US2445933A - Controlled blocking tube oscillator - Google Patents

Controlled blocking tube oscillator Download PDF

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Publication number
US2445933A
US2445933A US574138A US57413845A US2445933A US 2445933 A US2445933 A US 2445933A US 574138 A US574138 A US 574138A US 57413845 A US57413845 A US 57413845A US 2445933 A US2445933 A US 2445933A
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Prior art keywords
tube
condenser
blocking tube
tube oscillator
frequency
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Expired - Lifetime
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US574138A
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Beste Harold Edward
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Allen B du Mont Laboratories Inc
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Allen B du Mont Laboratories Inc
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    • 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

Definitions

  • This invention is for a blocking tube oscillator having associated therewith means to control its repetition rate.
  • the blocking tube oscillator is so controlled that the repetition rate of its firing is synchronized with a desired "frequency. It can be made to fire at the same rate and at any integral multiple or divisor of the said frequency.
  • the frequencies used for synchronizing the blocking tube oscillator may vary over a wide range.
  • circuits alread known in this art are used and so combined as to produce the desired result.
  • One of these circuits is that of a blocking tube oscillator and the other one is that of a sine wave frequency multiplier which is used to control the frequency of the blocking tube oscillator.
  • Reference character I indicates a pentode having its control grid coupled by condenser 2 to a signal source, not shown, and being provided with a grid leak resistor 3.
  • the cathode of this tube is grounded. Its screen grid is connected to a source of positive potential in the usual way.
  • the plate of tube l is connected to this source of positive potential through a tunable circuit consisting of a primary 4' of transformer 4 andvariable condenser 5 in parallel.
  • the secondary 4 of transformer 4 is connected in parallel with a variable condenser 6, one end of this parallel combination being connected to ground. The other end thereof is connected by lead I to the cathode 8 of triode 9.
  • the plate of this triode is connected through the primary ill of transformer I and load resistor II to the same source of positive potential to which the plate of tube l is connected.
  • the usual filter I2 is provided in this circuit and a similar filter I3 is provided in the circuit between a source of positive potential and the screen grid of tube I
  • One end of the secondary IU" of transformer I0 is connected to the grid oi the tube 9 and the other end of this secondary is connected to ground through a circuit consisting of condenser l4 and variable resistor IS in parallel.
  • the output from the device which is a frequency which can be the same or a multiple of that appearing on the grid of tube I, is coupled by condenser l6 and lead ii to the place of use.
  • Any suitable frequency such as that of a sixty cycle power line, is applied through condenser 2 ii to the grid of tube l
  • the time constant of the condenser i l and resistance I5 is made such that it is the same as or any integral division of the frequency applied to the cathode 8.
  • the blocking tube oscillator 9 then starts to conduct during the times when the signal applied to the cathode 8 is well into its negative excursion, thus unbiasing the tube 9.
  • the time constant of resistance l5 and condenser I4 is adjusted to be the same frequency as the tuned circuit 4"-6, or an integral division thereof.
  • a vacuum tube having its cathode grounded and having a signal lead connected to its control grid, an inductance and condenser in parallel in its plate circuit, an inductance associated with said 30 first named inductance to provide a transformer, a condenser in parallel with said second named inductance, a vacuum tube to the cathode of which one side of said last named condenser is connected, the other side of said last named. condenser being connected to ground, said last named vacuum tube having a resistance and the primary of a transformer in series in its plate circuit, one end of the secondary of said! last named transformer being connected to the grid of said last named tube and the other end thereof to one end of a circuit having a time constant and having its other end grounded.
  • a lead for the 5 UNITE output of said device is connected between said D STATES PATENTS resistance and said transformer primary that are Number Name Date msenes 1,896,534 Alexanderson Feb. 7, 1933 8.
  • a lead hav- 2,193,850 Adrien r. 1 1940 ing a condenserthrein for the output of said de- 10 2,230,546 he F b. 4, 1941 vice is connected between said resistance and said 2,297,742 ll Oct. 6, 1942 V transformer primary,that are in series. 2 53 297 :Bfl Sept. 1944 2,396,439. Schlesinger 'Mar. 12, 1946 HAROLD EDWARD .BESTE. 2.415567 'Schoenteld pm 11.

Description

July 1948- H. E. BESTE 2,445,933
CONTROLLED BLOCKING TUBE OSCILLATOR Filed Jan. 23, 1945 IN VEN TOR.
H TFORNEY Patented July 21,
CONTROLLED BLOCKING TUBE OSCILLATOR Harold Edward Beste, East Rutherford, N. J., as-
signor to Allen B. Du Mont Laboratories, Inc., I Passaic, N. J a corporation of Delaware Application January 23, 1945, Serial No. 574,138
8 Claims.
I This invention is for a blocking tube oscillator having associated therewith means to control its repetition rate. In carrying out the invention, the blocking tube oscillator is so controlled that the repetition rate of its firing is synchronized with a desired "frequency. It can be made to fire at the same rate and at any integral multiple or divisor of the said frequency. The frequencies used for synchronizing the blocking tube oscillator may vary over a wide range.
Two sorts of circuits alread known in this art are used and so combined as to produce the desired result. One of these circuits is that of a blocking tube oscillator and the other one is that of a sine wave frequency multiplier which is used to control the frequency of the blocking tube oscillator.
The invention may be understood from the present description in connection with the ac companying drawing, in which:
Reference character I indicates a pentode having its control grid coupled by condenser 2 to a signal source, not shown, and being provided with a grid leak resistor 3. The cathode of this tube is grounded. Its screen grid is connected to a source of positive potential in the usual way. The plate of tube l is connected to this source of positive potential through a tunable circuit consisting of a primary 4' of transformer 4 andvariable condenser 5 in parallel. The secondary 4 of transformer 4 is connected in parallel with a variable condenser 6, one end of this parallel combination being connected to ground. The other end thereof is connected by lead I to the cathode 8 of triode 9. The plate of this triode is connected through the primary ill of transformer I and load resistor II to the same source of positive potential to which the plate of tube l is connected. The usual filter I2 is provided in this circuit and a similar filter I3 is provided in the circuit between a source of positive potential and the screen grid of tube I One end of the secondary IU" of transformer I0 is connected to the grid oi the tube 9 and the other end of this secondary is connected to ground through a circuit consisting of condenser l4 and variable resistor IS in parallel.
The output from the device, which is a frequency which can be the same or a multiple of that appearing on the grid of tube I, is coupled by condenser l6 and lead ii to the place of use.
The operation is as follows: Any suitable frequency, such as that of a sixty cycle power line, is applied through condenser 2 ii to the grid of tube l The inductance 4, through which the source of positive potential is connected to the plate of tube l, is tuned by variable condenser 5 to a multiple frequency of that applied to the grid of tube I, and the inductance 4" is tuned by variable condenser 6 to the same fre quency so that this tuned multiple frequency is applied to the cathode 8 of tube 9.
The time constant of the condenser i l and resistance I5 is made such that it is the same as or any integral division of the frequency applied to the cathode 8. The blocking tube oscillator 9 then starts to conduct during the times when the signal applied to the cathode 8 is well into its negative excursion, thus unbiasing the tube 9. The time constant of resistance l5 and condenser I4 is adjusted to be the same frequency as the tuned circuit 4"-6, or an integral division thereof.
What is claimed is:
1. In a device of the character described, a vacuum tube having its cathode grounded and having a signal lead connected to its control grid, an inductance and condenser in parallel in its plate circuit, an inductance associated with said 30 first named inductance to provide a transformer, a condenser in parallel with said second named inductance, a vacuum tube to the cathode of which one side of said last named condenser is connected, the other side of said last named. condenser being connected to ground, said last named vacuum tube having a resistance and the primary of a transformer in series in its plate circuit, one end of the secondary of said! last named transformer being connected to the grid of said last named tube and the other end thereof to one end of a circuit having a time constant and having its other end grounded.
2. The device of claim 1 in which said first named condenser is variable.
45 3. The device of claim 1 in which said second named condenser is variable.
4. The device of claim 1 in which said time constant circuit is variable.
5. The device of claim 1 in which the resistance 50 in said time constant circuit is variable.
6. The device of claim 1 in which the time constant of said last named circuit is adjusted REFERENCES CITED to the frequency f aid inductanc and con- The following references are of record in the denser that areinparallel. file of this P ent:
7. The device of claim 1 in which a lead for the 5 UNITE output of said device is connected between said D STATES PATENTS resistance and said transformer primary that are Number Name Date msenes 1,896,534 Alexanderson Feb. 7, 1933 8. The device of claim 1 in which a lead hav- 2,193,850 Adrien r. 1 1940 ing a condenserthrein for the output of said de- 10 2,230,546 he F b. 4, 1941 vice is connected between said resistance and said 2,297,742 ll Oct. 6, 1942 V transformer primary,that are in series. 2 53 297 :Bfl Sept. 1944 2,396,439. Schlesinger 'Mar. 12, 1946 HAROLD EDWARD .BESTE. 2.415567 'Schoenteld pm 11.
US574138A 1945-01-23 1945-01-23 Controlled blocking tube oscillator Expired - Lifetime US2445933A (en)

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2547890A (en) * 1948-05-25 1951-04-03 Raytheon Mfg Co Electrical circuits
US2578643A (en) * 1947-02-28 1951-12-11 Wurlitzer Co Telemetering system
US2591660A (en) * 1947-11-08 1952-04-01 Radio Television Inst Inc Stabilized electrical synchronizing system
US2622200A (en) * 1945-09-04 1952-12-16 Herman S Pierce Therapeutic device
US2632853A (en) * 1947-11-08 1953-03-24 Radio Television Inst Inc Electrical synchronizing system
US2656467A (en) * 1950-08-21 1953-10-20 North American Aviation Inc Crystal oscillator
US2656465A (en) * 1948-05-12 1953-10-20 Zenith Radio Corp Synchronizing system
US2670437A (en) * 1948-01-10 1954-02-23 Morrison Montford Electronic tube oscillation system
US2704812A (en) * 1949-05-26 1955-03-22 Gen Electric Synchronizing system
US2758208A (en) * 1952-12-23 1956-08-07 Int Standard Electric Corp Electric frequency dividers
US2958049A (en) * 1956-02-13 1960-10-25 Georgia Tech Res Inst Synchronized oscillator with electron-coupled reference timing source
US3235812A (en) * 1961-10-04 1966-02-15 Hazeltine Research Inc Apparatus for generating an electrical signal

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1896534A (en) * 1927-05-13 1933-02-07 Gen Electric Electrical system
US2193850A (en) * 1937-04-24 1940-03-19 Telefunken Gmbh Oscillation generator
US2230546A (en) * 1938-03-03 1941-02-04 Telefunken Gmbh Circuit for the amplification of ultra-high frequencies
US2297742A (en) * 1941-07-15 1942-10-06 Du Mont Allen B Lab Inc Blocking tube oscillator for television
US2358297A (en) * 1940-07-31 1944-09-19 Rca Corp Blocking oscillator
US2396439A (en) * 1942-03-16 1946-03-12 Rca Corp Electron tube circuits
US2415567A (en) * 1944-12-02 1947-02-11 Rca Corp Frequency counter circuit

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1896534A (en) * 1927-05-13 1933-02-07 Gen Electric Electrical system
US2193850A (en) * 1937-04-24 1940-03-19 Telefunken Gmbh Oscillation generator
US2230546A (en) * 1938-03-03 1941-02-04 Telefunken Gmbh Circuit for the amplification of ultra-high frequencies
US2358297A (en) * 1940-07-31 1944-09-19 Rca Corp Blocking oscillator
US2297742A (en) * 1941-07-15 1942-10-06 Du Mont Allen B Lab Inc Blocking tube oscillator for television
US2396439A (en) * 1942-03-16 1946-03-12 Rca Corp Electron tube circuits
US2415567A (en) * 1944-12-02 1947-02-11 Rca Corp Frequency counter circuit

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2622200A (en) * 1945-09-04 1952-12-16 Herman S Pierce Therapeutic device
US2578643A (en) * 1947-02-28 1951-12-11 Wurlitzer Co Telemetering system
US2591660A (en) * 1947-11-08 1952-04-01 Radio Television Inst Inc Stabilized electrical synchronizing system
US2632853A (en) * 1947-11-08 1953-03-24 Radio Television Inst Inc Electrical synchronizing system
US2670437A (en) * 1948-01-10 1954-02-23 Morrison Montford Electronic tube oscillation system
US2656465A (en) * 1948-05-12 1953-10-20 Zenith Radio Corp Synchronizing system
US2547890A (en) * 1948-05-25 1951-04-03 Raytheon Mfg Co Electrical circuits
US2704812A (en) * 1949-05-26 1955-03-22 Gen Electric Synchronizing system
US2656467A (en) * 1950-08-21 1953-10-20 North American Aviation Inc Crystal oscillator
US2758208A (en) * 1952-12-23 1956-08-07 Int Standard Electric Corp Electric frequency dividers
US2958049A (en) * 1956-02-13 1960-10-25 Georgia Tech Res Inst Synchronized oscillator with electron-coupled reference timing source
US3235812A (en) * 1961-10-04 1966-02-15 Hazeltine Research Inc Apparatus for generating an electrical signal

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