Improvements in Lubricators for Bearings Applicable for Solid or Viscid Lubricants.
Year: 1888

page_text: Date of Application, 14th Nov., 1888
Complete Specification Left, 14th Aug., 1889-Accepted, 14th Sept.,
1889
PROVISIONAL SPECIFICATION.
Improvements in Lubricators for Bearings Applicable for Solid or
Viscid Lubricants.
I, JOHN SANDNER BRANDSTAETTER of 21 Yew-tree Road Walton in the County
of Lancaster, Milling Engineer do hereby declare the nature of this invention to be
as follows:-
:-
In solid grease lubricators as ordinarily constructed, there are several very serious
difficulties. First.-The cap has to be withdrawn in order to fill in the grease. In
screwing it on again the thread is very apt to get stripped. Secondly. It is very
difficult in the ordinary cap to prevent the thread being turned somewhat conical
consequently if it be tight when it is first put on it is too tight when it gets near the
bottom and sticks, while if it be true near the bottom it is too slack at the top and
consequently is much more liable to get stripped. Furthermore if pieces of dirt get
in with the grease which frequently happens, the orifice leading to the bearing is apt
to get stopped.
Now I overcome these difficulties in the following manner.-In place of having the
cup chased from top to bottom I prefer to have a raised thread of only a few turns at
the top. I then form a cap of two parts, a lid and a cylinder. The cylinder has a
thread formed on it throughout to fit the thread on the cup. It is then screwed on to
the cup and when the lower part has just passed the thread on the cup one or more
set-screws is passed through holes in it so as to project beyond the thread and
thus prevent the lid from ever being entirely drawn off. Where, however, the
cylinder is cast a projecting rim can be cast on it so as to project below the
thread and the cylinder can be screwed on to the cup from below. The lid of
the cylinder can be fixed on in divers ways but I prefer the rim to project over
the cylinder aforesaid and to be fixed thereto by means of a bayonet joint, pins
on the cylinder working into slots on the lid. I also put an indiarubber washer
between the lid and the cylinder in order to prevent grease from coming out and
to give elasticity to the bayonet joint so that if the end of the groove of the
bayonet joint be a little depressed to prevent the pin returning the indiarubber
shall still keep it tight.
In order to prevent the dirt from getting into the orifice I place a perforated
tube on the orifice projecting upwards nearly to the top of the cup proper and
stopped up at the top, the grease has thus the opportunity of entering all the
perforations making it very difficult for dirt to stop it.
Another advantage of this cup over any other known to me is this.-The cup
is always left full of grease so that even when the cap formed of the lid and
cylinder has been screwed down till the lid rests on the cup there is still a large
body of grease in the cup and thus if the bearing heated through lack of grease,
the grease would melt and descend into the bearing."
Dated this 12th No
hon 1888
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Patent Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Lubricators for Bearings Applicable for Solid or
Viscid Lubricants.
I, JOHN SANDNER BRANDSTAETTER of 21 Yew-tree Road, Walton in the County
of Lancaster, Milling 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 :-
In
In solid grease lubricators as ordinarily constructed, there are several very serious
difficulties. First. The cap has to be withdrawn in order to fill in the grease.
screwing it on again the thread is very apt to get stripped. Secondly. It is very
difficult in the ordinary cap to prevent the thread being turned somewhat conical,
consequently if it be tight when it is first put on, it is too tight when it gets
near the botton and sticks, while if it be true near the bottom, it is too slack at the
top and consequently is much more liable to get stripped. Furthermore if pieces of
dirt get in with the grease, which frequently happens, the orifice leading to the
bearing is apt to get stopped.
Now I overcome these difficulties in the following manner :-
Referring to the drawings
Figure 1 is a vertical section through Figure 2.
Figure 2 is a side elevation of a lubricator constructed in accordance with my
invention.
In place of having the cup A chased from top to bottom, I prefer to have a raised
thread a of only a few turns at or near the top. I then form a cap of two parts, a
lid B and a cylinder C. The cylinder has a thread c formed in it throughout to
fit the thread a on the cup A. It may thus be screwed on to the cup A, and when
the lower part has just passed the thread on the cup, one or more set screws c² are
passed through holes in its sides so as to project beyond the thread c and thus
prevent the lid B from ever being entirely drawn off by accident: Where, however, 2
the cylinder C is cast, a projecting rim can be cast on it so as to project below the
thread and the cylinder can be screwed on to the cup from below. The lid B of the
cylinder C can be fixed on in divers ways, as shown in the drawing, I prefer
the rim to project over the cylinder C, and to be fixed thereto by means of a
bayonet joint, pins c² on the cylinder working into slots on the lid B. I also put 3
an india-rubber washer D between the lid B and the cylinder C in order to prevent
grease from coming out, and to give elasticity to the bayonet joint, so that if the end
of the groove b¹ of the bayonet joint be a little depressed, as shown at d, to prevent
the pin returning, the india-rubber shall still keep a tight joint.
In order to prevent the dirt from getting into the exit orifice e of the lubricator, 3
I place a perforated tube E around the orifice projecting upwards nearly to the top of
the cup proper and stopped up at the top, the grease has thus the opportunity of
entering all the perforations, making it very difficult for dirt to stop it.
Another advantage of this cup over any other known to me is this. The cup A is
always left full of grease, so that even when the cap formed of the lid B and cylinder C40
has been screwed down till the lid B rests on the cup A, there is still a large body of
grease in the cup and thus if the bearing heated through lack of grease, the grease
would melt and descend into the bearing.
I do not limit myself to the precise details of construction herein before described,
as they may be varied without departing from the scope of my invention. For 4
instance the lid B may be placed inside the cylinder C if preferred, or fastened
thereto by screwing or otherwise.
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 I
claim is:-
1. In a lubricator the combination with a reservoir cup A of a screw cylinder C
50

page_text: permanently mounted thereon in such manner that it is capable of a limited up and
down movement to regulate the flow of lubricant, and a lid B closing the outer end of
said cylinder and removably attached thereto by a bayonet joint or an equivalent
readily detachable device, substantially as described and shown.
2. The herein described improvements in lubricators, whereby complete removal of
the cap is prevented, and uneven wearing of the screwed portions is obviated, while
any impurities in the lubricant are prevented from passing away therewith to the
parts to be lubricated, substantially as described.
Dated this 13th day of August 1889.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Patent Agents for the Applicant.