ImproveMENTS IN STEAM ENGINES
Year: 1877

page_text: LETTERS PATENT to George Tangye, of the Firm of Tangye Brothers, of
Birmingham, in the County of Warwick, Manufacturers, and Henry Cherry, of
Aston, near Birmingham aforesaid, Mechanical Engineer, for the Invention
of “ImproveMENTS IN STEAM ENGINES."
Sealed the 13th October 1877, and dated the 19th May 1877.
.
PROVISIONAL SPECIFICATION left by the said George Tangye and Henry
Cherry at the Office of the Commissioners of Patents on the 19th May
1877.
GEORGE TANGYE, of the Firm of Tangye Brothers, of Birmingham, in the County
of Warwick, Manufacturers, and HENRY CHERRY, of Aston, near Birmingham
aforesaid, Mechanical Engineer. "IMPROVEMENTS IN STEAM ENGINES."
Our Invention consists of the construction and arrangement or combination of
the parts of steam engines hercin-after described, whereby simplicity of construction
and compactness of the parts and economy in manufacture are obtained.
According to our Invention we cast the bed, the front cylinder cover, the two
bearings of the crank shaft, and the guides, in one piece, the lower edge of the said
bed being stiffened by a flange, as well as the upper edge. The upper flange of
the bed for a portion of its length is planed, and forms the guide for the cross
head.
We place the eccentric sheave between one of the crank shaft bearings and the
crank, and we cast a hole in the side of the bed to allow the excentric rod to pass
through.
We bolt the feed pump to the back of the steam chest and actuate the plunger of
the feed pump by the slide valve spindle which is carried through a stuffing box at
the back of the steam chest.
We construct the connecting rod of cast steel, having in section the figure of the
letter H, the small end being bored out for the brasses of the cross head pin. The
front brass has a projection cast on it which fits a corresponding groove in the
connecting rod. Two screws tapped into lugs on the connecting rod bear on the said
projection of the front brass, and are used for taking up the wear of the brasses.
We construct the cross head of cast steel, a strong pin being cast on the upper side

page_text: of the said cross head; on the said pin the lower guide slipper is placed, and on
this the upper slipper, lock nuts being afterwards screwed on for the purpose of
taking up the wear.
The pin described on the cross head is cast hollow, and serves the purpose of an
oil cup or lubricator.
Any form of governor may be used with this steam engine, but we adopt by
preference the arrangement of governor patented by James Tangye on the 15th day
of June 1869, No. 1846.
Our Invention consists further of a combined foundation template and oil-drip
catcher. We make the said combined foundation template and oil-drip catcher
by cutting it out of sheet metal and give it the same figure, as the bed of the
engine holes being cut in the said template for the holding-down bolts to pass
through.
We form a depression or basin by dishing the template at that part situated
beneath the crank of the engine to receive the waste oil from the crank pin, guides,
and other lubricated parts.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said George Tangye and Henry Cherry in the Great Seal Patent Office
on the 14th November 1877.
GEORGE TANGYE, of the Firm of
Tangye Brothers, of Birmingham, in the County
of Warwick, Manufacturers, and HENRY CHERRY, of Aston, near Birmingham
nforesaid, Mechanical Engineer. IMPROVEMENTS IN STEAM ENGINES."
25
Our Invention consists of the construction and arrangement or combination of
the parts of steam engines herein-after described, whereby simplicity of construction
and compactness of the parts and economy in manufacture are obtained.
According to our Invention we cast the bed, the front cylinder cover, the two
bearings of the crank shaft, and the guides in one piece, the lower edge of the said
bed being stiffened by a flange, as well as the upper edge. The upper flange
of the bed for a portion of its length is planed, and forms the guide for the cross
head.
We place the eccentric sheave between one of the crank shaft bearings and the
crank, and we cast a hole in the side of the bed to allow the eccentric rod to pass
through.
We bolt the feed pump to the back of the steam chest and actuate the plunger of
the feed pump by the slide valve spindle which is carried through a stuffing box at
the back of the steam chest.
We construct the connecting rod of cast steel, having in cross section the figure
of the letter H, the small end being bored out for the brasses of the cross head pin.
The front brass has a projection cast on it which fits a corresponding groove in the
connecting rod. Two screws tapped into lugs on the connecting rod bear on the
said projection of the front brass, and are used for taking up the wear of the brasses.
We construct the cross head of cast steel, a strong pin being cast on the upper side
of the said cross head. On the said pin the lower guide slipper is placed, and on
this the upper slipper, lock nuts being afterwards screwed on for the purpose of
taking up the wear.
The pin described on the cross head is cast hollow, and serves the purpose of an
oil cup or lubricator.
L

page_text: Any form of governor may be used' with this steam engine, but we adopt by
preference the arrangement of governor patented by James Tangye on the 15th day
of June 1869, No. 1846.
Our Invention consists further of a combined foundation template and oil-drip
catcher. We make the said combined foundation template and oil-drip catcher
by cutting it out of sheet metal and give it the same figure as the bed of the
engine, holes being cut in the said template for the holding-down bolts to pass
through.
We form a depression or basin by dishing the template at that part situated
beneath the crank of the engine to receive the waste oil from the crank pin, guides,
and other lubricated parts.
We will now describe, with reference to the accompanying Drawings, the manner
in which our Invention may be carried into effect.
Figure 1 represents in plan a horizontal steam engine containing our improve-
ments; Figure 2 is a vertical transverse section of the bed of the engine, showing
the guides for the cross head to work in; Figure 3 is a sectional elevation of tho
connecting rod and cross head of the same detached; Figure 4 is a horizontal
section, partly in plan, of the same; Figure 5 is an end elevation, partly in trans-
verse section, of the same, the said section, Figure 5, being taken on the line 1, 2,
Figures 3 and 4; and Figure 5ª is a transverse section of the connecting rod;
Figure 6 represents a plan of the combined foundation template used in conjunction
with the bed of the engine; and Figure 7 is a section of the same taken on the
line 3, 4, Figure 6.
Figures 3, 4, 5, and 5ª are drawn to a larger scale than the other Figures.
a, Figures 1 and 2, is the bed of the steam engine provided with the front
cylinder cover b and the two bearings c, c¹, of the crank shaft d, d', the said bed a,
cylinder cover b, and bearings c, c¹, being cast in one piece. The lower edges of the
bed a are strengthened by the outer flanges f, f, and the upper edges by the inner
flanges g, g. The upper flanges g, g, are planed for a portion of their length, and
form the guides e, e, for the cross head to work in. The said guides c, c, are best
seen in the cross section, Figure 2; is the eccentric or eccentric sheave on the
crank shaft d, d', and m is the eccentric rod by which the slide valve of the engine
is worked. The said eccentric or eccentric sheave is situated between the bearing c
of the crank shaft and the crank d', as seen in Figure 1. A hole is cast in the
side of the bed a for the eccentric rod m to pass through. n, Figure 1, is the feed
pump of the engine, which is bolted to the back of the steam chest p; a horizontal
section of the feed pump n and parts connected therewith is shown at Figure 1a;
n' is the plunger of the feed pump n, which plunger is actuated by the slide valve
spindle m, which said spindle m¹ is carried through a stuffing box at the back of
the steam chest p. The connecting rod 7 of the steam engine is shown on a
larger scale in Figures 3, 4, 5, and 5ª, and its construction will be best understood
by an examination of the said Figures. The said rod q is made of cast steel, and
has in cross section nearly the figure of the letter H, as seen in the cross section,
Figure 50, and the small or inner end of the said rod q is bored out for receiving
the brasses and of the cross head pin 8. The front brass has a projection t
cast upon it, which projection fits into a corresponding groove or recess in the rod q
(see Figure 3). Two screws n, n, take into the tapped lugs n', n', on the connecting
rod, and the inner ends of the said screws bear on the projection t, and serve for
taking up the wear of the brasses 1, 72. The cross head h, which is jointed to the
rod q, is made of cast steel, and has on its upper side a strong pin v cast in one piece
with the said cross head. On the said pin v the lower guide slipper wand the
upper guide slipper x are placed, and on the screwed end of the pin v the lock
nuts y, y, are screwed for taking up the wear. The pin is cast hollow, as best
seen in Figure 5, and serves the purpose of an oil cup or lubricator.
The combined foundation template and oil-drip catcher constituting part of our
Invention is represented in the plan, Figure 1, and separately in plan in Figure 6,
and cross section in Figure 7, taken on the line 3, 4, of Figure 5.
The said

page_text: combined foundation template and oil-drip.catcher is marked j, and is cut from
sheet metal, and has the shape of the bed a of the engine, as seen in Figure 1. The
said plate j is fixed beneath the said bed a and by the same screw bolts a², by which
the bed is fastened down, the said bolts a passing through the holes i, i, cut in the
said foundation plate j. In the said foundation platej a depression or basin is
nade by dishing out the template at the part situated beneath the crank d¹ of the
engine, for the reception of the waste oil from the crank pin and the guides and
other lubricated parts.
Having now described the nature of our Invention, and the manner in which the
same is to be performed, we wish it to be understood that we claim as our Invention
of "Improvements in Steam Engines,"-
First. Casting the bed, the front cylinder cover, and the bearings of the crank
shaft in one piece, the top flanges of the said bed forming the cross head guides,
substantially as herein-before described and illustrated in Figures 1 and 2 of the
accompanying Drawings.
Secondly. Arranging the feed pump relatively to the steam chest, and actuating
the plunger of the said feed pump, substantially in the manner herein-beforo
described and illustrated in Figures 1 and 1ª of the accompanying Drawings.
Thirdly. The construction and arrangement of the parts of the connecting rod,
substantially as herein-before described and illustrated in Figures 3, 4, 5, and 5ª of
the accompanying Drawings.
Fourthly. The construction and arrangement of the parts of the cross head, sub-
stantially as herein-before described and illustrated in Figures 3, 4, and 5 of the
accompanying Drawings.
Fifthly. The combination in a steam engine of a connecting rod and cross head,
constructed and arranged substantially in the manner herein-before described and
illustrated in the accompanying Drawings.
Sixthly. The adaptation to a steam engine of a combined foundation template
and oil-drip catcher, substantially as herein-before described and illustrated in
Figures 1, 6, and 7 of the accompanying Drawings.
Lastly. The general arrangement and combination of the parts of a steam
engine, substantially as herein-before described and illustrated in the accompanying
Drawings.
In witness whereof, I, the said George Tangye, have hereunto set my hand
and seal, this Tenth day of November, in the year of our Lord One thousand
eight hundred and seventy-seven.
Witness,
W. J. PARKINS,
18, Lozells St.,
Birmingham,
GEORGE TANGYE. (L.S.)