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Патент USA US2119672

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June 7, 1938.
R. G. FULCHE‘R ET AL
2,119,672
MEANS FOR CONTROLLING THE STARTING OF INTERNAL COMBUSTION ENGINES
Filed Feb. 4, 1937
Patented June 7, 1938
.
2,119,672
UNITED STATES PATENT OFFICE
2,119,672
MEANS FOR CONTROLLING THE STARTING
OF INTERNAL COMBUSTION ENGINES
Roy G. Fulcher and William T. Carle, Chicago,
Ill., assignors to Mary Baker Fulcher, Chicago,
111.
Application February 4, 1937, Serial No. 123,968
5 Claims.
This invention relates to improvements in
means for controlling the starting of internal
combustion engines and it consists of the matters
hereinafter described and more particularly
5 pointed out in the appended claims.
‘The means above mentioned, with which the
present invention is more particularly concerned,
is of the kind illustrated in United States Letters
Patent 1,912,669 granted to Herbert Horatio
Trail on June 6, 1933.
The means in said patent has certain objec
tions which the present invention seeks to over
come and among said objections mentioned is the
cost of the parts going thereinto, the non-posi
tiveness of starting the engine with a resulting
battery drainage, and the requirement of a con
siderable amount of switch movement in manipu—
lating the same, making it somewhat di?icult for
use by inexperienced persons with the possibility
20 of getting out of order.
Among the objects of the present invention is
to provide a means of this kind which is more
2
simple in construction and is, therefore, more
economical to produce, is more positive in its en
gine starting operations and requires less switch
movement so as to be easy to manipulate by inex
perienced persons and is not apt to get out of
The above mentioned objects of the invention,
30 as well as others, together with the advantages
thereof will more fully appear as the speci?cation
proceeds.
In the drawing:
Fig. 1 is a diagrammatic view illustrating the
35 preferred form of the invention.
Figs, 2 and 3 are diagrammatic views illustrat
ing the positions of parts of a switch forming
a part of the invention, when said switch is in the
full “on” and in the “running” positions.
4
Fig. 4 is a view illustrating a modi?ed form of
the invention.
Referring now in detail to that embodiment of
the invention illustrated in Figs. 1 to 3 inclusive
of the accompanying drawing, l0 indicates an
electric starting motor, now conventional in
automotive vehicles for starting the engines
thereof. As shown herein, the motor is provided
at one end with a hollow housing I I and one end
of the armature shaft H of said motor is jour
A portion
of the shaft within the housing is formed with
50 nalled in the end wall of the housing.
helical ribs or splines l3 and on said portion of
said shaft is mounted a pinion I4.
?nger I6 is secured along one end to the inner
surface of the housing in a manner whereby it is
insulated therefrom. The other end of said ?n
ger is so formed that when the pinion travels ax~
ially outward on the shaft, the flange l5 engages
and makes a suitable contact therewith. The
housing mentioned may be grounded as at I‘! to
any convenient part of the associated vehicle.
18 indicates an electromagnet associated with 10
the motor for controlling the passage of electric
current to the motor whereby the same is ener
gized and deenergized. As herein shown, said
magnet includes a casing l9 enclosing a coil 20
and an associated core 2| which is spring-pressed 16
in one direction. This core carries a bridge piece
22 at one end. When the coil is energized, it
causes the core to move outwardly and into en
gagement with a pair of contacts 23 and 24, se~
cured in one end of the casing, so as to electrically
connect the same together. One of said contacts
is operatively connected to a terminal post 25 of
the motor, while the other contact is arranged
to have a conductor or line attached thereto and
which will be referred to later. In the other end 25
of the casing is provided a pair of terminals 28
and 21 respectively for the coil of the electro
magnet.
order.
40
(Cl. 290-—38)
cry. A longitudinally extending spring contact
The pinion is
adapted for a rotative as well as an axial move
55 ment on the shaft l2, into and out of operative
engagement _with the ring gear on the fly wheel
of the engine (not shown) with which it is asso
ciated for starting purposes.
On the inner end of said pinion is provided a
.60 radial ?ange 15 having a smooth rounded periph
A manually operable switch 28 is associated
with the means thus far described and said switch 30
may be in the form of a key actuated ignition
lock as is now conventional in automotive vehi~
cles. As herein shown, said switch includes a
support 29 and a shaft 30 is arranged therein for
a limited turning movement. This shaft carries
a contact arm 3| electrically connected thereto
and said shaft in turn is connected by a line
32 to one side of a battery 33, the other side of
which is grounded. An arm 34 of insulation is
secured to the arm 3 I, but is arranged in opposite 40
relation thereto. A contact ?nger 35 is carried
on the free end of the insulation arm and a con
tact ?nger 36 is carried on the free end of the
arm 3|.
The switch arms are adapted for a short
turning movement clockwise from “off” through 45
the “running” position to a full “on” position,
the return to “01f” position being a counterclock
wise movement. The switch arms normally
stand in an “off” position up against a stop pin
31, a spring 3'!a holding the arm in this position. 50
A relatively long arcuate contact 38 is ?xed in
the support 29 to the right hand side of the arm
3! when in the “off” position, and a pair of
spaced spot contacts 39 and 40 respectively are
?xed in the support 29 to the left hand side of
the switch arm 34 when in said “off” position.
The contacts 39 and 40 are so arcuately spaced
and the contact 38 is of such arcuate length that
when the arms 3l—34 are in the full “on” posi
tion, the contact ?nger 35 bridges the contacts -
2
2,119,672
39 and fill and the contact ?nger 38 engages the
contact 38.
The contact 38 has a line 4! connected there
to and said line leads to the ignition system of
UK the associated engine. A line [52 is provided be~
tween the line 1i! and the terminal post 25 of the
electromagnet it. A line :13 connects the con
tact 39 with the other terminal post 2? of said
electromagnet and the spring contact ?nger iii
I4 and housing H to the ground ll. Thus, the
ignition is “on” and the motor Hi is energized
to crank and start the engine. When the engine
is running under its own power, it drives the
pinion M which moves inwardly on the helical
portion 13 of the shaft I2, thus moving the pin
ion ?ange l5 out of engagement with the ?nger
it, thus breaking the circuit for the motor‘ which
becomes deenergized and steps.
10 in the housing ! i of the motor is connected to the
In Fig. 4 we have illustrated a modi?ed form of 10
line :13 by another line 1'54. The contact all is
grounded as at 1'55. The contact 23 or" the elec~
tromagnet i3 is connected by a line 32a to the
line 32.
In the support 29 is provided a recess 46 which,
1-)
when the switch is in the “running” position,
is adapted to receive a yielding detent fill on the
the invention and wherein the closing of the igni
tion circuit and the closing of one of the ?rst
ground connections for the electromagnet I8 may
be carried out independently of each other.
Thus, the switch structure may be reduced to the 15
simplest and most economical form. As shown
in Fig. 4, the parts associated with the ignition
switch arm 3!. rI‘his detent and recess arrange
ment is such as. to hold the switch arms iii-3d
circuit are substantially the same as before and
the contacts 39 and 46 which are the same as
in “running” position against the action of the
spring 37*‘. A second stop pin 48 is provided in
the support
This pin is adapted to be en
manner.
before, are electrically connected up in the same
Instead of employing the contact ?nger 35 on
gaged by the arm
to limit the turning move
ment of said arm to the full “on” position.
The parts are shown in Fig. 1 in the “off” posi
tion. To start the associated engine, the switch
an arm 34 which is movable with the arm 3|,
we mount said ?nger on a spring pressed plunger
arms 3i and 34 are swung to the full “on” po
29EL in such a convenient location as to be op
sition shown in Fig. 2 wherein the ?nger 36 of
the arm 35 engages the contact 38 and the con
erable by the thumb of the hand turning the
switch arm 35. Said plunger also has a contact
tact ?nger 35 bridges and engages both spot
contacts 39 and 46. This connects the ignition
system with the battery 33 through the con
tact 3S, ?nger 3%, arm 3!, shaft 3i] and line 32.
Current also passes from the line 4| through line
12-2 to the terminal 26 of the electro-magnet I8,
through the coil 26, terminal 2'5, line 43, contact
tioned, when the switch arm 3| is turned to its
full “on” position to engage the contact 38, the
plunger 3551‘ may be depressed inwardly to cause
its contact piece 35“ to bridge and connect the
3:2‘, to contact fit] through the bridging contact
finger 35 to the ground 45.
This energizes the coil 2% of the magnet £8 to
.40 cause a movement of the associated core 24
whereby its bridge piece 22 engages the contacts
23 and 24. Current then passes from the battery
33, through a part of line 32 to and through
the line
the contact 23, bridge piece 22, con
tact 24 to the terminal post 25 of the starting
motor it which is thus energized.
When the motor is energized, the armature
shaft i2 is rotated and this causes the pinion
to rotate and travel outwardly on the helical
34a arranged in the support 29*”. This plunger
has a head
arranged outside of the support
piece 35‘L for engagement with the contacts 39 30
and 40.
In the operation of the structure above men
contacts 39 and 4%].
This, not only energizes the
ignition system, but it closes the circuit to the
electromagnet !8, which in turn energizes the
starting motor for engine cranking purposes. So 40
soon as the motor is energized, it establishes a
second ground for the magnet E8 to hold the
same closed, as before.
It is not necessary to retain the ground con
nection for the magnet i8 closed through the 45
contacts 39-116 and piece 35“. Therefore, so
soon as the plunger is depressed after turning
of the switch arm 3| to “on” position, the plunger
may be released and the motor it remains en
portion id of the shaft to engage the flywheel
crgized so long as the engine requires cranking.
of the associated engine so as to crank the same.
As the pinion moves outwardly on said helical
‘When the engine starts, it automatically breaks
the circuit to the motor, which stops.
portion of the shaft 62, its ?ange 95 engages the
contact ?nger it to connect it to the ground
55 I‘! through parts of the motor it].
It is apparent that when the switch 28 is in
the full “on” position as shown in Fig. 2, two
ground connections are provided for the electro
magnet it, one through the line 63, contact 39,
contact piece 35'": and contact M3 and the other
through the lines 513-4359, ?nger Iii, pinion [it
through the motor to ground 51.
After the switch 28 has been turned to its “on”
Should the motor be in operation to crank
the engine and the engine refuse to start, due to
some other faulty condition, a turning of the
switch arm 3! back to “off” position breaks the
circuit to the electromagnet it so that it breaks
the circuit for the starting motor and said motor
stops. The faulty condition of the engine may
then be recti?ed and the procedure for again
position, it may be released so that it returns to
65 the “running” position shown in Fig. 3 wherein
the detent Lil engages in the recess 48 to hold it
against the return action of the spring 373. At
this time, the contact ?nger 35 has passed ohc
the contact K38 but remains on the contact 39,
70 the contact ?nger 36 still engaging the contact
38. At this time the ignition is “on” and the
electromagnet it is still operating to hold the
motor circuit closed because the ground connec
tion for the electromagnet is still being main
75 tained through the lines @3-44, ?nger l6, pinion
starting the same is as before described. Should
the spring it get out of order so as not to func
tion as intended, this will not prevent engine
starting operations because all that it would be
necessary to do is to manually hold the switch 28 65
in the “on” position shown in Fig. 2 until the en
gine starts. When the engine has started, the
switch is released and it will then return to the
“running” position shown in Fig. 3.
With the arrangement described, a more posi 70
tive starting of the engine is assured, a less ex
pensive switch structure may be employed with
more simple wiring and the amount of movement
required for the arms 3!-3ll is reduced
While in describing our invention, we have
3
2,119,672
referred in detail to the construction, form and
arrangement of the parts involved, the same is to
be considered only in the illustrative sense, so
that we do not wish to be limited thereto except
as may be speci?cally set forth in the appended
claims.
We claim as our invention:
1. In combination with an electric starting mo
tor for an engine, an ignition circuit for said
10 engine, a circuit for said starting motor, electro
magnetic means for controlling said starting mo
tor circuit, a third circuit capable of being
grounded at a plurality of points so as to energize
said electromagnetic means, means includinga
15 plurality of contacts manually movable into and
adapted to be held in a position closing said igni
tion circuit and said third circuit respectively by
to said “running” position, said switch arm when
moved from said “on” position to the full “on”
position, engaging the ignition contact, and said
electromagnetic means contact and said ground
contact respectively to connect the latter two con
tacts in circuit to close the ignition circuit and
to ground said third circuit respectively through
one of said points and thus energize said third
circuit to cause said electromagnetic means to
close the motor circuit and energize said starting 10
motor, means actuated by said starting motor
when energized for grounding said third circuit
at another of said points, said switch arm when
released, automatically returning to said “run—
ning” position and moving out of engagement 15
with said ground contact to break the ?rst men
tioned ground connection but to hold the ignition
circuit closed, said starting motor, when driven
grounding said third circuit at one of said points
so as to energize said electromagnetic means
by the started engine operating automatically to
20 to close the circuit for the starting motor, means
break said second ground connection made there
through to open said third circuit and deenergize
actuated by said motor when energized for
grounding said third circuit at another of said
points, said contacts when said manually oper
able means is released, operating automatically
25 to break said ?rst mentioned ground connection,
but to hold the ignition circuit closed, said start
ing motor, when driven by the started engine
operating automatically to break said second
ground connection made therethrough to open
30 said third circuit and deenergize said electromag
netic means.
2. In combination with an electric starting mo
tor for an engine having an axially movable pin
ion, a circuit for said starting motor, an ignition
35 circuit for said engine, electromagnetic means
for controlling said starting motor circuit, a third
circuit capable of being grounded at a plurality
of points so as to energize said electromagnetic
means to close the starting motor circuit, vmeans
40 including a plurality of contacts manually mov
able into and adapted to be held in a position clos
ing said ignition circuit and said third circuit re
spectively by grounding said third circuit at one
of said points so as to close the circuit for the
45 starting motor, means actuated by the axially
movable pinion when the starting motor has been
energized for grounding said third circuit at an
other of said points, said contacts when said man
ually operable means is released, operating auto
50 matically to break said ?rst mentioned ground
connection, but to hold the ignition circuit closed,
said pinion, when driven by the started engine,
operating upon said means actuated thereby to
break said second ground connection made there
55 through to open said third circuit and deenergize
said electromagnetic means.
3. In combination with an electric starting mo
tor for an engine, an ignition circuit for said en
gine, a circuit for said starting motor, electro
magnetic means for controlling said starting mo
tor circuit, a third circuit capable of being
grounded at a plurality of points so as to ener
gize said electromagnetic means, to close the
starting motor circuit, a switch including an ig
65 nition circuit contact, an electromagnetic means
circuit contact and a ground contact constitut
ing one of said grounded points for said third cir
cuit, a switch arm associated with said contacts
and movable in one direction from an “off” posi
70 tion, through a “running” position to a full “on”
position and movable in the other direction back
said electromagnetic means.
4. In combination with an electric starting mo
tor for an engine, an ignition circuit for said en
gine, a circuit for the starting motor, electro 25
magnetic means for controlling said starting mo
tor circuit, a third circuit capable of being
grounded at a plurality of points so as to ener
gize said electromagnetic means, manually op
erative means for closing the ignition circuit and 30
for momentarily closing said third circuit by
grounding the same at one of said points so as
to energize said electromagnetic means to close
said starting motor circuit, said manually oper
able means being formed for operation requiring 35
closing of the ignition circuit in order to com
plete said third circuit, means actuated by said
motor when energized for grounding said third
circuit at the other of said points before said
?rst mentioned ground connection for said third 40
circuit is broken, said starting motor, when driven
by the started engine operating automatically to
break said second ground connection made
therethrough to open said third circuit and de
energize said electromagnetic means.
45
5. In combination with an electric starting mo
tor for an engine, an ignition circuit for said
engine, a circuit for said starting motor, electro
magnetic means for controlling said starting mo
tor circuit, a third circuit fed from the ignition 50
circuit and capable of being grounded at a plu
rality of points so as to energize said electromag
netic means, manually operable means for clos
ing the ignition circuit and for closing said third
circuit by grounding the same at one of said 55
points so as to energize said electromagnetic
means to close the starting motor circuit, said
manually operable means being formed for op
eration requiring closing of the ignition circuit
in order to complete said third circuit, means ac
60
tuated by said motor when energized for ground
ing said third circuit at another of said points
before said ?rst mentioned ground connection for
said third circuit is broken, said starting motor
when driven by the started engine operating au 65
tomatically to break said second ground connec
tion made therethrough to open said third circuit
and deenergize said electromagnetic means.
ROY G. FULCHER.
WILLIAM T. CARLE.
70
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