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Патент USA US2105790

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Jan. 18, 1938.
'J, J_ MASCUCH
~
2,105,790
RADIO SHIELDING FOR ELECTRICAL DISTRIBUTING SYSTEMS
Filed sept. 23, 1929
INVENTOR;
j
Argzgmzy.
' Patented Jan.
‘ 2,105,790
v
"umrso STATES PATENT OFFlCE,
- RADIO
2,105,790
SHIELDING FOR ELECTRICAL DIS-_
_ UTING
TRIB
SYSTEMS
Joseph J. Mascuch, Newark, N. 1.
Application September 23, 1929, Serial No. 394,618
43 Claims. (Ci. 123-—148)
This invention relates to an electric distribu
tion system for internal combustion engines and
particularly to a system of radio shielding for the
electric conductors used in the ignition system of
5 such engines and it has for an object to provide a
continuous metallic shielding for the high tension
conductors which is partly ?exible and water
prooi‘ed while at the same time maintaining the
insulation required on such conductors. This in
lo vention is a continuation in part of my co-pending
outlet l2 and encloses one conductor from the
conduit H to each spark plug. The term “spark
plug", as used herein, includes members carried
by the plug for the purpose of shielding the plug
itself.
applications, Serial Nos. 358,711, ?led April 2'1,
1929 and 360,936, ?ied May 6, 1929, and is more
particularly described inthe following specifica
tions and illustrated in the accompanying draw
ing, in which Fig. 1 is a conduit layout for a radial
type of engine as used in airplanes constructed ac
cording to my invention; Fig. 2 is a detail partly
sectioned, showing a connection to an engine cyl
indel‘; Fig. 3 is a section of the conduit used in
making a connection to a spark plug; Fig. 4 is an
20 enlarged detail of the spark plug connection and
?exible conduit partly sectioned and Figs. 5 and
6 are details of the connection between the elec
tric conductor and the terminal of the spark plug.
The use oi’ radio apparatus on airplanes, auto
25 mobiles, motor boats or other places where in
3
-
r
,
The spark plug 2| is provided with a stem 2|v
located in elbow 23 and which has a terminal 25
passing through the eye 21, Fig. 5, in the con
ternal combustion engines are used makes it
necessary to shield the high tension conductors
leading to the spark plugs to prevent inter
ference with the radio apparatus. For this pur
5
nector 26. The high tension conductor 22 com- .
prises the conducting wire 3i, Fig. 6, and the 10
rubber insulation. This wire is provided with a
terminal 29 formed in a ball 30 to which the wire
3| is soldered, the terminal being of the same
diameter as the insulation of the wire .and is in
serted in a socket 28 in the connector 26, the socket 15
28 is made with spring ?ngers to engage the ball
30 as the wire'is pushed into place. This forms a ’
universal connection between the stem of the
spark plug and the conductor 22.
The spark plug is provided with a.’ porcelain 20
elbow 23 which is s 'tably coated with a metallic
foil which is grounded on the engine frame and is
provided with the screw collar at 32 to which the
?exible conduit is attached.
The ?exible conduit i6 comprises an inner me
tallic hose of the type which is made from rolled
strip with interlocking joints and is commonly
used in the electrical industries for this purpose,
however, in the present case this hose is pref
erably made from aluminum strip. The over- so
lapping joints of the metallic hose are provided
pose the high tension connections to the spark ' with asbestos packing according to standard
plugs are insulated heavily and placed in metallic
conduits which are grounded on some part of the
mechanism. The present invention relates to the
construction of this conduit and to the features
whereby it is waterprooied.
In the drawing, II is a relatively rigid pipe
conduit in circular form which is placed around
the base of the cylinders of a radial type or motor
and is provided with screw outlets at l2 whereby‘
40
the conductors are led to the spark plugs. This
conduit is secured in place by the cleats I3 and
is provided with the yokes l4 connecting with the
magnetos of the engine which are not shown.
‘Where engines or types other than radialare
45
shielded, the conduit I i may be' made as a straight
tube, U-shaped, oval, or other shape, in one piece
or sectional, whichever may be best suited to a
particular engine. In Fig. 2, conduit II is shown
go in section with the high tension conductors It
placed therein and having a ?exible conduit it
connected by the screw collars N at one end to
the conduit H,- and at the opposite end to the
elbow ll, connected with the spark plug of the en
“ gine II. A ?exible conduit ii is connected to each
practice for making this hose waterproof. The
metallic hose is braided with a comparatively
?ne wire which may be ?nished by electroplating. 35
When double braided in this way the metallic
hose is completely protected against mechanical
abrasion and the braiding in combination with
the metallic hose provides complete radio shield
ing without making the wire unduly rigid.
40
The metallic hose is indicated at 31 and the
double braiding on the outside of the hose is in
dicated at 36 in Fig. 4.
At the ends a ?anged .
collar 35 is soldered to the'braiding and is secured
by the screw collar 34 against the collar 32. The
outer end of collar 32 is cone shaped and a rubber
gasket 33 is seated in this conical shaped cavity
and forced into engagement with the rubber
covered wire 22 by the screw attachment 34, thus
making it impossible for moisture to penetrate the 50
connection in the elbow 23.
This provides a complete metallic cover for the
conductor from the place where it connects with
the spark plug up to the connection to the mag
neto and, at the same time, provides a universal “
2
2,105,790
connection at the spark plug outlet which is pro
tected against moisture.
Where the ignition leads are separately shield
ed from the magneto to the spark plugs, the elec
trical capacitance of the shielding system with
relation to the ignition system is so high as to in
terfere with the functioning of the ignition sys
tem. This objection is overcome by grouping
adapted to be secured to an engine between the
magneto and the spark plugs and to enclose the
ignition wires thereof, and a plurality of elements
each connecting with the main element and
adapted to receive and shield individual wires,
said elements forming a continuous electrical
shield for the wires.
10. A shielding means for engines having a
the leads in a single manifold which materially
'10 reduces the electrical capacitance of the shield-_ magneto and spark plugs comprising a main ele
ing system.
ment adapted to be secured to an engine between
the magneto and spark plugs and to enclose the 10
Having thus described my invention, I claim;
ignition wires thereof, and a plurality of ele
1. In a radio shielding means for aviatiomen
gines having a circular contour, a tube shaped ments each removably connecting with the main
15 to conform to the contour of an engine and pro
element and adapted to receive and shield in
vided with a plurality of projecting outlets and dividual wires, said elements forming a continu 15
means for ‘removably attaching the tube to an ous electrical shield for the wires.
engine.
11. In a radio shielding means for internal
combustion engines a manifold to receive a pin2. In a radio shielding means for aviation en
20
circular contour, a tube shaped to rality of ignition wires. said manifold being pro
vided with a plurality of screw-threaded outlets 20
conform to the contour of an engine and pro
to permit the wires to extend from the manifold
vided with a plurality of projecting outlets and to
spark plugs.
means for attaching the tube to an engine com- ‘
12. In a radio shielding means for internalv
prising a plurality of cleats disposed on the tube.
25
3. In a radio shielding means for aviation en
combustion engines a manifold to receive a plu
rality of ignition wires., said manifold being pro
vided with a plurality of screw-threaded outlets
to receive conduits adapted to enclose wires be
tween the manifold and spark plugs.
‘13. A radio shielding means for internal come
bustion engines comprising a rigid conduit to 30
enclose and electrically shield a plurality of ig
nition wires and ?exible conduits to enclose each
wire from the rigid conduit to the spark plugs.
14. A'radio shielding means for internal com
bustion engines comprising a main conduit to
enclose and electrically shield a plurality of ig
nition wires and ?exible conduits to enclose each
40
40
15. A radio shielding means for internal com
oi' co-operating shieldingelements and to permit
bustion engines comprising a rigid conduit to
the passage of ignition wires and means to at
.45 tach the conduit to an engine.
6. In a radio shielding means for internal com
nition system.
50
to permit the passage of ignition wires and means
to attach the conduit to an engine.
7. In a radio shielding system for internal com
bustion engines having
55 plugs, a rigid
16. A radio shielding means for internal com
bustion engines comprising a rigid conduit to
enclose and electrically shield a plurality of ig 50
nition vwires and ?exible conduits to enclose each
wire from the rigid conduit to the spark plugs,
said rigid and ?exible conduits providing a con
tinuous shield to protect the ignition wires from
outside interference.
17. A radio shielding means for internal com
60
manifold being provided with outlets for single
wires, and ?exible conduits connected to said out
lets to enclose-single wires from the manifold to
the' spark plugs.
_
18. A radio shielding
bustion engines com means for internal com
a rigid conduit to
65
ii'old being provided with a relatively large open
ing to receive a plurality of ignition wires from
70 said distribution unit of the ignition system and
a plurality of relatively small projecting outlets
to permit individual ignition wires to extend from
the rigid manifold to spark plugs.
9. A shielding means for engines having a mag- ‘
76 neto and spark plugs comprising a main element’v
/
70
3
-
2,105,790 I
said rigid and ?exible conduits forming a liquid
proof housing for the ignition wires.
20. A shielding means for engines comprising a
main element adapted to be secured to an engine
and to enclose the ignition wires thereof, and a
plurality of ?exible elements each removably
connecting with the main element and adapted
to receive and shield an individual wire, said ele
ments forming a continuous electrical shield for
10
the wires,
30. In a radio shielding means for internal
combustion engines a rigid manifold, a plurality
of ignition wires carried in the manifold and ex
tending therefrom through outlets in the mani
fold and ?exible conduits, removably connected
to the manifold at the outlets to enclose wires
from the manifold to spark plugs.
31. In a radio shielding means for internal
combustion engines a main element, a plurality
of ignition wires carried in the main element and 10
I
21. A radio shielding means for internal com
bustion engines comprising a main element to en
close a plurality of ignition conductors and a
plurality of bendable coverings adapted to en
close ignition conductors between the main ele
around the extendedportio-ns of the wires between
the main element and spark plugs and means to
connect the metallic sheaths to shielding of the
spark plugs, said bendable sheaths being readily
15 ment and individual spark plugs, said bendable
coverings being readily detachable from the main
element.
extending therefrom, bendable metallic sheaths
A
22. A radio shielding means for internal com
bustion engines comprising'a central manifold
20 adapted to enclose a plurality of ignition-con
ductors and a plurality of ?exible shielding ele
ments to surround conductors from the manifold
to spark plugs, said ?exible elements being readily
from the central manifold.
25 detachable
23. A radio shielding means for internal com
bustion engines comprising a rigid conduit to en
close and electrically shield a plurality of igni
detachable from both the main element and the
shielding of the spark plugs.
32. In a radio shielding means for internal
combustion engines a main element, a plurality
of ignition wires carried in the main element
and extending therefrom, ?exible conduits sur
rounding the extended portions of the'wires be
tween thelmain element and spark plugs and
means to connect the ?exible conduits to shielding
of the spark plugs, said ?exible conduits being
readily detachable from both the main element
and the shielding of the spark plugs.
tion wires-and ?exible conduits to enclose wires
from the rigid conduit to individual spark plugs.
30
24. A radio shielding means for internal com
bustion engines comprising a main conduit to en
33. In a radio shielding means for internal com
bustion engines a main element, a plurality of ig-'
nitilon wires carried in the main element and ex 30
tending therefrom, ?exible conduits surrounding
the extended portions of theI wires between the
main element and spark plugs and screw
close and electrically shield a plurality of igni
threaded means to connect the ?exible conduits
tion wires and ?exible conduits to enclose wires to shielding of the spark plugs.
from the main conduit to individual sparkplugs, 34. In a radio shielding means for internal
said ?exible conduits being readily detachable
from the main conduit.
25. In a radio shielding means for internal
combustion engines, a main element, a plurality
of ignition conductors disposed in the main ele
40 ment, said conductors projecting from the main
element at various points and bendable metallic
' coverings enclosing the said projecting portions
of said conductors from the main element to
spark plugs, said bendable coverings being readily
detachable from the main element.
45
26. In a radio shielding means for internal
combustion engines a rigid manifold, a plurality
of ignition wires carried in the manifold and ex:
tending therefrom and bendable metallic sheaths
on the extended portions of the wires between
the rigid manifold and spark plugs. '
.
27. In a radio shielding means for internal
combustion engines a rigid manifold, a plurality
of ignition wires carried in the manifold and ex
tending ‘therefrom through outlets in the mani
fold and bendable metallic sheaths connected to
' the manifold at the outlets to shield the- extended
portion of the wires from the manifold to spark
60
plugs.
v
.
28. In a radio shielding. means for internal
combustion engines a rigid manifold, a plurality
of ignition wires carried in the manifold and ex
tending therefrom through outlets in the mani
fold and bendable metallic sheaths removably
connected to the manifold at the outlets to shield
the extended portion of the wires from the mani
fold to spark plugs.
_
29. In _ a radio shielding means for internal
combustion engines a. rigid manifold, a plurality
70 of ignition wires carried in the manifold and ex
tending therefrom through outlets in the mani- '
fold and ?exible conduits around the extended
portion of the wires between the manifold and
76
spark plugs.
combustion engines a main element, a plurality
of ignition wires carried in the main element
and extending therefrom, ?exible conduits sur
rounding the extended portions of the wires be 40
tween the main element and spark plugs and
means to ‘removably connect the ?exible conduits
to shielding of the spark plugs and to the main
element.
35. In a radio shielding means for internal
combustion engines a main element, a plurality
of ignition wires carried in the main element
and extending therefrom, ?exible conduits sur
rounding the extended portions of the wires be
tween the main element and spark plugs and 50
screw-threaded means to connect the ?exible
conduits to shielding of the spark plugs and to
the main element.
36. A radio shielding means for the ignition
system of an internal combustion engine compris
ing a rigid, sectional manifold, ignition wires en
closed in and electricallyrshielded by saidr‘sec
tions and ?exible shielding elements to enclose
and shield one or more ignition wires between
the sections of the manifold and the spark plugs 60
of the engine.
37. A radio shielding means for the ignition
system of an internal combustion engine compris
ing a rigid sectional manifold, said sections hav
ing means to join the sections together, ignition 65
wires enclosed in and electrically shielded by
said sections and ?exible shielding elements to
enclose and shield one or more ignition wires
between the sections of the manifold and the
0
spark plugs of the engine.
38. In vcombination with an internal combus- ‘
tion engine having an ignition system and spark
plugs, a radio shielding means for the ignition
system comprising a. plurality of rigid members
to enclose and electrically shield ignition wires
r
4
. 2,105,790
and ?exible shielding elements to enclose and vrigid members and the spark plugs, one end of
shield individual wires between the rigid members each ?exible element being removably connected
and the spark plugs.
to a rigid member and the opposite end connected
39. In combination with an internal combus~ , to
shielding on a spark plug.
tion engine having an ignition system and spark
plugs, a radio shielding means for the ignition
system comprising a plurality of rigid members
to enclose and electrically shield ignitionwires,
outlets on the rigid members and ?exible conduits
connected to the outlets to enclose and shield
one or more wires between the rigid members and
the spark plugs.
.
42. In combination with an internal combus
tion engine having an ignition system and spark
plugs, a. radio shielding means for the ignition
system comprising a plurality'of rigid members
to enclose and electrically shield ignition wires
and a plurality of ?exible shielding elements to 10
enclose and shield individual wires between the
rigid members and the spark plugs, one end of
each ?exible element being removably connected
40. In combination with an internal combus
tion engine having an ignition system and spark
a projecting outlet on one of the rigid members
plugs, a radio shielding means for the ignition I 'to
and the opposite end connected to shielding on a
‘system comprising a plurality of rigid members spark
plug.
to enclose and electrically shield ignition wires,
43.
In
combination
an internal combus
projecting outlets on the rigid members and tion engine having an with
ignition system and spark
?exible conduits connected to the outlets to en
plugs, a radio shielding means for the ignition
close and shield one or, more wires between the system comprising a plurality of rigid members
20
rigid members and the spark plugs.
to enclose and electrically shield ignition wires.
41. In combination with an internal combus
tion engine having an ignition system and spark ?exible shielding elements to enclose and shield
‘plugs, a radio shielding means for the ignition individual wires between the rigid members and
system comprising ‘a plurality oi’ rigid members _ the spark plugs, one end of each ?exible element
being removably connectedto a rigid member
to enclose and electricallyv shield ignition wires and
the opposite end connected to shielding on
and a plurality of ?exible shielding elements to a spark
plug and shielding on the spark plugs.
enclose and ‘shield individual wires between the
JOSEPH J. MASCUCH.
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