IMPROVEMENTS IN OR APPERTAINING TO LUBRICATORS
Year: 1885

page_text: I, WILLIAM PHILLIPS THOMPSON, Fel. Inst. P. A. of the Agency for Foreign Patent
Solicitors, 6 Lord Street, Liverpool in the county of Lancaster, and 323 High
Holborn in the county of Middlesex, Civil Engineer do hereby declare the nature
of the said invention for IMPROVEMENTS IN OR APPERTAINING TO LUBRICATORS
(a communication from abroad by Frank H. Bolte of Milwaukee in the state of
Wisconsin, United States of America, Inventor) and in what manner the same is
to be performed, to be particularly described and ascertained in and by the
following statement :-
This invention relates to improvements in that class of lubricators, which are
adapted to be used in lubricating machinery, with tallow, grease or other heavy
lubricants.
The object of this invention is to provide a device for automatically forcing the
lubricant from the cup, without waste, slowly and uniformly, as required by the
machinery.
The construction of the cup is explained by reference to the accompanying
drawings, in which
Figure 1 is an elevation, a part of the enclosing case being away, showing the
construction of the inner mechanism of the cup.
Figure 2 is a bottom view of the spring enclosing case, and its enclosed
mechanism.
Figure 3 is a top view of the piston.
The receptacle A is of cylindrical form, and is provided with a downwardly
extending neck B having a screw thread cut on its outer surface by and through
which neck the cup is attached to the part of the machine to be lubricated, and
this neck is provided with a vertical aperture C, through which the lubricant
escapes from the cup. The cup is provided with a removable cover D, which is
secured on the cup by a screw thread E, or by other equivalent means. The stem F
passes vertically through the cover D to the bottom of the cup and is provided
below the cover D with a screw thread G, on which a piston H travels up and
down within the cup, the top end of which screw serves also as a collar bearing
against the cover D to hold the stem F down in the cup. The piston H is provided
with one or more grooves I in its periphery, into which a small supply of the
lubricant will intrude and form a convenient and sufficient packing for the piston
against the walls of the receptacle.
To permit the convenient raising of the piston in the cup, the piston is provided
with an air vent J, closed on the under side by the valve K, which valve is a

page_text: small disc supported on a stem L, passing through the piston in an adjacent
aperture and movable vertically therein. A head on the upper end of the
stem L, retains the stem and disc in position. The pressure of the lubricant
upwardly against this disc, keeps the vent J closed while the piston is pressed down
against the lubricant. A helical spring M enclosed in the case N above the cover D
has its inner end affixed to the stem F and its outer end is attached to the case N.
The lower edge of the case N is provided with the annular ratchet O, the teeth of
which are adapted to engage with a catch P rigid on cover D. The case N is held
down upon the cover D by the spiral spring Q, inserted around the stem F, between
the top of the case N and the head (R) of the stem, but which spring yields
sufficiently to allow the ratchet teeth O to pass over the catch P forwardly to
wind up the spring M. The operation of the device is as follows: the cover D
being unscrewed and removed with the stem and piston, from the cup, and the
receptacle being filled with grease, the cover with the stem and piston is replaced
and the cover is screwed on to the cup, the piston being then within the cup on the
top of the lubricant. The helical spring M is then wound up by turning the case N
around (to the left) the ratchet O and catch P holding the case against the recoil of
the spring, which recoil acting upon the stem F, causes it to turn in the same
direction in the piston H and the piston H being held from turning by the friction
of its periphery against the walls of the cup, is forced down on the screw on
stem F against the lubricant, as the stem turns by the unwinding of the helical
spring, whereby the lubricant is forced gradually out through the passage C upon
the part of the machinery to be lubricated. In raising the piston in the cup the
disc valve K drops down and allows air to pass below the piston through the
vent J.
Having now particularly described and ascertained the nature of the said
Invention, and in what manner the same is to be performed, as communicated to
me by my foreign correspondent, I declare that what I claim is
1st. The combination with the receptacle of a lubricator cup of a piston therein,
travelling on a screw cut stem a stem rotated by a helical spring affixed at one end
to said stem and at the other end affixed to an enclosing case or other operating
mechanism for winding and holding the outer end of the spring when wound, sub-
stantially as described.
2nd. The combination with the cup A having discharge passage C, of the
travelling piston H, stem F provided with screw thread on which the piston H
travels, cover D having catch P rigid thereon, spring enclosing case N provided
with ratchet O and helical spring M attached at one end to the stem F and at the
other end to the case N substantially as described.
3rd. In lubricating cups, the cover D having catch P and the case N having
annular ratchet O in combination with stem F, helical spring M, attached to the
case N and to stem F and spiral spring Q inserted between the case N and the
head R of the stem F, substantially as described.
4th. In lubricating cups the piston H in combination with the vent J and disc
valve K, supported on stem L movable in an aperture in piston H and adapted to
close vent J, substantially as described.