Improvements in Gas Compressors, especially suitable for Refrigerating Machines.
Year: 1894

page_text: Date of Application, 26th Apr., 1894
Complete Specification Left, 28th Jan., 1895-Accepted, 2nd Mar., 1895
PROVISIONAL SPECIFICATION.
Improvements in Gas Compressors, especially suitable for
Refrigerating Machines.
I, Sir ALFRED SEALE HASLAM, Knight, of the Union Foundry, Derby, in the
County of Derby, do hereby declare the nature of this invention to be as
follows:-
The objects of this invention are to prevent the gas from escaping or coming
into contact with the air and to avoid dead spaces in the apparatus; it is applicable
particularly to compound compressors in which the gas is compressed in stages.
The compressor as I prefer to construct it has two single acting pumps arranged
tandem with each other. The compression ends of the two pump cylinders are
next each other and have between them a central chamber containing a lubricating
and sealing liquid supplied from a raised reservoir through which the gas to be
compressed also passes. The central chamber is separated from the cylinders by
glands through which the common piston rod passes. The other end of the low
pressure cylinder has a similar chamber also supplied with the sealing and lubri-
cating fluid out through which the piston rod passes. Each cylinder has at its
compression end a suction valve chamber and a delivery valve chamber. The
suction valve chamber of the low pressure cylinder is connected by a pipe to the
reservoir and so to the refrigerator or other source of the gas whilst its delivery
valve chamber is connected to the suction valve chamber of the high pressure
cylinder the delivery valve chamber of the latter being connected with a receiving
and separating vessel.
The action of the machine is as follows:-After adjusting the glands of the
receiving and separating vessel, I charge it and the central chamber with lubricating
and sealing fluid, to a suitable height. I then draw the gas through the supply pipe
accompanied by the requisite amount of sealing fluid which I admit by a cock or
valve into the low pressure cylinder through the suction valve and compress the
same to the desired pressure. Or as an alternative arrangement oil may be injected
or delivered by a separate pipe or communication to the compression side of one or
both cylinders when the delivery valve opens and the charge passes on to the
suction valve chamber of the high pressure cylinder where the compression is
completed, and the charge passes through the delivery valve to the receiving and
separating vessel wherein the gas and lubricating and sealing fluid is separated;
the gas rising and passing out to the condenser of the refrigerator or other
receptacle, whereas the lubricating and sealing fluid falls, and is again transmitted
to the central chamber. The fluid may be cooled in a suitable receptacle placed
between the separating vessel and central chamber. The height of the fluid in
reservoir is such as to effectually seal and lubricate the stuffing boxes or glands.
Dated this 25th day of April 1894.

page_text: Improvements in Gas Compressors, especially suitable for
Refrigerating Machines.
I, Sir ALFRED SEALE HASLAM, Knight, of the Union Foundry, Derby, in the
County of Derby, 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 objects of this invention are to prevent the gas from escaping or coming
into contact with the air and to avoid dead spaces in the apparatus; it is applicable
particularly to compound compressors in which the gas is compressed in stages.
The compressor as I prefer to construct it is shown in vertical section and plan
at Figures 1 and 2. It has two single acting pumps a and b arranged tandem with
each other. The compression ends of the two pump cylinders are next each other
and have between them a central chamber c containing a lubricating and sealing
liquid supplied from a raised reservoir (not shown in the drawings) through which
the gas to be compressed also passes. The central chamber c is separated from the
cylinders by glands d and e through which the common piston rod passes. The
other end of the low pressure cylinder a has a similar chamber g also supplied
with the sealing and lubricating fluid out through which the piston rod passes.
Each cylinder has at its compression end a suction valve chamber a¹ and bl
respectively and a delivery valve chamber a² and respectively. The suction
valve chamber a¹ of the low pressure cylinder is connected by a pipe to the
reservoir and so to the refrigerator or other source of the gas whilst its delivery
valve chamber a is connected by the pipe to the suction valve chamber 61
of the high pressure cylinder the delivery valve chamber 62 of the latter being
connected by the pipe with a receiving and separating vessel k.
The action of the machine is as follows:-After adjusting the glands of the
receiving and separating vessel k 1 charge it and the central chamber c with
lubricating and sealing fluid, to a. suitable height, I then draw the gas through
the supply pipe accompanied by the requisite amount of sealing fluid which I admit
by a cock or valve into the low pressure cylinder a through the suction valve a¹
and compress the same to the desired pressure. Or as an alternative arrangement
oil may be injected or delivered by a separate pipe or communication to the
compression side of one or both cylinders when the delivery valve opens and the
charge pusses on to the suction valve chamber of the high pressure cylinder where
the compression is completed, and the charge passes through the delivery valve to
the receiving and separating vessel & wherein the gas and lubricating and sealing
fluid is separated, the gas rising and passing out to the condenser of the refrigerator
or other receptacle, whereas the lubricating and sealing fluid falls, and is again
transmitted to the central chamber c. The fluid may be cooled in a suitable
receptacle placed between the separating vessel and central chamber. The height
of the fluid in the reservoir is such as to effectually seal and lubricate the stuffing
boxes or glands.
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 :-
1. A pump cylinder having a chamber at one or both ends through which the
piston rod passes and which is kept supplied with lubricating and scaling liquid
from a reservoir through which the gas to be compressed also passes substantially
as described.

page_text: 2. Two single or double acting pumps arranged tandem to each other and with
the compression ends of their cylinders next each other and having between them a
chamber supplied with lubricating and sealing liquid through which their common
piston rod passes substantially as described.
3. Gas compressors substantially as described and shown in the drawings.
Dated this 26th day of January 1895.
A. SEALE HASLAM.