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Патент USA US2409890

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Oct. 22,‘ 1946. ‘
'
2,409,889
J. OGDEN
TIMING DEVICE
'
Original Fiied Sept. 21, 1940 ‘
J”
2,409,889
Patented Oct. 22, 1946
~ UNITED STATES " PATENT QQOFFICE“
TIMING DEVICE
Jack Ogden, Huntington Woods,‘ Mich., assignor
to General Motors Corporation, Detroit, Mich.,
a corporation of Delaware
Original application September 21, 1940, Serial
No. 357,794. Divided and this application Sep
tember 22, 1945, Serial No. 617,991
7 Claims. (Cl. 161—15)
2
1
ergizes the relay coil I56. The tube I44 on the
other hand supplies power across another pair of
more speci?cally to electrical circuits for meas
condensers I18 and I80 which are in parallel
uring minute time intervals and is a division of
across a variable resistor I82 through lines I84
S.‘ N. 357,794 ?led September 21, 1940, The need
and I86. The resistor I82 has two adjustable taps
for means for measuring very small increments
l88 and I90, the ?rst of these being connected
of time has increased considerably and at the
through line I92 to a cathode I94 of a “magic
present time devices of this nature are much in
eye” or 6E5 tube of the cathode ray type. Line
demand. As one example which may be men
I92 is also connected to one side of a resistor I96
tioned is that of timing the various steps of Weld
and one side of condenser I98, the opposite side of
ing machine cycles which are at the most a few
the last-named resistor being connected by line
electrical cycles long. There are of course many
200 to a stationary contact 202. The opposite
other instances in which time intervals approxi
side of the last-named condenser is connected
mately the length of electrical cycles must be
through line 204 to line 206, the latter being con
measured for correct timing and operation.‘
It is therefore an object of my invention to 15 nected to a movable switch element 208 and also
to the grid or control element 2I0 of the 6E5
provide timing means capable of measuring small
tube. The stationary switch member cooperat
time periods.
ing with the movable switch element 208 is con
It is a further object of my invention to pro
nected by line 2I2 to a movable switch member
vide such a timing device as can be easily trans
2I4 on the member actuated by the relay coil 58.
ported and connected to means whose actuation
' This invention relates to timing devices and
it is desired to time.
Line 204 continues and is connected to a movable
.
switch point 2I6 movable with the members I16
It is a still further object of my invention to
provide timing means which is easily and accu
and 2| 4 all three of which are supported on a
common bracket and moved simultaneously by
With these and other objects in view which will 25 actuation of the relay coil 58. It should also be
noted that the switches I68-l16 and 2I6—‘—2I8
become apparent as the speci?cation proceeds,
are closed upon energization of the relay coil 58
my invention will be best understood by reference
to the following speci?cation and claims and the - while switch 202-—2I4 is opened upon such ener
gization. Any suitable spring bias means (not
illustration in the accompanying drawing, in
30 shown) may be provided to return the movable
which:
'
switch arm upon deenergization of the coil '58 to
' 'Thel?gure shows a schematic Wiring diagram
rately adjusted to read the required period.
of the measuring system of my invention.
its deenergized positionto close switch 202--2I4
and open switches I68--I16 and 2I6—2I8_ The
movable contact 2I6 cooperates, as mentioned,
'
Referring now more speci?cally to the drawing,
there is provided a power supply line I40 of for
example the conventional 110 volt 60 cycle to 35 with a stationary contact 2I8 which is connected
by line 220 with a resistor 222 the opposite side of
supply power for the indicating apparatus.’ This
which is connected by a line 224 to a variable
resistance 226 which is in turn connected to the
incoming 110 volt line is connected to two rec
ti?er tubes I42 and I44 which supply the nec
essary direct current from the usual alter
line I86.
nating current supply.
of the 6E5 tube are connected across a resistor
The tube I42 supplies
The remaining elements 228 and 230
direct current across a pair of condensers I46
and I48 and a resistor I50 through lines I52
and I54. The line I54 continues and is con
nected to a relay coil I56 the opposite side of
which is connected by line I58 to a variable re 45
232 and thence by common line 234 to the ad
justable tap I90 on the resistor I82. The incom
ing lines 56 and 28 connected to the operating
relay 58 are supplied with power from the mech
anism whose operating periods it is desired to
sistor I60, the adjustable tap I62 of which is
connected by line I64 to line I66, this line being
measure. They may be connected across certain
connected in turn to a stationary switch point
I68, Between lines I54 and I66 there is pro
vided a ?xed condenser I10. The adjustable tap
I12 engaging resistor I50 is connected by line I14
to a movable switch point I 16 actuated by a relay
coil 58 and cooperates with the stationary switch
point I68 just described. Thus the tube I42 sup
long the equipment is energized for any portion
‘plies power to charge the condenser I18 and en
portions of a welding circuit to determine how
of its cycle or they may be connected with some
other equipment whose operating cycle it is de
sired to time.
The over-all operation of the system may be
brie?y described in that when the relay coil 58
is energized the 6E5 pattern closes and if the
55
time period is such that the pattern will just
3
2,409,889
4
close without over~lapping the operator will be
however, a series of impulses is being studied it
able to determine from the setting on the variable
resistor 226 which is calibrated in timed periods
how long that time interval is. If the 6E5 tube
will be comparatively easy for the operator to
adjust the resistor 226 for, as far as he will be
concerned, the cathode ray tube appears to have
closes too far or over-laps then more resistance
the opening or closing relatively stationary and
will be introduced into the circuit and the read
ing will therefore be less or vice versa, if the tube
does not entirely close then less resistance is in
he can adjust to the proper point. If it is de
sired to study a different portion of the working
cycle it will only be necessary to so connect lines
serted so that the same may entirely and com
56 and 28 so that they will be energized by the
pletely be closed. Therefore, when relay 58 is 10 new portion of the complete cycle whose duration
energized and attracts its armature switches
it is now desired to measure.
I58--I16 and 2I8-2I6 close and switches 202
2I4 open the closure of switches I68-I1B causes
the energization of relay coil I56 through the fol~
I claim:
1. In a timing device, a cathode ray tube hav
ing a target and control electrode, a condenser
lowing circuit: From the output of tube I42, line 15 connected to said control electrode whereby the
I54, relay coil I56, line I58, resistor I60, tap I62,
charge thereon will alter the pattern on the tar
line I64, line I66, switch contact I68, switch con
get, a source of voltage connected to the con
tact I16, line I14, adjustable tap I12, resistance
denser, a. variable resistance connected between
I50 to line I52. At the same time tube I42 supplies
the source and the condenser, switching means to
voltage to the condenser I10 through an obvious 20 control .the circuit whereby the condenser is peri
circuit. When the relay coil I56 is then energized
odically charged and discharged and the pattern
it attracts its armature and opens the switch 203.
With the opening of this switch and also switch
202--2 I4 the ‘short circuit which has been applied
to condenser I98 is removed and the closure of
switch 2I6-2I8 applies to this condenser
through a circuit to be described the output of
the tube I44. This circuit is as follows: line I86,
variable resistor 226, line 224, resistor 222, line
228, switch 2‘I6-2I8 directly to condenser I 98.
on the target is simultaneously varied as the
switching means is operated, and automatically
operated delay means connected into said circuit
to prevent immediate discharge of the condenser
upon deenergization of the switching means.
2. In a timing device, a cathode ray tube hav
ing a target, a source of power, a variable resist
ance connected thereto and having a calibrated
30 dial, a control electrode in the tube, a condenser
The amount of energy applied to the condenser
I98 is regulated by the setting of the variable
resistor 226, the dial of which is calibrated in
cycles. This voltage is applied to the control ele
ment or grid ZIO of the 6E5 tube and causes the
shadow portion to become smaller and if resistor
226 is properly set will disappear entirely, the
setting of this dial indicating the length of time
of the operation. The necessary operating volt
ages for the remaining elements of the tube are 40
provided by lines I92 and 234 through resistance
I82 by obvious circuits.
When the machine cycle has been completed
and the relay 58 deenergized, the switches I68
I16 and 2I6--2I8 will open and switch 202--2I4
will'reclose, the opening of switch 2l6-2IB will
remove the supply of energy from the condenser
I98 and the opening of the switch I68-—I16 will
open the circuit to the relay coil I56. However,
connected thereto and to the resistance, whereby
‘the charge on the condenser controls the elec
trode potential and the pattern on the target and
the resistance varies the rate of charge so that
a desired pattern may be obtained, the dial act~
ing as an index means, a shunt circuit for short
ing out the condenser to discharge the same,
switching means in the shunt, relay means to
control the switching means and delay means to
prevent the immediate deenergization of the re
lay and shorting of the condenser upon general
deenergization of the system.
3. In a timing device, a cathode ray tube hav
ing a target and control electrode, a condenser
connected to said control electrode whereby the
'charge thereon will alter the pattern on the tar
get to indicate a predetermined charge, a source
of voltage connected to the condenser, a variable
resistance connected between the source and the
this relay will not immediately drop its contact
condenser, switching means operating in succes
208 inasmuch as the condenser I10 is directly
sive
timed sets of series, said sets having din‘erent
across the relay terminals. This charge will
length pulses but all of one series being of the
slowly leak off and in a short time the switch 208
same length to control the circuit whereby the
will drop, completing the short-circuit around
condenser is brought to said predetermined
the condenser I98 and discharging the same, re 55
charge as indicated by the cathode ray tube by
turning the apparatus to its initial condition.
a single series of pulses and if the length of the
This delay is provided to allow a time to elapse
pulses of a series is changed the resistance may
between the charge and discharge of the con
‘be
varied to still bring ‘the condenser to the same
denser I98 so that the retina of the eye of the
charge,
and an indicating dial on said variable
operator or observer may follow the ?uctuations
resistance to denote the time during which the
‘on the shadow in the cathode ray tube. It will 60 series
of pulses was applied.
thus be ‘evident that as the variable resistor 226 is
4.
In
a timing device, a cathode ray tube hav
altered to cause the shadow to completely dis
ing a target, a control electrode in said tube
appear without over-lap that the reading on this
dial will give the duration of the portion of the 65 whose potential controls the con?guration on
‘said target, a source of power, variable resistance
cycle being measured.
means connected to the source, a condenser con
In most equipment passing through or operat
nected to said variable resistance and to the
ing on a complete working cycle there is a suc
control electrode, and a periodically timed switch
cessive reoccurrence of that portion of that cycle
controlling the circuit whereby as the length of
in which the operator may be interested which
70 time the switch is closed is varied, the rate of
will cause the indications on the 6E5 tube to
charging the condenser may also be varied to
re-appear at rapid intervals and the relay 58
bring the condenser up to a predetermined charge
would therefore be rapidly and successively ener
as indicated by the con?guration on the cathode
gized for a series of similarily timed impulses for
target.
the given timed interval to be measured. Since 75
5. In a timing device, a cathode ray tube hav~
2,409,889
5
ing a target thereon capable of producing a pre
determined con?guration, a control electrode for
said tube whereby when a certain voltage is ap
plied to the electrode the con?guration will be
produced, a condenser connected to the electrode,
the voltage thereacross being applied to the elec-!
trode, a source of power of substantially constant
voltage, a variable resistance and a switch con
nected in series between the source and the con
6
for similar time periods whereby by regulating
said resistance the charge on said condenser may
be brought to a given value though the time pe
riod may be changed by altering the voltage
applied and therefore the desired con?guration
will be obtained to indicate this value, and dial
means in conjunction with said resistance to
indicate the time period involved since that is
proportional to the voltage applied.
denser, means operating said switch periodically
for similar time periods whereby by regulating
7. In a timing device, a cathode ray tube hav
ing a target and control electrode, a condenser
said resistance the charge on said condenser may
be brought to a given Value though the time pe
connected to said control electrode whereby the
charge thereon will alter the pattern on the tar
riod may be changed by altering the voltage ap
plied and therefore the desired con?guration
will be obtained to indicate this value.
get to indicate a predetermined charge, a source
of voltage connected to the condenser, a variable
resistance connected between the source and the
condenser, switching means operating in succes
6. In a timing device, a cathode ray tube hav
ing a target thereon capable of producing a pre
sive time sets of series, said sets having dilferent
length pulses but all of one series being of the
determined con?guration, a control electrode for
said tube whereby when a certain voltage is ap 20 same length to control the circuit whereby the
condenser is brought to said predetermined
plied to the electrode the con?guration will be
charge as indicated by the cathode ray tube by
produced, a condenser connected to the electrode,
a single series of pulses and if the length of the
the voltage thereacross being applied to the elec
pulses of a series is changed the resistance may
trode, a source of power of substantially constant
voltage, a variable resistance and a switch con 25 be varied to still bring the condenser to the same
nected in series between the source and the con
denser, means operating said switch periodically
charge.
JACK OGDEN.
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