Year: 1896

page_text: Date of Application, 8th Sept., 1896-Accepted, 17th Oct., 1895
Similar reference letters denote corresponding parts in all the views.
A, represents the metal bung lining which is made a little tapering as shown and
provided with an external thread a for turning into a bung-hole, and with an
external annular flange at its top.
The interior of said lining A is bowl shaped as shown at a¹ and the opening at
its bottom is so rounded as to make it slightly larger in diameter at its extreme
lower edge as seen at a³.
This form for the bottom opening of the lining is a very important feature of my
invention as will be hereinafter explained.
Slightly below the top of the bung lining A is provided an internal flange a³ in
which are formed the slots at, and the under surface of said flange is spirally
inclined on opposite sides between said slots as seen in Figure 3. The bung B is
formed cylindrical having an annular flange b at its top which sinks down into the
space between the top of the lining A and its internal flange as for keeping dirt
and dust from entering the slots a of said flange, and at the proper point below the
flange 6 of the bung are formed on opposite sides the projections b₁ which drop
through said slots a' and engage the lower spirally inclined surfaces of the flange a³
when the bung is rotated, by reason of the rubber gasket C secured by the screw c
to the bottom of the bung, which gasket is bowl shaped and bears hard against the
interior bowl portion of the lining as seen in Figure 1, and by reason of the peculiar
rounded surface of the bottom opening in said lining the edge of the gasket has a
tendency to spread by the internal pressure of the gas from any effervescing liquid
in the barrel, which greatly increases the sealing efficiency of the bung.
The gasket has at its top a circular projection which fits into the groove b*
formed in the bottom of the bung B, and thus the gasket is kept in a position
concentric with said bung.

page_text: The bung is provided with a socket in its top in which to fit a wrench or key
for turning the same as seen at 6 Figures 1, 4, and 5.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is ;-
1. A bung hole lining having at its top an external flange and slightly below its
top an internally projecting flange the under surface of which is spirally inclined
on opposite sides, and slots formed in the thinnest portion of said flange, said lining
being provided with a bowl shaped bottom opening, and a bung provided with
projections for engaging the under side of said internal flange and adapted to seat
itself in and close the bottom. opening of said lining and an annular flange at its
top to exclude dirt.
2. A bung hole lining provided with an internally projecting flange located near
its top, the under surface of said flange being spirally inclined on opposite sides,
slots arranged diametrically opposite through the thinnest portion of said flange,
the interior of said lining being bowl shaped and provided with a bottom opening
having its edge rounded, and a bung provided with projections. for engaging the
under side of said flange, and a bowl shaped rubber gasket secured to the bottom
of said bung, all substantially for the purpose set forth.
3.. A bung lining being internally bowl shaped and externally threaded and
provided with an external flange at its top, an internally projecting flange near its
top provided with slots at opposite sides, the under surface of said flange being
spirally inclined between said slots, a bung having an annular flange at its top and
projections on opposite sides and below said flange adapted to enter the slots and
engage the under side of the internal flange of said lining, and a rubber plug
secured to the bottom of said bung, fitting, the bowl, shaped, interior of said
lining.
Deted this 8th day of September 1896-
ALLISON BROS.,
Agents for the Applicant.