GB836313A - Improvements in or relating to time switches embodying discharge tubes - Google Patents
Improvements in or relating to time switches embodying discharge tubesInfo
- Publication number
- GB836313A GB836313A GB14615/58A GB1461558A GB836313A GB 836313 A GB836313 A GB 836313A GB 14615/58 A GB14615/58 A GB 14615/58A GB 1461558 A GB1461558 A GB 1461558A GB 836313 A GB836313 A GB 836313A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- control
- resistor
- switch
- cathode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/28—Modifications for introducing a time delay before switching
- H03K17/288—Modifications for introducing a time delay before switching in tube switches
Landscapes
- Generation Of Surge Voltage And Current (AREA)
- Arc Welding Control (AREA)
Abstract
836,313. Control systems for resistance welding. PHILIPS ELECTRICAL INDUSTRIES Ltd. May 7, 1958 [May 8, 1957], No. 14615/58. Class 38 (4). [Also in Group XL (c)] A timing system comprises a gas tube fed via a resistor from a D.C. supply, a resistor connected between the cathode and the positive supply terminal, a mechanical or electronic switch between the cathode and the negative supply terminal, the control electrode being connected to a tapping across the supply; the timing being controlled by the discharge of a capacitor connected between the control electrode and cathode. In Fig. 1 the capacitor 4 is first charged via resistor 6 and part of the potentiometer 9. The timed period is initiated by closing a switch 7 which holds the tube 1 cut off until. capacitor 4 has discharged at a rate determined by the setting of the potentiometer 9. Tube 1 now conducts, providing a rapid fall of voltage between the output leads 14, 21. A discharge resistor may be connected at points 23, 24 and may be shunted by a diode to speed up the charging. In Fig. 4 (not shown), switch 7 is replaced by a further timer of the type shown in Fig. 1, so that two separate periods may be controlled by three output leads. Fig. 6 shows a part circuit of a combination of three such timers to provide control over three timed periods by leads 14, 21. A flip-flop formed by valves 30, 31 replaces the switch (equivalent to 7 of Fig. 1) of the last timer 1<SP>11</SP> and also provides re-setting of the system. Tube 30 is cut off when tube 31 is made conductive by an ignition pulse at 36. When the tube 30 is fired by a pulse at 37, tube 31 is cut off and timer 1<SP>11</SP> is started. Subsequently timers 1<SP>1</SP> and later 1 are started. When the last tube 1 fires, a pulse from the grid fires tube 31 and resets the system. If a repetitive operation is required, a time delay 41 is included so that the sequence may be restarted a certain time after the firing of tube 1. It is stated that the system may be coupled directly or via further tubes to control alternating current by means of a main pair of gas tubes connected in parallel opposition. Power frequency pulses from a saturated transformer may be injected into the system to provide synchronized operation. Resistance welding control.-The above-described system shown in Fig. 6 provides control of the duration of electrode pressure, welding current, and after pressure.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL217134 | 1957-05-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB836313A true GB836313A (en) | 1960-06-01 |
Family
ID=19750885
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB14615/58A Expired GB836313A (en) | 1957-05-08 | 1958-05-07 | Improvements in or relating to time switches embodying discharge tubes |
Country Status (7)
Country | Link |
---|---|
JP (1) | JPS3611901B1 (en) |
BE (1) | BE567444A (en) |
CH (1) | CH366879A (en) |
DE (1) | DE1053564B (en) |
FR (1) | FR1195683A (en) |
GB (1) | GB836313A (en) |
NL (2) | NL102597C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2556751A1 (en) * | 1975-12-17 | 1977-06-23 | Preh Elektro Feinmechanik | Electronic light timing circuit - has wide adjustable timing range using FET and Schmitt trigger switched by capacitance resistance timing circuit |
-
0
- NL NL217134D patent/NL217134A/xx unknown
- BE BE567444D patent/BE567444A/xx unknown
- NL NL102597D patent/NL102597C/xx active
-
1958
- 1958-05-06 DE DEN15041A patent/DE1053564B/en active Pending
- 1958-05-06 CH CH5916458A patent/CH366879A/en unknown
- 1958-05-06 FR FR1195683D patent/FR1195683A/en not_active Expired
- 1958-05-07 JP JP1250858A patent/JPS3611901B1/ja active Pending
- 1958-05-07 GB GB14615/58A patent/GB836313A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2556751A1 (en) * | 1975-12-17 | 1977-06-23 | Preh Elektro Feinmechanik | Electronic light timing circuit - has wide adjustable timing range using FET and Schmitt trigger switched by capacitance resistance timing circuit |
Also Published As
Publication number | Publication date |
---|---|
NL217134A (en) | |
NL102597C (en) | |
FR1195683A (en) | 1959-11-18 |
BE567444A (en) | |
CH366879A (en) | 1963-01-31 |
DE1053564B (en) | 1959-03-26 |
JPS3611901B1 (en) | 1961-07-29 |
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