AN IMPROVED LUBRICATOR
Year: 1887

page_text: Date of Application, 19th Sept., 1887
Complete Specification Left, 15th May, 1888
Complete Specification Accepted, 7th Sept., 1888
I, JAMES STEVENSON of Grays Inn Chambers 20 High Holborn in the County of
Middlesex, Civil Engineer, do hereby declare the nature of said invention for "AN
IMPROVED LUBRICATOR a communication to me from abroad by Carl Andersson of
Copenhagen in the Kingdom of Denmark, Engineer to be as follows:-
,,
This invention has reference to a lubricator in the form of an oil pump, for lubricating
the cylinders and sliding parts of steam engines. The invention is based upon the
principle that the oil is forced into the steam pipe and passes with the steam to those
parts of the engine which it is desired to lubricate.
Referring to the accompanying drawings, Fig. 1 is a side view & Fig. 2 a plan of
the lubricator of this invention. Fig. 3 a horizontal section through the axis of the
pump and Figs. 4 and 5 shew details of the driving mechanism.
The pump consists of a casing A having two chambers B, C (Fig. 3) respectively
for the plunger B₁ and a slide block D. They are in communication with each other
through aperture a which is alternately opened and closed by the slide D which by
means of a screw is pressed close against the surface against which it slides. The
chamber C is in communication with a container E (Fig. 1) charged with the lubricating
oil through a wire gauze top F. placed in a frame so as to be readily removable as by
means of handle f. The oil passes from the container E into the chamber C then
through the aperture a-when this is not shut off by the slide D-into the plunger
chamber B in front of the plunger B₁ moving therein which in its forward stroke,
and whilst the slide D closes the aperture a, forces the same through the valve
chamber into the steam pipe, the valve d which is kept pressed against the plunger
chamber by a spring, opening by the pressure of the oil. Upon the backward stroke
of the plunger B₁ the force of the spring e in conjunction with the steam pressure
closes the valve d, and fresh oil will then flow into the plunger chamber B so soon as

page_text: the slide D shall have moved away from the aperture a. The slide rod D¹ and
plunger B which respectively move.through stuffing boxes G, H, are each in
connection with an eccentric through rods J, K, both eccentrics being mounted on the
same shaft L, and between them also on L the ratchet wheel M which is engaged by
a pawl O fitted to lever N. This latter may be turned freely on the shaft L and when
alternately raised and lowered by its outer end causes the ratchet wheel M and there-
with the shaft L and eccentric blocks to turn round whereupon the to and fro
motion of the slide D and plunger B¹-necessary for the working of the pump-is
produced.
Dated this 13th day of September 1887.
JAMES
STEVENSON,
Gray's Inn Chambers,
20, High Holborn, London, W.C.

page_text: I, JAMES STEVENSON of Grays Inn Chambers, 20 High Holborn in the County of
Middlesex, Civil 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:-
This invention has reference to a lubricator in the form of an oil pump for lubricating
the cylinders and sliding parts of steam engines.
The invention is based upon the principle that the. oil is forced into the steam pipe
and passes with the steam to those parts of the engine which it is desired to
lubricate.
Referring to the two sheets of drawings accompanying my Provisional Specification
and to sheet 3 appended herewith, the pump consists of a casing A having two
chambers BC (Figure 3) respectively for the plunger B¹ and a slide block D. Said
chambers are in communication with each other through an aperture a alternately
opened and closed by the slide D, which, by means of a screw bis pressed close against
the surface against which it slides. The chamber C is in communication with a
container E Figure 1 charged with the lubricating oil through a wire gauze top F
placed in a frame so as to be readily removable by means of the handle f. The oil
passes from the container E into the chamber C, then through the aperture a,-when
this is not shut off by the slide 1), into the plunger chamber B in front of the
plunger B moving therein, which, in its forward stroke, and whilst the slide D closes
the aperture a forces the saine through the valve chamber 7 into the steam pipe, thé
valve d which is kept pressed against the plunger chamber by a spring e opening by
the pressure of the oil. Upon the backward stroke of the plunger B₁ the force of the
spring e in conjunction with the steam pressure closes the valve d, and fresh oil will
then How into the plunger chamber B so soon as the slide D shall have moved away
from the aperture a.
The slide rod D₁ and plunger B₁ which move respectively through the stuffing
boxes G, H, are each connected with an eccentric by means of the rods J, K, said
eccentrics being mounted on the same shaft L, and between them the ratchet wheel M
which is engaged by a pawl O fitted to the lever N. This latter may be turned
freely on the shaft L, and when alternately raised and lowered, causes the ratchet
wheel M and therewith the shaft L and eccentric blocks to turn round, whereupon
the slide rod D₁ and plunger B² are set in motion in such a manner that the
slide D closes the aperture a while the plunger B is forced forward. In this
action the slide D moves forward and backward a distance equivalent to the breadth
thereof, always covering the aperture a. On the other hand the slide rod D₁ leaves
the aperture a open when the plunger B' is drawn outward, so that during this
interval the oil can pass from the chamber C into the chamber B. the slide again
moving the distance above mentioned first backward and then forward to cover the
aperture a.

page_text: The quantity of oil which passes into the machine may be varied by the following
alteration in the alternative movement of the slide rod D₁ and plunger B¹. The
plunger B moves backward sufficiently to allow of the oil passing into the chamber B
through only a part of the aperture a, and then on moving forward again allows the
oil to pass back into the chamber C through a part only of the aperture a. To obtain
this effect, the eccentric (Figures 6 and 7) which drives the slide rod D' and moves
freely on the shaft L has a semi-circular slot P formed therein, as shown in Figure 6.
Into said slot P is inserted a span bolt R provided with a nut and secured to the
ratchet wheel M, so that the eccentric can both rotate and be secured in different
positions.
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 1
claim is :-
with
First The improved lubricator comprising a casing having chambers B and C
for a plunger B¹ and slide block D respectively. The chamber C being connected with
an oil container E provided with a gauze filter F and aperture a between the
chambers B and C, said chamber B again communicating by the valve chamber
the steam pipe of the machine, so that oil is forced by the plunger B₁ into the
steam which passes to the machine substantially as herein described and shown
in the drawings.
Second: In the improved lubricator referred to in the preceding claim the
employment of an eccentric having a semi-circular slot P into which a span bolt
is inserted and secured to the ratchet wheel whereby said eccentric can be adjusted
to that which is fixed on the shaft L for the movement of the plunger substantially
as and for the purposes herein described.
Dated this Ninth dox of Max 1000
JAMES STEVENSON,
Gray's Inn Chambers,
20, High Holborn, W.C.