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Патент USA US3076074

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JAn. 29, 1963
|-:. c. BETTONl ETAL
3,076,064
IGNITION CONTACTS '
Filed April 4, 1960
-
INVENTORS
EUGENE C.BETTONI
By FRED $.KERR
wéfe
ATTORN EYS
United States Patent 0 " "ice
1
3,076,054
Patented Jan. 29, 1963
2
proved ignition contact bracket and bracket set which are
3,®76,tl64
Eugene C. Bettoni, Birmingham, and Fred S. Kerr, Royal
Oak, Mich, assignors to Holley Carburetor Company,
EGNHTKGN CGNTACTS
Van Dyke, Mich” a corporation of Michigan
Filed Apr. 4, 196d, Ser. No. 19,897
7 Claims. (Cl. Zoo-19)
characterized by economy of production, simplicity of
construction, ease of assembly, and efficiency of opera
tion.
FIGURE ‘1 is a plan view of the ignition contact set.
FIGURE 2 is an end view of the ignition contact set.
FIGURE 3 is a view taken on line 3——3 of FIGURE 1.
The contact set shown in FIG. 1 is connected to a
breaker plate 10 and includes as one part thereof a con
The present invention relates to ignition systems and
contact sets. More speci?cally, the invention relates to 10 tact bracket 12 consisting of a substantially ?at base 13
which has elongated mounting openings 14 provided
ignition circuit breakers. The function of ignition c0n~
therein at opposite ends of the base 13 and in which are
tacts is to make and break the primary ignition circuit.
located bolts 16 which fasten the bracket 12 to the plate
Special consideration must be made in designing the
llt‘v. An elongated intermediate portion of the bracket is
contact bracket and the contact breaker or movable arm
so as to obtain reliable service and to provide an assem 15 struck out of the base 13 leaving an opening as indicated
bly which has durability and long life.
This invention utilizes a unitized construction, which
has only three major pieces fastened together with rivets
and which, in addition thereto, has pre-aligned contacts
which provide for permanent alignment throughout the
operating life of the set.
It is an object of the present invention to provide an
ignition contact set made of unitized construction and
having prealigned contacts.
at 15, the struck out portion being extended downwardly
to provide a locator pin or post 11 which is received in
a locating opening in the plate It) on which the contact
bracket 12 is mounted. An edge portion is turned up
wardly to provide a stiffening rib 17 which has integrally
formed therewith a connecting U-shaped portion 18, and
also a second integrally formed portion providing a
bracket arm 29 which extends outwardly from the por
tion 18 and lies in planes which are substantially per
It is another object of the present invention to provide 25 pendicular to the plane of the base 13.
an ignition contact set comprising three major com
ponents, including a contact bracket having an integral
bracket arm formed therewith, a movable arm which is
?xed to one end of said bracket arm, said movable arm
having a contact movable with respect to a permanent
contact carried by the other end of said bracket arm,
and a rubbing block carried by said movable arm.
Still another object of the present invention is to pro
The bracket 12 and bracket arm 20‘ form an assembly
which is made from a single stamping and is bent to ob
tain the appropriate shape as is best seen by referring to
the ?gures. The bracket arm 20 has a substantially ?at
part 22, an offset part 24 at one end thereof, and a hooked
Shaped portion 26 on the other end. The hooked shaped
portion '26 includes a semi-cylindrical portion 28 so as to
permit the bolt 16 to be readily inserted. Portion 26
terminates in an end portion 39 which is parallel to the
vide an ignition contact set having a bracket with a base
and a portion thereof turned upwardly and bent back a 35 flat part 22.. This is best shown in FIG. 1.
Mounted on the end portion or contact support arm 30
short distance parallel to said base and terminating in a
of the contact bracket 12 is a ?xed contact 32. Amovable
bracket arm which is spaced from said base and lies in
planes substantially perpendicular to the plane of said
arm 34-, which is made of spring steel, is connected at one
end thereof to the offset part 24 by rivets 36 and carries a
base and a movable arm connected on one end to said
bracket arm and carrying a contact on the other end 40 movable contact 33 on the other end, said arm 34 provid
thereof which is movable with respect to a permanent con
tact carried by said bracket arm, said movable arm being
made from spring steel and of such dimension so as to
provide the necessary contact forces between said con
ing the necessary contact forces between the ?xed con
tacts. The movable arm 34 is of rectangular cross sec—
tion and is bent or offset, as is best shown in FIG. 1, to
provide the contact forces between contacts 32 and 38.
45
A rubbing block dil- is fastened to the movable arm by
tacts.
rivets 42. The movable arm 34 is insulated from the
A further object of the invention is to provide an im
bracket arm 24! by insulating paper 44 so as to prevent
proved contact bracket formed of lightweight material
an electrical short circuit from the bracket arm 2b to the
from a single stamping, said bracket having a substantially
flat portion and having a part at one edge thereof turned 50 movable arm 34.
The present construction is extremely economical. The
upwardly and bent to form connecting means which ter
integral contact bracket and bracket arm unit are formed
minate in a bracket arm which is spaced from said flat
portion and which lies in planes substantially perpendicu
lar to the plane of said ?at portion.
A still further object of the invention is to provide an
improved ignition contact set comprising an integral con
tact bracket and bracket arm assembly, said bracket hav
ing a portion thereof bent to provide connecting means
from sheet metal by stamping and bending operations.
The movable arm assembly comprising the resilient spring
steel movable arm, contact and rubbing block is connected
to the bracket arm and insulated therefrom by suitable
insulating material. The resilient spring steel movable
arm is of suitable design and dimension to cause engage
ment between its contact point and the ?xed contact point
between the base and the bracket arm, said bracket ‘arm
lying in planes which are substantially perpendicular to 60 carried by the contact bracket arm. The breaker assem
bly is strong, rigid, and yet relatively light and is ar
the plane of said base, said bracket arm comprising an
ranged to have the necessary electrical conductivity.
offset end portion on one end thereof and having near
The advantages of this invention include lightweight
the other end thereof a substantially semi-cylindrical por
construction as well as the low cost in production, perma
nent alignment between the pre-aligned contacts and a
unitized type of construction. The present invention has
olfset end portion and carrying a permanent contact, a
eliminated the necessity of providing a bushing or cylin
resilient spring steel movable arm connected to the offset
drical bearing portion on which to mount the movable
end portion and carrying on the other end a movable con
arm assembly. In fact, the present bracket and bracket
tact which is moved into and out of engagement with
arm assembly is stiffer and more rugged than prior con
the permanent contact by the movement of the rubbing
70
tact brackets which utilize many additional parts.
block located on the spring steel arm intermediate its
tion which permits the insertion of a screw in said base,
said other end portion being substantially parallel to the
ends.
Another object of the invention is to provide an im
The drawings and the foregoing speci?cation constitute
a description of ignition contacts in such full, clear, concise
3,076,064
3
and exact terms as to enable any person skilled in the art
to practice the invention, the scope of which is indicated
by the appended claims.
What I claim as my invention is:
1. An ignition contact set comprising an integrally
formed sheet metal bracket having a base, a bracket arm
and means connecting said base and an intermediate por
tion of said bracket arm, said bracket arm being located
in planes which are substantially perpendicular to the
plane of said base, said bracket arm including an o?set
end portion on one end and a hooked end portion on
the other end, said end portions being spaced from said
base, said hooked end portion including a contact support
arm which is laterally spaced from the‘ intermediate por
tions of said bracket arm, a ?xed contact carried by said
contact support arm, a movable arm having one end con
nected to the offset end portion of said bracket arm, a con
tact on the other end of said movable arm movable into
and out of engagement with said ?xed contact, said mov
able arm being made from conductive spring material and
e?ective to bias itself in a direction to close said con
tacts.
2. An ignition contact set de?ned in claim 1 wherein a
portion is struck-out of said base to form an integral locat
ing post.
able into and out of engagement with said ?xed contact,
said movable ‘arm being made from conductive spring
material and eiieotive to bias itself in a direction to close
said contacts.
5. An ignition contact set de?ned in claim 4 wherein
a portion is struck-out of said base to form an integral
locating post.
6. An ignition contact set comprising an improved
bracket comprising an integral elongated sheet metal
member having a ?at base, a bracket arm and connecting
means between said base and an intermediate portion of
said bracket arm, said bracket ‘arm being located in
planes which are substantially perpendicular ‘to the plane
of said base, said base having an elongated stiiiening and
reinforcing ?ange bent up at one edge of the base, said
connecting means including a portion integrally con
nected to the upper edge of said flange and to the lower
edge of the intermediate portion of said bracket arm,
said bracket arm including an offset end portion and a
hooked end portion on opposite ends of said intermedi
ate portion, said end port-ions being spaced from said
base, said hooked end portion terminating in a contact
support arm which is laterally spaced from and parallel
to said intermediate portion, a ?xed contact carried by
25 said contact support arm, a movable arm having'one
3. An ignition contact set comprising an integrally
end connected to the offset end portion of said bracket
formed sheet metal bracket having a base, a bracket arm
arm, and a contact on the other end of said movable
arm which is movable into and out of engagement with
and means connecting said base and anintermediate por
tion of said bracket arm, said bracket arm being located
base and including an oifset end portion on one end and
a hooked end portion on the other end, said end portions
said ?xed contact, said movable arm being made from
conductive spring material and eliective to bias itself in a
direction to close said contacts.
7. An ignition contact set comprising an improved
being spaced from said base, said hooked end portion in
bnacket comprising -an integral elongated sheet metal
in planes which are substantially perpendicular to said
cluding a contact support arm which is laterally spaced
member having a fiat base, a bracket arm and connecting
from the intermediate portion of said bracket arm, and 35 means between said base and an intermediate portion of
a semi-cylindrical portion which permits fastening means
said bracket arm, said bracket arm being located in planes
which are substantially perpendicular to ‘the plane of said
to be readily inserted into said base, a ?xed contact car
base, said base having an elongated stiffening and rein
ried by said contact support arm, a movable arm having
forcing ?ange bent up [at one edge of the base, said con
one end connected to said offset end portion of said
necting means including a portion integrally connected
bracket arm, a contact on the other end of said movable
to the upper edge of said flange and to the lower edge
arm movable into and out of engagement with said ?xed
of the intermediate portion of said bracket arm, said
contact, said movable arm being formed of conductive
bracket arm including an offset end portion and a hooked
spring material and effective to bias itself in a direction to
close said contacts.
end portion on opposite ends of said intermediate por
4. An ignition contact set comprising an improved 45 tion, said end portions being spaced from said base, said
hooked end portion terminating in a contact support
bracket comprising an integral elongated sheet metal
arm which is laterally spaced from and parallel to said
member having a ?at base, a bracket arm and connecting
intermediate portion, ‘a ?xed contact carried by said con
means between said base ‘and an intermediate portion of
tact support arm, a movable arm having one end con
said bracket arm, said bracket arm being located in
planes which are substantially perpendicular to the plane 50 nected to the offset end portion of said bracket arm, a
laterally extending projection on said’ movable arm inter~
of said base, said connecting means, including a portion
mediate said ends forming a rubbing post, and a contact
of'sinuous con?guration integrally connected to one edge
on the other end of said movable arm which is movable
of said base and to the lower edge of the intermediate
intro and out of engagement with said ?xed contact, said
portion of said bracket arm, [said bracket arm including
movable arm being made from conductive spring ma
an o?set end portion and a hooked end portion on op
terial and effective to bias itself in a direction to close
posite ends of said intermediate portion, said end por
said contacts.
tions beingspaced from said base, said hooked end por
tion terminating in a contact support ‘arm which is
References Sited in the tile of this patent
laterally spaced from and parallel to said intermediate 60
UNITED STATES PATENTS
portion, a ?xed contact carried by said contact support
arm, a movable arm having one end pivotally connected
to the o?set end portion of said bracket arm, and’ a con
tact on the other end of ‘said movable arm which is mov
2,559,568
2,820,857
2,835,755
Hooven ______________ __ July 3, 1951
Thomas ______________ __ Jan. 21, 1958
Filko ________________ __ May 20, 1958
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