IMPROVE- MENTS IN LUBRICATORS
Year: 1885

page_text: I THOMAS WILLIAM MITCHELL, of 105, Round Street, Bradford, in the County
of York, Engineer, do hereby declare the nature of my invention for IMPROVE-
MENTS IN LUBRICATORS to be as follows:-
The object of this invention is to lubricate the crank pin in stationary or
3 locomotive engines, and is accomplished partially by means of the centrifugal force
and by means of an adjustable spring capable of placing more or less pressure
upon a solid piston with rings, or other ordinary means of securing a tight fit in a
cylindrical formed cup terminating in a pipe fixed into the aperture of the
connecting rod communicating with the neck of crank pin.
Dated this 17th day of January 1885
WAUGH & CHAPMAN,
Agents for the Applicant.

page_text: I THOMAS WILLIAM MITCHELL, of 105 Round Street, Bradford in the County of
York, Engineer do hereby declare the nature of my invention for "IMPROVE-
MENTS IN LUBRICATORS" and in what manner the same is to be performed to
be particularly described and ascertained in and by the following statement :-
The object of my invention is to lubricate the crank pin or other working parts
of stationary or locomotive engines in such a manner, that they are continuously
lubricated without constant attention and consists in forming a cylindrical cup
fitted with a cover and piston the rod of which is hollow terminating with a small
hole at the top: the bottom of the cup terminating with a small aperture
communicating with the neck of the crank pin or other part to be lubricated.
In order that my invention may be fully understood I have annexed hereto a
sheet of drawings descriptive of my improved lubricator, Fig. 1. represents an
elevation Fig. 2 is a section of the same and Fig. 3 is also a section through the
lubricator, the cup being forged along with the connecting rod of a stationary or
Jocomotive engine.
The lubricating grease is placed in the cup in the space A, below the piston B,
the space between the flanges of which may be filled with rings or ordinary
packing. The piston rod B₁ passes through the boss of cap C, and is made hollow
with an aperture through the top as shewn in order to allow the air to escape
from the space between the piston and lubricating grease.
In working out my invention I find that the centrifugal force is sufficient to
force out the lubricant, provided that the air between the piston and the lubricant
is allowed egress.
When applied to the crank pin of an engine the lubricant is forced through the
small aperture at the bottom of the cup by the rotary motion of the cup, the
piston gradually lowering in the same. When applied to a stationary journal, the
piston B, is not made to fit the cup so tight as when applied to a crank pin,
the piston being forced down by small circular weights placed on the piston, or by
means of a spring between the piston and cap.
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
The lubrication of crank pin or stationary journals by a cup fitted with a piston
having a hollow rod substantially as shewn and described.