of Shafting and the Bosses of Loose Pullies or Wheels.
Year: 1887

page_text: of Shafting and the Bosses of Loose Pullies or Wheels.
I, WILHELM SPANNUTH of Kalk near Cologne in the Empire of Germany
do hereby declare the nature of this invention and in what manner the same is to
be performed to be particularly described and ascertained in and by the following
statement:-
According to my invention I form the oil cups usually cast on the covers of
plummer blocks or the bosses of loose pullies or wheels into receptacles or grease
boxes for solid or viscous lubricants, by providing such cups with pistons or caps by
the advance of which the lubricant is forced through one or more channels on to the
bearing surfaces.
Fig. 1 of the accompanying drawing shews one arrangement of my invention as
"Sellers"
applied to an ordinary plummer block, Fig. 2 shews its application to a
bearing.
The oil cup a of the plummer block is bored out cylindrically inside and is provided
with a disc or piston e, carrying a screw b which screws into a threaded hole in the
cap of the plummer block, and is provided with a head c, so that by turning such
screw so as to force the piston downwards, the lubricant is forced down through
channels d d (shewn in dotted lines in Fig. 1) on to the bearing surfaces. These
channels are by preference formed on each side of the centre as shewn, instead of at
the centre, in order to distribute the lubricant more uniformly over the entire bearing
surfaces. The screw may either be made to turn loose in the piston as at Fig. 1, or
it may be fixed thereto, as at Fig. 2, so that the piston rotates with the screw. The
hole into which the screw passes may either be open at the inner end, as shewn, the
close fit of the shaft against it being sufficient to prevent the entrance of the
lubricant at that point, or the inner end of the hole may be closed.
A longi-
tudinal groove may be provided in the screw, as shewn, in order to allow any grease
that may exist in the hole below the screw to escape up into the grease box as the
screw is advanced.
It will be seen that by adopting the above described construction, the lubricating
appliances are greatly simplified. The usual cap or cover of the grease box is

page_text: dispensed with, while the boring out of the cup (which is made of proportions
somewhat different from those of ordinary oil cups), and the fitting of the same with
piston and screw only causes a slight increase of cost of the bearing, such cost being
considerably less than the application of a separate grease box. The piston need not
fit so accurately as has been heretofore considered necessary; it is sufficient if it fits
tolerably tight. This form of grease box is much stronger than separately attached
ones, and it occupies much less space than these.
It will be evident that my invention may be carried out in other ways than
above described by adapting to the cup on the plummer block or pulley boss
any suitable known arrangement for forcing the solid or viscous lubricant on to the
bearing surfaces, such as are used with detachable grease boxes, such as that of
Stauffer, in which a cap containing the lubricant is screwed down over the cup, which
in this case only has one or more passages through which the grease in the cap is
forced, as this is screwed down.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I declare that what I claim is :-
1. Constructing plummer blocks or the bosses of loose pullies or wheels with
grease boxes consisting of a fixed part situated on the pluminer block or boss itself
inseparable therefrom and a moveable part serving to force the lubricant on to the
bearing surfaces, substantially as herein described.
2. In grease boxes such as are referred to in the preceding claim, providing
the cup on the plummer block or boss with a piston having a central screw
screwing into a threaded hole in the plummer block or boss, substantially as herein
described.
3. In grease boxes constructed as set forth in the preceding claim, providing
channels for the lubricant situated laterally to the central screw, substantially as
herein described.
Dated this 9th day of Anril 1887
ABEL & IMRAY,
Agents for the Applicant.