GB497760A - Improvements in or relating to electrical oscillators and time base circuits - Google Patents
Improvements in or relating to electrical oscillators and time base circuitsInfo
- Publication number
- GB497760A GB497760A GB17865/37A GB1786537A GB497760A GB 497760 A GB497760 A GB 497760A GB 17865/37 A GB17865/37 A GB 17865/37A GB 1786537 A GB1786537 A GB 1786537A GB 497760 A GB497760 A GB 497760A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- target
- coil
- control electrode
- resistance
- 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
- 230000008878 coupling Effects 0.000 abstract 2
- 238000010168 coupling process Methods 0.000 abstract 2
- 238000005859 coupling reaction Methods 0.000 abstract 2
- 238000010894 electron beam technology Methods 0.000 abstract 1
- 238000010079 rubber tapping Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K4/00—Generating pulses having essentially a finite slope or stepped portions
- H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
- H03K4/08—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape
- H03K4/10—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only
- H03K4/12—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth voltage is produced across a capacitor
- H03K4/16—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements vacuum tubes only in which a sawtooth voltage is produced across a capacitor using a single tube with positive feedback through transformer, e.g. blocking oscillator
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Radar Systems Or Details Thereof (AREA)
- Details Of Television Scanning (AREA)
Abstract
497,760. Valve generating circuits. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., and KEMP, R. J. June 26, 1937, No. 17865. [Class 40 (v)] A valve generator of the blocking-oscillator type for producing peaked impulses or sawtooth waves comprises an auto-transformer back coupling with one end of the coil earthed, the tapping point connected to the valve cathode, and the other end connected through a time-constant combination to the control electrode of the valve. The valve is of the electron beam type comprising a cathode 2, Fig. 5, a cylindrical control electrode 3, a cylindrical anode 4, a flat suppressor electrode 5 and a target electrode 6. Aligned slots are formed in the members 3, 4, and 5 and the target 6 is situated beyond these slots. Back coupling between the anode and control electrode circuits is effected by the autotransformer 7, one end of which is earthed at E, the other end connected to the control electrode 3 through a condenser-shunted resistance 8, 9, and the tap 10 to the cathode 2. The anode 4 is connected to earth through a portion of the battery 12, which is also connected to the target 6 through a resistance 13. When current passes momentarily through the valve it is almost immediately cut off by a negative charge accumulating on the control electrode 3, and the valve is blocked until this charge has leaked away through the resistance 8, or until the grid is rendered positive by an external synchronizing pulse, applied either through the coil 15, or across an impedance in series with the coil 7. The output voltage taken from the target 6 thus comprises short peaked impulses, of the form shown in Fig. 2. If a condenser 16 is connected between the target and earth, the voltage across it assumes a saw-tooth form. When a choke coil is substituted for the resistance 13, Fig. 3 (not shown), the output pulses extend both above and below the mean voltage. The Specification states that a square-topped alternating voltage is produced when the tap 10 is situated near the upper end of the coil 7.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB17865/37A GB497760A (en) | 1937-06-26 | 1937-06-26 | Improvements in or relating to electrical oscillators and time base circuits |
| US215729A US2266047A (en) | 1937-06-26 | 1938-06-25 | Electrical oscillators and time base circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB17865/37A GB497760A (en) | 1937-06-26 | 1937-06-26 | Improvements in or relating to electrical oscillators and time base circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB497760A true GB497760A (en) | 1938-12-28 |
Family
ID=10102558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB17865/37A Expired GB497760A (en) | 1937-06-26 | 1937-06-26 | Improvements in or relating to electrical oscillators and time base circuits |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2266047A (en) |
| GB (1) | GB497760A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2495704A (en) * | 1942-11-30 | 1950-01-31 | Standard Telephones Cables Ltd | Constant amplitude wave train generator |
| US20180177376A1 (en) * | 2016-12-27 | 2018-06-28 | Nob Iwas | Device and Method for Cleaning Flat and Semi-Flat Surfaces |
-
1937
- 1937-06-26 GB GB17865/37A patent/GB497760A/en not_active Expired
-
1938
- 1938-06-25 US US215729A patent/US2266047A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2266047A (en) | 1941-12-16 |
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