close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2135624

код для вставки
Nov. 8, 1938.
|-|_. RABEZZANA
2,135,624 `
SPARK PLUG
Filed June 1, 1957
'
2 sheets-sneu 1
NOV» 8', 1938.
H. RABEzz‘AÑA
2,135,624
SPARK PLUG
Filed June l, 1937
‘ 2 Sheets-Sheet 2
Patented Nov. 8, 1938
2,135,624 '
UNITED STATES PATENT "OFFICE
l
2,135,624
SPARK PLUG
Hector Babemna, Flint, Mich., assignor to Gen
.
eral Motors Corporation, Detroit, Mich., a cor
poration of Delaware
Application June 1, 1937, serial No. 145,662
5Claims. (Cl. 123-169)
My invention relates to spark plugs and the
object thereof is to provide an improved single
piece plug, wherein the parts which comprise the
same are permanently secured together and pro
5 vide a unitary structure, which is simpler in con
tion engine, and the upper or outer end of which
has a flange I2; and the numeral I3 designates
the insulating member of the plug which is com
monly made of porcelain or similar ceramic mate
rial, and the lower end of which extends into the 5
struction than has heretofore been the case in _
threaded
part of the base as shown. 'I'he in-_
plugs of that type; and which, while gas tight and sulated member
has a passage extending longi- .
eßective for the service required >oi’ it, may be tudinally through it for the central electrode,
made at less cost than heretofore. A further the lower end I4 of which is disposed adjacent
10 feature of advantage inherent in my invention the grounded electrode I5 as is usual in spark 10
consists in that the insulating member of the plugs. The base member'is substantially the
plug remains cooler than has usually been the same
each of the forms of my invention illus
case in single piece spark plugs, this being due trated.inas
is also the insulating member I3, a1
to the fact that the external atmosphere has though the enlarged central part thereof is some
` l5 free access to a considerable part of the periph
what shorter in ,Figures 4, 6, 7 and 9 than in 15
eral surface thereof.
Figures 1 and 2.`y _
- _ 'I'he drawings accompanying and forming a
part of this specification illustrate various em
„
bodiments of my invention, and the features
'I'he central part of the insulating member is
enlarged as at I6, as is usual in spark plugs, and
a lower annular shoulder thereof rests upon the
20 wherein the same consists are particularly flange I2 whereby the insulating member is sup- 20 pointed out and claimed in the concluding claims. _ ported from the base. As is also usual in spark
In the drawings:
e
plugs the base or iiange is shown as provided with
Figure v1 is a view showing the metal parts in a narrow annular ridge I1 for securing a. more
section, and the insulating member of my im
perfect gas tight joint as the parts of the plug
25 proved spark plug in side elevation.
are assembled under pressure as will hereinafter 25
ì Figure 2 is a view showing the entire plug in appear.
side elevation, so that a better understanding
The numeral I8, Figures 1 and 2, designates an
may be had as to how the external atmosphere Iannular substantially cylindrical holding mem
has direct access to the central part of the in
ber which surrounds the upper part of the in
30' sulating member.
Figure 3 is a view showing a-section upon a
transverse plane indicated by the line 3_3,
' Figure 1.
'
Figure 4 is a view showing a half sectlon'and
35 half elevation of a modined form of my inven
tion.
I
Flgln'eäisaviewshowingasectionupona
_transverse plane indicated by the line 5_5,
Figure 4.
ì
’
40
Figure 6 ~is a view showing a half section and
_half elevation of a spark plug similar to the one
` shown ‘in Figures 1 and 2, but wherein the an-'f
nular holding member thereof Áis modined.'
_
Figures ’I and 8 are sectional and fragmentary
45 Aviews showing-_another form of my invention.
Figure 9 is a view showing the metal parts in
_ section and the insulating member in side eleva
tiòn, of a mpdifled i'orm of my invention.
_Figure 10 is a view showing a section upon a
50 transverse plane indicated by the line II-II,
Figure 9.
Referring now to the drawings, the numeral Il
designates an annular base member the lower or
inner end of which is threaded to screw into an
55 opening in the cylinder of an internal combus
sulating member, and has an inwardly extending 30
flange I9 at its upper end. 'I'he insulating mem
ber has an upper annular shoulder 20; and 2i
is an annular metallic member c-shaped in cross
section and which is made of resilient material,
this member being interposed between the ñange 35
I8 and the shoulder 20. In assembling the parts
pressure is applied to the upper end of th‘e hold
ing member I8 (the base member I I being sup
ported upon the anvil of a suitable press) where
upon the resilient washer or gasket member 2| is 40
distorted by compression and acts as a strong
_and stiff spring to force the insulating member
against the base throughout the life of the plug.
'I'he holding member is shown as having 'a series
of depending lugs _22 which contact with the 45
periphery of the annular flange I2, and the lower
-ends of these lugs are welded, brazed or otherwise
' fastened to said flange while- pressure is Vmain
tained between the holding member and the base
and the annular member 2| is held under com- 50
pression, whereby the parts of the plug are held
in a_ permanently assembled condition with the
member 2| under stress during the life of the
plug.
Figures 4 and 5 show a form of my invention 56
2
2,135,624
wherein the annular holding member and the
parts will in many cases form a satisfactory
resilient member or gasket which acts to force
the .insulating member against the base are made
integral with one another, as distinguished from
as separate elements as in Figures l and 2; said
member being made for example from spring steel
ñat stock and having an inwardly curved part or
ring 23 which is C-shaped in cross section which
is pressed against the annular shoulder 20 of the
insulating member when the parts are assembled
method or holding the parts together although
the lower ends of the lugs may be brazed 'or
welded in place in the groove, thus forming a
stronger and more secure connection between
the annular holding member and the base o!
the plug.
Having thus described and explained myA in
vention I claim and desire to secure by Letters
10
Patent:
, under pressure, as aforesaid, the annular holding
member of which the G-shaped ring 23 is a part
having also a series of depending lugs 2l, the
lower ends of which are secured, preferably by
15 welding or brazing, to the annular flange i2 be
fore the pressure whereby the part 23 is com
l. In a spark plug, an annular base having an
inner externally threaded part, and an annular
liange at its outer end; an insulating member
supported by said base and extending into said
pressed so as to set up stress therein is relieved,
thus and as in the form of my invention first de
scribed holding the parts of the plug together and
20 providing a unitary spark plug.
It will be seen that in both the forms of my in
vention thus f ar described the lugs 22 and 24 are
l spaced quite widely apart so that the surround
ing atmosphere has comparatively free access to
25 the insulating member of the plug, which results
in that the insulating member is kept cooler than
Would be the case if the openings or recesses be
tween the lugs were not present.
Figure 6, however, shows a form of my inven
30 tion wherein such openings are not present. In
this form the cylindrical holding member 25 ex
tends to the ñange l2 and iits about the periphery
thereof, and is fastened thereto while the parts
of the plug are held together under compression,
the saine as in all the forms of my invention
herein described. The holding member 25 while
it has no openings between depending lugs is
commonly slitted up from the lower end thereof
to insure better contact with the iiange i2 dur
40 ing welding of the parts together, as indicated by
the reference numeral 26.
Figures 'l and 8 illustrate a form of my inven
tion wherein the annular holding member is in
the form of an upper narrow ñange 2l having
45 depending lugs 28 integral therewith and the
lower ends or’ which are welded or brazed te the
flange i2 of the annular base il; and wherein
the annular resilient C-shaped member 2B ap
proaches more nearly a torus than does the
50 equivalent member 2l in Figures l, 6 and 9. This
member 29 is held under compression in the iin
ished plug between the ñange 21 and the annular
shoulder 3i) of the insulating member the same as
in the other forms of my invention herein de
55 scribed.
Figures 9 and 10 illustrate a form of my inven
tion wherein the member 3l which holds the
parts of theplug together and in permanently
assembled relation is of conical rather than
60 cylindrical form, and wherein the lugs 32 have
hook-like extremities which enter a groove 33 in
the flange i2 as the parts are assembled. The
part 3l has a flange 34 at its upper end which
holds a c-shaped resilient member 35 made, for
65 example, of spring steel, between itself and an
threaded part, and having an annular shoulder; 15
an annular holding member surrounding said
insulating member and having depending lugs
which are fastened to said annular ñange, to
thereby hold said insulating member permanently
assembled with said base; an annular metallic 20
and resilient member arranged between said
holding member and said shoulder; a central
electrode extending through a passage in said
insulating member; and a grounded electrode at
the inner extremity of said threaded portion.
25
2. In a spark plug, an annular base having an
inner externally threaded part, and an annular
flange at its outer end; an insulating member
supported by said flange and extending into said
threaded part, and having an annular shoulder 30
spaced apart from said flange; an annular hold
ing member surrounding said insulating member
and extending above said shoulder and having
an inwardly extending flange at its upper end,
and which holding member has depending lugs 35
which are welded to said annular flange to there
by hold said insulating member permanently as»
sembled withl said base; an annular metallic and
resilient member arranged between the ilange
at the 'upper end of said holding member and 40
said shoulder; a central electrode extending
through a passage in said insulating member;
and a grounded electrode at the inner extremity
of said threaded portion.
3. In a spark plug, an annular base having an 45
inner externally threaded part, and an annular
flange at its outer end; an insulating member
supported by said ilange and extending into said
threaded part, and having an annular shoulder
spaced apart from said flange; an annular hold 50
ing member cylindrical in form surrounding said
insulating member and extending above said
shoulder and having an inwardly extending
ñange at its upper end, and the lower end oi'
which holding member is fastened to the periph 55
ery of said annular flange to thereby hold said
insulating member permanently assembled with
said base; an annular metallic and resilient mem
ber C-shaped in cross-section arranged between
'the flange at the upper end of said holding mem 60
ber and. said shoulder; a central electrode ex
tending through a passage in said insulatinß
member; and a grounded electrode at the inner
extremity of said threaded portion. .
4. In a spark plug, an annular base having an 65
inner externally threaded part, and an annular
ilange at its outer end; an insulating member
holding member 3i with its lugs @i2ì partially ’ supported by said flange and extending into said
bent inward is pressed toward the base il, thus threaded part, and having an annular shoulder
spaced apart from said flange; an annular hold
70 subjecting the C-shaped member 35 to com
pression and producing a permanent distortion ing member cylindrical in form surrounding said
thereof and stress therein and, while the parts insulating member and extending above said
shoulder and having an inwardly extending
are held under compression, the hook-shaped ex
tremities of the lugs 32 are forced inward and ñange at its upper end, and which holding mem
into
the groove 33. Engagement between these ber has depending lugs the lower ends of which
75
annular shoulder 36 upon the insulating member
I3; and during the assembling of the parts the
2,185,624
are welded to the periphery or said annular
flange to thereby hold said insulating member
permanently assembled with said base; an an
nular metallic and resilient member C-shaped
in cross-section arranged between the flange at
the upper end of said holding member and said
shoulder; a central electrode extending through
a passage in said insulating member; and a
grounded electrode at' the inner extremity of said
threaded portion.
5. ïn a spark plug, an annular base having an
inner externally threaded part, and an annular
ñange at its outer end; an insulating member
supported by said annular ñange and extending
into said threaded part and having an annular
3
shoulder; an annular holding member separate
from said base surrounding said insulating mem
ber and having an inwardly curved upper end
which is c-shaped in cross-section, and resilient,
and which inwardly curved upper end overlies
the shoulder aforesaid, the lower end of said hold
ing member being welded to the periphery oi?
said annular iiange to thereby hold said insulat
ing member permanently assembled with said
. base; a central electrode extending through a 10
passage in said insulating member; and a
grounded electrode at the inner extremity of said
threaded portion.`
HECTOR RA'BEZZANA.
15
Документ
Категория
Без категории
Просмотров
0
Размер файла
477 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа