An Improved Lubricating Cup.
Year: 1892

page_text: Date of Application, 13th Sept., 1892-Accepted, 5th Nov., 1892
COMPLETE SPECIFICATION.
An Improved Lubricating Cup.
We IRA. I. BRIGGS Railroad Conductor, and ALDEN WINSLOW SANBORN,
Carriage Manufacturer, both of No. 24 Beales Street, in the City and County
of San Francisco, State of California, United States of America, 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:
Our invention relates to an improved lubricating cup which is especially adapted
for use upon gas engines, crank pins, and in other places where there is an
intermittent pressure, either of gas or vapor, or by reason of centrifugal rotary
motion against which the oil or lubricating material is to be introduced.
It consists in certain details of construction which will be more fully explained
by reference to the accompanying drawings, in which :-
Figure 1 represents a vertical section taken through the cup passages, showing
the valve and interior parts.
Figure 2 is a view showing the application to a cup to be used upon a
crank pin.
Figure 3 is a modification showing a cup having two independent valves.
A is a lubricating cup of any desired construction having through the bottom a
passage forming a chamber B which has a valve seat C in the bottom.
The upper part of this chamber B is screw-threaded to allow the plug D to be
screwed into it.
This plug has a hole made through it, and in the lower end has a valve seat D¹
opposing the seat C which is made in the bottom of the chamber.
E is a valve stem having the valves F and G upon its opposite ends. These
valves are adapted to close against the seats C and D' which are sufficiently fur
apart so that when one valve is closed the other will be open.
Triangular extensions or wings H extending beyond the valves at either end,
enter the passages above and below the valves, and serve as guides to insure the
valves moving in line and accurately closing.
Below the chamber B extends a tubular shank, screw-threaded upon the outside
and adapted to fit into the cylinder or other part to be lubricated and retain
the cup in place. The screw plug D having fine threads upon the outside may be
moved up or down so as to increase or decrease the distance between the valve
seats C and D and the distance which the valves move is thus correspondingly
increased or diminished. This enables us to make a minute adjustment of the
valves, and thus regulate the supply of oil as accurately as may be desired.
By this construction it is also easy to remove the valve at any time by simply
taking out the plug without disturbing the oil cup at all.
The manufacture is also much simplified as the whole cup can be bored
out from above, and the valve chamber and lower valve seat formed at the
same time.
When the lubricator is used upon a gas engine where the pressure is considerable
at one instant, and where they may be a vacuum at the next, the valves are made
light with a slender shank between them.
is
When there is no pressure, or there is a vacuum from below, the valve drops,
and the lower passage is closed, while the upper one, through the plug D,
opened, thus allowing oil within the cup to flow down into the space around the
valve stem. As soon as the
pressure
from below strikes the lower valve, it forces
it up and closes the upper valve, and communication with the interior of the oil
cup. This allows the oil which is contained in the chamber B around the valve
ID 21

page_text: stem to flow down through the passage of the lower valve and thus pass to the
point to be lubricated.
When the valve is to be used upon crank pins, or machinery having a con-
siderable centrifugal motion,. we prefer to make the valves at opposite ends of
a cylindrical plug without turning it down to form a slender shank between the
valve ends. This gives it considerable weight so that when the crank moves
downwardly the centrifugal force lifts the lower valve and allows oil to escape
through the passage below its valve seat.
As soon as the crank commences its upward movement, the weight of the valve
is sufficient to close the opening, while the upper opening is exposed by the
dropping of the valves, and oil can flow into the chamber around the valve and
be in readiness to pass through the lower passage as soon as that valve is again
opened.
The exact amount of oil necessary for lubricating the parts is thus easily
regulated by means of the screw plug which forms the upper seat, and the valve
can be removed as previously described without removing the cup.
The cups are provided with covers H¹ to keep out dust and to prevent the oil
being thrown out when used as crank pin oilers.
A perforated convex disk I is placed in the bottom of the cup and arches above
the upper end of the plug D, thus arresting any dirt that may be contained in
the oil.
In Figure 3 we have shown an arrangement in which the cup A has a tube a
extending upwardly from the bottom a short distance.
Below the bottom of the cup is a chamber b, and upon the lower end of this
is screwed a second chamber c. A narrow passage d connects these two
chambers.
In the upper chamber is a valve e which closes upwardly against a corresponding
seat at the lower end of the tubular passage a.
In the lower chamber is a valve stem E with the valves F and G formed
upon it and upon its opposite ends in the same manner as previously described,
these valves closing against the corresponding seats D' and C.
Surrounding the stem E is a spring f, the lower end of which presses upon the
top of the valve F to insure its closing against the lower seat promptly.
The upper end of the spring which, in the present case, is shown as a spiral one,
extends outside of the upper valve G and presses against the upper part of the
chamber e which forms a point of support for the upper end of the spring to enable
it to act upon the lower valve.
The upper valve e is supported near its seat and allowed to drop sufficiently so
that oil can flow from the cup A through the passage a around the valve stem
and into the chamber b. This occurs when the pressure from below is sufficient
to close the valve G against the upper seat in the chamber c and as the chamber b
and the valve e are thus relieved from pressure from below, the valve e will drop
and allow oil to flow from the cup a into the chamber b.
Whenever the pressure from below is relieved, the spring facts to close the
valve F upon the lower seat in the chamber c, and the valve G is correspondingly
drawn away from the upper seat, thus leaving a passage between the two
chambers bc through which the oil may flow freely into the lower chamber c.
C
Whenever the valve F is again raised by pressure from below and the upper
valve G correspondingly closed, the pressure in the chamber c and in the passages
below being equalized, the lubricant is allowed to flow through the passage below.
the valve F and thence to the point where it is to be used.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is
A lubricating cup having a central chamber extending below the bottom, a
valve seat formed in the bottom of the chamber and a discharge passage below

page_text: the valve seat, a valve the lower end of which fits the seat in the bottom of the
chamber, a screw plug adjustably fitted to the upper part of the chamber having
a central hole through it, and a seat in the lower end into which the upper
end of the valve fits, and a convex perforated screen fitting the bottom of
the cup and arching above the screw plug, substantially as herein described.
Dated this Thirteenth day of September 1892.
1. เ
W. E. GEDGE,
Agent.