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Патент USA US2407023

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Sept. 3, 1946.
H. A. LOCKWOOD_
ANTICORROSIION PLUG
2,407,023
Fiied June 25, 1942
lNVEN-TOR
Patented Sept. 3, 1946
2,407,023
UNITED STATES PATENT OFFICE
2,407,023 "
ANTICORROSION PLUG
Harry A. Lockwood, Meriden, Conn., assignor to
Chandler-Evans Corporation, a corporation of
Delaware
Application June 25, 1942, Serial‘ No. 448,443
4 Claims.
1
(Cl. 215-37)
2
,My invention relates to anti-corrosion plugs.
at the usual, but not necessarily slightly rounded
It has among its objects to provide an improved
edge I I of the end wall thereof at that extremity
anti-corrosion plug. A further object of my in
of the plug I. Here it will also be noted that the
vention is to provide improved closure means for
closure 8 extends peripherally beyond the annu
such a plug which are of improved construction 5 lar contact thus provided between its concave
and cooperate in an improved manner therewith
portion I0 and the annular portion I I on the plug
in effectively sealing the dehydrating material in
the plug. Another object is the provision of such
an improved plug having a closure of such im
proved construction as to make it possible to ap
ply the closure readily and quickly while obtain
I in such manner as thereby to provide an over
hanging peripheral ?ange ‘portion I2. It will also
be observed that the concave portion II! is herein
10 extended out to the extremity of this portion I2
in such manner as to provide an inwardly tan
ing an effective seal, while also readily and quick
ly removing the closure whenever desired. A
still further object of my invention is to pro
vide improved concave closure means of a con
pered space I3 between the ?ange portion I2 and
' the body of the plug I.
In Order to seal the closure 8 to the plug I, a
15
struction adapted to be readily and inexpensively
manufactured and readily and quickly attached
small quantity of a suitable solvent for the plastic
material of plug I and closure 8 is applied to the
surfaces of the concave portion IQ of the closure
8 and the annular portion I I of the plug‘ I.
A quick-drying solvent is preferred. For ex
ample, ‘if the plastic is “Tem'te” (cellulose ace
tate butyrate), then the solvent used may be
over the perforated inlet of such a plug in such
manner as to cooperate therewith and with a
suitable sealing medium in an improved manner
to provide an improved very e?ective, yet readily
applied and separable, frangible sealing connec»
acetone. A small amount of the plastic material is dissolved, and when the solvent dries, the
tion between said closure means and the plug.
These and other objects and advantages of my
plug and closure are sealed to each other by an
improvements will hereinafter more fully appear. 25 integral annular connection of the same material
In the accompanying drawing, I have shown
as the plug and‘closure.
for purposes of illustration one embodiment
Obviously, the exterior of the closure 8 may as
which my invention may assume in practice.
sume different forms, but the same is preferably
In this drawing:
provided with a convex outer surface I5 diverg
Figure 1 is a side elevation of this form of my 30 ing slightly toward its periphery from the con
improved plug;
cave surface Ii! in such manner as to provide
Fig. 2 is a central longitudinal sectional view
such additional material in the flange portion I2
of the same;
as to provide a ?ange portion of substantial
Fig. 3 is an end view showing the closure car
strength.
rying end of the plug, a portion of the closure be
ing broken away to facilitate illustration, and
35 . As a result of my improved construction, it will
be apparent that the perforated air inlet 1 is
effectively sealed by the engagement of the con
cave portion III on the closure 8 with the portion
II surrounding the air inlet; the acetone acting,
in effect, to integrally unite the parts and thus
form a narrow and frangible sealing ring, readily
breakable by prying or knocking off the closure 8.
Moreover, the portion II will thus be effectively
sealed by the concave portion I0, regardless of
45 exact centering of the plug and closure, thus
Fig. 4 is an enlarged detail view of the inlet
end of the plug with my improved closure shown
in section to facilitate illustration.
In this illustrative construction, I have shown 40
an anti-corrosion plug, generally indicated at I,
and, as usual, preferably formed of a suitable
transparent plastic, as for example “Tenite” (cel
lulose acetate butyrate), and provided with a lon
gitudinally extending chamber 2 containing suit
able dehydrating or desiccating material such,
for example, as silica gel; the plug I herein being
provided at one end with a usual end member 4,
markedly facilitating and expediting sealing.
Within certain limits the closure or cap can have
its axis at an angle to that of the container body
and having a wrench receiving portion 5 inter
without interfering with the making of an effec
mediate its ends, an adjacent thread 6 adapted to 50 tive seal. The ?ange portion I2 also extends
be threaded in a spark plug aperture of an inter
beyond the periphery of the adjacent portion of
nal combustion engine, and at its opposite end
the plug I beyond the threaded portion 6 on the
being provided with an air inlet portion 1, here~
latter in such manner as not only to protect
in having a perforated portion ‘Ia preferably, but
the frangible seal I4, but also quite obviously to
not necessarily, slightly countersunk in that end 55 make it impossible for the plug with the closure
of the plug and sealed by my improved closure 8
8 thereon to be inserted in an engine spark plug
which is hereinafter more fully described.
aperture adapted to receive the threaded portion
This closure 8 preferably is formed of the same
6. Only after the cap has been removed can the
material as the plug I. As shown, it is provided
plug be placed in the spark plug hole of the
with an inner cupped face 9 having a peripheral 60 engine for desiccating the engine cylinder. The
concave portion I 0 engaging the inlet portion 1
provision of a separate closure of plastic also
2,407,023
3
4
therein and a sharp-edged peripheral surface
surrounding said aperture, and a closure member
of said material having a greater diameter than
makes it possible to provide such a closure of
different color from the plug in such manner as
thereby also to make even more obvious that this
closure should be removed. Due to the overhang
said peripheral surface and a concave surface
disposed toward said aperture, said surfaces per
ing flange l2 and the tapered space provided be
mitting a limited angularity of the axes of said
members while a continuous, substantially circu
lar line contact is maintained therebetween, said
tween the same and the body of the plug, it will
also be evident that for removing the closure 8,
either a suitable tool may be inserted under this
?ange with a slight prying action, or, if desired,
members being adapted when placed in contact
a blow may be struck on the under side of the 10 and upon the application of a solvent for said
material to the contacting surfaces thereof to
?ange, in such manner as thereby readily to sever
dissolve slightly in said solvent so that upon
the slender annular fragible seal I4. Moreover,
evaporation of said solvent, a narrow, easily
it will be noted that the construction is such that
frangible annular sealing connection is formed
the closure 8 is removable as a unit and with
between said casing and closure members.
out breakage while the frangible connection
2. A sealable container comprising a casing
breaks with a clean break in such manner as to
eliminate loose material which otherwise might
enter the cylinder. Also, due to the shape of the
cupped face 9 of the closure 8 and its spacing
from the perforated portion 1a of the air inlet,
as well as to the slight countersinking of the
portion ‘la, the perforations therein are also kept
clear of obstructing material. Space is conserved
and the removal of the cap facilitated by having
the peripheral part of the crowned cap extend
across the side wall of the body at an inclination
or angle to the body axis substantially .in the
manner shown. These and other advantages of
my improvements will, however, be apparent to
those skilled in the art.
The member 4 previously referred to is a closure
for that end of the plug which is outermost when
the plug is installed on the engine cylinder.
‘It will be appreciated that as it appears on the
market the improved article is a completely closed
member of plastic material having an aperture
therein and a sharp-edged peripheral surface
:; surrounding said aperture, and‘a closure mem
20 ber of said material having a greater diameter
than said apertureand a concave surface dis
posed toward said aperture, said surfaces per
mitting a limited angularity of the axes of said
members while a continuous, substantially circu
25 lar contact is maintained therebetween, said
members being adapted when placed in contact
and upon the application of a solvent for said
material to the contacting surfaces thereof to
dissolve slightly in said solvent so that upon
30 evaporation of said solvent, an integral annular
sealing connection is formed between said mem
bers, said closure member having a thickened
rim section providing, by virtue of its greater
35
and sealed capsule preferably of transparent
plastic containing a charge of desiccating mate
rial which is visible by virtue of the transparency
of the capsule, the latter including as a part
diameter, a prying edge which may be used to
break said connection and remove said closure.
3. A sealable container comprising a casing
member of plastic material having an aperture
therein and a sharp-edged peripheral surface
surrounding said aperture, and a circular closure
thereof a cap member preferably of the same 40 member of said material having a greater diam
plastic material as the body, preferably united in
one piece with the body as by the use of acetone
or other solvent in the manner previously de
scribed. In any event there is a relatively easily '
frangible seal between the cap and the body
which, however, is readily maintained while the
article is stored or not required for use. When
the article is required for use it cannot be ap
plied to the engine cylinder without breakage of
the seal because the external diameter of the cap
is greater than the minimum internal diameter
of the threaded (spark plug) socket receiving the
desiccating plug. From this it will be apparent
that the external diameter of the cap should be
in excess of the minimum diameter of the screw
eter than said aperture and a surface of arcuate
cross-section, said surfaces permitting a limited
angularity of the axes of said members while a
continuous, substantially circular contact is
maintained therebetween, said members being
adapted when placed in contact and upon the
application of a solvent for said material to the
contacting surfaces thereof to dissolve slightly
in said solvent so that upon evaporation of said
solvent, an integral annular sealing connection
is formed between said members, said closure
member having a'thickened rim section provid
ing, by virtue of its greater diameter, a prying
edge which may be used to break said connection
and remove said closure.
4. A sealable container comprising a casing
threads 6 formed upon the plug rearwardly of the
member of plastic material having an aperture
cap carried by the forward extremity of the plug.
therein and a sharp-edged peripheral surface
Upon removing the cap in the manner previously
surrounding said aperture, and a closure mem
described, the desiccating material is placed in
communication with the atmosphere through the 60 ber of said material having a greater diameter
than said aperture and a surface of arcuate
forward end of the capsule body containing the
cross-section, said surfaces permitting a limited
screen-like member ‘Ia. This screen-like mem
angularity ‘of the axes of said members while a
ber is, as a result of the removal of the cap, fully
continuous,
substantially circular contact is
uncovered.
While I have herein speci?cally described one 65 maintained th'erebetween, said members being
adapted when placed in contact and upon the ap
embodiment which my invention may assume in
plication
of a solvent for said material to the
practice, it will be understood that this form has
contacting surfaces thereof to dissolve slightly in
been chosen for purposes of illustration, and that
said solvent so that upon evaporation of said
the invention may be modi?ed and embodied in
solvent,
an integral annular sealing connection
other forms without departing from its spirit or 70
is formed between said members, said closure
the scope of the appended claims.
What I claim as new and desire to secure by
Letters Patent is:
1. A sealable container comprising a casing "
member of plastic material having an aperture 75
member providing, by virtue of its greater diam
eter, a prying rim which may be used to break
said connection and remove said closure.
‘
‘HARRY A. LOCKWOOD.
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