US1880576A - Time delay apparatus - Google Patents
Time delay apparatus Download PDFInfo
- Publication number
- US1880576A US1880576A US486275A US48627530A US1880576A US 1880576 A US1880576 A US 1880576A US 486275 A US486275 A US 486275A US 48627530 A US48627530 A US 48627530A US 1880576 A US1880576 A US 1880576A
- Authority
- US
- United States
- Prior art keywords
- anode
- discharge
- cathode
- electrode
- discharge device
- 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 - Lifetime
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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
Definitions
- My invention relates to time delay circuits and more particularly to time delay circuits .of the electron discharge type.
- One of the objects of my invention is to provide a time delay apparatus of the electron discharge type in which the time interval produced by operation of the apparatus may be accurately predetermined over a long. range.
- a further object of my invention is to pro i vide time delay apparatus of the type indicated in whichthe time interval is substantially independentof variations of the potentials applied to the discharge device employed.
- Still a further object of my invention is to 15 utilize in a time delay apparatus the characteristic of an electron discharge device in that the anode current is'practically independent of anode voltage when the grid is f positive with respect to the cathode.
- an electron discharge device of the screen grid type this device having an anode 2, a 85 cathode 3, acontrol grid 4 and a screening grid 5 interposed between the anode andthe control grid 4, these electrodes being enclosed in a vessel which is evacuated sufiicient- 1y to cause the device to operate substantially unaffected by gas ionization.
- This discharge device is energized from any suitable source of electromotive force 6 which may be connected to the primary winding of transformer 7 having a plurality of secondary windings;
- the cathode of the discharge device 1 is energized from secondary winding 8 and has a resistance 9 connected in parallel therewith. In order that the grid and anode of the discharge device maybe energized with .uni-
- a rectifier 10 is provided which is connected in circuit with secondary winding 11 of the transformer 7 and a potentiometer 12, a suitable smoothing condenser 13 being connected in shunt with the potentiometer 12.
- the cathode of device 1 is connected to potentiometer 12 through a connection to the midpoint of resistance 9.
- the grid 5 of the discharge device 1 is connected to a point upon the resistance 12 such that it is main tained at a substantial positive potential with respect to the cathode, and the control grid 4 is connected to a point upon the resistance such that it is maintained at a negative tential with respect to the cathode.
- 'l lfe anode 2 is likewise connected to the potentiometer 12 through a suitable resistance 14 and a switch 15, the point upon the resistance 12 at which the anode is connected being such that it is at positive potential with respect to the screen grid 5.
- the'current flowing in the anode circuit of the discharge device issubstantially independent of variations in the anode voltage.
- I utilize this characteristic of the discharge device definitely to predetermine the time interval between the operation of a primary controldevice, such as the switch 15,
- . 14 is connected between the cathode and grid opposite condenser electrode.
- discharge a device 17 is preferably one of the vapor electric type; that is, the envelope is filled with an attenuated gas, such as mercury vapor.
- This type of discharge device used in the manner shown also lends itself to an accurate predetermination of the time interval since it is a characteristic of these devices that no anode current flows until the 'd voltage reaches a definite value with res t to the cathode.
- the anode current then ows having a magnitude independent of the grid voltage.
- the discharge device 17 is so adjusted, as by adjusting the tap 19 on resistance 20, that current starts to flow in the anode when a point is reached in the discharge characteristic of Fig. 2 which is indicated at 21.
- no'current flows v in the anode circuit until this point on the characteristic is reached.
- full anode current flows in the discharge device having magnitude de ndent upon the anode voltage, and indepen ent of the grid voltage, thereby' causing very positive actuation of the relay 16. It will of course be understood, however, that'other discharge devices may also be employed.
- a primary control device a secondary control device, and means for operating said secondary control device after a predetermined interval subsequent to operation of said primary control device
- said means comprising an electron discharge device having a cathode and two additional electrodes enclosed in a vessel, said vessel being evacuated sufliciently to cause operation of said device substantially unaffected by ionization of within said vessel, an energy storage device, connected between said additional electrodes, and means for operatingvsaid secondary control device at a time subsequent to operation of said first device dependent upon the rate of discharge of said energy storage device through action of said 7 electrodes.
- an electron discharge device having an anode, a cathode, and an additional electrode, energy storage means operable responsively to the discharge of said condenser.
- an electron discharge device having an anode, a cathode, a control electrode and a screening electrode interposed between the control electrode and anode, energy storage means connected between the screening electrode and anode, means for supplying negative electromotive force to said control electrode, means for supplying positive electromotive forces of unequal values to said screening electrode and anode whereby said energy storage means is charged. means for interrupting said supply of electromotive force to said anode whereby said energy storage means tends to discharge and means operable responsively to discharge of said energy storage means.
- an electron discharge device having a plurality of electrodes including an anode, a cathode and a grid electrode, a source of electromotive force, a connection between each of said electrodes and said source of electromotive force whereby unequal positive potentials with respect to said cathode are supplied to said anode and grid electrode, said anode being positive with respect to said grid electrode, an energy stor age device connected between the anode and grid electrode, means for interrupting the connection between said anode and source of electromotive force whereb the anode potential is dependent upon the energy stored in said energy storage means, and means operable responsively to current to said anode whereby said means is operated after a time interval subsequent to interruptionof said connection between said anode and source of electromotive force dependent upon the rate of discharge of said energy storage device.
- an electron discharge dev ce having an anode, a cathode, and an additional electrode, energy storage means connected between said additional electrode and anode, means for supplying electromotive forces of different values to said anode and additional electrode, whereby said energy storage means is charged, means to interrupt the supply of electromotive force from said means to said anode whereby said storage means tends to discharge, a vapor electrlc device connected to operate responsively to current to said anode and a relay connected in the anode circuit of said vapor electric device, whereby said relay is operated after a definite time interval subsequent to said interruption of the supply of electromotive force from said means to said anode.
- an electron discharge device having an anode, a cathode, a control electrode and a screening electrode interposed between the control electrode and anode, energy storage means connected between the screening electrode and anode,means for supplying negative electromotive force to said control electrode, means for supplying positive electromotive forces of unequal values to said screening electrode and anode whereby said energy storage means is charged, means for interrupting said supply electromotive force to said anode whereby said energy storage means tends to discharge and a va or electric device connected to respondto ischarge of said energy storage means.
- an electron discharge device having a cathode and two additional electrodes, an energy storage device connected between said additional electrodes, a source of electromotive force, connections from said cathode .and electrodes to said source arranged to supply potential with re-
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- Lasers (AREA)
- Generation Of Surge Voltage And Current (AREA)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US486275A US1880576A (en) | 1930-10-03 | 1930-10-03 | Time delay apparatus |
| DEA63475D DE634369C (de) | 1930-10-03 | 1931-09-22 | Zeitrelais mit Verstaerkerroehre |
| FR723825D FR723825A (fr) | 1930-10-03 | 1931-10-03 | Système à retardement réglable, utilisant les tubes à décharge électriques |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US486275A US1880576A (en) | 1930-10-03 | 1930-10-03 | Time delay apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1880576A true US1880576A (en) | 1932-10-04 |
Family
ID=23931251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US486275A Expired - Lifetime US1880576A (en) | 1930-10-03 | 1930-10-03 | Time delay apparatus |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US1880576A (de) |
| DE (1) | DE634369C (de) |
| FR (1) | FR723825A (de) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2591810A (en) * | 1948-09-25 | 1952-04-08 | Rca Corp | Electrical time-delay network |
| US2912622A (en) * | 1953-08-25 | 1959-11-10 | English Electric Co Ltd | Electrical relays |
-
1930
- 1930-10-03 US US486275A patent/US1880576A/en not_active Expired - Lifetime
-
1931
- 1931-09-22 DE DEA63475D patent/DE634369C/de not_active Expired
- 1931-10-03 FR FR723825D patent/FR723825A/fr not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2591810A (en) * | 1948-09-25 | 1952-04-08 | Rca Corp | Electrical time-delay network |
| US2912622A (en) * | 1953-08-25 | 1959-11-10 | English Electric Co Ltd | Electrical relays |
Also Published As
| Publication number | Publication date |
|---|---|
| FR723825A (fr) | 1932-04-15 |
| DE634369C (de) | 1936-08-25 |
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