US3001138A - Time switch circuit arrangement - Google Patents
Time switch circuit arrangement Download PDFInfo
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- US3001138A US3001138A US729409A US72940958A US3001138A US 3001138 A US3001138 A US 3001138A US 729409 A US729409 A US 729409A US 72940958 A US72940958 A US 72940958A US 3001138 A US3001138 A US 3001138A
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- resistor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K11/00—Resistance welding; Severing by resistance heating
- B23K11/24—Electric supply or control circuits therefor
- B23K11/248—Electric supplies using discharge tubes
Definitions
- This invention relates to time switches comprising a ser. ne. 729,4@
- controllable gas-filled or vapour-filled dischargetube fed via a resistor from a direct-current source and in whichV a charged capacitor is' included as a negativebiassig voltage 1n the grid circuit ofthe discharge tube, at least part of its period of discharge to the moment Vof igni ⁇ tion of the discharge tube being decisive for the" desiredperiod of time.
- a time switch may be used for several purposes, but is important more particularlyV for the control of two gas-filled or vapour-titled' main dis- NAY., a corporation ot Dell-:1
- charge tubes connected in anti-parallel (either directlyv or through one or more auxiliary discharge tubes) for resistance welding.
- a resistor is included between the junction of the cathode withthe capacitor and the positive terminal and a switch is included between said junction and the negative terminal, the grid being connected to a tapping point, preferably adjustable, on a potentiometer included between the positive andthe negative terminal.
- Such a' time s witch may operate either synchronously or asynchronously with regard to theualternating supply voltage for the said main dischargetubes.
- the switch between the cathode and thenegativ'e terminal may comprise a controllabledischarge'tube,v
- the switch may comprise a manually-operated mechanical switch or a relay.4
- a resistor is included between the 'grid and' the tapping point on the potentiometer, which resistor is preferably .bridged by a rectifier, the anode of which isgconnectcd to the grid.
- the resistor serves as a discharge resistor e is determined by themornent.
- FIG. l shows a controllable gas-lle d or vapour-filled discharge tube 1 having its anode connected via a resistor 2 to the positive terminal of a direct voltage source 3.
- the grid circuit of tube ll includes a capacitor 4., of which the junction 5 with the cathode is connected via a resistor u to the positive terminal, on the one hand, and via a switch "i to the negativel terminal, on the other.
- the grid is also connected to a ytapping point 8 on a potentiometer 9, included between the positive and the negative'terminal As soon as the'direct voltage source 3 has been con nected into circuit, the capacitor ⁇ t with the switch 7 opel.
- iidlhllid Patented Sept. i9, 'Bigdil at the anode is indicated by lill and the voltage at the .cathode of tube l is indicated by l2.
- the capacitor; t must rst be re-charged. up a certain time 'more particularly in the presence of a resi stor between the points 23' and 24, which is usually comparatively high-ohmic as compared to the resistor 6 and the lower portion of potentiometer 9.
- the resistor 25 (sea. FIG. 3) between the points 23 and 2d may be bridged by a rectifier 26, 'the anode of which is con nected to the grid, so that upon re-charging of capacitor'i, the .resistor 25 is short-.circuited and a rapid charge is thus rendered possible.
- the switch, l of FIG. l may be replaced tion of the electrode pressure and of 'the welding time
- switch '7' of FIG. 4 may be replaced by a third timey switchas shown inFIG. l.
- .ofthe switch 7 which is not show n, -a gasfilled 'dischargetnbe Sois arranged in flip-hop connection with ,7a.
- potentiometer havingsa tapping point'thereon connected to said grid, a second resistor connected to said positive polarity terminal, a capacitor for applying a negative biasing potential Ato said grid connected in serics between Vsaid second resistorv and the'said grid, means connecting .a point in said series connection common to said second resistor andsaid capacitor to said cathode, a second .electron discharge device having an anode, a cathode and a control grid, means connectingthe anode of said second -discharge device to said common point, a third resistor4 Y connecting the anode of saidsecond discharge device to i connected between said' terminals, said second 15 is'ignited andv thenlalsojaftersome time, tube 1 is Due .to the .ignitioiiof tube Jl, a voltage'pulse is suppliedfroriithe grid via a .capacitor 38 to the grid'of A vtubeSiL resultingin this tube being ignited and tube 3
- said third potentiometer having a tapping point thereon connectedto the 4grid of said third discharge device, a sixth' resistor connected to grid of said third discharge device, means connecting a pointin said series connection common to said sixth resistor and said third capacitor 4Q" tween said last-mentioned-common to the cathode of said third discharge device, switching means connected bepoint and said negative polarity terminal, means, for -deriving a ir'st output voltage froml said switching means, means for deriving a second output voltagefrom the anode of said third disa.
- a direct voltage terminaland a negative polarpositive polarity'. terminal forgsupplying a direct voltage terminaland a negative polarpositive polarity'. terminal, a potentiometer connected be tween said positive and negative polarity terminals, said tofsaid grid, a second charge device, means for deriving a third output .voltage from the anodeof said second discharge device, and means for deriving a fourth output voltage fromA the vanodeofsa'id yinst-mentioned discharge device.
- a timejswitch circuit arrangement comprising an electron discharge .device having an anode,a cathode and a control grid, means for supplying a direct voltage having a positive polarity terminal and a negative polar- .ity terminal, a first resistor connecting said anode to said positive polarity terminal, a potentiometer connected be- '--twecn said positiveand negative polarity terminals, said potentiometer having a tapping point thereon connected biasing potential to said grid connected in series between said second resistor and the said grid, means connecting a point in said series connection common to said second resistor and said capacitor to said cathode, a second electron discharge device having an anode, a'cathode and a control grid, means connecting the anode of said second discharge device to said common point, a third 'resistor connecting the anode of said second discharge device to said positivepolarity terminal, a second potentiometer connected between said positive and negative polarity terminals, said second
- a third potentiometer connected between said positive and negative polarity terminals, said third potentiometer having a tapping point thereon connected to the grid of 'clarity terminal, a third betwecnsaid positive andnegative polarity terminals, said-third .potentiometer having a tapping point thereon connected to the grid of said ⁇ third discharge device, a sixth resistor lconnected to said positive polarity terminal, ⁇ afthirdl capacitor for applying a4 negative biasing potential ⁇ to the grid of said third discharge d evice connected liniseries between, said sixth resistor ⁇ and said gridof said third discharge device, means connecting a poi v cathode of said thirdI discharge device, switching means connected between said last-.mentioned common point and saidnegativc polarity terminal, said switching means comprising fourth andl fifth electron discharge devices Veach having an anode, a cathode ,and a control grid conf voltage fromthe anode of ⁇ s aid' 'iir
- a ntime switch circuit arrangement comprising any electron discharge device having a'nar'iode, a cathode and a. control grid, means for supplying a direct voltage havterminal and a negative lpolarity d connecting said anodeto said positive. polarity terminal, a potentiometer-connected be ing a positive polarity terminal, l a iirst resistor rit in said series connection com- Y ifo:
- sixth resistor and said said third discharge device a sixth resistor connected to a third capacitor for applying a negative biasing potential to the grid of said third discharge device connected ⁇ in series between said grid of said third discharge device,
- saidtswi'tching means comprising fourth ⁇ and fth electron discharge devices each having an anode, a cathode and a control grid conoutput voltage from the anode of said rthird dischargel device'rneans for deriving tween said positive and negative polarity.
- potentiometer having a tapping Vto said grid, a second resistor connected to said positive I a capacitorv for applying a negative polarity terminal, biasing; potential to said grid connected iii series between said second resistor' and the said-grid, means connecting va point in said series connection common to said second resistoraiid said capacitor to said cathode, a second 'elecpoint ⁇ thereon connected,
- a delay circuit means coupling'the anode of said fifth discharge device to the grid'of said fourth discharge t devicemeans connecting the anode of said fourth discharge device to ⁇ the cathode of saidl third discharge 'device-and means connectingthe grid of said fifth discharge device to the grid of said first-mentioned dis ⁇ 'v charge device, means for deriving a first output voltage troni said switching means, means for deriving a second the anode of said second discharge device, and means AVV timel switch circuitarrangement comprising atl electrondischarge device having :in anode, a cathode and v l:having apo'sitive'polarity'terminal and a' negative polar# 'acontrol'grid means for supplying a direct voltage ity terminal, an impedance element connecting said anode ducting device shunted across said third resistor element,
- tron discharge device having ananode, a cathode and,l
- a control grid means connectingtheanode of said-seo ond' discharge device to said common pointya third resistor connecting the anode of said'seconddischarge device to said positive polarity terminal, a second poten-- tiometer connected between said positive and negative ⁇ polarity terminals; said second potentiometer having a 'connected to thegrid ofsaid sccond discharge device,a fourth're'sistorconnected tosaid in eaiisfor ⁇ applying v grid maintaining' said discharge device atfanode current a negative biasing potential to said cutoi for a predetermined time interval, said means comprising a ⁇ capacitor having one terminal thereof connected tosaid positive terminal through said first resistor ⁇ eleineritand having thegsecond terminal thereof -con nectedto said negative terminal through said second and third; resistor elements connected fin 'sei-ies, means for connecting the ji'inctionfofsaid4 capacitor and said third resistor element ,to said control grid, and's
Description
smug@ f 5 3 d u.. :a
`Filed April 18, 1958 HL 1A. M. JACOBS HTM, TIM'swITcH CIRCUIT ARRANGEMENT eNvE'n-Dw HENR JOSEPH ANTONIUS MARIE JACOBS LEONARDUS 'FRANSISCUS VAN WEUDEVEN @tra incrire t :EM cdi/'WITCH 'CIRCUIT RRANIGEMEN'II" llllenri .lloseph Antonius Marie-.llacobs 'sindV Leonardus Fransiscns van de Weijdeven, both of lEindhoven,`
This invention relates to time switches comprising a ser. ne. 729,4@
controllable gas-filled or vapour-filled dischargetube fed via a resistor from a direct-current source and in whichV a charged capacitor is' included as a negativebiassig voltage 1n the grid circuit ofthe discharge tube, at least part of its period of discharge to the moment Vof igni` tion of the discharge tube being decisive for the" desiredperiod of time. Such a time switchmay be used for several purposes, but is important more particularlyV for the control of two gas-filled or vapour-titled' main dis- NAY., a corporation ot Dell-:1
Netherlands May-8, i957.
charge tubes connected in anti-parallel (either directlyv or through one or more auxiliary discharge tubes) for resistance welding.
According to the invention, a resistor is included between the junction of the cathode withthe capacitor and the positive terminal and a switch is included between said junction and the negative terminal, the grid being connected to a tapping point, preferably adjustable, on a potentiometer included between the positive andthe negative terminal. I
The desired period of tim of the passage of current through the switch upon closure thereof and the moment when thev discharge tube is ignited af-ter the capacitor has sulciently discharged.
Such a' time s witch may operate either synchronously or asynchronously with regard to theualternating supply voltage for the said main dischargetubes." In the former case, the switch between the cathode and thenegativ'e terminal may comprise a controllabledischarge'tube,v
the control of which is synchronized with said alternat-v ing voltage, whereas, in the second case,the switch may comprise a manually-operated mechanical switch or a relay.4
.According to a further feature of theinvention, a resistor is included between the 'grid and' the tapping point on the potentiometer, which resistor is preferably .bridged by a rectifier, the anode of which isgconnectcd to the grid. The resistor serves as a discharge resistor e is determined by themornent.
f'or the capacitor, the presence of the rectifier permitting rapid recharging of the capacitor.-
In order that the invention may be lreadily carried l into effect, it will now bedescribed more fully, byway of example, with reference to the accompanying drawing.
FIG. l shows a controllable gas-lle d or vapour-filled discharge tube 1 having its anode connected via a resistor 2 to the positive terminal of a direct voltage source 3. The grid circuit of tube ll includes a capacitor 4., of which the junction 5 with the cathode is connected via a resistor u to the positive terminal, on the one hand, and via a switch "i to the negativel terminal, on the other. The grid is also connected to a ytapping point 8 on a potentiometer 9, included between the positive and the negative'terminal As soon as the'direct voltage source 3 has been con nected into circuit, the capacitor` t with the switch 7 opel. will be charged via resistor 6 and the lower portion ot potentiometer 9 to the voltage of the. positive terminal decreased by the voltage on the tapping point d, sothat the grid of tube ll has a negative biassing'potential. The voltage at capacitor l is represented by ll0 inFIG.v2, in which the positive and negative terminals are indicated by i l t5- and Furthermore, in FIG. 2, the'positive voltage The disadvantage may 'This fates.
iidlhllid Patented Sept. i9, 'Bigdil at the anode is indicated by lill and the voltage at the .cathode of tube l is indicated by l2.
When switch 7 is closed point I3 at the cathode in lFIG. l suddenly becomes negative due to the connection discharged to an extent such that tube l. is ignited, as
represented by the line i9. Consequently, the positive voltage at the anode of ,tube lt decreases, for example, to the value 2G', which is at the same time the voltage at theoutput terminal 2l in FIG, l. Variations in potential thus occur at the terminals liti and 2i. with an inter- Yval as represented by the line 22 in FIG. 2, which variations may serve as control pulses for determining a desired period of time, for example the welding time forwelding tools. .The moment oi ignition of tube ll at i8 may be determined more accurately if peak voltages (for example from a saturated transformer) are superimposed on the voltage 17 of capacitor d.
In the case described, the :desired period'of time is dependent upon the adjustmentof the tapping point (i on the potentiometer 9, by which the voltage llt) of capacitor 4 is determined, and upon the value of the lowel portionlot= potentiometer 9,. throughlwhich the capacitol is discharged, and hence also upon the adjustment ot tapping point 3. This is objectionable in many cases.
be vovercome'by providing a separate resistor between. the Vpoints 23 and 2d in FIG. 1, so that thetime olt discharge 22 is less dependent upon the adjustment of the tapping point 8.
It isfrequently desirable that, immediately after expiration .of 'the period of time 22, the circuit should again be ready for a subsequent switching manipulation. For this purpose, the capacitor; t must rst be re-charged. up a certain time 'more particularly in the presence of a resi stor between the points 23' and 24, which is usually comparatively high-ohmic as compared to the resistor 6 and the lower portion of potentiometer 9.
In order to overcome this disadvantage, the resistor 25 (sea. FIG. 3) between the points 23 and 2d may be bridged by a rectifier 26, 'the anode of which is con nected to the grid, so that upon re-charging of capacitor'i, the .resistor 25 is short-.circuited and a rapid charge is thus rendered possible.
In certain cases, aplurality oiA switching manipula- 'tions in succession are desired wlthout any interruption,
for example with resistance-welding tools, for which a certain duration of the electrode pressure prior to welding; of the welding process and a certain duration of the electrode pressure after welding are desired.
In such cases. the switch, l of FIG. l may be replaced tion of the electrode pressure and of 'the welding time,
as indicated by28 .and Z9.r espective ly in FIG'. 5.
I-n a similari manner, the switch '7' of FIG. 4 may be replaced by a third timey switchas shown inFIG. l.
A simple. automatic switch to replace the switch 7, '7y
-or the corresponding switch v7" (not shown) in the said third time switch may be Constltuted by a flip-ilop circuit is thus positive,
, .certain time* after .cathode and ai contr'Ol..
tive polarity terminals,fsd second potentiometer f Erneans, yineai'is y for deriving a i l the anode of said second discharge device, and means for deriving rst-m'entioned discharge device;
as shown inlliIG'i '6,-it 'being possible for the whole circuit vto be designedy for only one work program or for repeated performance.'
Instead .ofthe switch 7", which is not show n, -a gasfilled 'dischargetnbe Sois arranged in flip-hop connection with ,7a. tube Slhby me.an`s of. a common cathode resistor 32, a'capa'citor 33"and anode resistors. and'SS. One output terminal 14"'isc6nnected to-the' anode of Tube y31, normally, `is conducting, for example by means' of an ignition pulsesupplied'at the arrow 36,' .The
Y. .ia-naw,- tuuese is ignited lat s?, the Avoltage-.at llt-"decreases andtubeM extinguishes. The tube I'f lis lignited after soineft-ime', subsequently tube l' ignited-.2
potentiometer havingsa tapping point'thereon connected to said grid, a second resistor connected to said positive polarity terminal, a capacitor for applying a negative biasing potential Ato said grid connected in serics between Vsaid second resistorv and the'said grid, means connecting .a point in said series connection common to said second resistor andsaid capacitor to said cathode, a second .electron discharge device having an anode, a cathode and a control grid, means connectingthe anode of said second -discharge device to said common point, a third resistor4 Y connecting the anode of saidsecond discharge device to i connected between said' terminals, said second 15 is'ignited andv thenlalsojaftersome time, tube 1 is Due .to the .ignitioiiof tube Jl, a voltage'pulse is suppliedfroriithe grid via a .capacitor 38 to the grid'of A vtubeSiL resultingin this tube being ignited and tube 3 0 extinguishing. The initial condition is then restoredv again. f A COD'OI. fthe' electrode pressure, the welding time and lthe after-pressure `of the electrodes is indicated -dia-v grammaticallybyj23y29 andiitv in FIG, 7. j
When arepetitiorigofthis program is desired, 'an out- -put terminal 40ct the anodel of tube 31 maybe connected viaa time delay 'lilfltogthecoii'trol of tube tl'so that a expiration o i-the pulse 2l in FIG. 7, the pulseilft'zf-is Iagain*produced by ignition of tube 30. 30
electron; discharg'odvice having ananode, a 'cathode-and having a'posit'ivepolarityterminal and a negative polar-A ity 'terni'inah a, first "resistorf- 'said' positive po-l'a'rit-y{.,termiiial, v
connecting said-anode to a potentiometer connected lbetween saidposit-ive,andv negative `polarity terminals, said potentiometer --having agt'apping point thereon con-v .neetedto saidk grid,
second' resistor connected lto' said positive polarity terininal,1. a'vcapacitor for applying va negative biasingpoten'tial tosad gridl connectedl in series charge device, aV fourth said fourth resistor and said positive polarity terminal, a second potentiometer positive and negative polarity potentiometer having a tapping to the grid of said second disresistor connected to said positive polarity terminal, a-second capacitor for' applying a negative biasing potential to the grid of said seconddischarge device connected in series between said fourthA resistor and said grid of said second discharge devicemeans connecting a point in `said'seriesconnection common to point thereon connected odeof-said second discharge device, a third electron discharge device havingan anode, a cathode and a control grid, means connecting the anode ofv said third discharge device `to saidk last-'mentioned common point, anfth resistor connecting the anode of said third discharge device to said positive polarity terminal, a third potentiometer connected between saidpositive and negative. polarity .terminals, said third potentiometer having a tapping point thereon connectedto the 4grid of said third discharge device, a sixth' resistor connected to grid of said third discharge device, means connecting a pointin said series connection common to said sixth resistor and said third capacitor 4Q" tween said last-mentioned-common to the cathode of said third discharge device, switching means connected bepoint and said negative polarity terminal, means, for -deriving a ir'st output voltage froml said switching means, means for deriving a second output voltagefrom the anode of said third disa. third resistor connecting -theranode'of said second discharge'device 4tojsaid` positive polarity terminal, a second potentiometer connected-between said positive and .negaliaving altap'ping' point: thereon'conn'ected to the of said second'discharge device; a fourth resistor .connected to said positive polarity terminal, a second capacitor` for` applying 'afnegatiie biasing 'potential to the'gridof said second dis'hasgdevice connected in series between said vifolirth -resistor 'and said grid t device; means conn'ectinga point in saidserie's connection common to said-'fourth resistor and said second ca- -of said second ,discharge pacitor to. the Acat hod e, o' f said lsecond discharge device,
switching -means connected' between said last-mentioned 'common point and said ynegative 'polarity terminal, means for v deriving a `iiistqo'utpu-t voltage from said switching second output voltage from avthrd output voltgefrom the anode of said v 2. -A'tiine switch lcircuit arrangement comprising. an
forgsupplying a direct voltage terminaland a negative polarpositive polarity'. terminal, a potentiometer connected be tween said positive and negative polarity terminals, said tofsaid grid, a second charge device, means for deriving a third output .voltage from the anodeof said second discharge device, and means for deriving a fourth output voltage fromA the vanodeofsa'id yinst-mentioned discharge device.
-3. A timejswitch circuit arrangement comprising an electron discharge .device having an anode,a cathode and a control grid, means for supplying a direct voltage having a positive polarity terminal and a negative polar- .ity terminal, a first resistor connecting said anode to said positive polarity terminal, a potentiometer connected be- '--twecn said positiveand negative polarity terminals, said potentiometer having a tapping point thereon connected biasing potential to said grid connected in series between said second resistor and the said grid, means connecting a point in said series connection common to said second resistor and said capacitor to said cathode, a second electron discharge device having an anode, a'cathode and a control grid, means connecting the anode of said second discharge device to said common point, a third 'resistor connecting the anode of said second discharge device to said positivepolarity terminal, a second potentiometer connected between said positive and negative polarity terminals, said second potentiometer havingV a tapping 'point thereon connected to the grid charge device, a tive polarity terminal, a second capacitor for lapplying a of said second disnegative biasing potential to the grid of said second discharge device connected in series between said fourth resistor and said grid of said second discharge device,
means connecting a point in said series connection comsaid second capacitor to the cath.
connected in series .between said sixth resistor 'and said i resistorconnected Ato said positive polarity terminal, a capacitor -for applying a negative fourth resistor connected to said posi-v 'I inon to said fourth resistor tapping poiritthereon thecathode or said second'v discharged'evice, ajtliird elec. tron discharge device having 4"an anode, a 'cathode andy a control grid, means connecting the anode of said third discharge device to said last mcntioned common point, a fifth., resistor connecting the anode'of said third dis-vv charge device to said positive. .p potentiometer connecting and: said Second capacitor toV of said third discharge device to said last-mentioned common point, a fifth resistorconnecting the anode of said third discharge device to said positive polarity' terminal,
a third potentiometer connected between said positive and negative polarity terminals, said third potentiometer having a tapping point thereon connected to the grid of 'clarity terminal, a third betwecnsaid positive andnegative polarity terminals, said-third .potentiometer having a tapping point thereon connected to the grid of said` third discharge device, a sixth resistor lconnected to said positive polarity terminal,` afthirdl capacitor for applying a4 negative biasing potential `to the grid of said third discharge d evice connected liniseries between, said sixth resistor `and said gridof said third discharge device, means connecting a poi v cathode of said thirdI discharge device, switching means connected between said last-.mentioned common point and saidnegativc polarity terminal, said switching means comprising fourth andl fifth electron discharge devices Veach having an anode, a cathode ,and a control grid conf voltage fromthe anode of `s aid' 'iirst-mentioned discharge' device.
4.#A ntime switch circuit arrangement comprising any electron discharge device having a'nar'iode, a cathode and a. control grid, means for supplying a direct voltage havterminal and a negative lpolarity d connecting said anodeto said positive. polarity terminal, a potentiometer-connected be ing a positive polarity terminal, l a iirst resistor rit in said series connection com- Y ifo:
"said" lpositive polarity terminal,
sixth resistor and said said third discharge device, a sixth resistor connected to a third capacitor for applying a negative biasing potential to the grid of said third discharge device connected `in series between said grid of said third discharge device,
means connectingia point in said series connection'commonto said sixth resistor and said third capacitor to thecathode of Ssaid third discharge device, switching means v connected between said last-mentioned common point i mon to 'said sixth resistor'and said third capacitor tothe.
andv said negativepolarity terminal, saidtswi'tching means comprising fourth` and fth electron discharge devices each having an anode, a cathode and a control grid conoutput voltage from the anode of said rthird dischargel device'rneans for deriving tween said positive and negative polarity. terminals,=said potentiometer 'having a tapping Vto said grid, a second resistor connected to said positive I a capacitorv for applying a negative polarity terminal, biasing; potential to said grid connected iii series between said second resistor' and the said-grid, means connecting va point in said series connection common to said second resistoraiid said capacitor to said cathode, a second 'elecpoint `thereon connected,
f for deriving a fourthoutput voltage 1 said firstrnentioned discharge device.
-to ,said positive nected Lin flip-op circuit arrangement with each other,
a delay circuit, means coupling'the anode of said fifth discharge device to the grid'of said fourth discharge t devicemeans connecting the anode of said fourth discharge device to` the cathode of saidl third discharge 'device-and means connectingthe grid of said fifth discharge device to the grid of said first-mentioned dis` 'v charge device, means for deriving a first output voltage troni said switching means, means for deriving a second the anode of said second discharge device, and means AVV timel switch circuitarrangement comprising atl electrondischarge device having :in anode, a cathode and v l:having apo'sitive'polarity'terminal and a' negative polar# 'acontrol'grid means for supplying a direct voltage ity terminal, an impedance element connecting said anode ducting device shunted across said third resistor element,
tron discharge device having ananode, a cathode and,l
a control grid, means connectingtheanode of said-seo ond' discharge device to said common pointya third resistor connecting the anode of said'seconddischarge device to said positive polarity terminal, a second poten-- tiometer connected between said positive and negative `polarity terminals; said second potentiometer having a 'connected to thegrid ofsaid sccond discharge device,a fourth're'sistorconnected tosaid in eaiisfor `applying v grid maintaining' said discharge device atfanode current a negative biasing potential to said cutoi for a predetermined time interval, said means comprising a` capacitor having one terminal thereof connected tosaid positive terminal through said first resistor `eleineritand having thegsecond terminal thereof -con nectedto said negative terminal through said second and third; resistor elements connected fin 'sei-ies, means for connecting the ji'inctionfofsaid4 capacitor and said third resistor element ,to said control grid, and'switching `means connected between said negative terminal and the juncl non of said capacitor and said first resistor element, said positive polarity terminaha second capacitor-.tor applyf ing a negative lbiasingfpotential to-the grid of said seci ond discharge deviceI connected in series between said i -foui'th resistor and said grids-of said second discharge device,
means connecting a point. in said series connection common to said fourthresistor andsaid second capacitor -to the cathode of a third electron discharge cathode .and a control grid,
device having an anode, a means connecting the anode said Second discharge device,
capacitor and the second and third resistor elements'having values at which the capacitor discharge time is substantially equal to said predetermined time interval.
`References Cited in the file ofthis patent UNITED STATES PATENTS t Livingston Dec. 28, `1943 t 2,368,477V Kinsman .jJan. 30, 1945 2,536,022 Beach et al. Jan. 2, 1951 'i 2,735,007 McCurdy Feb. 14, 1956 Janssen et al. Feb. 17, 1959 a' third output voltage ,fromv from' the anode of polarity terminal, a tirst resistor elemenh 4'a `potentiometer connectedv between said positive and negative terminals and comprising a second resistor elementga third resistor element, Va `unidirectionally con`
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL3001138X | 1957-05-08 |
Publications (1)
| Publication Number | Publication Date |
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| US3001138A true US3001138A (en) | 1961-09-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US729409A Expired - Lifetime US3001138A (en) | 1957-05-08 | 1958-04-18 | Time switch circuit arrangement |
Country Status (1)
| Country | Link |
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| US (1) | US3001138A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3223852A (en) * | 1961-09-21 | 1965-12-14 | Lucas Industries Ltd | Switching circuits |
| US3324306A (en) * | 1961-02-20 | 1967-06-06 | Ncr Co | Switch-operable bistable multivibrator unaffected by contact bounce |
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| US2536022A (en) * | 1947-07-17 | 1951-01-02 | Eugene H Beach | Resistance testing device |
| US2735007A (en) * | 1956-02-14 | Time-base generator | ||
| US2874329A (en) * | 1954-11-10 | 1959-02-17 | Philips Corp | Circuit arrangement for producing a sawtooth current in the vertical deflector of a television apparatus |
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|---|---|---|---|---|
| US2735007A (en) * | 1956-02-14 | Time-base generator | ||
| US2337905A (en) * | 1941-07-23 | 1943-12-28 | Gen Electric | Time delay relay |
| US2368477A (en) * | 1942-06-22 | 1945-01-30 | Gen Electric | Electric time delay relay |
| US2536022A (en) * | 1947-07-17 | 1951-01-02 | Eugene H Beach | Resistance testing device |
| US2874329A (en) * | 1954-11-10 | 1959-02-17 | Philips Corp | Circuit arrangement for producing a sawtooth current in the vertical deflector of a television apparatus |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3324306A (en) * | 1961-02-20 | 1967-06-06 | Ncr Co | Switch-operable bistable multivibrator unaffected by contact bounce |
| US3223852A (en) * | 1961-09-21 | 1965-12-14 | Lucas Industries Ltd | Switching circuits |
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