GB394476A - Electrical apparatus for producing a "saw-tooth" potential - Google Patents
Electrical apparatus for producing a "saw-tooth" potentialInfo
- Publication number
- GB394476A GB394476A GB14241/32A GB1424132A GB394476A GB 394476 A GB394476 A GB 394476A GB 14241/32 A GB14241/32 A GB 14241/32A GB 1424132 A GB1424132 A GB 1424132A GB 394476 A GB394476 A GB 394476A
- Authority
- GB
- United Kingdom
- Prior art keywords
- potential
- grid
- cathode
- condenser
- anode
- 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
- 238000000034 method Methods 0.000 abstract 2
- 229910052788 barium Inorganic materials 0.000 abstract 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- 230000010355 oscillation Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 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
-
- 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
- H03K4/86—Generating pulses having essentially a finite slope or stepped portions having triangular shape having sawtooth shape using as active elements gas-filled tubes or spark-gaps
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
- Apparatuses And Processes For Manufacturing Resistors (AREA)
- Elimination Of Static Electricity (AREA)
Abstract
394,476. Converting. SCHLESINGER, K., 39, Friedrichstrasse, Friedrichshagen, Berlin. May 19, 1932, No. 14241. Convention date, May 20, 1931. [Class 38 (ii).] Apparatus for producing a "saw-tooth" potential for use, for example, in producing the time deflection in cathode-ray oscillographs and for scanning in television apparatus employing Braun tubes comprises a condenser 8 which is charged through a thermionic valve 1 having a cathode 2, an anode 9, and a grid 6 connected to a high positive potential so as to accelerate the electrons before reaching the anode. The anode current is thereby rendered practically independent of variations of anode potential. The condenser 8 is charged so that its potential rises at a uniform rate until it reaches the ignition potential of a glow discharge tube 12, whereupon the condenser is discharged. The grid 6 may have a positive potential of about 1000 volts, a resistance 7 of about a megohm being included in the circuit to limit the grid current to about 1 milliampere. The cathode 2 may be produced by the barium vapour process and may be heated by a filament 3. The hightension supply may be a battery 5 or mains supply apparatus. A synchronizing potential may be applied at 13. The frequency of the charging and discharging cycle may be controlled bv regulating the potential applied to an additional grid electrode between the cathode 2 and grid 6, for example by a variable tapping on a potentiometer resistance connected across a battery. This control may be automatic in accordance, for example, on the intensity of the image element to be transmitted in a television process, as shown in Fig. 3. The fluorescent spot on the screen 19 of a cathode-ray tube 20 is focused by a lens 18 on a film 17, which is capable of being advanced line by line at right-angles to the plane of the drawing. Behind the film 17 is a matte screen 25 and a light-responsive cell 26, which is connected through an amplifier 27 to control the potential of the grid 14 of the thermionic valve 1 through which the condenser 8 is charged. The frequency may be reduced by applying an alternating potential to the grid 14, the bias being chosen so that the ignition voltage of the tube 12 is reached only after a certain number of oscillations.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1931SC094248 DE693511C (en) | 1931-05-21 | 1931-05-21 | Arrangement for the generation of rectilinear rising or falling breakover voltages by charging a capacitor via a grid-controlled charging tube |
DE1932R0085430 DE701421C (en) | 1931-05-21 | 1932-07-16 | Tilting device |
Publications (1)
Publication Number | Publication Date |
---|---|
GB394476A true GB394476A (en) | 1933-06-29 |
Family
ID=32045519
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB14241/32A Expired GB394476A (en) | 1931-05-21 | 1932-05-19 | Electrical apparatus for producing a "saw-tooth" potential |
GB2729/35A Expired GB427168A (en) | 1931-05-21 | 1933-07-14 | Improvements relative to relaxation oscillation generators |
GB19899/33A Expired GB424490A (en) | 1931-05-21 | 1933-07-14 | Improvements relative to relaxation oscillation generators |
Family Applications After (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2729/35A Expired GB427168A (en) | 1931-05-21 | 1933-07-14 | Improvements relative to relaxation oscillation generators |
GB19899/33A Expired GB424490A (en) | 1931-05-21 | 1933-07-14 | Improvements relative to relaxation oscillation generators |
Country Status (5)
Country | Link |
---|---|
US (3) | US2075140A (en) |
DE (2) | DE693511C (en) |
FR (2) | FR737988A (en) |
GB (3) | GB394476A (en) |
NL (3) | NL42659C (en) |
Families Citing this family (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2522957A (en) * | 1942-06-27 | 1950-09-19 | Rca Corp | Triangular signal generator |
GB565099A (en) * | 1943-03-17 | 1944-10-26 | Bertram Morton Hadfield | Improvements in or relating to alternating current generators whose frequency is proportional to and controlled by a direct current |
US2441577A (en) * | 1943-04-17 | 1948-05-18 | Katzin Martin | Automatic volume control means |
US2428926A (en) * | 1943-06-04 | 1947-10-14 | Rca Corp | Modified sweep circuit for cathoderay tubes |
US2453203A (en) * | 1943-06-19 | 1948-11-09 | Ibm | Variable frequency relaxation oscillator |
US2426245A (en) * | 1943-10-09 | 1947-08-26 | Bell Telephone Labor Inc | Time and distance measuring system |
US2423620A (en) * | 1943-10-29 | 1947-07-08 | Baldwin Locomotive Works | Condition responsive apparatus for rotatable members |
US2441246A (en) * | 1943-11-02 | 1948-05-11 | Rca Corp | Modified sweep circuit |
US2489312A (en) * | 1944-01-04 | 1949-11-29 | Us Sec War | Oscilloscope sweep circuit |
US2532503A (en) * | 1944-04-24 | 1950-12-05 | Joseph W Kennedy | Electronic counting circuits |
US2453787A (en) * | 1944-05-23 | 1948-11-16 | Jr George W Downs | Saw-tooth voltage generator |
US2576339A (en) * | 1945-04-03 | 1951-11-27 | John W Gray | Variable rate sweep voltage generator |
US2602888A (en) * | 1945-09-04 | 1952-07-08 | Cutler Hammer Inc | Electronic timer |
US2705901A (en) * | 1946-01-15 | 1955-04-12 | Chalmers W Sherwin | Oscillographic integrator |
US2589477A (en) * | 1946-03-28 | 1952-03-18 | Rca Corp | Oscillation generator system |
US2540016A (en) * | 1948-03-17 | 1951-01-30 | Philco Corp | Electrical system |
US2523328A (en) * | 1948-06-30 | 1950-09-26 | Gen Electric | Cathode-ray mapping system |
US2734137A (en) * | 1950-10-04 | 1956-02-07 | patterson | |
US2735011A (en) * | 1951-02-01 | 1956-02-14 | Oscillating circuit | |
US2701850A (en) * | 1951-02-02 | 1955-02-08 | Philco Corp | Automatic focus control for cathoderay tubes |
US3281717A (en) * | 1961-06-23 | 1966-10-25 | Royson Engineering Company | Pulse generator having repetition rate linearly responsive to trigger signal amplitude |
US3219945A (en) * | 1963-04-22 | 1965-11-23 | Ampex | Voltage controlled variable frequency relaxation oscillator |
US3241086A (en) * | 1963-10-23 | 1966-03-15 | Itt | Wide-frequency-range sweep generator |
US3532968A (en) * | 1967-08-08 | 1970-10-06 | Warwick Electronics Inc | Visual battery condition indicator with relaxation oscillator and variable impedance means |
-
0
- NL NL65992D patent/NL65992B/xx unknown
-
1931
- 1931-05-21 DE DE1931SC094248 patent/DE693511C/en not_active Expired
-
1932
- 1932-05-14 NL NL61229A patent/NL42659C/xx active
- 1932-05-19 GB GB14241/32A patent/GB394476A/en not_active Expired
- 1932-05-20 FR FR737988D patent/FR737988A/en not_active Expired
- 1932-05-21 US US612676A patent/US2075140A/en not_active Expired - Lifetime
- 1932-07-16 DE DE1932R0085430 patent/DE701421C/en not_active Expired
-
1933
- 1933-07-11 US US679866A patent/US2053536A/en not_active Expired - Lifetime
- 1933-07-13 FR FR758478D patent/FR758478A/en not_active Expired
- 1933-07-13 NL NL65992A patent/NL40391C/xx active
- 1933-07-14 GB GB2729/35A patent/GB427168A/en not_active Expired
- 1933-07-14 GB GB19899/33A patent/GB424490A/en not_active Expired
-
1936
- 1936-01-13 US US58952A patent/US2129036A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
FR758478A (en) | 1934-01-18 |
NL65992B (en) | |
DE701421C (en) | 1941-01-16 |
US2129036A (en) | 1938-09-06 |
NL40391C (en) | 1937-04-15 |
US2053536A (en) | 1936-09-08 |
US2075140A (en) | 1937-03-30 |
GB427168A (en) | 1935-04-15 |
GB424490A (en) | 1935-02-14 |
DE693511C (en) | 1940-07-12 |
FR737988A (en) | 1932-12-17 |
NL42659C (en) | 1938-03-15 |
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