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Патент USA US3027499

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March 27, 1962
3,027,489
E. s. MARDEN
TIMING LIGHT CIRCUIT
Filed March 29, 1956
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ERWIN s. MARDEN
ATTORNEYS
United States
7 . "me
3,027,489
Patented-1M”. 27,1952
2
The circuit interrupting means is of thesynchronous or
‘3,027,489
'
rectifying type whereby the circuit interrupted, through
TFMINGLIGHT'CIRCUIT
the, primary winding 14 is concomitant with an interrupted
circuit in the secondary/winding 16 to, producera ‘high
‘Erwin S. Marden, Neiilsville, Wis, assignor to Auto-Test,
Incorporated‘, Chicago, 111., agcorporation of -Illinois
voltage DC. output.
. , Filed Mar. 29, 1956, Ser. No. 574,776
The vibrating armature 17 is connected by .a lead 32
to one end of the secondary winding 16. ,The vibrating
7 Claims. (61. 315-566)
This invention relates generally to devices for observ
member 17 is connected topinterrupt' a-circuit. through
the secondary winding 16, and to this, end, the other, end
of the secondary winding 16 is connectedin .a circuit with
ing the timing of spark ignition engines, and particularly
to an improved device operable from one of a plurality
of voltage sources.
a lead 33 and a contact 34 of an armature .36, of the, relay
It is a principal object of the invention to provide an
28, and a lead 37 connected between. capacitors 38‘ and
improved engine timing tester operable from one of a
39, capacitor 38 being connected by‘a lead v41 to.» a'con
plurality of voltage sources.
tact 42 at vibrating member 17, and; capacitor 39-being
A further object is to provide an improved timing 15 connected by a lead 43 to a contact'4'4 at vibrating mem
light operable from one of a plurality of voltage sources
ber 17. The balance of the interrupting circuit in the
.and characterized by the use of extremely simple switch
secondary winding 16 includes the vibrating. member 17,
ing arrangements for providing a voltage suitable for
contacts 18 or 22 and the. primary winding 14, and thence
operatinga gas ?lled ?ash tube.
to the other power lead 12.
Other objects and important features of the invention
A buffer capacitor 46 is, connected across the secondary
will be apparent from a study of the speci?cation follow
winding 16.
ing taken with the drawing, which together describe and
As has been explained, the relay. armature 36 is in
illustrate a preferred embodiment of the invention and
position corresponding to a lower known. D.C...voltage
what is now considered to be the best mode of practicing
being applied across power leads Hand 12,; and ‘in the
the principles thereof. Other embodiments may be sug 25 position shown gives a desired ampli?ed voltage across
gested to those having the bene?t of the teachings herein,
and such other embodiments are intended to be reserved
the secondary winding 16 in accordance withthe .turns
ratio between theprimary and secondary-‘windings of
especially as they fall within the scope ‘and spirit of the
transformer 13.
subjoined claims.
-
In the position shown of the relayxarmature 36, the
The drawing shows a circuit for an improved timing 30 interrupted voltage across the secondary winding 16"causes
each capacitor 38» and 39.to be charged at the-voltage
developed across the secondary-winding 16.‘ The;two
.light ‘having the improvements according to the present
invention. embodied therein.
Referring now to the drawing, there is shown a pair
capacitors 38 and 39 are connected in parallel with a
capacitor 47, which has avoltage thereacrossi'whichis a ~
_ ' of power leads 11 and 12 connected to one of two known
1 DC. voltage sources.
For example, one such source 35 sum of the voltages across capacitors 38, and 39.
may be of six volts, while the other may be of twelve
volts, both such values being commonly used in pas
' The energy stored in capacitor 47 is availablev i-for
, rapid discharge between electrodes 48 and 49 of agaseous
. senger automobiles.- Other difierent and known voltage
v.sources are intended for use with the apparatus disclosed
discharge tube 51. However, tube 51 will not discharge
‘without the triggering impulse from a. suitably; disposed
40 element 52 connectedby a lead 53 to a sparkplug "54.
‘herein.
. >Means are provided for interrupting a circuit including
_ the power leads 11 and 12, such a circuit including a trans
Under conditions when the power leads 11 and ill-are
~ connected to the higher of the two known voltagesources,
former 13 vhaving a center-tapped primary 14 and a
the armature 36 will be moved from thecontact 34-10 a
secondary winding 16. The circuitinterrupting means
position against a contact '56 connected in a,1ead,57_ con
comprises a vibrating member 17 connected to the power 45 nected at point intermediate the ends of theisecondary
lead 11 and cooperating with a ?xed contact 18 con
winding 16, so as to utilize buta portion-of the secondary
nected by a‘lead 19 to one end of the center-tapped pri
winding 16, and to develop a secondary ,voltageicorre
sponding to-that developed when thelower ‘of the two
l~ mary winding 14, the circuit being completed through
: one-half the primary winding 14 by a lead 21 connected
50
1 to power lead, 12.
The vibrating member 17 also cooperates with a ?xed
contact 22;connected bya lead 23 to theother end of
‘the center tapped primary 14, the circuit being‘ com
voltages is employed.
‘
_
In cases where the higher. voltage is twice the‘ lower,
one-half of the secondary. winding is connected when the
relay moves armature 36 from position at contact34 to
, .position at contact 56.
1 Npletedthrough one-half the primary winding 14 by the
It will be observed that the circuit according?tov the
55
lead 21 to the‘ power lead 12.
presentinvention employs a simple transformer having a
‘ Power for driving the vibrating member 17 is derived
single primary whichis connected across the twoknown
:.;from- a driving coil 24 connected in a lead 26 branching
voltage sources, anda single secondary which, is tapped
-from.power lead 11, and connected in a circuit including
at an appropriate point so‘t'hat the voltage-developed in
an armature 27 of a relay 23, the circuit being completed '
the secondary circuit is the same, if desired, asunder
'_ past a contact 25 thereof and through a lead 28a, the 60 the conditioncwhen the entire circuit is connected across
" Winding 14 and the lead 21 to the'other power lead 12. ' the lower known DC. voltage.
'The relay winding 28 is connected in- series with leads
30 and 31 branching respectively from the power leads
1'1: and 12.
t
The same relay controlling the tappingof theI second
ary also causes suitable resistance to be inserted‘ inwseries
,
' .with the. driving coil for‘theinterrupting means for the
In the position shown of the» armature 27, the relay (55 primary circuit when the higher voltage is employed, so
28 is energized at the lower of the known D.C. voltages.
as to protect the driving coil.
'
7
However, when energized at the higher of said voltages,
While the invention has ,beenldescribed ineterrns ‘of a
the armature 27 moves from its contact 25 to open the
circuit thereat, but the ‘driying coil 24 continues to be
'
energized, a, dropping resistor 29 connected in'series
wlthe'rewith being‘ providedto protect said-driving coil.
preferred embodiment thereof,_its scope is. intended to
70 be limited only by the claims here appended. ‘
I claimas my invention: '
V
"
’
l. A timing light circuit for producing a timed visible
3,027,489
4
impulse operable from'one of two known voltage sources
voltage source is‘at the said one value, said circuit in
comprising a transformer having a single center tapped
cluding a resistance in series with said operating coil when '
primary winding and a single center tapped secondary
said voltage is at said second value, said interrupter means
winding, means for forming a circuit including the
including further contacts interrupted thereby in circuit
primary winding of said transformer and either of said 5 with said secondary winding, said circuit controlling
voltage sources, means for interrupting said circuit in
means being operable in the said one position to connect
cluding a vibrating member and contacts interrupted
said secondary winding in circuit with the said further
thereby connected in said circuit, an operating coil for
contacts of said interrupting means and being operable
said interrupter means for actuating said vibrating mem
in the second position thereof to connect a portion only
ber, relay means connected to said voltage source and
of said secondary winding in circuit with the said further
. having circuit controlling means operable to one position
contacts, and condenser means connected in circuit with
when said voltage source is of one value and operable
to a second position when said voltage source is at a
said secondary Winding and said further contacts for
charging said condenser means.
second value, a circuit including said operating coil when
4. A timing light circuit for producing a timed visible
said voltage source is at the said one value, said circuit
including a resistance in series with said operating coil
impulse operable from one of two known voltage sources
comprising a transformer having a single center tapped
when said voltage is at said second value, said interrupter
primary winding and a single center tapped secondary
means including further contacts interrupted thereby in
winding, means for forming a circuit including the prim~
circuit with said secondary winding, said circuit control
ary winding of said transformer and either of said voltage
ling means being operable in the said one position to 20 sources, means for interrupting said circuit including a»
connectsaid secondary winding in circuit with the said
vibrating member and contacts interrupted thereby con-1
further contacts‘ of said interrupting means and being
operable in the second position thereof to connect a por
nected in said circuit, an operating coil for said inter“
rupter means for actuating said vibrating member, means‘
tion only of said secondary winding in circuit with the
connected to said voltage source and having circuit cone
said further contacts, condenser means connected in cir 25 trolling means operable to one position when said voltage‘v
cuit with said secondary winding and said further contacts
for charging said condenser means, gas ?lled light means
having a pair of electrodes connected to said condenser
means, and a trigger electrode to control said timed visible
impulse.‘
source is of one value and operable to a second posi
tion when said voltage source is at the said second value,
said circuit including a resistance in series with said op
erating coil when said voltage is at said second value, said
30 interrupter means including further contacts interrupted
2, A timing light circuit forproducing a timed visible
thereby in circuit with said secondary winding, said cir
cuit controlling means being operable in the said one
position to connect said secondary winding in circuit with
primary Winding and a single center tapped secondary
the said further contacts of said interrupting means and
winding, means for forming a circuit including the pri 35 being operable in the second position thereof to connect
a portion only of said secondary winding in circuit with
mary winding of said transformer and either of said volt
the said further contacts.
\
age sources, means for interrupting said circuit including
5. A timing light circuit for producing a timed visible
a vibrating member and contacts interrupted thereby con
impulse operable from one of two known voltage sources
nected in said circuit, an operating coil for said interrupter
comprising a transformer having a single center tapped
means for actuating said vibrating member, means con
primary winding and a single center tapped secondary '
nected to said voltage source and having circuit control
winding, means for forming a circuit'including the pri
ling means operable to one position when said voltage
mary winding of said transformer and either of said volt
source is of one value and operable to a second position
age sources, means for interrupting said circuit including
when said voltage source is at a second value, a circuit
a vibrating member and contacts interrupted thereby con
including said operating coil when said voltage source is
nected in said circuit, an operating coil for said interrupter
at the said one value, said circuit including a resistance in
means for actuating said vibrating member, a circuit in
series with said operating coil when said voltage is at
cluding circuit controlling means including said operat
said second value, said interrupter means including further
ing coil when said voltage source is at the said one value,
contacts interrupted thereby in circuit with said second
said circuit including a resistance in series with said op
ary winding, said circuit controlling means being operable
erating coil when said voltage is at said second value, _
in the said one position to connect said secondary winding
said interrupter means including further contacts inter
in circuit with the said further contacts of said interrupt
impulse operable from one of two known voltage sources
comprising a transformer having a single center tapped
ing means and being operable in the second position
rupted thereby in circuit with said secondary Winding,
electrodes connected to said condenser means.
the said further contacts.
said circuit controlling means being operable in one posi
thereof to connect a portion only of said secondary
‘winding in circuit with the said further contacts, con 55 tion to connect said second winding in circuit with the
said further contacts of said interrupting means and be
denser means connected in circuit with said secondary
ing operable in the second position thereof to connect
Winding and said further contacts for charging said con
a portion only of said secondary winding in circuit with
denser means, and gas ?lled light means having a pair of
3. A timing light circuit for producing a timed visible 60
impulse operable from one of two known voltage sources
comprising a transformer having a single center tapped
primary winding and a single center tapped secondary
winding, means for forming a circuit including the pri
mary winding of said transformer and either of said
‘voltage sources, means for interrupting said circuit in
cluding a vibrating member and contacts interrupted
thereby connected in said circuit, an operating coil for
said interrupter means for actuating said vibrating mem
,
6. A timing light circuit for producing a ‘timed visible
impulse operable from one of two known voltage sources >
comprising a transformer having a single center tapped pri
mary winding and a single center tapped secondary wind~
ing, means for forming a circuit including the primary
winding of said transformer and either of said voltage
sources, means for interrupting said circuit including a vi
brating member and contacts interrupted thereby con
nected in said circuit, an operating coil for said interrupter
:means for actuating said vibrating member, a circuit in
70 cluding circuit controlling means including said operating
coil when said voltage source is at the said one value, said
circuit controlling means operable to one position when
circuit including a resistance in series with said operating
said voltage source is of one value and operable to a sec
coil when said voltage is at said second value, means for
ond position when said voltage source is at a second
rectifying the voltage across said secondary winding, said
value, a circuit. including said operating coil when said 75 circuit controlling means being operable in one position
- . ber, means connected to said voltage source and having
8,027,489
6
5
to connect said secondary winding in circuit with said
rectifying means and being operable in the second posi
tion thereof to connect a portion only of said secondary
winding in circuit with said rectifying means.
7. A timing light circuit for producing a timed visible
impulse operable from one of two known voltage sources
comprising a transformer having a single center tapped
primary winding and a single center tapped secondary
winding, means for forming a circuit including the pri
mary winding of said transformer and either of said 10
voltage sources, means for interrupting said circuit includ
ing a vibrating member and contacts interrupted thereby
connected in said circuit, an operating coil for said in
terrupter means for actuating said vibrating member,
position when said voltage source is at the said second
value, said circuit including a resistance in series with
said operating coil when said voltage is at said second
value, means ‘for rectifying the voltage across said sec
ondary winding, said circuit controlling means being
operable in one position to connect the whole of said
secondary winding in circuit with said rectifying means,
and being operable in the second half position thereof
to connect a portion of said secondary winding in circuit
with said rectifying means.
References Cited in the ?le of this patent
UNITED STATES PATENTS
means connected to said voltage source and having cir 15
cuit controlling means operable to one position when said
2,262,819
2,347,165
Rosser ______________ __ Nov. 18, 1941
Aust ________________ __ Apr. 25, 1944
voltage source is of one value and operable to a second
2,703,376
Board ________________ __ Mar. 1, 1955
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