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Патент USA US2117063

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May 10; 1938.
'
c. JELLIK, JR
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2,117,063
COMBINATION SAFETY OIL GAUGE AND LIGHT SWITCH ‘
Filed May 24, 1934
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Invenlor
May 10, 1938.
‘
c. JELLIK, JR
2,117,063
COMBINATION SAFETY OIL GAUGE AND LIGHT SWITCH
Filed May 24, 1934
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3 Sheets-Sheet 2
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Inventor‘
?llorney
May 10, 1938.
c. JELLIK, JR‘
'
2,117,063
COMBINATION SAFETY OIL GAUGE AND LIGHT SWITCH
Filed May 24, 1934
‘
s Sheets-Sheet s
BREHKER
D151.’ UN I T
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-
BfaTTERY
Inventor
Patented May 10, 1938
2,117,063
UNITED STATES PATENT OFFICE
2,117,063
COMBINATION SAFETY on. GAUGE. AND
.
‘
LIGHT SWITCH
,
Charles Jellik, .n-L; st. Louis, Mo.
Application May 24, 1934, Serial‘No. 727,347
8 Claims.
(Cl.'123—‘-146.5)
Figure.13 is a wiring diagram of the embodi
My invention relates generally to instruments
aiding in the efficient and safe operation and " merit .of the invention.
maintenance of internal combustion engines, par
Referring in detail to the drawings, the numer
al 5 generally designates the embodiment of the
ticularly internal combustion engines of the sta
tionary type which are kept running for long ‘ invention which comprises a front plate or panel
periods of time, and an important object of my . 6 which is arranged to be mounted by bolts or
invention is to provide fool-proof means for screws passing through the holes 1 to the instru
grounding out the ignition circuit of the engine -' mcnt panel or other support in the operating
upon a failure of the lubrication system of the ‘ compartment of the vehicle or control board of’
the stationary internal combustion engine.
10
engine, so as to stop the engine and thereby pre
.. The numeral 8 generally designates the front
vent damage to the engine from lack of oil.
It is also an important object of my invention portion of the oil gauge mechanism which is
to provide in an arrangement of the character mounted in a suitable opening in the panel 6
indicated, especially adapted to installation on a and includes the bezel 8 engaging the front part
of the casing 9 and holding therein the glass [0.
r15 motor vehicle, means for visibly indicating a con
dition of failure of the lubricating system, and The face of the gauge is designated II, and the
control means for the ignition system, grouped hand i3 is ?xed on a pivot I2 which is journaled.
‘with and combined with means for controlling in the face H. Secured by one end to the face
the, lighting system of the vehicle, whereby the i l and by'the opposite end to the hand 13 is the
utmost convenience and safety in the operation small coiled conductive spring 14. The point of
‘grounding of the spring I4 with the face II is
and control of these elements is procured.
Other objects and advantages of my invention indicated by the numeral Hi. It is to be observed
will be apparent from a reading of the following that the spring I4 has no operative function as
description in connection with the drawings, far as the hand [3 or the shaft I2 is concerned,
25 wherein for purposes of illustration I have shown but is used to make a perfect electrical connec-‘
tion between the hand and the face and hence to
a preferred embodiment of my invention.
ground, which would not exist if reliance for a
In the drawings:—- ,
Figure 1 is an elevational view of the front of good electrical connection between these parts
was placed alone on the contact between the mov
an embodiment of the invention.
Figure 2 is an elevational view of the back of ing parts. The contact point I9 is ?xed on the
front end’ of one arm of a right-angle shaped
Figure 1.
~
‘
Figure 3 is an elevational View of the front of member 20'» mounted on the back of the face and
the dielectric panel.
Figure 4 is a longitudinal sectional elevational
35 view of the bright-dim switch arm.
Figure 5 is an elevational view of the back of
the switch mechanism showing the positions of
the parts while the key is in the “off” position.
Figure 6 is a vertical transverse sectional view
through the right hand side of Figure 5 disclos
ing the position of the parts of the switch mech
anism while the key is in the “off” position.
Figure 7 is a transverse vertical sectional view
through the oil gauge portion of the device.
45
Figure 8 is an elevational view of the back of
the oil gauge mechanism showing the casing
thereof removed.
Figure 9 is a longitudinal vertical sectional
view through the oil connection nipple.
50
Figure 10 is an elevational View of the front of
having the ' said
one arm passing
forwardly
through the face II. The remaining arm of the
member‘ 20' has connected thereto the wire 2|.‘ 35
The member 20' is insulated from and mounted
to back of the face II by screws l8’ which enter
the front of face Ti and screw into insulated
block IS’.
The grounded hand l3 has a lateral arm. I‘!
which has a contact point “3 arranged to engage
the insulated contact point l9 mounted on the
‘face II, when the hand I3 is in the extreme left
hand position, indicating failure of the lubrica
tion system. > The engagement of the contacts l8
and I9 brings into the ignition circuit of the in
ternal combustion engine a grounded resistance
sufficient to incapacitate the ignition system and.
thereby cause stopping and prevent further oper
ation of the engine under certain conditions.
The cylindrical casing of the oil gauge mecha
the cam member.
‘
Figure 11 is an elevational view of the back end nism is generally designated I5 and through a
hole in the back thereof shown in Figure 2 the
of the switch mounting.
V
Figure 12 is an elevational View of the side of a wire 21 is led from the insulated contact point
I9 to the binding, post 22 of the resistance coil 55
key for operating the switch mechanism.
2,117,063
25 which is mounted on the side of the switch . edge and vertically aligned on the switch panel
mechanism casing as shown in Figure 2. The
5| are in order, downwardly, the headlight dim
upper binding post 23 of the resistance coil is
connected by the wire 24 to the binding post 25
on the switch panel 5|. The purpose of the coil
26 is to absorb electric current and thereby elimi
nate heating of the grounding out circuit con
contact 54, the bright contact 55 and the light
tilting switch contacts 56 and 51. To the left of
these contacts and in a central portion of the
panel 5! and concentric to the boss 52’ are the
fuse contact points 59, 63 adapted to be engaged
tacts I8 and is during a period of oiling system
failure. The switch mechanism casing is gener
battery contact BI is connected by a connecting
ally designated 50.
1
g
_
The face I I has integral therewith the J-shaped
portion comprising the foot part 26 and the ver
tical part 21 which is substantially parallel to the
face. Between the face and the vertical part 21
15 the rock shaft 28 is journaled and is supported
in holes in the parts mentioned and has ?xed
thereto the depending toothed segment or sector
29 which is arranged to be in mesh with the
pinion 39 ?xed on the oil gauge hand shaft I 2.
20
Screws 3! passing through the back ‘of the cas
ing i5 enter the opposite wings or ?anges of the
oil connection nipple 32 which have the threaded
holes 35, 36, so that the said wings are mounted
to the inner side of the back of the 011 gauge
25 mechanism casing as shown in Figure '7, and the
_ nipple 32 is mounted through a suitable opening
in the back of the casing l5 so ‘as to project for
wardly therein and engage the back of the face
I! to which it is secured by suitable bolts or
30 screws 31 as shown in Figure 7. The nipple 32
is connected to the oil pipe which is used as the
‘electrical ground.
The oil pipe connecting nipple has the threaded
portion 38 projecting from the back ‘of the "cas
35 ing for connection with the oil pipe (not shown)
and has the bore 40 whose forward end vtermi
nates in a tapered converging portion 4| which
‘leads into a small ori?ce 42 registered with a
corresponding hole in the edge or side of the
4.0 rectangular cross section oil pressure tube 43
which is positioned in the slot v44 in the outward
end of the nipple, as shown in Figure 9. The ‘oil
pressure tube 33 is arranged as shown in Figure 8
and extends for approximately two-thirds of a
45 complete convolution and has connected to its
lower end v45 the spring ‘wire portion ‘46 which
has a vertical arm 41 having a lateral pivot en
tering a pivot hole 41’ in the right hand end of
‘the sector 29 as shown in Figure 8, whereby upon
50 expansion and contraction of ‘the tube 43 in re
sponse to the oil pressure in the lubrication sys
tem, the sector ~29 will be rocked, and correspond
ingly rock the indicating hand l3.
The ‘switch panel 5| of the switch mechanism
55 ‘50 has a number of contacts arranged thereon
to bring the fuse 68 into the light circuits.
The
strip 62 to the fuse contact 63 above it. The light 10
tilting contacts ‘56, 51 are similarly connected to
the head lamp contacts 54 by the V-shaped strip
65 shown in Figure 2. The cowl or dim lamp
vcontact 63 is similarly connected by a connector
'67 to the lamp contact 68. The tail lamp con 15
tacts 69, 10 are similarly connected by a connect
ing strip ‘H’. The battery contact 6| and the
ignition contact ‘H are radially spaced from the
axis of the switch rotor which corresponds to
the position of the boss 52’. It will be observed 20
that the contacts 58, 59 and 69, ‘H1 and 66, B4 are
grouped around the boss 52’ and are concentric
therewith and that the contacts 6| and ‘H are
arranged radially inwardly of the described con
tacts and are also concentric to the boss 52’. It
will be observed that the contacts 52 and 53 are
to be bridged by a safety push button operated
‘circuit closing and opening member to be de
scribed, so that the ignition circuit may be closed
and normally maintained closed.
The safety push button 73 is mounted slidably
in a borein the upper part of the panel 6 and
has a slightly reduced portion 14 on which is cir
cu-mposed the outwardly pressing helical spring
1-’! which engages the shoulder de?ned by the" 35
outer portion of the safety push button and the
back end of the bore in which the button works.
The shoulder de?ned by the inner end of this
bore is generally designated 18. A reduced por
tion 79 of the inner end of this bore has extend 40
ing therein the reduced rod portion 80 of the
safety push button which extends through a hori
zontal notchin a plate 88 which is ?xed to the
back of the panel and surrounds the inner end
'of the reduced portion of the bore as shown in 45
Figure 6.
A head 8! is ?xed on the reduced por
tion 80 and is arranged to engage the back face
of the plate 88 when the button is in the open
position in which it is shown in Figure 6, and
this head '8'! is cooperated with by the extremity
of the arm 85 of the Y-shaped spring pressed
latch ‘which is pivoted as indicated at 84 to the
back of the plate 88. A lateral rearwardly ex
tending ‘portion ‘on ‘the arm 85 is adapted to move
in front of the head 8| as soon as the head 8| -
foricontact by the switch mechanism to be de
has been moved rearwardly in pushing in the
scribed and ‘these, ‘and their.connection with each
other and with the ignition system of the internal
button 73, the spring 81 stretched between the
combustion engine, are as follows:—
The contact 52 ‘corresponds 'to the binding post
25 with which the upper end of the resistance coil
20 is connected, and the contact '53 which is in a
horizontal plane ‘with the ‘contact 52 is connected
to the distributor casing side ‘of the ignition coil
65 of the engine as shown in Figure 13. It is obvi
ous that when the switch points 52, 53 are bridged
by the switch mechanism and the oil gauge con
tacts 13 and I9 are engaged, during the failure of
the lubrication system of the engine, that the
70 resistance coil 23 will be ‘grounded and in circuit
with the ignition 'coil and ground ‘the same to
such an extent that the ‘engine will ‘be ‘stopped
and will not start again under any'circum's'tances
until the grounded resistance has been taken out
75 of the ignition coil circuit. ‘Along the right hand
point '88 on the plate and the point 83 of the
~la1tch'acting to swing the arm 85 of the latch in
front'of the ‘heads! as soon as the head has been 60
moved ‘rearwardly sufficiently.
A rearwardly ex
tending foot 83 on ‘the remaining arm of the Y—
shaped latch is arranged for cooperation with the
The purpose of the cam
90 'is 'to push upwardly on the portion 86 of the 65
Y-shaped latch at a certain phase in the opera
lobe "89 of the cam 33.
tion of the switch mechanism so as to withdraw
the portion '85 from in front of the head 8| and
thereby permit the spring TI to push the button
7 3 outwardly or forwardly.
The dielectric disk I03 and the cam '90 are con
nected to rotate together and the cam has mount
ed to the forward face thereof the cylindrical
=stub=shaft 1'00 which is rotatably mounted in the
bore 99 of a thickened portion 9] of the panel 6,
70
2,117,063
and the front of the cam 90 has therein a plu
rotated either to the right or to the left.
rality of depressions‘or holes I04’ with which
engages selectively a spring pressed ball detent
key will not operate the cam rotor assembly if
the key is not ?rst pushed in all of the wayin
I04 operatively mounted in the back of the por
tion 9| as shown in Figure 6. A stop ?nger 9|’
on the lower part of the cam 00 is arranged to
work in a semi-circular groove I05’ formed in
the back face of the portion 9| whereby rotation
the manner described. The key looks or stays
in when pushed in and turned toward the right
or running side but fails to lock in when pushed
The
mally vertical slot I02 withwhich the key 95
in and turned toward the parking or left side.
The position of the cam while the key is in the
“off” position is shown in Figures 5 and 6 where
in the cam ,iiil is‘holding the Y-shaped latch~
out of engagement with the head 8| of the push
is arranged to cooperate,
button rod.
of the cam in both directions is limited. The
forward end of the stub-shaft I00 has the nor
‘
,
Holes I06’ at circumferentially‘spaced intervals
in the cam 90 and in the dielectric disk E63
15 which is mounted on the back of the cam slid
ably receive rods I06 which have ,‘circurnposed
thereon springs It'll working between the dielec
‘
Upon proper manipulation of the key 55 so
,a's'to rotate the rotor assembly to the right at
‘ least as far as the ?rst step, the engine ignition‘. 15
will‘ be on ‘and the cam will have receded from
under portion '86 of the latch and have permitted
tric disk E03 and the front face of the light i the spring 8'! of the Y-shaped latch to bring
contact ring I 05. Heads I08 on the back end the portion 05 of the latch out of a position in
20 of the rods lElSretain the contact ring I05 in
engagement with the. periphery of the head 0h 20
place and act as contacts to engage the related
It is obvious that in this position of the latch
contacts on the plate 5|. These heads I98 are, the push button '13 may be pushed inwardly or
also riveted against the front face of the corn
rearwardly against the tension of its spring ‘El’
tact ring Hi5 so that the contact ring is ?xed and that as soon as the head 3i moves rear
25 on the rods I08 and will move the rods forwardly
wardly su?lciently the portion 85 of the latch 25
into the holes 136' on the disk 5&3 as the disk
will dropin front of the head 8i and hold the
I03 is moved forwardly against the tension of
the springs l?'l.
A spring material segmental ignition contact
30 frame I59 has its top ?xedly mounted to the
upper part of the disk I03 by a copper rivet H6
and has its lower part slanting rearwardly and
downwardly as indicated in Figure 6 and is pro
vided at each side with a rod E09’ whose con~
tact head is riveted to the frame I539. The rods
I093’ are slidable in receiving openings in the
disk I03 and have circumposed thereon springs
I01 which expand between the back of the disk
I63 and the front face of the frame E09. The
40 heads of the rods I 09’ are arranged to engage
the related contacts of the plate 5i.
It will be obvious that when the stub-shaft
I00 is rotated it will rotate not only the disk
Hi3 and the cam 90 but also the contact ring
Hi5 and the contact frame I89 relative .to the
stationary contacts which are concentrically
grouped around the boss 52’. Projecting rear
Wardly from the center of the disk 5&3 is the
head of its mounting rivet which is rotatably
received in the hole in the front end of the boss
52' which is set in the panel 5i to support the
cam rotor.
Means for controllably rotating the cam rotor
and selectively contacting different ones of the
concentrically grouped stationary contacts com
prises the barrel 92 which is mounted in the
front part of the bore 99 and contains the helical
spring 93. The end of the barrel is provided
with a slot I 00' and its forward end with an
60 opening suitable to receive the key 95. A washer
98 having a key receiving slot 95, is arranged
safety push button in the inward position in
which its contact ring 81' will be engaged with
and bridge the contacts 52 and 53 and thereby
close the resistance circuit.
The contact ring ‘
8'!’ is mounted on and is carried by the dielec
tric disk 12 which slides on the inward end or
back end of the rod 80 and is held in the rear
ward position by the spring 82 which is circumposed on the rod 89 between the dielectric disk
12 and the head 8!. Bridging of the contacts
52 and 53 by the safety push button contact
ring conditions the introduction into the ignition
circuit of the resistance coil 20 during engage
ment of the oil gauge hand contact I8 with the .40
oil gauge contact I9. Therefore, in order to
condition operation of the safety ignition circuit
grounding contemplated by the invention, it is
necessary that the safety push button 73 be
pushed in after the engine has been started, after '
proper operation of the cam rotor by manipula
tion of the key. When the safety push button
i3 is pushed in with the motor running, it will
be held in by the latch for the reasons and by
the means described. Should the ignition be
turned off by operating the key 95 toward the
left, the cam will operate the latch so as to re
lease the safety push button it outwardly and
throw the oil pressure controlled ignition circuit
grounding arrangement out of circuit.
Mounted on a pivot H4’ ?xedon the right
hand wall of the casing of the switch mechanism
and pivoted thereon is the bright-dim switch
operating arm H2 which has the handle H3
provided with the hole I I4 receiving the pivot‘
H4’.
A reduced portion H5 at the rear end of
to have its front face engaged. as the key 95
is inserted, by the shoulder 97 on the key and
to be pushed inwardly or rearwardly against
the tension of the spring 93, when the key is
pushed part way into the key barrel for the
purpose of engaging the portion I80’ and 99'
the handle I I3 has circumposed thereon the yoke
tensioning spring H9. A further reduced flat
portion H6 has mounted thereon the yoke com-
of the key with the central opening IEEI’, and
appropriate contacts for engaging the selected
ones of the bright and dim contacts 54, 55 and
56 and 5?. The spring I I9 keeps the yoke pressed 70
against the selected pair of contacts, such as the
contacts 54 and 56 or the contacts 55 and 5?,
the yoke being slidable upon the reduced ?at
portion H6. It is obvious‘that ‘by tilting the
with the slot I02 in the forward end of the stub
70 shaft tilt‘ the key will not rotate. But when
the key is pushed farther inwardly, the notches
96 of the key will enter the slot E00’ in the rear
end of the barrel 92, whereat the key will be
free to rotate. If the key be rotated while in
this position, the cam rotor assembly will be
posed of the divergent arms II 1 and. H8 which ‘
are insulated from the spring I I9 and the handle
lit by the dielectric block IlB’.. The arms have
handle I I3 which projects through the opening
2,117,063
' 4
l20 in the right hand side of the panel 6 that
the lights of the vehicle may be changed from
bright to dim and vice versa at a touch of a
connected to a different portion of said ignition
system and its remaining side connected to the
battery of the ignition system, whereby upon
?nger providing the switch key 95 has been . closing of said switches during a closed condition
of said contacts said ignition system will be de
turned to the bright position on either the run
ning side or the parking side.
In using the device of the invention, the opera
tor places the
after pressing
10 the key either
operator turn
switch key 95 in the slot 94 and
it inwardly all of the way turns
to the left or to the right. If the
the key to the left the only cir
cuits closed as a result are the dim or cowl and
the bright tilting light circuits used for parking.
If the operator turn the key toward the right
15 instead, the ?rst step closes the ignition circuit
and conditions the locking of the safety push
button, and the second and third steps maintain
the ignition circuit and bring into play also the
bright, tilting, and the dim or cowl running light
20 circuits of the vehicle, which bright light circuit
may be controlled further by manipulation of the
bright-dim switch handle I [3 in a manner already
‘indicated.
As soon as the ignition circuit has been closed
25 by turning the key to the right from the o?
position and the motor has been started, the
safety push button 13 is pushed in so as to condi
tion the bringing into the ignition circuit of the
grounding resistance coil 20 whenever the hand
30 of the oil gauge should sink under a reduced oil
pressure or failure of the lubrication system to
the left hand extreme position in which it en
gages its contact with the contact 19. It is not
necessary to push the safety push button 13 in to
35 .operate the vehicle, but it is necessary to push
in the safety push button 13 at the time indicated
if the automatic control of the ignition circuit
by the oil pressure of the lubricating system is to
be placed in condition for operation.
40
Should a failure of the lubricating system occur
while the safety push button 13 is in the pushed
in position and the motor should stop, the igni
tion key 95 may be turned oif, whereupon the
safety push button 13 will spring outwardly and
45 break the grounded resistance circuit. The igni
tion key may then be turned to the right and
the motor started again, to enable the operator
energized, said switches including, a rotary mem
ber selectively engageable with said contacts, key
means for operating said rotary member, a safety
push button operable to bridge some of said con-,
tacts while others of said contacts are engaged by
said rotary member, cam operated means for
locking said safety push button in the engaged
position, cam means on said rotary member for
operating said cam operated means to release said
safety push button from engaged position.
automobile engine ignition system inoperative
upon a failure of the oil pressure in the engine,
said device comprising a member responsive to
the oil pressure and having a contact adapted to' 20
be connected to said ignition system, said device
further comprising a stationary contact engage
able by said contact only when the oil pressure
fails, an ignition system grounding resistance,
connected to said stationary contact and to a 25
part of the ignition system, a safety switch hav
ing means to which said resistance is connected,
said safety switch being interposed between said
ignition system and said resistance, said means
being adjustable to condition a connected condi 30
tion of said resistance with respect to the igni
tion system, upon engagement of said contact
with said stationary contact upon failure of the
oil pressure, whereby said resistance is connected
to said ignition system so as to render the same 35
inoperative.
3. In combination, a visible safety oil pressure
gauge switch, said switch comprising an oil pres
sure responsive member, a contact carried there
by, a stationary contact supported to be engaged 40
by the ?rst-mentioned contact in a position of said
responsive member corresponding to a lack of oil
pressure, said first mentioned contact being ar
ranged to be disengaged from said stationary
contact in another position of said pressure re 45
sponsive member when the oil pressure is normal,
a grounding resistance coil having one end con
to bring the vehicle to the side of the road or
park the same to make repairs or inspection. If
upon starting an engine the second time the hand
of the oil gauge does not move toward the right,
nected to said stationary contact, a cooperating
safety push button switch to one side of which
the remaining side of said coil is connected, said 50
this is an indication of lubricating system failure,
and the operator may conduct himself accord
side arranged for connection to the circuit breaker
side of the ignition coil of an ignition system,
whereby, with said safety push button switch in
closed position, and during a closed condition of 55
ingly.
safety push button switch having its remaining
Although I have shown and described herein a
preferred. embodiment of my invention, it is to ' said contacts, said ignition system is inoperative.
4. A device for rendering an ignition circuit
be de?nitely'understood that I do not desire to
limit the application of the invention thereto, inoperative upon failure of oil pressure in an in
ternal combustion engine, said ignition circuit
and any change or changes may be made in mate
so rials and in the structure and arrangement of involving an ignition coil having a circuit breaker
parts, within the spirit of the invention and the terminal, said device comprising a contact mov
able responsive to the oil pressure and arranged
scope of the subjoined claims.
to occupy a ?rst position while the oil pressure
What is claimed is:—
1. In a device of the character described, an is at normal and a second position while the oil
pressure is below normal, a stationary contact
65 oil pressure responsive member, a contact car
ried thereby, a stationary contact supported to with which said responsive contact is engageable
be engaged by said contact in a position of said only in the second position thereof, a resistance
responsive member corresponding to a lack of oil arranged to be interposed between one of said
contacts and the circuit breaker terminal of the
pressure, said contact being arranged to be dis
70 engaged from said stationary contact in another ignition coil, an ignition switch including a cam,
position of said pressure responsive member when a safety push button switch, cam operated latch
the oil pressure is normal, and ?rst switch means means on said safety switch operatively engage
able by said cam for locking and releasing said
having one side connected with one of said con
tacts and its opposite side to a portion of said push button switch according to Whether the
75 ignition system, a second switch having one side ignition switch is in an “off” or an “on” position,
55
15
2. A device for rendering a battery equipped
60
65
70
75
2,117,063
said push button switch being interposed between
said resistance and the ignition switch, said push
button switch conditioning flow of current
through said resistance only while said push but
ton switch is in an operated locked position.
5. A device for rendering the ignition coil of
an ignition system inoperative upon failure of
the oil pressure in an internal combustion engine,
said ignition system involving a circuit breaker
10 terminal and a battery, said device comprising
an ignition switch interposed between one side
of the battery and one side of said ignition coil,
a second switch operated by the oil pressure and
arranged to occupy an open position while the
pressure is at normal and a closed position when
the oil pressure falls below normal, said second
switch being connected between said circuit
breaker terminal and another side of said ig
In
nition coil, a third and manually operable safety
switch, said safety switch being arranged to be
operable closed only while said ignition switch is
closed, a resistance interposed between said sec
ond switch and said safety switch and arranged
to incapacitate said ignition coil only while said
25 ignition switch, said safety switch and said sec
ond switch are in their closed positions.
6. A device for deenergizing the ignition coil
of a battery equipped ignition system of an in
ternal combustion engine upon failure of the oil
30 pressure in said internal combustion engine, said
ignition coil involving a circuit breaker terminal,
said device comprising an ignition switch inter
posed between one side of said battery and the
remaining terminal of said ignition coil, a sec
ond switch operated by the oil pressure and. ar
ranged to occupy an open position while the pres
sure is at normal and a closed position when the
oil pressure falls below normal, said second switch
being interposed between said circuit breaker
40 terminal and the remaining side of said battery,
a third and manually operable safetyswitch, said
safety switch being arranged to be operable
closed only while said ignition switch is closed,
a resistance interposed between said second
switch and said circuit breaker terminal and ar
ranged to deenergize said ignition coil only while
said ignition switch, said safety switch and said
second switch are in their closed positions, said
ignition switch including latch means engage
able with said safety switch while said safety
5
switch is closed to hold said safety switch closed
while said ignition switch is closed, said latch
means being disengaged from said safety switch
while said safety switch is open.
7. A device for rendering an ignition circuit
inoperative upon failure of oil pressure in an in
ternal combustion engine, said ignition circuit
involving an ignition coil having a circuit breaker
terminal, said device comprising a grounded con
tact movable responsive to the oil pressure and
arranged to occupy a ?rst position while the oil
pressure is at normal and a second position while
the oil pressure is nil, a stationary contact with
which said responsive contact is engageable only
in the second position thereof, a resistance ar 15
ranged to be interposed between one of said con
tacts and the circuit breaker terminal of the ig
nition coil, an ignition switch including a cam,
a safety push button switch, cam operated latch
means on said safety switch operatively engage
able by said cam for locking and releasing said
push button switch according to whether the
ignition switch is in an “off” or an “on” position,
said push button switch being interposed between
said resistance and said ignition coil, said push 25
button switch conditioning ?ow of current
through said resistance only while said push but
ton switch is in an operated locked position.
8. A device for rendering the ignition coil of an
ignition system, inoperative upon failure of the oil 30
pressure in an internal combustion engine, said
ignition coil involving a circuit breaker terminal,
said device comprising an ignition switch con
nectible in said system, a second grounding
switch operated by the oil pressure and arranged
to occupy an open position while the pressure is
at normal and a closed position when the oil
pressure fails, said second switch being interposed
between a grounded circular spring, and a third
manually operable safety switch, said safety
switch being further connected to said circuit
breaker terminal of the ignition coil, said safety
switch being arranged to be operable to a closed
position only while said ignition switch is in a.
closed position, a resistance interposed between 45
said second switch and said safety switch and
arranged to incapacitate said ignition coil only
while said ignition switch, said safety switch and
said second switch are in their closed positions.
CHARLES JELLIK, JR. 50
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