in the case of the duplex type they actuate the
main slides, or other form of steam distribution valves. I may also employ an improved
construction of the ends of the steam or water cylinders in conjunction with the
parts for actuating the steam distribution valves. The crosshead of a direct acting
pump has hitherto been made in a separate piece from the rod which acts as both
piston and pump rod, but I make my improved cross-bead in one piece with such rod
(with certain exceptions which are specified below). In the cross-head, I may form a
central slot, either flat or curved at its ends, and I may fit its ends with false surface
pieces which upon becoming worn may be easily renewed. The end of the lever
which actuates (through suitable connections) the slide or other form of steam dis-
tribution valve, works in this slot, and is pushed to and fro by the action of the ends
of the slot upon its surfaces which latter are suitably curved for producing regular
motion and the minimum amount of friction. The end of the lever may be made to
fit the slot with sufficient accuracy, with respect to its sides, to prevent any tendency
of the piston rod to rotate. I may make the cross-head suitable for actuating a
forked lever, in which case the central part of it may remain solid while the sides are
formed flat with projections at their ends which will operate upon the ends of the

page_text: lever, the flat sides fitting into the forked part so as to prevent any rotation of the
piston rod. I may also make the cross-head of such form, that a projection or pro-
jections forming a pin or pins on one or both sides of it, may be constructed or a pin
may be put quite through it, either above or below its centre or in its centre line as
desired, such pin or pins working in a slot in the end of the lever which actuates the
steam distribution valve, or in the end of a suitable link connected at its other end to
the lover.
In cases where on account of length, or for any other reason, it may be desirable to
form the piston rod and pump rod separately from each other, and to connect them by
means of a coupling, my improved cross-head may form part of such coupling and be
in one piece with it. To facilitate the removal of the piston rod and combined cross-
head when required I may construct the front or inner end of the steam or water
cylinder of such form that its cover is removable through the bore of the cylinder so
that when the bolts which hold the cover are removed, the cover together with its
piston rod and cross-head can be dismounted by passing them through the cylinder
and out at its back end. To more clearly set forth my improvements 1 will now refer
to the Drawing left with the Provisional Specification upon which Figure 1 is a side
elevation of a duplex pump fitted with my improved cross-heads at a a', which are each
in one piece with the respective piston rods, one piston rod b only being visible. The
cross-heads here shown have their centre portions slotted out and details of their con-
struction are given at Figure 2 as follows:-a is the body or main portion of the
cross-head, is a slot the ends of which are somi-circular (but which may be flat or
of any desired conformation). The ends are constructed wider than the rest of the
slot and are provided with recesses into which are fitted pieces of metal d d which
form false or removable surface pieces; such pieces may be made of any suitable
metal hardened or otherwise, and should they become worn or injured may easily be
renewed. Figure 3 shews my improved cross-head having flattened sides fand
operating a forked lever g, it is constructed in one piece with its piston rod b.
Figure 4 shews the improved cross-head combined in one piece with a coupling j
suitable for connecting a piston and pump rods made separately from each other; in
this case the cross-head is shewn slotted as in Figures 1 and 2. It will be observed
that in all these forms the levers fit sideways the slot or the flattened surfaces so as to
prevent the piston rods from turning. Figure 5 shows my improved cross-head kin
one piece with its piston rod b, and provided with a pin m passing through it, and
actuating a forked lever n slotted at its ends as shewn. No drawing is needed to
explain the manner in which I may make the pin m solid with the cross-head either in
the form of one or of two projections, nor the means by which such pins or projections
may be connected to a lever of suitable form by means of a link. Figure 1 shews
my improved cylinder cover e which is constructed with its outside diameter slightly
less than that of the bore of the cylinder (or of any desired diameter not exceeding
that of the bore of the cylinder) so that it can be put in position by passing it through
the back end of the cylinder. This construction enables the piston rod b with its
solid cross-head a to be put in position and the cover to be put in place afterwards.
The form of cover shewn at e may be applied to the water barrels, instead of to the
steam cylinder when more convenient.
Upon the Drawing filed with this Complete Specification and marked Sheet II.
Figure 7 shows in section and in plan the cross-head a having the ends of the slot c
flat instead of curved as at Figure 2; the wearing pieces d d being correspondingly
shaped and overlapping the cross-head.
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-
In direct acting pumping engines having steam distribution valves moved by rocking
levers through the medium of one or more cross-heads.
1. A cross-head or cross-heads in one piece with their piston and pump rods as
described.

page_text: 2. A slot in the cross-head substantially as described for the purpose specified.
3. A slot (c) in the cross-head (a) larger at its ends than at its central portion and
the combination therewith of easily removable and renewable wearing pieces (d, d,)
fitted into recesses formed in the enlarged ends, substantially as described and shown
on the drawing.
4. A cross-head in one piece with the coupling substantially as described and shown
Figure 4 of the drawing.
5. One or more than one steam or water cylinder covers (e) so arranged as to be
removable through the bore and out at the back end of the steam or water cylinder or
cylinders, thereby facilitating the putting in or withdrawing from its place of the
piston and pump rods and their cross-heads, substantially as described and illustrated
Figure 1 of the Drawing.
Dated this Seventeenth day of April 1890.