MENTS IN APPARATUS OR APPLIANCES FOR LUBRICATING BEARINGS
Year: 1881

page_text: PROVISIONAL SPECIFICATION left by Hans Reisert at the Office of the
Commissioners of Patents on the 16th August 1881.
HANS REISERT, of Cologne, in the Kingdom of Prussia, Germany.
MENTS IN APPARATUS OR APPLIANCES FOR LUBRICATING BEARINGS."
"IMPROVE-
My Invention has reference to improved apparatus for applying semiliquid or
viscous lubricants to bearings.
According to one arrangement, a cylinder, by preference of glass, is open at both
ends, and is fitted with a piston. This cylinder is placed with its one end on a
packing ring of caoutchouc or other material in a disc having a central perforated
stem or feed tube that is secured by screwing or otherwise to the bearing to be
lubricated. This disc has a stirrup or bridge piece formed or fixed thereon which
passes over the top of the cylinder, and has a screw spindle passing through it.
Between the top of the cylinder and the bridge piéce is placed a loose spring
cover, having a central boss through which the screw spindle is screwed so as to
press upon the piston in the cylinder and force the lubricating material through
the perforated stem below on to the bearing. The cylinder is held down securely
on the packing of the base, either by forming the screw thread in the spring cover,
so that the screw spindle must first be turned somewhat, thereby forcing down the
spring cover on to the cylinder before the screw spindle can enter the thread of the
latter, or a helical spring is introduced between the top of the cylinder and
the bridge piece, which spring is raised by a collar on the end of the screw spindle
when this is withdrawn for the removal of the cylinder, such removal being
effected in order to fill the cylinder with fresh lubricating material. The piston
being at the lower end of the cylinder when the lubricant has all been forced out,
the upper end of the cylinder is filled with the lubricant, and it is then placed in
an inverted position on the disc so that the piston is then situated at the top
again.
According to another modification the screw spindle is dispensed with, and the
bottom disc is connected to a loose cover on the upper end of the cylinder by two
lateral bow shaped springs, so formed as to press the cover down on the cylinder,
while when lateral pressure is applied to the springs by the band the cover is
raised from the cylinder so as to leave the latter free to be removed. The piston,
[Price 2d1

page_text: which fits the cylinder easily and is prevented from falling out by flanges at the
ends of the cylinder, is by preference formed of two discs of felt, separated by a
disc of wood of smaller diameter to which the felt discs are secured, and pressure
is put upon the piston for forcing out the lubricant by means of a cylindrical
weight (by preference, of hollow metal loaded with shot) passing freely through a
hole in the cover.
According to another construction the glass cylinder is permanently fixed to the
bottom disc and top cover, and has passing through the latter and through the
piston (which in this case is loaded with lead discs) a small cylindrical tube,
the lower end of which is formed with a coned surface fitting a conical seat in the
top of the tubular supply passage at bottom. The tube has near its upper end a
narrow collar formed with a screw thread, by which it can be screwed into the
cover so as to be raised with its lower end somewhat from the conical seat in the
base, while when the collar is screwed right through the cover the tube rests with
its coned end on the seat and can be moved up and down slightly in the cylinder,
the lower end being made to move between guiding ribs. Within the tube is a
moveable plunger. For charging the cylinder with the lubricant, the plunger is
withdrawn, and the tube being in the raised position the nozzle of a syringe
charged with the lubricant is introduced into its upper end so as to force the
lubricant into the lower end of the cylinder. The piston being thus raised by the
introduction of the lubricant, it will after removal of the syringe and the intro-
duction of the plunger force the lubricant by its weight slowly down the feed
passage in the stem. Should, through clogging of the passage, the weight of the
piston not be sufficient to force the lubricant down, the passage may be freed by
first screwing in the tube as before described, and then working the plunger up
and down a few times by hand, whereby it will be made to act as a force pump,
alternately drawing some of the lubricant into the tube and forcing it down the
feed passage. The tube is then replaced in its former position, allowing the piston
to act as described.
According to another modification the piston is fixed to or formed in one with
the feed tube that is fixed on the bearing, and the cylinder is open at bottom and
can slide up and down over the piston, being closed at top by a cover sliding with
a central hole over an upward extension of the feed tubo, which has lateral holes
communicating with space in the cylinder above the piston. The cylinder is
charged with lubricant by a syringe, the nozzle of which is inserted in the upper
end of the feed tube after which the latter is closed at top by a plug, whereupon
the weight of the cylinder with its cover will force the lubricant down the tube to
the bearing.