IMPROVEMENTS IN THE CONSTRUCTION OF LUBRICATING BOSSES FOR LOOSE PULLEYS AND ANALOGOUS PARTS OF MACHINERY
Year: 1882

page_text: LETTERS PATENT to William Robert Lake of the firm of Haseltine Lake
<<
& Co Patent Agents, Southampton Buildings, London, for an invention of
IMPROVEMENTS IN THE CONSTRUCTION OF LUBRICATING BOSSES FOR LOOSE
PULLEYS AND ANALOGOUS PARTS OF MACHINERY," A communication to him
from abroad by Paul Decauville, of Paris, France.
PROVISIONAL SPECIFICATION left by the said William Robert Lake at the
Office of the Commissioners of Patents on the 26th July 1882.
WILLIAM ROBERT LAKE, of the firm of Haseltine, Lake, and Co., Patent Agents
Southampton Buildings, London, " IMPROVEMENTS IN THE CONSTRUCTION OF
LUBRICATING BOSSES FOR LOOSE PULLEYS AND ANALOGOUS PARTS OF MACHINERY,"
[A communication to him from abroad by Paul Decauville, of Paris, France.]
"
This Invention relates to the construction of lubricating bosses for loose pulleys
and other parts turning freely upon a shaft. It consists essentially in forming, in
the central portion of the pulley, an annular reservoir for containing the lubricant
which is supplied to the contact or bearing surface of the pulley by small pieces of
cane or analogous material dipping into the lubricating substance at one end, and
bearing on the surface of the shaft at the other end; the oil in excess returns to
the reservoir by apertures suitably arranged as to number and position.
The great porosity of cane permits of utilizing for conveying the lubricant, two
concomitant actions, that caused by capillarity and the suction caused by a vacuum.
In the case of pulleys rotating at a slow speed, the lubrication is effected by
capillarity, but when they are driven at a high speed, the lubrication is effected by
the oil being drawn up the pieces of cane by means of the vacuum produced at the
surface of the shaft.
In the drawing is represented by way of example, the central part of a loose
pulley provided with my improved devices.
Figures 1 and 2 represent respectively, a vertical central longitudinal section,
and a vertical transverse section thereof.

page_text: As shewn in the drawing the central portion of the loose pulley has an annular
cavity or space a forming a reservoir, in which is introduced the lubricant; four
pieces of cane b (or there may be a greater number) are inserted so as to bear
upon the circumference of the shaft; these pieces are held by screws, two at right
angles to the other two, so as to properly distribute the lubricating material upon
the rubbing surfaces, and are arranged obliquely with regard to the shaft, to
facilitate their insertion, which, without this inclination, would be prevented or
rendered difficult because of the arms or spokes of the pulley. In the grooves d
are made the holes e through which the excess of oil or surplus returns into the
reservoir; these holes are diametrically opposite to each piece of cane so that the
oil is only returned after having passed over the rubbing surfaces.
The lubrication of the pulley is thus ensured at any speed, the capillary action
sufficing for low speeds and the suction caused by a vacuum being added thereto
in the case of high speeds.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said William Robert Lake in the Great Seal Patent Office on the
26th January 1883.
WILLIAM ROBERT LAKE, of the firm of Haseltine, Lake, and Co, Patent Agents,
Southampton Buildings, London, " IMPROVEMENTS IN THE CONSTRUCTION OF
LUBRICATING BOSSES FOR LOOSE PULLEYS AND ANALOGOUS PARTS OF MACHINERY."
A communication to me from abroad by Paul Decauville, of Paris, France.
This invention relates to the construction of lubricating bosses for loose pulleys
and other parts of machinery which are designed to turn freely upon a shaft.
According to the said invention I form, in the central portion or boss of the
pulley, an annular reservoir for containing the lubricant, which is supplied to the
contact or bearing surface of the pulley by small pieces of cane, or analogous
material, dipping into the lubricating substance at one end, and bearing on the
surface of the shaft at the other end; the oil in excess returns to the reservoir by
apertures suitably arranged as to number and position.
The great porosity of the cane enables me to utilize, for conveying the lubricant,
the two concomitant actions of capillarity and of suction caused by a vacuum.
In the case of a pulley rotating at a slow speed, the lubrication is effected by
capillarity, but when the pulley is driven at a high speed, the lubrication is also
effected by the oil being drawn up the pieces of cane by means of the vacuum
produced at the surface of the shaft.
In the accompanying drawing I have represented, by way of example, the central
part or boss of a loose pulley constructed according to the said invention.
Figures 1 and 2 represent, respectively a vertical central longitudinal section,
and a vertical transverse section thereof.
As shewn in the drawing the central portion or boss of the loose pulley has an
annular cavity or space forming a reservoir a, into which the lubricant is intro-
duced; four pieces of cane b (or there may be a greater number, if desired) are
inserted so as to bear upon the circumference of the shaft; these pieces are held
by screws, and are arranged at right angles to one another so as to properly
distribute the lubricating material upon the rubbing surfaces; they are, moreover,
arranged obliquely relatively to the shaft to facilitate their insertion, which,
without this inclination, would be prevented or rendered difficult by reason of the
arms or spokes of the pulley. In the grooves & are made holes e through which
the excess of oil, or surplus, returns into the reservoir a; these holes are diametrically
opposite to each piece of cane so that the oil is only returned after having passed
over the rubbing surfaces.
The lubrication of the pulley is thus ensured at any speed, the capillary action
Bufficing for low speeds and the suction caused by a vacuum being added thereto
in the case of high speeds.
Having thus fully described the said Invention as communicated to me by my
foreign Correspondent, and the manner of performing the same, I wish it understood
that I Claim.
First. A lubricating boss, for a loose pulley or analogous part of machinery,
provided with pieces of cane dipping in au oil-reservoir formed in the boss and
coming in contact with the shaft at different points of the interior surface of the
said boss in such a manner that the lubrication of the rubbing surfaces is effected
by capillarity or by suction produced by a vacuum, or by both of these actions, as
above set forth.

page_text: Second. The combination of the annular reservoir a formed in the boss of a
loose pulley or analogous part of. machinery, the pieces of cane 6 placed obliquely
relatively, to the shaft; and passing through the internal wall of the reservoir, and
the grooves d communicating by the apertures e with the said reservoir to
return thereto any excess of lubricating material, all substantially as, and for the
purpose, specified.
In witness whereof I the said William Robert Lake, have hereunto set my
hand and seal this Twenty sixth day of January in the year of our.
Lord One thousand eight hundred and-eighty three.