IMPROVEMENTS IN OIL CANS FOR SUPPLYING OIL FOR LUBRICATION
Year: 1880

page_text: PROVISIONAL SPECIFICATION left by Lorenzo Field at the Office of the
Commissioners of Patents on the 4th December 1880.
LORENZO FIELD, of Birmingham, in the County of Warwick, Cabinet Maker.
"IMPROVEMENTS IN OIL CANS FOR SUPPLYING OIL FOR LUBRICATION."
My Invention consists of the construction and combination, herein after described,
of the parts of oil cans for supplying oil for lubrication whereby the quantity of
oil delivered by the oil can may be determined with great nicety and the oil can
readily filled with oil.
In applying my improvements to oil cans having a conical figure I make the
short delivery nozzle at the summit of the conical can fixed, and I make the base
of the can with a hollow foot or rim. In the axis of the can and in the line of the
delivery nozzle I fix a tube. This tube is secured air tight in the oil can, one end
of the tube being soldered to the summit of the conical can and the other end
being soldered to the bottom of the can above the hollow foot or rim. In the said
tube a tight fitting piston works a rod from the piston passing through a screw
cap screwing into and closing the bottom end of the tube, the projecting end of the
rod having a head or knob upon it for working the piston. A coiled spring is
situated between the top of the piston and the delivery nozzle of the can.
This
spring forces the piston to the end of its back stroke when the piston rod is not
pressed upon by the hand. At the upper part of the tube narrow slots or openings
are made in it at opposite sides. By opening or closing these slots communication
between the chamber containing the oil and the upper part of the tube may be
established or cut off. When the piston is forced back these slots are uncovered by
it, and oil from the oil chamber may pass into and fill the portion of the tube above
the piston in communication with the delivery nozzle. By pressing inwards the
piston by acting upon the head of its rod in the hollow foot of the can the oil
above the piston is ejected through the delivery nozzle onto the part to be lubricated,
the slots in the tube being closed by the piston.
By pressing inwards the piston more or less the quantity of oil delivered at the
nozzle may be regulated.
On removing the hand from the head of the piston rod the piston returns to its
normal position in the tube by the action of the spring reopening communication

page_text: between the oil chamber and piston tube, and a fresh supply of oil enters the upper
part of the said tube ready to be ejected therefrom by the forward movement of the
piston.
The oil can is filled with oil at the bottom end of the tube in the said can by
removing the screw cap closing that end together with the piston and rod. By
pouring oil down the tube at its open end the nozzle being closed by the finger,
the oil passes into the oil chamber through the slots in the tube. A vent hole is
made in the bottom of the oil can near the tube. When the screw cap is removed
from the tube this vent hole is uncovered and the filling of the can with oil may be
effected. On replacing the screw cap after filling the oil can the vent hole is
covered by the flange of the said cap.
In applying my Invention to Hat or other shaped oil cans having a long
delivery spout at one end and a handle at the other end, I arrange the tube in
which the piston works in an inclined position in the can, so that its bottom end is
situated opposite the delivery spout and its top end, from which the knob or head
of the piston rod projects, is situated near the handle of the can. In this
arrangement the piston can be worked by the thumb of the hand holding the
oil can.