provements in and in connection with Loose Pulleys, Gear Wheels, and like Rotating Parts of Machinery.
Year: 1898

page_text: Date of Application, 11th June, 1898-Accepted, 27th Aug., 1898
COMPLETE SPECIFICATION
Improvements in and in connection with Loose Pulleys, Gear Wheels,
and like Rotating Parts of Machinery.
I, KARL WIDMANN, Engineer, and Manager of the Pottendorf Spinning Mills,
near Vienna, in the Empire of Austria, do hereby declare the nature of this in-
vention and in what manner the same 18 to be performed, to be particularly des-
cribed and ascertained in and by the following statement.-
The lubricating processes hitherto used for the revolving surfaces of loose pulleys
and the like and carried on by means of centrifugal and other lubricators or by
lubricating the hub directly with an oil can have all to a less or greater degree
the defect of insufficiently lubricating the same especially as regards pulleys turn-
ing at a high speed and notwithstanding a great consumption of lubricant, more-
over lubrication was either impossible or highly dangerous while the pulley was
revolving, and the lubricant whether in the form of oil or of solid fat was thrown
on to the adjusting rings or other revolving surfaces, which gave rise in the
majonty of cases to disastrous consequences
The above defects are fully remedied by the hereinafter described automatic
lubrication owing to which the axial displacement of the loose pulley or the like
is at the same time avoided, so that with less attention and a great economy of
oil the largest possible quantity of oil or fat is conveyed on to the revolving
surfaces, and the latter lubricant can no more be thrown off
The accompanying drawings show by way of example one manner of carrying
my invention into practice, Fig 1 being a section of a loose pulley parallel to
the axis while Fig 2 18 a view of the same pulley with the cover removed from the
hub.
Upon the shaft or journal carrying the loose pulley is fixed by means of a set
screw c the shell or box a provided with a boss in the centre and with circular
grooves k, l, at each end The pulley is fixed upon this box a with its nave com-
posed of two parts in such a manner that the inner parts 6 and e of the hollow
nave having the form of an oil chamber extend to the right and to the left hand
side of the boss of the shell or box a
น
The hub of the driving pulley 18 divided
in such a manner that the part d of the same serves as a cover and is fixed by
the screws to the fixed part of the hub of the said driving pulley. The inner
hub 6 of the fixed part of the hub as well as the inner hub of the cover like
part d of the hub are connected by means of ribs h with the casing or outer hub
forming the oil chamber Consequently the boss 2 of the shell or box a is located
between the hub ring 6 of the fixed part and the hub ring e of the loose part d
of the hub and allows, when the lid or cover 18 screwed upon the fixed part of
the hub, no axial displacement of the loose pulley The wall of the hub formed
into an oil chamber and which is placed parallel to the shaft 19 80 arranged that
the inner side of the chamber, which is enlarged from the side walls towards the
middle, forms a groove wherein is located the spoon like oil dripping cup m
inserted in the boss i of the shell or box a This dripping cup m is a hollow body
which communicates through the canals p and q with the lubricating grooves r

page_text: ands of the revolving surfaces, so that the lubricant projected out of the same
BITIves between the revolving surfaces The lubricant 18suing or thrown from the
sides of the inner hub collects in the groove like depressions and of the box a
and diips from the sharp edges of the swelling or projection formed on the bottom
surface of the said grooves or depressions into the shell The part of the hub
formed into an oil chamber has the appearance of a shell the interior part of
which is closed to the outside partly by the packing and partly by the edges
projecting above the ribs h, bent and abutting against the box a
t
The screw
plug fixed into the cover and which may be also secured to the side of the pulley
or to any other suitable part thereof serves to pour the lubricant into the oil
chamber and when this oil chamber 18 filled with oil through the perforation in
the said sciew plug up to the height of the revolving box a, this oil follows,
through adhesion, the repid revolutions of the driving pulley and forms in con-
sequence of the development of centrifugal force an oil ring on the outer periphery
and within the oil chamber which ring is broken up by the dripping cup mi standing
with its oil inlet opening against the direction of rotation of the driving pulley,
while its edge scrapes like a spoon the inner surface of the hub, the oil being
conveyed to the revolving surfaces through the opening on canal in the screw
threaded plug o of the dripping cup and the canals p and q of the box or shell a
after having first passed through the two lubricating grooves and s
In this
manner all parts subjected to friction receive as much oil as they can possibly hold
between them this oil running, after it has lubricated the revolving surfaces,
towards the ends of the inner hub in order to return to the oil chamber and,
while smearing anew the walls of the same, to collect in the groove of such
chamber in order to be again scooped out by the dipping device and finally driven
between the revolving surfaces
When the driving pulleys to be lubricated revolve slowly and the formation of
an oil ring in consequence of the action of centrifugal power is no more possible,
the circulation of the oil in the oil chamber takes place in such a manner that
this oil is conveyed to the revolving surfaces of the shell or box a by means of
the dripping cup rotating therewith and acting as a scoop. The use of this
lubricator or lubricating device and connection may be extended not only to
pulleys but also to gear wheels and in fact to all other revolving parts of machinery
and it is particularly applicable wherever it 18 desired to effect a great economy of
lubricant and in order to avoid frequent repairs and even accidents in machine
shops and elsewhere
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:
1 An automatic lubricator acting also as a connecting means for loose driving
pulleys, gear wheels and other similar rotating parts of machinery, characterized
by the enclosing of the divided hub together with the adjusting ring and its
revolving box securing the pulley from axial displacement, in an oil chamber
closed to the outside and rotating with the pulley, the lubricant introduced in
this oil chamber being conveyed to the revolving surfaces during rotation by a
dripping cup beak or spoon of suitable shape, and being caught up again by the
sard enclosing oil chamber as it runs off from these revolving surfaces for the
purpose of allowing the constant cuculation of the oil or other lubricant contained
in this chamber.
2 An automatic lubricator for loose driving pulleys, gear wheels and other
similar rotating parts of machinery such as above claimed, characterized by the
division of the hub of the pulley forming the oil chamber and by the formation
of an acute angle between the outer cover of the hub and a line running parallel
to the shaft and of a groove or well at the meeting edges of the parts forming
the outer cover wherein the lubricant is collected
3. An automatic lubricator for loose driving pulleys gear wheels, and other

page_text: similar rotating parts of machinery such as above claimed, characterized by the
formation of groove like recesses (k, ) in the ends of the box or shell a which
serve to collect the lubricant dropping out of the revolving surfaces, while a
projection is formed in their bottom surface allowing the lubricant collected in
Buch grooves or recesses to drip into the oil chamber
2
4 An automatic lubricator for loose driving pulleys, gear wheels and other
amilar rotating parts of machinery such as above claimed, characterized by the
arrangement in the boss located between the two inner hubs e and b of the oil
chamber, of one or more oil dripping or catching devices m having the shape of a
scoop or spoon and the oil inlet openings n of which are arranged opposite, v.e,
counterwise to the direction of rotation of the driving pulleys and convey the
lubricant through the canal o of the plug of the oil catching beak or cup as well
as through the canals and 7 of the boss to the lubricating grooves r and s and
hence to the revolving surfaces
Dated this 10th day of June 1898
CRUIKSHANK & FAIRWEATHER,
Chartered Patent Agents,
62, Saint Vincent Street, Glasgowt Agents for the Applicant