IMPROVEMENTS IN LUBRICATORS
Year: 1858

page_text: application for Letters Patent was not given within the time prescribed
by the Act.)
PROVISIONAL SPECIFICATION left, by Robert Anderson and John James
Prescott at the Office of the Commissioners of Patents, with their
Petition, on the 16th February 1858.
We, ROBERT ANDERSON and JOHN JAMES PRESCOTT, of Duke Street, Liver-
pool, Brassfounders, &c., do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN LUBRICATORS," to be as follows:-
Our improvements consist, in the first place, in casting the lubricating box
or cup in one piece with the cap of the pedestal or plummer block, with a
shoulder, as shewn; and within the box or cup we fit, in manner hereafter
described, a bearing plate or bridge piece filling the interior thereof containing
small openings, or having fitted thereon or thereto fine wire gauze or its
equivalent for the purpose of straining or filtering the oil or lubricating fluid
or liquid matter in its passage to the bearing; the cap being afterwards
secured to the face plate of a turning lathe, the shoulder is bored taper to
suit the form of plug or valve piece to be fitted; at the same time are bored
the valve seat and oil hole. Through the centre of the brass cap piece, which
will be seen rests in the taper opening, passes a screwed spindle, having a
conical plug or valve at the bottom end thereof, which fits into the corre-
sponding conical portion of the oil hole. The upper end of the rod has a
milled nut thereupon, which upon removing the cover of the oil cup it will

page_text: be seen that the necessary amount of oil required for lubrication can be
supplied by merely turning the nut with the fingers, thereby opening the
valve in all oil cups or lubricating chambers however constructed.
The next portion of our improvement consist in inserting a fine wire gauze
or other perforated diaphragm over the brass valve piece, whereby the oil
is effectually filtered and any dust prevented from checking the valvular
aperture or grinding the bearings.
Another portion of our said improvements consists in self-acting lubricators
which are constructed and worked in the following manner, and as seen in
Figs. 3, 4, and 5, in the accompanying Drawing, which represents a thin
metal oil cup as secured to the cap of a plummer block, but not cast there-
with, and worked from the shaft by the rotation of a friction wheel running
thereupon, having a cycloidal piece attached to one side thereof. This
friction wheel works in and is supported by a forked arm working loose on
a pin upon a long lever, which lever is in connection with a cross shaft,
passing through one side of the oil cup and having its bearings therein upon
the opposite end of the cross shaft; and within the oil cup is secured a short
arm, having a pawl working loose thereupon, the pawl is in connection with
a ratchet crown wheel, fixed a hollow vertical spindle formed at the lower
end; the conical end of this spindle fitting into the corresponding conical
opening formed at the top of a small brass tube passing through the cap of
plummer block.
Upon reference to Figs. 1, 2, 3, in the Drawing it will be seen that Fig. 1
exhibits a view of a plummer block cap and oil cup cast therewith. Fig. 2 is
cross section of same. a is the oil cup, which is bored to a larger diameter
to about half its depth, the lower part 6 being formed taper to allow of a brass
or other valve piece c being inserted through the centre of this valve piece,
passes a screwed spindle & with a conical valve e formed upon the lower end
thereof; this valve e fits into a corresponding conical opening f, formed at
the extremity of the oil hole g. h is a milled head or nut upon the top of
a spindle, which upon the cover i of the oil being removed, the spindle can
be turned by the fingers, thereby opening the valve e and admitting the oil
to the bearings.
Fig. 3 is a plan of the wire gauze diaphragm which is placed upon the
brass valve piece c. Fig. 4 is a sectional view of an oil cup upon the same
principle but not cast with the plummer block cap, and is of the same
diameter throughout its depth; the same letters of reference referring to similar
parts. Fig. 5 is the wire gauze diaphragm for such oil cup. Fig. 6, 7, & 8,
in the Drawing refer to self-acting lubricators, Fig 6 being a section through

page_text: oil cup and plummer block cap; Fig. 7, a front view of same with oil cup in
section; and Fig. 8, a sectional plan of oil cup only. It will be seen that
when the shaft a revolves it will cause the friction wheel b to turn in the
direction of the arrow, at the same time carrying round with it the cycloidal
piece c, which is shewn as pressing against the end of the long arm d; but
upon the friction wheel b moving further round, the long arm d is released
and comes into contact with the smallest diameter of the cycloidal piece.
This movement of the long arm d, which is fast upon the cross shaft f, brings
the pawl g, by means of the short arm h, into gear with the next tooth or
portion of the ratchet crown wheel i, which is fast upon the hollow valve
spindle j, then upon the friction wheel b, moving still further round the
cycloidal piece c, will press upon the long arm & until it comes into the
position shewn in the Drawing; during which time the passage in the
conical end of the hollow spindle j will become charged with oil from the
cup 1, and in its revolution will discharge its contents through the brass
tube m, passing through the cap of plummer block n. o is a fine wire
diaphragm placed over the frame or supporting piece p for filtering the oil.