GB394476A - Electrical apparatus for producing a "saw-tooth" potential - Google Patents

Electrical apparatus for producing a "saw-tooth" potential

Info

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
Application number
GB14241/32A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB394476A publication Critical patent/GB394476A/en
Expired legal-status Critical Current

Links

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)
  • Elimination Of Static Electricity (AREA)
  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
  • Apparatuses And Processes For Manufacturing Resistors (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.
GB14241/32A 1931-05-21 1932-05-19 Electrical apparatus for producing a "saw-tooth" potential Expired GB394476A (en)

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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
FR737988A (en) 1932-12-17
FR758478A (en) 1934-01-18
NL65992B (en)
GB427168A (en) 1935-04-15
NL42659C (en) 1938-03-15
DE701421C (en) 1941-01-16
GB424490A (en) 1935-02-14
US2129036A (en) 1938-09-06
NL40391C (en) 1937-04-15
US2053536A (en) 1936-09-08
US2075140A (en) 1937-03-30
DE693511C (en) 1940-07-12

Similar Documents

Publication Publication Date Title
GB394476A (en) Electrical apparatus for producing a "saw-tooth" potential
US1933219A (en) System for deflecting electron passages in cathode ray tubes
US2074495A (en) Circuits for cathode-ray tubes
US2234806A (en) Method of electronoptically enlarging images
US2199278A (en) Electron discharge device
GB387536A (en) Television method
US2147760A (en) Television apparatus
US2418425A (en) Self-synchronized saw-tooth generator
US2415842A (en) Electrooptical device
GB402181A (en) Improvements in or relating to television and the like systems
US2285043A (en) Television receiver
US2180364A (en) Cathode ray sweep circuits
GB803221A (en) Improvements relating to electron guns
US2434196A (en) Focus control for television image tubes
GB501058A (en) Improvements in or relating to cathode ray tubes
US2483149A (en) Television film projection with synchronized discharge lamp
US2098598A (en) Synchronizing system
US2651674A (en) Television transmission from intermittent film by means of pulsed pickup tube
US2055611A (en) Saw-tooth wave form current and voltage generating device
US2287408A (en) Modulating and compensating apparatus
US2961574A (en) Image signal noise suppression
US2290377A (en) Anode modulated tube
US2237896A (en) Electronic device
US2297547A (en) Television power supply
US2700066A (en) Television transmitter for use with low illumination