IMPROVEMENTS IN SIGHT FEED LUBRICATORS
Year: 1884

page_text: I, JOHN GRANROTH, residing at Number Five Morton Terrace, Greenock in the
County of Renfrew, Engineer do hereby declare the naturo of my invention for
IMPROVEMENTS IN SIGHT FEED LUBRICATORS to be as follows:-
It will simplify and render more reliable and effective the lubricating of all
descriptions of machinery & for which lubrication is necessary as the amount of
pressure can be increased or decreased to any necessary extent; it may be placed
in such a position for lubricating any kind of machinery or bearings as to cause
no inconvenience, no outside pipes or condensors, as at present in use, being
required; and it will work effectively at a much less expenditure of oil.
This lubricator can be attached to any kind of machinery most conveniently by
either a bent or a straight socket pipe, it can be applied to steam pipes, jackets
of slide valves and journals or shaft bearings on account of its being fed from the
centre below the lubricator. The one return lubricating (A 5) is placed inside
the other (A 11) as shown on the accompanying plan on Figure 1 where the
pipe A 5 carries the oil which it receives from cisetrn A 4 into pipe A G whenco
it flows through adjusting crane A 7 up through sight tube AS to connection
pipe A 10. The cistern at the top (A 9) being filled with air or steam acts as an
expander and condenser and modifies the flow of the oil through pipe A 10 into
pipe A 11. The oil passes through pipe A 11 to injecting valve B 2 which opens
when condensation has taken place in pipes A 10 and A 11 and cistern A 9.
The spindle B 1 has at the top a valve (B 3) which is forced up by the steam
relieved by the opening of injecting valve B 2 and thus gives the oil time to pass
through valve B2 into the machinery for the purpose of lubricating. At valvo B3
there is an air pipe leading to the exterior of the lubricator at B 4, which, by means
of a small hand crane regulates the action of valve B 3.
The steam pressure passes from the main pipe A 13 through pipe C 1 and
adjusting cock D 3 into bent pipe C 2 which leads it up to the top of cistern A 4,
then down below the partition between A 4 and C 4 and up through injector C3
into air cistern C 4. The partition between C 4 and A 4 can, if desired, be carried
down to the bottom of the lubricator below cock D 3, and a communication between
the cisterns A 4 and C 4 can be formed by turning cock D 3. The pressure of the
air in C 4 combined with the pressure of the steam injected at C 3 is equal to
the pressure exerted to drive the oil in A 4 into pipe A 5 and so on as described
above,

page_text: Within injector C 3 is a ball which works so as to stop the rush of condensed
water into pipe C 2.
For the purpose of lubricating bearings, whether steam is or is not required, the
air in cistern C 4 is compressed by means of additional air being introduced,
and forced, by an injector at pipe D 2 and passed through crane D 3 into
cistern C 4.
An easily evaporating liquid, such as liquid ammonia, benzolo, bisulphid of
carbon & may be injected at D 2 in the same manner as the air immediately
above described so as to produce evaporation in C4 in proportion as the pressure
of air and the lubricating oil decrease.
When continued lubrication is desired without filling the lubricator by cock A 1,
a connection can be made through pipe E 1 for conveying oil through the lubricator
from a vessel placed at a higher level.

page_text: COMPLETE SPECIFICATION.
I, JOHN GRANROTH, residing at Number Five Morton Terrace, Greenock do
hereby declare the nature of my said invention for IMPROVEMENTS IN SIGIT
FEED LUBRICATORS and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :-
This Lubricator can be attached to any kind of machinery most conveniently by
either a beat or a straight socket pipe; it can be applied to steam pipes, jackets
of slide valves and journals or shaft bearings on account of its being fed from the
centre below the Lubricator. The one return lubricating pipe A 11 is placed inside
the other A 5 as shown on the accompanying plan in Fig. 1 where the pipo A 5
carries the oil which it receives from cistern A 4 into pipo A 6 whence it flows
through adjusting crane or valve A 7 up through sight tube A. 8 to connection
pipe A 10. Resting on the top of sight tube A 8 is a brass packing gland with
collar pointing downwards and an upper brass packing gland with collar pointing
both upwards and downwards, upwards into cistern A 9, and downwards to, and
pressing against the uppermost part of the lower gland, thus packing both ways.
The downward collar of the upper gland has, at the point where it passes pipe A 10,
holes drilled through forming an entrance to pipe A 10. A jam or packing nut is
also provided to be used if desired. The cistern at the top (A 9) being filled with
air or steam acts as an expander and condensor and modifies the flow of the oil
through pipo A 10 into pipe A 11. The oil passes through pipo A 11 to injecting
valve B 2 which opens when condensation has taken place in pipes A 10 and A 11
and cistern A 9. The spindle B 1 has at the top a valve B 3 which is forced up
by the steam relieved by the opening of injecting valve B 2, and thus gives the
oil time to pass through valve B 2 into the machinery for the purpose of lubricating.
At valve B 3 thore is an air pipe leading to the exterior of the lubricator at B 4
which, by means of a small handcrano regulates the action of valve B 3.
The steam pressure passes from the main pipe A 13 through pipe C 1 and
adjusting cock or valvo D 3 which may be formed a barrel plug or pointed at tho
extremity as shown in the plan into bent pipe C 2 which leads it up to the top
of cistern A 4, then down below the partition between A 4 and C 4 and up
through injector C 3 into air cistern C 4. The partition between C4 and A 4 can
if desired be carried down to the bottom of the lubricator below cock or valve D 3,
and a communication between the cisterns A 4 and C can be formed by turning
cock or valve D 3. The pressure of the air in C 4 combined with the pressure of
the steam injected from bottom at C 3 and from top at C 5 is equal to the
pressure exerted to drive the oil in A 4 into pipe A 5, and so on as (described)
described above. Within injector C 3 is a ball which works so as to stop the rush
of condensed water into pipe C 2. If desired cock C 3 and partition between A 4
and C 4 may be entirely dispensed with, provided the condensation is sufficient for
the necessary feed of oil to the machinery.
For the purpose of lubricating bearings whether steam is or is not required the
air in cistern Ċ & is compressed by means of additional air being introduced and

page_text: forced by an injector at pipe D 2, and passed through crane or valve D 3 into
cistern C 4, but this is rendered unnecessary by leaving the lubricator open at the
top so as to admit the air freely.
An easily evaporating liquid such as liquid ammonia, benzole. bisulphid of
carbon & may be injected at D 2 in the same manner as the air immediately
above described, so as to produce evaporation in C 4 in proportion as the pressure
of air and the lubricating oil decrease.
Where continued lubrication is desired without filling the lubricator by cock or
valve A 1, a connection can be made through pipe E Ĭ for conveying oil through
the lubricator from a vessel placed at a higher level.
The lubricator may be used without having spindle B 1 and valves B 2 and
B 3 by inserting a plug (A 13 in Fig. 1) or by inserting a tumbler (A 18 in Fig. 2)
both with holes at sides to prevent steam from entering pipe A 11. Should it be
deemed expedient to dispense with spindle B1 and valves B 2 and B 3, the
pipe C 2 may be used either as shewn on Fig. 1 or as a straight centre pipe (C 2
in Fig. 2) in the latter case occupying the position held by the spindle and valves.
At the top of pipe C 2 are two tumblers, C 3 and C 4, placed (as shewn in plan)
so that the steam which passed up pipe C 2 -prevents by condensation (the gravity
of water being greater than that of oil) the oil from passing into C 2, and forces
it through cisterns A. 2 and A 4 into pipe A 5 and so on as described. Either of
the tumblers or valves inarked Fig. 5, Fig. 6, and Fig. 7 on plan may be used
instead of tumblers C 3 and C 4. The filler and cock at the top of the lubricator
may be formed either as in Fig. 1 (A 3 Z) or as in Fig. 2 (A 3 Y), and should the
use of the underfiller A 3 X not be desired the whole work of filling may bo
performed by the filler at top formed in either of the ways indicated. If it is
desired that cock F 1 should be lowered, for the purpose of increasing the injecting
force as after mentioned, pipes C 2 and A 11 may be lengthened as suitable
from A 12 downwards as shewn in Fig. 8. For bearings, a lubricator may be
constructed at a much less cost than, but on the same principle as, the above.
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
1. It will simplify and render more reliable and effective the lubricating of
all descriptions of machinery & for which lubrication is necessary.
2. It may be placed in such a position for lubricating any kind of machinery or
bearings as to cause no inconvenience.
8. As the specific gravity of oil is greater than that of steam, there is created
at A 13 an injecting force which may be increased or decreased by lengthening or
shortening pipe C 2.
4. By means of the packing glands at the top of the sight tube an entirely new
system of packing is adopted.
5. The plug or tumbler A 13 and the tumblers C 3 and 0 4 are entirely new.
6. No outside pipes or condensors as at present in use are required, and the
system of forming one pipe inside another in lubricators is entirely new.
7. It will work more effectively at a much less expenditure of oil than the
present.
"
Dated this Ninth day of March Bishteen hundred and eighty fivo vears.