Year: 1888

page_text: Date of Application, 31st Mar., 1888
Complete Specification Left, 31st Jan., 1889
Complete Specification Accepted, 2nd Mar., 1889

page_text: T. Gland.
U. Shaft coupling.
It will be seen by the drawings that these pumps are single acting, and that the
actuating parts of the pump are enclosed in a gas tight caseing, and that the actuation
is effected by a shaft rotating in the gland packing, in contra-distinction to the usual
reciprocating motion of piston rod through packing.
The actuating shaft (K) first passes through a stuffing box then through a vacant
space which forms the sealing chamber (Q.) thence through the inner bearing (R) and
is coupled to the crank within the caseing.
The crank as shown has two substantial bearings, surmounting suitable stands,
cast on the caseing; but in some instances, especially in the smaller sizes, it is found
desirable to have an overhung crank having suitable bearing in the caseing cover (B).
The lower end of the cylinder forms the guide ways for a trunk piston, which is
connected to the crank by a connecting rod.
The piston (M.) is hollow and contains the inlet valve (O.) which has seating on
the junk ring of the piston. The valve box (E) forms the cover to the cylinder, and
is so arranged at the cylinder end as to form or hold a seating for the discharge
valve (P.).
The gas enters the caseing through the inlet opening and thence into the top of
the cylinder under the inlet valve (0.) and when compressed is discharged from the
side of the valve box, through the discharge opening (H).
Sealing oil is maintained in the caseing at suitable height to entirely cover the
crank shaft which prevents the escape of gas while the packing only requires to be
compressed sufficiently to prevent the escape of oil. By this provision all bearings
are constantly submerged in oil, and the crank pin dips in oil at each revolution,
thereby working with the very minimum of friction, and any slight leak that be
may
past the piston rings causes only loss of efficiency, but not loss of gas.
1 1000

page_text: COMPLETE SPECIFICATION.
Improvements in Compression Pumps for Gaseous Fluids.
I, JOSEPH KNIGHT KILBOURN, a citizen of the United States, but now residing in
Bootle, Lancashire, Engineer 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 :-
My improvements relate to pumps used in compressing gaseous fluids.
In condensing these gases more especially those of high tension, there has always
been great difficulty in retaining the gas in the machine, particularly in preventing.
its escape by, or through the packing of the piston rod, without excessive friction
caused by the reciprocating motion of the rod through the packing. The object of
this invention is to remove or minimize this difficulty, and to improve the minor
parts, which, when combined, form the general arrangement shown and described.
In the accompanying drawings which form parts of this specification, Fig. 1, 2, & 3,
sheet 1, were left with the provisional specification.
Fig. 1. Sheet 1. is a a vertical elevation partly in section, and parallel to the crank
shaft.
Fig. 2. Sheet 1 is plan of same.
Fig. 3. Sheet 1 is vertical elevation of crank shaft end.
Fig. 4. Sheet 2. is a vertical sectional elevation of compression pump with overhung
crank.
Fig. 5. Sheet 2. is a plan of same.
A and A¹. The caseings containing crank, connecting rod, shaft, coupling, and
bearings.
B. Cover at shaft end.
B1 Cover at opposite end with bosses for oil gauge.
C Compression Cylinder.
D. Water jacket caseing enclosing the cylinder.
D' Opening for circulating water connection.
E. Discharge valve box.
F. Valve box cover.
G. Base plate.
H. Gas delivery opening.
I. Gas inlet opening.
J. Oil gauge.
K. Crank shaft.
L. Crank.
L' Crank Bearing.
L" Overhung Crank pin.
M. Trunk piston.
N. Connecting Rod.
O. Inlet Valve.
P. Discharge valve, which may be a mushroom valve as shown or a disc valve
working over a grid.

page_text: X. Collar on inlet valve.
Y. Pin through collar X.
Z. Valve spring.
It will be seen by the drawings that these, pumps are single acting, and that the
actuating parts of the pump are enclosed in a gas-tight caseing, and that the actuation
is effected by a shaft rotating in the packing in gland box (S.) in contra-distinction
to the usual reciprocating motion of piston rod through packing. The actuating
shaft (K) first passes through a stuffing box, then through a vacant space which forms
the sealing chamber (Q), thence through the inner or fixed bearing (R) and is coupled
to the crank within the casing.
The crank (L. Fig. 1. Sheet 1.) as shown, has two substantial bearings (L)
surmounting suitable stands cast on the caseing, but in some instances, especially in
the smaller sizes, it is found desirable to have an overhung crank as shown (L)
(Fig. 4. sheet 2) having suitable bearing in the caseing cover (B)..
The lower end of the cylinder forms the guideways for a trunk piston (M), which
is connected to the crank by a suitable connecting rod. It is essential that a piston
valve should be so arranged that it cannot get adrift, it is also desirable that its
arrangement admits of its removal without serious difficulty.
The peculiar construction of the piston (M) shown on Fig. 4. sheet 2. provides for
such arrangement.
By referring to the drawing, it will be seen that the piston is hollow, with
connecting rod pin at lower end, the upper part containing the inlet valve (O), which
has its seating on the junk ring (V) as shown. The junk ring is threaded on to
upper end of piston, and holds in position the shouldered sleeve (W). The inlet
valve (O) is also hollow, and open at its lower end ; the collar X is threaded on to the
lower end of this valve, and is further secured by the pin (Y). The spring (Z) is
slightly compressed, and secured between the collar (X), and the lower end of sleeve
as shown. There are longitudinal grooves formed in the periphery of the valve stem
above the collar (X), and connected by holes with the central opening of the valve,
these grooves and the central opening all forming gas passages to the upper part of the
valve directly under the seating. As will be readily seen, the valve cannot get adrift,
and may be taken out by unscrewing junk ring. The valve box (E) forms the cover
to the cylinder, and also to a caseing (D) enclosing the upper portion of cylinder,
which is of such diameter as to leave annular space for water jacket. This valve
box (E) is so arranged as to hold or form a seating for the discharge valve (P).
This valve as shown will be understood without further explanation.
The lower part of the caseing (A), and sealing chamber (Q) is filled with a suitable
liquid which is also a lubricant, and maintained at such a height as to entirely cover
the crank shaft, and thereby prevent the escape of the gas. By this arrangement the
packing has only to be compressed to prevent the escape of the sealing liquid.
The sealing liquid is forced into the caseing (A) by a small hand pump not shown.
By the aid of the gauge (J.) the height of this liquid inside the caseing, can be
readily determined. This gauge is of novel construction, but as it is the subject
matter for another patent, it is not here described.
The operation is as follows:-
The gas enters the caseing at I, and passes through and around the valve into
the cylinder above the piston, is compressed on the upward stroke, and discharged from
valve box (E) through the opening (H.) By this arrangement of admitting the gas

page_text: into the caseing (A or A¹) compression is aided to the extent of the pressure of the
incoming gas, under the entire area of the piston. While on the down stroke, the
inlet valve is of such area, that the pressure on top of the piston equals that of
the resisting pressure beneath it.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1st. The general arrangement of a compression pump for gaseous fluids, consisting
of a compression pump with jacketed cylinder surmounting a gas tight caseing
enclosing the crank, part of crank shaft, and connecting rod. A trunk piston, and
piston valve, a sealing chamber, gland box, and packing in which the actuating shaft
rotates, an oil or liquid gauge attached to the caseing substantially as described and
shown.
2nd. For a compression pump for gaseous fluids, having the actuating parts within
a gas tight caseing, a trunk piston & piston valve constructed substantially as described
and shown, and for the purpose set forth.
3rd. In a compression pump for gaseous fluids, having the actuating parts enclosed
within a gas tight caseing. The valve box (E) so arranged as to form a cover to the
cylinder & to the caseing around the cylinder, and the seating for the discharge valve,
substantially as described & shown.
4th. In a compression pump for gaseous fluids, surmounting a gas tight caseing so
arranged that its upper portion forms the receiving chamber for the incoming gas,
substantially as described and shown, and for the purpose set forth.
Dated this 30th day of January 1889.
JOSEPH KNIGHT KILBOURN.