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Патент USA US2113903

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2,113,903
Patented Apr. 12, 1.938
1 UNITED. STATES
PATENT OFFICE
2,113,903
SPARK CONTROLLING MECHANISM
John R. Rippe, Fresno, Calif.
Application April 21, 1934, , Serial 'No. 721,702
5 ‘Claims. (01. 1723-143‘)
My invention relates tomeans for controlling
thetiming of ignition sparks in an internal com
bustion engine, and is particularly concerned with
a means for varying the time of occurrence of such
sparks.
.
.
i
.
‘An object or my invention is to provide an
automatic means for suitably timing the oc
currence of a spark in an engine' .
i.
'
Another object of my invention is to provide as at 43.
Somewhat similarly, the lever I2 is adapted 10
means which willa?ord at least two entirely
also to co-operate with a terminal 46 which is
separate times of ignition ‘in an ‘engine, in re
joined by a conductor 41 to an electrically con
sponse to operating conditions of the engine.
A further object of my inventionis to simplify ' ducting lever 48 oneend of which is connected
materially the spark timingmechanism of an by a pivot 49 to a bracket 5| mounted on but
electrically isolated from the support 28 by an 15
ignition system.
The foregoing and other objects are attained insulator 52. The lever 48 likewise carries a
in the embodiment of theinvention shown in the contact 53 which is adapted to co-operate with a
contact 54 .mounted on the electrically insulated
drawing, in which i
v
’
.
‘
Fig. l is a schematic diagramiof a controlling base 32 and isolated electrically fromthe con
tact 3| by an insulator 56. The contact 54 is O
mechanism constructed in accordance with my in
connected to one end of the primary 5‘! of a second
vention and responsivelto voltage conditions.
. Fig. 2 is a schematic diagram oi'a modi?ed ignition coil 53, the other end of the primary be
O.
spark controlling mechanism of my invention,
being responsive to oil pressure 'in the engine.
In its preferred form, thenspark controlling
mechanism of my invention is for use in connec
tion with an engine having an ignition circuit, and
includes a spark retard circuit interrupter and a
'
on but electrically insulated from a suitable sup
port 32 and leading to one end of the primary 33
of a suitable ignition coil 34, the other end of the
primary being ‘connected to ground as at 36. The
secondary 31 of the coil 34 isconnected by a lead GI _
38 to a conventional distributor 39 from- which
extend individual circuits 4| leading to spark
plugs 42 which ?nally are connected'to ground
' spark‘advance ‘circuit interrupter either of which
is optionally includablelin the circuit in response
to a condition of the operation of the engine-for
instance, in response to oil pressure in the en
gine lubricating system, or in response to a voltage
condition or the engine generator system. .
35
In the form of thelinvention disclosed in Fig.
L'there'is an ignition circuit including a source
of‘ electricity, such as a battery 15‘ which at one
'40
side is grounded as at l and at the other side is
connected through anammeter .8 and a lead 9 to
a master switch I0. From the master switch III
a lead I | extends to a switch lever |2 which ‘at
one end is ‘pivoted to a support |3 by-a pin l4
for oscillation between suitable stops l6 and l1.
The support is mounted on any suitable base -|8
but is electrically insulated therefrom by a non
conducting pad |9.~ :The'lever l2 itself is elec-l
trically conducting and col-operates with a con
ductor 2|, having a terminal22, which leads to
' a spark retard ‘circuit-interrupter lever 23.
Lever 23, which is electrically conducting, is
pivoted at one end by a pin '24 mounted on a
bracket 26 connected through a suitable electric
insulator 21 to a support 28; The other end of
55
ing joined to ground, as at 59. The secondary
6| or the coil 58 is connected to the lead 38 and
therefore is in electrical communication. with the
distributor 39 and the various spark plugs 42.
The contacts 53 and 54 as well as the contacts
29 and 3| can be bridged by condensers, not
shown,~_in the usual Way.
In order that the lever 23 will be effective to 30 .
operate the contacts 29 and 3| to ‘interrupt the
circuit to produce a relatively retarded spark, ‘
there is provided on the lever 23 an electrically in
sulating abutment 62 which in e?ect is a cam
follower operating against a multi-lobed cam 63 :35
mounted to rotate in the direction of the arrow
64 in‘ time with the operation or the engine to
which the system pertains. The position of the
abutment 62 with respect to the cam. 63 is such
that the contacts 29 and 3| are separated to pro
duce a so-called retarded spark in the spark
plugs
42.
'
y
,
‘
'
‘
‘
Thelever 48 is likewise provided with an elec
trically insulatingprojection 63 which is so lo
cated, however, as to be contacted by the lobes 45 I
of the cam 63 at'such a time in the rotation, of
the shaft as to produce a so-called advanced
spark, by separation or the points Y53 and 54.
Thus, when the points 29 and 3| are in circuit
there is a retarded spark at the spark- plugs 42, 50
while when‘ the contacts or interrupters 53 and
54 are in circuit an advanced spark is produced
the lever is provided with a contact 29 adapted to
at the spark plugs 42. Of course, the precise tim
ing is adjustable in accordance with‘ usual
co-operate with acomparable contact 3| mounted
practice.
.
55
2
2,113,903
I utilize either one of the pair of interrupters
in accordance with any selected condition which
occurs in the engine to which the system pertains.
The engine is provided with a suitable generator
61, one side of which is connected to ground by a
lead 68 and the other side of which is connected
sulating pivotal joint 81 to an extension 88 on the
lever l2. When the pressure developed by the
operation of the pump 82 is below a critical value,
the bellows 84 is incapable of overcoming the
bias or urgency of the spring 11, which may be
by a lead 89 to, a. voltage cut-out ‘H of a standard
spark remains in a retarded condition.
kind.
theless, when the pump 82 is e?'ective to-raise the
The function of the cut-out is to remain
open when the generator 61 is rotating so slowly
10 as to produce only a relatively low voltage, while
the cut-out ‘H automatically closes and incorpo
rates the generator 67 in a charging circuit when
the voltage rises to and above a predetermined
value which depends upon the speed of operation
15 of the generator and correspondingly of the en
gine.
The cut-out ‘H, when closed, includes the
grounded generator in circuit by a lead ‘I2 which
adjusted or set at any desired value, and the
Never
pressure in the bellows above a predetermined
value, then such bellows is effective abruptly to 10
overcome the urgency of the spring 11 and to
move the lever I2 from its position in conjunction
with the terminal 22 into a position in conjunc
tion with the terminal 46, so that the spark is
abruptly changed at the critical pressure existing 15
in'the bellows and corresponding to a critical
speed and load of the engine, from its retarded
condition to its advanced condition.
extends to a solenoid 13 connected through a lead
The reverse action occurs when the speed of
14 to the lead 9 and thence through the ammeter
8 and battery 6 to ground. The solenoid 13 is
provided with a plunger 16 which is connected to‘
but insulated from the lever l2, and the attraction
the engine decreases below a critical point and 20
the pressure exerted upon the bellows 34 by the
of the solenoid when energized is opposed by an‘
25 insulated coil spring 11. ‘The spring normally
urges the lever [2 against the stop It and with the
interrupters 29 and Si in the ignition circuit to
produce a retarded spark. When the speed of
the engine increases su?iciently so that the volt
30 age generated by the generator 67 is ample to
close the cut-out and to put the generator in cir
cuit with the battery 6, then the solenoid ‘i3 is
simultaneously and correspondingly effective to
pull the plunger 76 into the solenoid, overcoming
35 the urgency of the spring Ti and moving the
lever I2 so that the terminal 46 is electrically con
nected with the lever and the terminal 22 is elec
trically disconnected therefrom. This action oc
curs abruptly so that the interrupter 29, 3| is
40 abruptly cut out of the circuit while the inter
rupter 53, 54 is abruptly and simultaneously in
troduced into the circuit.
from retarded condition to advanced condition
45 abruptly at the proper point in the operation of
the engine, dependent upon the speed of opera
The reverse change occurs as the
engine slows down and the voltage of the elec
tricity supplied by the generator 6'! is reduced
50 below the critical value.
Then the cut-out ‘H
opens and the solenoid 13, being therefore de
energized, permits the spring ‘H to return the
lever l2 to the position shown in Fig. 1, thereby
returning the contacts 29 and 3| to their active
condition in the circuit and removing the inter
rupters‘ 53 and 54 from actively affecting the cir
cuit. The ignition spark is then in retarded con
dition.
turned from its position in conjunction with the
terminal 46 to its position in conjunction with
the terminal 22, thereby restoring the spark from
its advanced condition to its retarded condition.
In accordance with my invention, therefore, 30
there is provided means responsive to a condition,
such as speed and load of the engine, which is
e?ective to alter the ignition spark from a re
tarded condition to an advanced condition, and
vice versa.
I claim:
35
.
1. A spark controlling mechanism comprising
an engine ignition circuit, a retarded spark cir
cuit interrupter, an advanced spark circuit in
terrupter, a switch for alternatively including
either one of said interrupters in said circuit,
and means responsive to a critical speed of said
The ignition spark timing, therefore, is altered
tion thereof.
pump 82 drops below a critical value. At such
time the urgency of the spring TI is ample to over
come‘ the counter-urgency of the bellows 84 ex
erted through the rod 86, and the lever I2 is re 25
'
As indicated in Fig. 2, there is another condi
60 tion which is responsive to engine speed and some
what to engine load, which can be utilized in place
of the electrical voltage. In this arrangement,
which in many respects is comparable with the
engine for abruptly actuating said switch to in
clude said advanced spark circuit interrupter in
said circuit and to. exclude said retarded spark 45
circuit interrupter from said circuit.
2. A spark controlling mechanism comprising
an engine ignition circuit, a ?rst circuit inter
rupter, a ?rstinduction mechanism operating in
conjunction with said ?rst'circuit interrupter, a
second circuit interrupter, a second induction 50,
mechanism inductively isolated from said ?rst
induction mechanism and operating in conjunc~
tion with said second circuit interrupter, and
means responsive to a critical speed of said en_
gine for abruptly including one of said circuit
interrupters and its associated induction mech
anism in said circuit and excludingthe other of
said circuit interrupters and itsassociated induc
tion
mechanism
therefrom.
-
"
'
.
'
>
3. A spark controlling mechanism comprising
60
an engineignition circuit; a retarded spark cir
cuitrinterrupter; a ?rst induction coil including
arrangement previously described, and in which . a primary winding, a core, anda secondary wind
65 identical reference numerals indicate identical
ing adapted to be controlled by said retarded
parts, the voltage cut-out ‘H is directly connected spark interrupter; an advanced spark circuit in
to the ammeter 8 by a lead Bl; but in order to terrupten'a second induction coilv including a
move the lever l2 there is utilized the pressure de
primary winding, acore, and a secondary Wind
veloped by a lubricating oil pump 82 which is ing adapted to be controlled by saidadvanced
70 connected to the engine to‘ which the system per
spark interrupter; a switch for alternatively in
tains and which operates in accordance with the cluding either one of said interrupters and the
load thereon.
‘
primary Winding of the associated one of said
The pump 82 is connected through a pressure
coils in said circuit and excluding the other .of
pipe 83 to an expansible bellows 84 which in turn said interrupters and the primary winding of
75 is connected by a rod 86 and an electricallyine the other ‘one of said coils fromsaid circuit, and 75
2,113,903
means responsive to the operation of the engine
to which said circuit pertains for operating said
, switch.
I
4. A spark controlling mechanism comprising
an engine ignition circuit, a retarded spark cir
cuit interrupter, a ?rst induction coil having
its primary winding connected to said retarded
spark circuit interrupter, ‘an advanced spark
circuit interrupter, a second induction coil hav
ing its primary winding connected to said ad
vanced spark circuit interrupter, a switch for
alternatively including either one of said inter
rupters and its respective induction coil in said
circuit, means for urging said switch to include
15 said retarded spark circuitinterrupter and said
‘first coil in said circuit and to exclude said ad—
vanced spark circuit interrupter and said second
coil from said circuit, and means responsive-to
an increase in the speed of operation of the
20 engine to which said circuit pertains for over
coming the urgency of said means to include said
.3
advanced spark circuit interrupter and said sec
ond coil in said circuit and to exclude said re
tarded spark circuit interrupter and said ?rst _
coil from said circuit.
v5. A spark controlling mechanism comprising
an engine ignition circuit, a retarded spark cir
cuit interrupter, an advanced spark circuit in
terrupter, a pair of inductively isolated induc
tion coil primary windings one for each of said
interrupters, a switch for alternatively including 10
either one' of said interrupters and its respec
tive primary Winding in said circuit, and means
responsive to a critical speed of said engine for
abruptly actuating said switch to include said
advanced spark circuit interrupter and its re 1.5
spective primary winding in said circuit and to
exclude said retarded spark circuit interrupter
and its respective primary winding from said
circuit.
JOHN R. RIPPE.
20
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