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Патент USA US2407076

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Sept. 3, 1946.
'J. R. HARKNESS
2,407,076 '
FLUID-TIGHT RADIO SHIELDED JOINT
Filed Sept. 11, 1944
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Inverwtor.
Joseph
Rdljflfkness,
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‘W1
y 'H?i/‘g/Attof?ey
Patented Sept. 3, 1946
2,407,076
UNITED‘ STATES PATENT OFFICE
2,407,076
FLUID-TIGHT RADIO SHIELDED JOINT
Joseph R. Harkness, Schenectady, N. Y., assignor
to General Electric Company, a corporation of
New York
Application September 11, 1944, Serial No. 553,584 '
7 Claims.
1
(Cl. I'M-35)
2
.
My invention relates to fluid-tight radio
shielded joints between two ignition system
metallic members for providing good electrical
contact between the two members at the joint
and for preventing the escape of pressurizing
fluid contained in the members.
'
An object of my invention is to provide an
improved ?uid-tight radio shielded joint.
in the members I and 2, respectively, for securing
together these metallic members for biasing the
resilient members 5 and 6 into intimate?uid
tight contact with the deformable metal washer
1 and for biasing opposite sides of the deform
able washer into good electrical contact with
the adjacent surfaces of the metallic members I
and 2. Thus, the resilient members 5 and 6
Further objects and advantages of my inven
form fluid-tight joints with the washer ‘l, and
tion will become apparent and my invention will 10 the washer ‘l forms a good radio shield com
be better understood from the following descrip
tion referring to the accompanying drawing, and
pletely around. the joint between the metallic
the features of novelty which characterize my
While I have illustrated and described a par
members I and 2.
,
invention will be, pointed out with particularity
ticular embodiment of my invention, modi?ca
in the claims annexed to and forming part of 15 tions thereof will occur to those skilled in the
this speci?cation.
'
~
art. I desire it to be understood, therefore, that
The drawing is a longitudinal sectional view
my invention. is not to be limited to the par
through a pair of metallic members for an igni
ticular arrangement disclosed, and I intend in
tion system which is provided with an embodi-,
the appended claims to cover all modi?cations
ment of my improved ?uid-tight radio shielded
which do not depart from the spirit and scope
joint construction.
'
of my invention.
In ignition systems,‘ it is sometimes desirable
What I claim as new and desire to secure by
to pressurize the interior of certain elements,
Letters Patent of the United States is:
and it is, therefore, necessary to provide a ?uid
1. A ?uid-tight‘ radio shielded joint for adja
tight joint between the elements to prevent the ‘ cent surfaces of two metallic members each
loss of the pressurizing ?uid. In addition, it is
formed with a peripherally ‘extending groove
also desirable that a good electrical shield should
therein, a resilient member in each of said
be provided at the joint to prevent radio inter
grooves extending axially beyond the outer edges
ference. In my improved ‘construction, a fluid
of each of said grooves, a deformable electrically
tight radio shielded joint for the adjacent sur
conductive washer arranged axially between and
faces of'two ignition system metallic members
to extend transversely over both of said resil
i and 2 is formed by the combination of resilient
ient members, and means for biasing said resil
deformable ?uid-sealing members and a deform
ient members into intimate ?uid-tight engage
able electrically conductive member. The two
ment with said deformable washer and for bias
metallic members i and 2 are formed with pe 35 ing the parts of the opposite sides of said de
ripherally extending grooves 3 and 4 which are
formable washer from each of said resilient mem
offset from each other such that the groove 3
bers into good electrical contact with the adjain one of the members is arranged on the outside
cent surfaces of said metallic members.
of the groove 4 in the other member and is
2. A fluid tight radio shielded joint for adja
closely adjacent thereto. The inner edge of the 40 cent surfaces of two metallic members each
groove 3 is arranged substantially over the outer
formed with a peripherally extending groove
edge of the groove 4, and resilient members 5 and
therein, a resilient'member in each of said grooves
G are arranged in the grooves 3 and 4 and extend
extending completely around the periphery of
completely around the periphery of the grooves
said grooves and extending axially beyond the
and have a cross section such as to extend axially 45 outer edges of each of said grooves, a deform
beyond the outer edges of the grooves 3 and 4.
A deformable electrically conductive metallic
washer 7. such as a piece of 0.01 inch thick alu
minum in the form of a ring, which conforms
generally to the peripheral contours of the com
bined grooves 3 and 4 and having a width suf
ficient to extend transversely over both of the
resilient members 5 and 6 is arranged between
these resilient members, and a plurality of bolts
8 extend through openings in ?anges 9 and Ill
able electrically conductive metallic washer ar
ranged axially between and to extend trans
versely over both of said resilient members, and
means for biasing said resilient members into
intimate fluid-tight engagement with said de
formable washer and for biasing opposite sides
of said deformable washer into good electrical
contact with the adjacent surfaces of said metal
lic members.
3. A ?uid-tight radio shielded joint for ad-
2,407,076
3
4
jacent surfaces of two metallic members each
formed with a peripherally extending groove
into intimate ?uid-tight engagement with said
deformable washer and for biasing opposite sides
of said deformable washer into good electrical
grooves extending completely around the periph
contact with the adjacent surfaces of said me
cry of said grooves and extending axially beyond iii tallic members.
6. A ?uid-tight radio shielded joint for adja
the outer edges of each of said grooves, a deform
cent surfaces of two metallic members each
iable electrically conductive metallic washer hav
formed with a peripherally extending groove
ing a width. su?icient to extend transversely
over both of'said resilient members and arranged
therein, the groove in one of said‘ members being
between said resilient members, and means for 10 offset towards the outside of the groove in the
other of said members and arranged closely ad
securing together said metallic members for bias
jacent thereto, a resilient member in each of
ing said resilient members into, intimate fluid
tight engagement with said deformable washer
said grooves extending completely around the pe
riphery of said grooves and extending axially be
and for biasing opposite sides of said deform
yond‘ the adjacent, surfaces of said metallic mem
able washer into good electrical‘ contact with the‘
bers, a deformable electrically conductive metal
adjacent surfaces of said metallic members.
licwasher, conforming generally to the peripheral
4. A ?uid-tight radio shielded joint for adja~
contours of said groove and having a width suf
cent surfaces of two ignition system metallic
?cient to extend transversely over both of said
members each formed with a peripherally extend
ing groove therein, a resilient member in each of 20 resilient members and arranged between said re
silient members, and‘ means for securing‘ together
said grooves‘ extending completely’ around‘ the
said metallic members for biasing said resilient
periphery of ’ said, grooves and extending axial
members into. intimate ?uid-tight engagement
1y beyond the’ outer'edges of each of said grooves,
with said deformable washer‘ and'for biasingop~
a deformable electrically conductive metallic
washer conforming generally to the peripheral
posite sides of said resilient washer‘ into good
electrical contact with-the adjacent‘ surfaces of
contours of 'said grooves and having a width suf
?ci'ent‘ to extend‘ transversely over both of said
said metallic members.
'7. A ?uid-tight radio shielded joint for adja
resilient‘ members and arranged between said re~
cent surfaces of two ignition system metallic
silient members, and‘ means for securing together
members each formed with a peripherally ex
said‘ metallic members for biasing said resilient
members into intimate‘ fluid-tight engagement
tending groove therein, the groove'in one/of said
members being offset towards the outside of the
with said deformable washer and for biasing op
posite sides of‘ said deformable washer into good
groove inv the other of said members and ar
electrical contact with the adjacent surfaces of
ranged closely adjacent thereto, a resilientmem
ber-in each of said grooves extending completely
said metallic members.
5. A fluid-tight‘ radio shielded joint for adja
around the periphery of said metallic members
and extending axially beyond the outer edges of
cent‘ surfaces‘ of two metallic members each
formed with a peripherally extending‘ groove
each of said grooves, a deformable electrically
conductive metallic washer conforming‘ generally
therein, the groovein one of said members being
offset towards‘ the outside of the groove in‘ the
to the peripheral contours of said grooves and
other of said members and arranged‘ closely ad
having a Width sufficient to extend transverse
jacent thereto; a resilient member in‘ each of said
1y‘ over both of‘ said resilient members and ar
grooves extending'completely around the‘ periph
ranged‘ between said resilient members, and
cry‘ of said grooves and extending axially beyond
means‘ for securing‘together said metallic mem
the outer edges of‘ each of said grooves, a de
bers for'biasing'v said resilient members into inti
mate ?uid-tightengagement with said deform
formable. electrically‘ conductive metallic washer
conforming generally to the peripheral contours
able washer and‘ forbiasingopposite sides of said
of" said grooves‘ and arranged between and to ex
deformable washer‘ into‘ good‘ electrical contact
tend transversely over both of saidlresilient mem
with the adjacent‘ surfaces of ‘said metallic mem
bers, and means for'securing together said me
bers.
JOSEPH? R; HARKNESS‘.
tallic members'for biasing said resilient‘members
therein, a resilient member in each of said
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