SIGHT-FEED LUBRICATORS
Year: 1887

page_text: I ANDREW THOMSON of No. 7 Broom Terrace Rotherham in the County of York
Brassfounder do hereby declare the nature of this invention for SIGHT-FEED
LUBRICATORS to be as follows:-
My present invention relates to those kind of Lubricators known as Sight-Feed
Lubricators and consists in forming the said Lubricator so that the Oil or other
Lubricant will flow or feed upwards through water in the sight-glass, without it being
necessary to employ a seperate Condenser; in order to attain this I construct the
Lubricator somewhat after the manner illustrated in the accompanying drawings of
which the following is a description.
Fig. 1. is a sectional elevation and Fig. 2. is a side clevation of one form of my
improved Lubricator. A Cylinder A contains the lubricant which is filled therein
through the top portion A', the Valve or screw plug B being removed for the purpose.
In a suitable position below or on the lower portion of the Cylinder A is arranged a
Valve which is for admitting steam to the cylinder A. The lower end D of
Lubricator is threaded or otherwise formed to fit or screw into steam pipe or steam
cylinder.
辱
When the Valve C is open steam ascends a tube E, at the top of which is arranged
a ball-valve F which is encased in a cage G. After the steam has passed through said
Valve F it blows out of perforations G¹ formed round the cage G, and descends a
portion B formed on the plug B, the steam enters the cylinder A at the bottom of
said portion and becomes condensed; the lubricant then floats thereon and descends
a tube which is preferably arranged as shown; the lubricant then falls into the
conical passage I and is forced through the nozzle J, the quantity being regulated by
means of the Valve or stop cock L.
The lubricant after passing through said nozzle J floats up drop by drop through
water placed in the sight-glass K, it then passes through a hole M and falls down a
tube M which communicates with the portion D and from thence to the steam cylinder
as will be well understood.
My hereinbefore described improved Lubricator has by preference a blow off cock
or Valve N used for removing condensed steam from the cylinder A.

page_text: I, ANDREW THOMSON of No. 7, Broom Terrace, Rotherham in the County of York,
Brassfounder 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 :
My present invention relates to lubricators known as sight-feed lubricators and the
object of my invention is to construct a sight-feed lubricator so that the oil or other
lubricant will flow or feed upwards drop by drop through water contained in a
transparent tube without it being necessary to employ a seperate condenser In order
to attain this I construct my improved lubricator in the manner illustrated in the
Drawings left with my provisional specification and of which the following is a
complete description.
Fig. 1. is a sectional elevation and fig. 2. a transverse elevation of my improved
sight-feed lubricator. The same letters designate.similar parts in each fig.
The improved lubricator is made with a cylinder or oil cup A composed of gun-
metal brass or other suitable substance, this cup A contains the store of oil or other
lubricant which is placed or poured therein through the top part A¹ of said cup A,
the part A being preferably made in cupped form as shown. In order to place or
pour the lubricant into the cup or cylinder A it is necessary to remove the screw-
plug or valve B which has a suitable hand wheel either made with or attached to it.
At the lower part of the cylinder or cup A is arranged a valve C which is used for
the purpose of admitting or cutting off steam from the cylinder or cup A.
The lower end or portion D of my improved lubricator is threaded or formed in
any suitable way to fit or screw on or into the steam pipe, steam cylinder, steam chest
or wheresoever it may be required to use or fix the same.
When the valve C is open
steam passes from the portion D, and ascends the tube E which is screwed into or
otherwise fixed to the bottom of the inside of the cylinder A and is secured in position
shown at fig. 1. At the top portion of the said tube E is a ball valve F which is
encased in a cage G which has any suitable number of lateral or other perforations G'.
.The hollow portion of the plug B which surrounds the said cage G may where
preferred be somewhat enlarged.
After the steam passes the ball-valve-F-it-blows through the perforations G¹ and
descends a belled portion or hollow tube B¹ which surrounds a portion of the tube E
and is either made with as shown at fig. 1. or attached to the plug or valve B, the
steam, then enters the cup or cylinder A at the bottom of the tube or. bell B¹ and
gradually condenses and sinks through the lubricant to the bottom of the cylinder or
cup A and the oil or other lubricant simultaneously floates upon the water so formed
and rises to the top of the inside of cylinder or cup A and overflows down the tube H
which is preferably fitted secured and arranged in the manner shown at fig. 1.
The lubricant then gravitates or falls into the conical passage I and is forced as will
be well understood through the nozzle J and rises in the form of globules into the

page_text: sight or transparent tube K which is composed of glass or other transparent substance.
The globules of lubricant arise through the nozzle J intermittingly and their rapidity
is regulated by means of the valve or stop cock L. After the globules of lubricant
pass up within the sight glass K they pass through a hole M and then descend a
tube M which communicates with the portion D and from thence to the steam pipe
steam chest steam cylinder or other similar machinery required to be lubricated.
My improved lubricator has by preference a blow off cock or valve N shown at
fig. 2, which is for the purpose of letting out or ejecting water from the cylinder or
cup A when tho same has become too accumulative as will be well understood.
In charging my hereinbefore described lubricator and putting it into working
order, it is necessary after attaching or connecting the portion. D to the steam pipe,
steam chest, steam cylinder or other similar machinery to close the valves C, L and N
and to fill the sight tube K with clean water which is accomplished by removing the
plug or cover arranged at the top part thereof as shown.
After closing the said valves and filling the tube K as described the plug or
valve B is removed and the cup or cylinder A is filled with lubricant then the plug B
is again screwed into top of cup A, and the valve C is opened to allow steam to ascend
the pipe E, after a few seconds time the valve L is opened and regulated to give the
required feed of lubricant.
When the cup or cylinder A becomes full of condensed steam the whole of the
lubricant will have been displaced from said cup A this will be clearly indicated when
no more lubricant arises through the nozzle J when this takes place it is necessary
to recharge the cup A in the manner hereinbeforo described, but it is necessary
previously however to open the valve N and so allow the condensed steam to flow from
the cup A, so as to leave room to again charge the lubricator with oil or other
lubricant.
Having now particularly described and ascertained the nature of my said Inven-
tion, and in what manner the same is to be performed, 1 declare that what I
claim is:
1. A sight-feed Lubricator constructed and arranged substantially as herein
described and illustrated at Figs. 1 and 2, of the drawings left with my provisional
specification.
2. The combination substantially as arranged and for the purpose specified or any
mere modification thereof.