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Патент USA US3096415

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July 2, 1963
E. c. BETTONI
3,096,405
IGNITION DEVICE
Filed March 6, 1961
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INVENTOR.
EUGENE C. BETTONI
BY
ATTO NEYS
United States Patent 0 "ice
l.
3,096,405
Eugene C. Bettoni, Birmingham, Mich, assignor to Holley
Carburetor Company, Warren, Mich, a corporation of
Michigan
IGNETION DEVIQE
Filed Mar. 6, 1961, Ser. No. 93,624
13 Ciaims. (Cl. Mid-=31)
3,096,405
Patented July 2, 1963
2
ment about an axis spaced from and parallel to the axis
of the tubular shaft 32. The ‘cam 28 is ?xedly secured
to the tubular shaft 32 which is rotatable with the shaft
18 in its normal operation, but which is angularly adjust
able relative thereto to advance or retard the spark
timing.
An insulated rotor 34 having a spring-like electrical
contact 36 thereon is secured to the upper portion of
The present invention relates to ignition systems for
the tubular shaft 32 and is adapted to ‘be rotated thereby
internal combustion engines and more particularly, to the 10 normally in accordance with engine speed. Contact 36
construction and adjustment of a circuit breaker ‘assembly.
which is continually biased against the ignition coil input
In the past, different designs of circuit breaker assem
terminal 38 of the distributor cap‘ 40 is adapted to se
blies have been proposed wherein the rubbing blocks
quentially traverse the output terminals 42 of cap 40
were machined to maintain closer tolerances since the
( of which only one is shown) and is so positioned that
adjustable contact arm of each assembly was limited to 15 the two are in juxtaposition whenever the electrical dis
a small amount of movement. In such instances, the
charge occurs.
adjustment means employed were suilicient only to obtain
The shaft 18 is driven in accordance with engine speed
approximate settings of the rubbing blocks. If a more
by means of the gear 44. A condenser 46 is connected to
precise setting was desired in each assembly, it was re
the terminals of one of the’ contacts‘ 30‘ or’ 31 by means
quired to machine the rubbing block. This machining
of a wire 48.
process is undesirable since it. removes the hard polished
The adjustable breaker plate ‘23, as is clearly illus'—
surface of the cam-engaging portion of the rubbing block
trated in FIGURE 4, has adjustment slots 56 and 58.
which is vitally necessary for long rubbing block life.
The parallel sides of the slots 58‘ and 56' are at right
It is an object of the present invention to provide a
angles to each other, as is indicated in FIGURE 4, and
circuit breaker arm and bracket assembly which includes 25 are adaptable to receive the extended portions 60‘ and 61
means for adjusting the circuit breaker assembly to pre
of eccentrics 62 and 63 respectively which are both ?xed
cision accuracy and for eliminatnig the necessity of ma
in the ?xed breaker plate 20 as indicated at 65. Holes
chining the rubbing blocks.
64 and 66 are formed in the adjustable breaker plate 23
Another object of the present invention is to provide
to facilitate movement of the circuit breaker assembly‘
an improved ignition contact set characterized by economy 30 24 during adjustment. Opening 68 is provided in the
of production, simplicity of construction, and improve
breaker plate 23 and has a notch 70 therein. A notch
ment in operation.
'72 is also provided in the assembly plate 21. The standard
Other objects and features of the invention will be
come apparent as the description proceeds, especially
when taken in conjunction with the accompanying draw
ings, illustrating a preferred embodiment of the inven
tion, wherein:
FIGURE 1 is an elevational view, partially in cross
section, taken along the line 1——1 of FIGURE 2, showing
a distributor embodying the invention.
‘FIGURE 2 is a plan view of the invention taken along
the line 2-2 of FIGURE 1.
FIGURE 3 is a cross-sectional view taken along the
line 3--3 of FIGURE 2.
FIGURE 4 is ‘a plan view of the adjustable breaker 45
plate showing it completely separated from the remaining
parts of the circuit breaker assembly.
FIGURE 5 is a sectional view taken on line 5—5 of
FIGURE 2.
Referring now in greater detail to the drawings, FIG
URE 1 illustrates an ignition distributor 10 which com~
municates by means of suitable conduitry, not shown,
with a port in the carburetor, not shown. As usual,
the carburetor is located on the engine manifold in such
circuit breaker assembly 24 is adjustable by means of
a blade-type tool, such as a screwdriver, which is in
serted into notches 70 and 72. The assembly plate 21
is provided with a pair of slots 76 and 78.
The assembly of that portion of the distributor 10‘ em
bodying the invention‘ will now be described. The mov—
able or adjustable breaker plate 23‘ is placed on top of the
?xed breaker plate 20 so that the eccentric portions 69
and 61 are received in the slots 58‘ and 56 respectively.
The assembly plate 21 is placed on top of the plate 23,
as is illustrated in FIGURE 3, so that the adjustment slots
78 and 76 are superimposed over the holes 64 and 66
which ‘are formed in the movable breaker plate 23. Lock
ing screws 86‘ and 82 are inserted through the aforesaid
holes and slots so as to engage the threaded openings 84
and 86 provided in the ?xed breaker plate 20.
After
adjustment, the screws 86 and 82' are tightened.
In order to make the adjustments as taught by the in
vention, the screws 80 and 82 are loosened enough so
that reasonable force will enable movement of the circuit
breaker assembly 24 and the movable plate 23‘. In mov
ing or adjusting the assembly plate 21, a blade-type‘ tool
a manner so as to deliver a combustible mixture. The 55 is engaged between notches 70 and 72 and turned either
flow of the combustible mixture to the individual intake
right or left to the desired position of rubbing block 26
ports of the cylinders, located in an internal combustion
with respect to the cam 28.
engine, is controlled by a throttle Valve.
Further adjustment of the rubbing block 26 with re
The distributor 10 comprises a housing 12 including a
spect to the cam 28 may be made by turning either or
depending reduced portion 14 having an opening 16 there 60 both of the eccentrics 62 and 63 by placing a screwdriver
through for the reception of a driving shaft 18. The
in slots provided therein. Upward or downward move
upper end of the cup-shaped housing 12 is generally closed
ment of the movable plate 23 may be made by turning
by a ?xed breaker plate 20‘ which is secured to .the hous
eccentric 62, the direction of plate 23 depending upon the
ing 12 by means of a bolt 22. A movable breaker plate
23 is ?xed to the ?xed breaker plate 29 in .a manner to 65 movement of the eccentric 612. Horizontal movement to
the right or left, as viewed in FIGURE 2, is obtained by
be ‘subsequently described. A standard breaker arm
turning eccentric 63, the direction of movement of the
assembly 24 includes an assembly plate 21 and‘ a breaker
adjustable plate 23 again depending on the direction‘ of
arm ‘25 which carries a rubbing block 26 that is not ma
movement of eccentric 63. If so desired, both eccentrics
chined. The block 26 is engageable by the rotating cam
28 to effect, make and break the circuit at the contacts 70 62 and 63 may be turned. This would result in breaker
indicated at 30' and 31 in FIGURE 2. The arm 25 is
plate 23 moving between the vertical andh'orizo'ntal'direc
pivoted on a post 29 so as to provide for rocking move
tions. After the movable breaker plate 21 is adjusted
3:
3,096,405
and the contacts 30 and 31 are properly set, the screws 80
and 82 are tightened.
With the above construction, it may be seen that the
movable breaker plate 21 is adjustable for more precise
calibration after the primary adjustment is made in the
usual manner. This method of adjustment eliminates the
necessity of machining the end of the rubbing block, thus
reducing cost and increasing rubbing block life.
The drawings and the foregoing speci?cation constitute
4
breaker arm thereon, said breaker arm having a laterally
extending rubbing block thereon, primary adjustment
means for e?ecting an adjustment between the assembly
plate of said ignition contact assembly and said adjustable
breaker plate to obtain an appnoximate setting of said
rubbing block, and secondary adjustment means between
said adjustable and ?xed breaker plates for obtaining the
?nal setting of said rubbing block, said secondary adjust
ment means comprising a pair of movable eccentrics con
a description of the improved circuit breaker arm and 10 nected to said ?xed breaker plate, said eccentrics having
bracket assembly in such full, clear, concise 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:
portions received in adjustment slots provided in said
adjustable breaker plate.
5. A circuit breaker arm and bracket assembly as de
?ned in claim 4 wherein the parallel sides of said adjust
15 ment slots provided in said adjustable breaker plate are
l. A distributor mechanism comprising a drive shaft,
perpendicular to one another.
a cam carried by said drive shaft for rotation therewith,
6. A circuit breaker arm and bracket assembly‘ com
a ?xed breaker plate, an adjustable breaker plate on top
prising a ?xed breaker plate ‘having a pair of upwardly
of said ?xed breaker plate, an ignition contact assembly
extending eccentrics, an adjustable breaker plate having
mounted on said adjustable breaker plate and including a 20 slots therein for receiving portions of said eccentrics, a
pivotally mounted breaker arm having a laterally extend
pair of openings in said adjustable breaker plate, an
ing rubbing block thereon opposite said cam, primary
ignition contact assembly having a bracket with a pivot
adjustment means for effecting an adjustment between
ally mounted breaker arm thereon, a laterally extending
said ignition contact assembly and said adjustable breaker
rubbing block on said arm, a pair of fastening slots in
plate to obtain an approximate setting between said rub 25 said bracket overlying the openings in said adjustable
bing block and said cam, a pair of independently operated
breaker plate, primary adjustment means for effecting an
secondary adjustment means between said adjustable and
?xed breaker plates for obtaining the ?nal setting be
tween said rubbing block and said cam, and fastening
adjustment bet-ween said ignition contact assembly and
said adjustable breaker plate to obtain an approximate
set-ting of said rubbing block, secondary adjustment
means for holding said ignition contact assembly and said 30 means between said adjustable and ?xed breaker plates
adjustable breaker plate in a ?xed position after the afore
‘being obtained by changing the positions of one of said
said settings have been made, one of said secondary
eccentrics so as to obtain the ?nal setting of said rub
adjustment means being adapted to move said adjustable
bing block, and fasteners extending through said fasten
breaker plate in a ?rst direction substantially perpendic
ing slots and openings into threaded engagement with
ular to the axis of said drive shaft, and the other of said
said ?xed breaker plate for holding said ignition con-tact
secondary adjustment means being adapted to move said
assembly and adjustable breaker plate in a ?xed position
adjustable breaker plate in a second direction substan—
after the aforesaid settings have been made.
tially perpendicular to said ?rst direction.
7. A circuit breaker arm and bracket assembly de?ned
2. A circuit breaker arm and bracket assembly com
in claim 6 wherein the parallel sides of the slots in said
prising a ?xed breaker plate, an adjustable breaker plate 40 adjustable breaker plate are perpendicular to one an
other.
on top of said ?xed breaker plate, an ignition contact
assembly mounted on said adjustable breaker plate and
8. A circuit breaker arm and bracket assembly de?ned
including an assembly plate having a pivotally mounted
in claim 6 wherein one of said eccentrics is adapted to
breaker arm thereon, said breaker arm having a laterally
move said adjustable breaker plate in a ?rst direction
extending rubbing block thereon, primary adjustment
and the other eccentric is adapted to move said adjustable
means for effecting an adjustment between the assembly
breaker plate in a second direction which is perpendic~
plate of said ignition contact assembly and said adjustable
ular to the movement of the plate in the ?rst direction.
breaker plate to obtain an approximate set-ting of said
9. A distributor mechanism comprising a drive shaft,
rubbing block, and a pair of independently operated sec
a cam carried by said drive shaft for rotation therewith,
ondary adjustment means between said adjustable and 50 a ?xed breaker plate, an adjustable breaker plate on top
?xed breaker plates for obtaining the ?nal setting of said
of said ?xed breaker plate, an ignition contact assembly
mounted on said adjustable breaker plate and including
rubbing block, said pair of secondary adjustment means
an assembly plate having a pivotally mounted breaker
being effective to move said adjustable breaker plate in
directions which are approximately 90° apart.
arm there-on, said breaker arm. having a laterally extend
3. A circuit breaker arm and bracket assembly com
prising a ?xed breaker plate, an adjustable breaker plate
on top of said ?xed breaker plate, an ignition contact
assembly mounted on said adjustable breaker plate and
including an assembly plate having a pivotally mounted
55 ing rubbing block thereon opposite said cam, primary
adjustment means for effecting an adjustment between
the assembly plate of said ignition contact assembly and
said adjustable breaker plate to obtain :an approximate
setting between said rubbing block and said cam, a pair
of independently operated secondary adjustment means
between said adjustable and ?xed breaker plates for
obtaining the ?nal setting between said rubbing block
means for eifecting an adjustment between the assembly
and said cam, and fastening means for holding said
plate of said ignition contact assembly and said adjustable
assembly plate and said adjustable breaker plate in a
breaker plate to obtain an approximate setting of said
rubbing block, and secondary adjustment means between 65 ?xed position after the aforesaid settings have been
made, one of said secondary adjustment means being
said adjustable and ?xed breaker plates for obtaining the
breaker arm thereon, said breaker arm having a laterally
extending rubbing block thereon, primary adjustment
?nal setting of said rubbing block, said secondary adjust
ment means comprising a pair of eccentric pin and slot
connections between said breaker plates.
4. A circuit breaker arm and bracket assembly com
prising a ?xed breaker plate, an adjustable breaker plate
on top of said ?xed breaker plate, an ignition contact
assembly mounted on said adjustable breaker plate and
adapted to move said adjustable breaker plate in a ?rst
direction substantially perpendicular to the axis of said
drive shaft, and the other of said secondary adjustment
70 means being adapted to move said adjustable breaker
plate in a second direction substantially perpendicular
to said ?rst direction.
10. A distributor mechanism de?ned in claim 9‘ where
in said pair of independently operated adjustment means
including an assembly plate having a pivotally mounted 75 comprises a pair of eccentric connections.
3,096,405
6
11. A distributor mechanism de?ned in claim 10
wherein said eccentric connections each comprise a mov
able eccentric connected to the ?xed breaker plate and
having a portion received in a slot provided in the adjust
able breaker plate.
12. A distributor mechanism comprising a drive shaft,
a cam carried by said drive shaft for rotation therewith,
a ?xed breaker plate, an adjustable breaker plate on top
of said ?xed breaker plate, an ignition contact assembly
mounted on said adjustable breaker plate and including 10
a pivotally mounted breaker arm having a laterally ex
tending rubbing block thereon opposite said cam, pri~
mary adjustment 'means for effecting an adjustment be
tween said ignition contact assembly and said adjustable
breaker plate to obtain an approximate setting between
said rubbing ‘block and said cam, secondary adjustment
means between said adjustable and ?xed breaker plates
for obtaining the ?nal setting between said rubbing block
and said cam, and fastening means for holding said
ignition contact assembly and said adjustable breaker
plate in a ?xed position after the aforesaid settings have
been made, said secondary adjustment means compris
tending rubbing block thereon opposite said cam, pri
ing a pair of eccentric connections, one of said eccentric
connections being adapted to move said adjustable
breaker plate in a ?rst direction perpendicular to the axis
tween said ignition contact assembly and said adjustable
breaker plate to obtain an approximate setting between 15 of said drive shaft, and the other of said eccentric con
nections being adapted to move said adjustable breaker
said rubbing block and said cam, secondary adjustment
plate in a second direction perpendicular to said ?rst
means between said adjustable and ?xed breaker plates
mary adjustment means for effecting an adjustment be
for obtaining the ?nal setting between said rubbing block
direction, each of said eccentric connections comprising
a movable eccentric connected to the ?xed breaker plate
ignition contact assembly and said adjustable breaker 20 and having a portion received in a slot provided in the
and said cam, and fastening means for holding said
adjustable breaker plate.
plate in a ?xed position after the aforesaid settings have
been made, said secondary adjustment means comprising
References Cited in the ?le of this patent
a pair of eccentric connections, one of said'eccentric
connections being adapted to move said adjustable
UNITED STATES PATENTS
breaker plate in va ?rst direction perpendicular to the 25
2,115,462
Hittle _______________ __ Apr. 26, 1938
axis of said drive shaft, and the other of said eccentric
2,290,078
Thomas ______________ __ July 14, 1942
connections being adapted to move said adjustable
2,519,976
Phelon _______________ __ Aug. 22, v1950
breaker plate in a second direction perpendicular to said
2,727,104
Filko _______________ __ Dec. 13, 1955
?rst direction.
2,847,524Slick ________________ _._ Aug. 12, 1958
13. A distributor mechanism comprising a drive shaft, 30
a cam carried by said drive shaft for rotation therewith,
a ?xed breaker plate, ‘an adjustable breaker plate on top
of said ?xed breaker plate, ‘an ignition contact assembly
mounted on said adjustable breaker plate and including
a pivotally mounted breaker ‘arm having a ‘laterally ex
2,902,553
Bensinger ____________ __ Sept. 1, 1959
473,526
747,644
Great Britain _________ __ Oct. 14, 1937
France _______________ __ Apr. 4, 1933
FOREIGN PATENTS
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