Year: 1898

page_text: Date of Application, 9th Aug., 1898
Complete Specification Left, 28th Apr., 1899-Accepted, 1st July, 1899
I, THOMAS MERRETT AXFORD, of 9, London Street, Fenchurch Street, London,
E.C., Engineer, do hereby declare the nature of this invention to be as follows:--
My invention has reference to sight-feed lubricators such as used for slide
valve and piston lubrication and which, as is well known, comprise an oil chamber
and a sight feed with regulating valve, the oil chamber being connected by a
pipe controlled by a cock with a condenser that receives steam from the steam
main, condenses it, and conducts the resulting water to the oil chamber; the
sight feed being connected by another pipe, also controlled by a cock, with (so
as to conduct oil to) the steam main; and the oil chamber being supplied with
oil from a suitable source of supply such as a cup also controlled by a cock.
Now according to this invention the plugs or valves of the said three cocks
are so connected that they are all actuated simultaneously by the movement of
a single handle and that when the cock which controls the charging of oil to the
oil chamber is shut the other two will be open and vice versa.
For this purpose according to one arrangement the three plugs or valves, with
their passages arranged so that one shall be closed when the other two are open
and vice versa, as aforesaid, are provided each with an arm for operating it, these
three arms are connected together, by a connecting rod or link, which is jointed
to two of them, whereas the third arm which is provided with a handle is formed
with a slot in which works a piu carried by the connecting rod and which may
be kept in place by a fly nut.
The details are susceptible of modification.
I, THOMAS MERRETT AXFORD, of 9, London Street, Fenchurch Street, London,
E.C., 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 sight-feed lubricators such as used for slide
valve and piston lubrication, and which, as is well known, comprise an oil chamber

page_text: and a sight feed with regulating valve, the oil chamber being connected by a
pipe controlled by a cock with a condenser that receives steam from the steam
main, condenses it, and conducts the resulting water to the oil chamber; the
sight feed being connected by another pipe, also controlled by a cock, with (so
as to conduct oil to) the steam main, and the oil chamber being supplied with
oil from a suitable source of supply, such as a cup also controlled by a cock.
Now according to this invention the plugs or valves of the said three cocks
are so connected that they are all actuated simultaneously by the movement of
a single handle and that when the cock which controls the charging of oil to the
oil chamber is shut the other two will be open, and vice versa.
In the accompanying illustrative drawings,
Fig. 1 shows a front elevation of a sight feed lubricator according to this
invention,
Fig. 2 shows a side elevation thereof; and
Fig. 3 shows a detail.
Fig. 4 shows a front elevation of a modified construction of the improved sight
feed lubricator and Fig. 5 a side elevation of the same.
In the arrangement illustrated in Figs. 1 to 3 inclusive, 1, 2 and 3 are three
cocks whose plugs or valves control the admission and emission of water and oil.
The plug or valve of 1 controls admission of oil from cup 4 into the oil
chamber 5 the plug or valve of 2 controls the entrance of water to the oil
chamber 5 from the pipe 6 (which leads from the condenser) via the passage 5ª.
The plug or valve of 3 controls the escape of oil from the sight feed 8 to the
steam main. The passages through the plugs or valves (are as shown dotted) so
arranged that the way through cock 1 will be closed when the ways through the
other two cocks 2 and 3 are open and rice versa. 9 is an arm rigidly attached to
the plug or valve of cock 1; 10 and 11 are other arms one rigidly attached to the
plug or valve of cock 2; the other to the plug or valve of cock 3; the three
arms are connected together by a connecting rod 12 as follows: The said rod
or cock is jointed to the arms 10 and 11; but the other arm 9, which has a
handle 9, is formed with a slot 9b in which works a pin 13 that passes through
a slot 12" (Fig. 3) in the connecting rod 12 and is kept in place by a nut 13.
As represented in Fig. 1, cock 1 is closed; cocks 2 and 3 are open. On the
arm 9 being moved by the handle 9" from the position shown in Fig. 1, cocks 2
and 3 will be closed and cock 1 will be opened. If now the drain cock 14 be
opened so as to allow of the escape of water, oil can pass through cock 1 from
the oil cup 4 into the oil chamber 5. On returning arm 9 to the position repre
sented in Fig. 1, cock 1 will be closed and cocks 2 and 3 opened, thus allowing
water to enter the lower part of the oil chamber 5 through the passage 5" and oil
pass through cock 3 into the steam main to lubricate slide valves and pistons.
The details are susceptible of modification.
In the modified arrangement shown by Figs. 4 and there are substituted for
the cocks 2 and 3 (Figs. 1 and 2) two valves 2 and 3 adapted respectively to
close the inlet 2b and the outlet 3b and each valve is furnished with a spring
tending to close the valve; the spindles 2º, 3º of these valves pass through stuffing
boxes 2, 3d and each spindle is screw threaded at its outer end and secured by
nuts to one end of a small cross head 12 or 12° whose other end is attached to
one end of a connecting rod 12d or 12° the other ends of these rods being con-
nected by pin and slot connections to the plug of cock 1 which is furnished with
an operating handle 9. Fig. 4 shows valves 2" and 3" open and cock 1 closed.
On handle 9 being moved slightly towards the right, the pins 13 and 13° will
be released by the partial movement of the slots 12 and 12% in a rotary sense
and the valves 2 and 3 will be promptly closed by their respective springs whilst
by continuing the movement of handle 9" through 90° cock 1 will be completely
opened. 15 is a bracket secured to the bottom of the oil chamber 5 and carrying
apin 15 on which is a ferrule 15b, provided with a slot with which the end

page_text: of the arm 9 can be engaged and held in the position shown in Fig. by turning
the ferrule 15b through a quarter of a turn.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, I declare that what
I claim is:
1. A sight feed lubricator in which the cock plugs or valves that control respec-
tively admission of oil to the oil chamber, admission of water to the oil chamber
and outflow of oil from the sight feed are so connected together that movement
of a single handle will cause the closing of the cock or valve which controls
admission of oil to the oil chamber and the opening of the other two cocks or
valves and vice versa, substantially as described.
2. Sight feed lubricators wherein opening and closing of the cocks or valves
is controlled by means of a handle connected to the several valves substantially
as described with reference respectively to and shown in Figs. 1 and 2 and in
Figs. 4 and 5 of the accompanying drawings.
Dated this 28th day of April 1899.
For the Applicant,
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C.,
Chartered Patent Agent.