An Improved Automatic Lubricator for Low Pressure Engine Cylinders.
Year: 1892

page_text: Date of Application, 19th Sept., 1892
Complete Specification Left, 19th June, 1893-Accepted, 19th Sept., 1893
PROVISIONAL SPECIFICATION.
An Improved Automatic Lubricator for Low Pressure Engine
Cylinders.
I, WILLIAM HARGREAVES, of Whitewell Bottom, near Newchurch, Lancashire,
Manager, do hereby declare the nature of this invention to be as follows:-
The invention relates to automatic lubricators which are applicable to the
cylinders of steam engines of the low pressure type, and have for object the
lubrication by automatic means of such cylinders where the pressure therein, at one
part of the piston stroke, falls below the atmospheric line.
To accomplish this and to effect my improvements, I employ a reservoir for the
oil, provided by preference, with a syphon arrangement having sight feed ; but
various convenient forms of reservoir may be employed in connection with my
improvements. The usual valves may be provided so that the oil outflow can
be regulated approximately to any desired quantity per minute, as is well
understood.
I attach to the outflow end of the reservoir or feed, and between such and
the steam cylinder, a vessel, length of pipe, or other receptacle, having an
opening or openings to the atmosphere, and which fits into the cover or other
convenient part of such steam cylinder, and is provided with a small valve at
the connection thereto of such character that the pressure of steam within the
cylinder will close it, and thus prevent any escape; and when the pressure within
the cylinder falls below the atmospheric line, such valve will open and permit the
ingress of oil from the receptacle aforesaid.
Variations in detail may be made, such as the form of the reservoir and feed,
as also of the receptacle, without departing from the peculiar character of the
invention, which mainly consists in combining with a reservoir and feed, a
receptacle to be connected to a steam engine cylinder, and having communication
with the atmosphere, and provided with a valve capable of automatically opening
on the fall of pressure in the cylinder below that of the atmosphere, and closing
when such pressure rises above the atmospheric line.
WILLIAM GADD, C.E.,
64, Barton Arcade, Manchester, Agent for Applicant.
COMPLETE SPECIFICATION.
An Improved Automatic Lubricator for Low Pressure Engine
Cylinders.
I, WILLIAM HARGREAVES, of Whitewell Bottom, near Newchurch, Lancashire,
Manager, 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 invention relates to automatic lubricators which are applicable to the
cylinders of steam engines of the low pressure type, and have for object the
lubrication by automatic means of such cylinders where the pressure therein, at one
part of the piston stroke, falls below the atmospheric line.
To accomplish this and to effect my improvements, -I employ a reservoir for the
oil, provided, by preference, with a suitable arrangement having sight feed; but
various convenient forms of reservoir may be employed in connection with my
improvements. The usual valves may be provided so that the oil outflow
can be regulated approximately to any desired quantity per minute, as is well
understood.

page_text: I attach to the outflow end of the reservoir, or feed, and between such and
the steam cylinder, a vessel, length of pipe, or other receptacle, having an
opening or openings to the atmosphere, and which fits into the cover or other
convenient part of such steam cylinder, and is provided with a small valve at
the connection thereto of such character that the pressure of steam within the
cylinder will close it, and thus prevent any escape; and when the pressure
within the cylinder falls below the atmospheric line, such valve will open and
permit the ingress of oil from the receptacle aforesaid.
But that the improvements may be better understood, I will, with the aid of
the accompanying drawings, proceed more fully to describe means employed by me.
DESCRIPTION OF DRAWINGS.
Fig. 1 is an elevation, and Fig. 2 a sectional elevation at right angles thereto of
a lubricator arranged in accordance with my improvements.
The same letters indicate corresponding parts wherever they occur.
a is the reservoir for the oil, which may be supplied in the usual, or any
convenient manner, and b is a tube or passage connecting such reservoir with
the chamber or receptacle c, which latter is divided for convenience into two
compartments c', c², although, if desired, the portiou may be dispensed with, and
the tube connected directly with the sight feed k. k. The upper compartment, c',
is open to the atmosphere, as shewn by the passage ³, in the cover or lid; and it
also has communication with the cylinder d, through the tube e, so long as the
valve 9, working in the seating h, is open.
k. k. is the sight feed attachment, which may be of any suitable description, and
which is employed by preference, though other methods of feeding from the
reservoir may be employed, if desired, in combination with my improvements.
The action of the apparatus as shewn in the drawings is as follows:-
:
The oil from the reservoir a, flows through the tube b into the compartment cof
the vessel c, whence it passes, through the water in the crdinary sight-feed attach-
ment k, k, being regulated by the screw-valve k-into the upper compartment c',
falling into the perforated cup h', over the valve seating h.
Whilst the pressure of steam in the cylinder is above that of the atmosphere,
the valve g. will remain closed; but as soon as the steam pressure falls below the
atmospheric line, the valve opens, and the oil is forced, by the pressure of air
above, down the tube e, into the cylinder, where the desired lubrication is effected.
A suitable strainer or strainers for the oil may be employed at convenient parts
of the apparatus, and variations in detail may be made, such as in the form of the
reservoir and feed, as also of the receptacle or vessel c, without departing from the
peculiar character of the invention.
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
An automatic lubricator for low pressure engine cylinders, formed with a
reservoir and feed, combined with a receptacle which has communication with the
atmosphere, and the interior of the cylinder, such communication being controlled
by a valve capable of automatically opening, for the passage of oil to the cylinder,
on the fall of pressure in such cylinder below that of the atmosphere, and closing
when such pressure rises above the atmospheric line, in manner substantially as
herein shewn and described.
1000
WILLIAM GADD, C.E.,
64, Barton Arcade, Manchester, Agent.