Improvements in Steam Fire and other Pumping Engines.
Year: 1892

page_text: Date of Application, 22nd Aug., 1892
Complete Specification Left, 20th May, 1893-Accepted, 24th June, 1893
PROVISIONAL SPECIFICATION.
Improvements in Steam Fire and other Pumping Engines.
JAMES COMPTON MERRYWEATHER and CHRISTOPHER JOHN WALLACE
JAKEMAN of the firm of Merryweather & Sons Ltd. of Greenwich Road
Greenwich, in the County of Kent, Engineers, do hereby declare the nature of this
invention to be as follows:-
The crosshead instead of being bifurcated as described in Patent 1855 of 1880
and granted to Henry Merryweather and the said Christopher John Wallace
Jakeman, is formed with one limb only having a pin forged solid or fixed to it on
one side for the attachment of the connecting rod, and fitted on the opposite side
with a lug or boss, this boss bas & bushed hole longitudinally placed which slides
upon a turned rod or guide secured to the top of the pump parallel to the axial line
of the engine. The crosshead is otherwise of the form described in the previous
Patent referred to in order to provide space for a long connecting rod and ensure
easy running.
In some cases particularly in smaller engines we dispense with the crosshead and
connecting rod and use a slotted link of special form. The link instead of being
flat as is the usual construction takes the form of a hollow cylinder closed at the
two ends and having a slot at one side of sufficient size to allow the neck of the
crank pin to pass. The block which engages the crank pin is cylindrical and fits
in the cylindrical link in which it slides.
The closed ends of the cylindrical link serve to contain oil which lubricate the
sliding parts at each stroke.
The sliding block has holes bored from the ends to the crank pin hole, so that
the crank pin is continuously lubricated.
This invention relates principally to double cylinder horizontal engines but is
also applicable to vertical and other engines with one or more cylinders.
Dated this 22nd day of August 1892.
J. C. MERRIWEAT
C. J. W. JAKEMAN.
Tv.
COMPLETE SPECIFICATION.
Improvements in Steam Fire and other Pumping Engines.
We, JAMES COMPTON MERRYWEATHER, and CHRISTOPHER JOHN WALLACE
JAKEMAN of the firm of Merryweather & Sons, Ltd., of Greenwich Road,
Greenwich, in the County of Kent, Engineers, 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 :-
The crosshead instead of being bifurcated as described in Patent 1855 of 1880,
and granted to Henry Merryweather and the said Christopher John Wallace
Jakeman is formed with one limb only, having a pin forged solid or fixed to it on
one side for the attachment of the connecting rod, and fitted on the opposite side
with a lug or boss; this boss has a bushed hole longitudinally placed which slides
upon a turned rod or guide secured to the top of the pump parallel to the axial line
of the engine. The crosshead is otherwise of the form described in the previous
Patent, referred to, in order to provide space for a long connecting rod and ensure
easy running.
In some cases, particularly in smaller engines, we dispense with the crosshead
and connecting rod, and use a slotted link of special form. The link instead of

page_text: being flat, as is the usual construction, takes the form of a hollow cylinder closed
at the two ends, and having a slot at one side of sufficient size to allow the neck of
the crank pin to pass.
The block which engages the crank pin is cylindrical, and
fits in the cylindrical link in which it slides.
The closed ends of the cylindrical link serve to contain oil which lubricate the
sliding parts at each stroke.
The sliding block has holes bored from the ends to the crank pin hole, so that
the crank pin is continuously lubricated.
This invention relates principally to double cylinder horizontal engines, but is
also applicable to vertical and other engines with one or more cylinders.
Referring to the annexed sheet of drawing,-
Fig. 1.-represents a side elevation of the crosshead.
Fig. 2. an end view of same.
Fig. 3.-plan.
Fig. 4. is a sectional elevation of the slotted crosshead.
Fig. 5. plan of the same.
Fig. 6. a cross section taken on the line A B of Fig. 4.
In describing the figures the same letters will have reference to similar parts in
each view.
In Figures 1, 2, and 3, C represents the arm of the crosshead. D, the boss
which slides upon a guide parallel to the axial line of the engine. E, the piston
rod connecting cylinder and pump. F, the pin on which the small end of the
connecting rod works.
In cases where we dispense with the use of the connecting rod, we use the
crosshead shown in Figures 4, 5 and 6.
G, is the slotted crosshead in which the cylindrical block H reciprocates. I, is
the crank pin actuated by the block H. J & K; represent the piston and pump
rods, and L, the lubricating arrangements. M, is the crank disk and N, the main
shaft of the engine.
After considerable wear of this crosshead it is only necessary to renew the
block H, which can be accurately fitted on to the crank pin I, and in the
crosshead G.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
--
1st. The construction of the crosshead for pumping engines, substantially as
described in reference to Figures 1, 2, and 3.
2nd. The construction of a cylindrical slotted link closed on one side for use in
steam fire engines, and other pumping engines, substantially as described in
connection with Figures 4, 5, and 6.
Dated this 19th day of May 1893.
JAMES COMPTON MERRYWEATHER.
CHRISTOPHER JOHN WALLACE JAKEMAN.