US2418121A - Impulse producing oscillator - Google Patents

Impulse producing oscillator Download PDF

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Publication number
US2418121A
US2418121A US466561A US46656142A US2418121A US 2418121 A US2418121 A US 2418121A US 466561 A US466561 A US 466561A US 46656142 A US46656142 A US 46656142A US 2418121 A US2418121 A US 2418121A
Authority
US
United States
Prior art keywords
oscillator
impulse
anode
energizing
amplitude
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
Application number
US466561A
Other languages
English (en)
Inventor
Ross B Hoffman
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.)
STC PLC
Federal Telephone and Radio Corp
Original Assignee
Standard Telephone and Cables PLC
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
Priority to BE476640D priority Critical patent/BE476640A/xx
Priority to US452901A priority patent/US2416367A/en
Priority to US466561A priority patent/US2418121A/en
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB19414/43A priority patent/GB579673A/en
Publication of US2418121A publication Critical patent/US2418121A/en
Application granted granted Critical
Priority to FR953820D priority patent/FR953820A/fr
Priority to FR57666D priority patent/FR57666E/fr
Priority to CH262128D priority patent/CH262128A/de
Priority to ES0182202A priority patent/ES182202A1/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/78—Generating a single train of pulses having a predetermined pattern, e.g. a predetermined number

Definitions

  • Ellis invention relates to radio systems and more particularly to generation of impulses.
  • One of the objects of this invention is to provide a method and means for effecting impulse generation of substantially evenly-timed occurrence with respect to the application of energizing potentials, and wherein the amplitude of recurring impulses thus generated are substantially constant.
  • Another object of this invention is to provide an improved impulse generator wherein the efficiency of the generator as regards the amplitude of generated impulses is greatly improved over similar systems heretofore proposed.
  • anode potentials applied to an oscillator operated merely to bring the oscillator from a point of substantially stable quiescent equilibrium to a point of highly unstable equilibrium but did not provide any excitation to initiate the pulse oscillations. It is believed that the pulse oscillation is initiated after an anode potential is applied to the oscillator by the presence of random voltage due to thermal or circuit noise conditions and that the oscillation impulse buildup from a very small value in an exponential fashion. It is believed that the amplitude of random fluctuations of voltage present at the instant anode potential is supplied to the oscillator controls the point of oscillation build-up on the exponential curve.
  • the buildup is initiated at substantially zero value on the exponential curve. If the fluctuation voltage is of some more appreciable amplitude, the buildup, is initiated at a point further along theexponential curve and the 'resulting' ulse envelope for the same energizing potential will be larger, and the wave front thereof will occur in time relation in advance of the Wave front of a pulse envelope initiated further down the exponential curve.
  • This has a-catalyzing eiiect in that with my invention I am able to efiect consistently aquick impulse envelope build-up and one in which the ampll tude is greater for the same anode-energizing potential.
  • the wave fronts of the impulses thus produced are caused to have substantially even time relationship with respect to the wave fronts of the anode energizing potentials.
  • time modulation communication equipment may be ofthe type generally disclosed'in U. S. Patents Nos. 2,266,401 and 2,256,336 and copending applications of Emile Labin, Serial No. 386,282, filed April 1, 1941; Serial No. 406,499, filed August 12, 1941: and Serial No. 449,595, filed July 3, 1942.
  • radio detection systems to which my invention is applicable are disclosed in the c'opendingapplications of H. Busignies, Serial No. 381,640, filed March 4, 1941. and E. Labin,,Seria1 No. 400,259, filed Junel28, 1941.
  • Fig. 1 is a schematic illustration of an impulse generator in accordance withmy invention
  • Fig. 2' is a view in perspective of a spark gap device
  • Fig. 3 is a graphical illustration of the im-' by the modulator 3
  • a radio frequency oscillator comprising two vacuum tubes l6, l2, connected in push-pull arrangement. These tubes comprise plates l4, I6, respectively, connected together by a resonant linear circuit l8; grids 20, 22 respectively, connected together by a resonant linear circuit 24; and cathodes 26, 28 respectively, connected together by a resonant linear circuit 36.
  • the resonant linear circuits, I8, 24 and 30 may be of any known type adjustable to have an electrical length of some multiple of a one quarter wavelength, and may be tuned by known means to the frequency desired. It Will be understood, of course, that the oscillator circuit could have tank circuits of lumped inductances and capacities. For ultra high frequency operation, however, tuned resonant linear circuits are preferable.
  • for producing high voltage pulses is connected by means of a plate lead 32 to the midpoint of the oscillator plate circuit l8. From this plate lead 32 is connected 2.
  • variable spark gap device 34 to the remote side of which is attached a conductor 36 having a length approximately equal to one quarter of the wavelength at which the oscillator is resonant.
  • the device comprises an insulated base 56 on which is mounted two metal binding posts 52, 56. Threaded through each of said posts are metal screws 62, 64 respectively, which carry coaxially therewith two carbon cylinders 58, 60 such that the carbons may be moved coaxially with respect to each other by manipulation of the metal screws. Metal screws 62, 64 may be held from turning by two set screws 68, 70 respectively, threaded down into the tops of their respective binding posts. Near the base of binding posts 52, 56 are cylindrical holes l2, 14 which permit the insertion of conductors. Set screws l6, 18 are threaded into the bottom of said binding posts at right angles to the conductor holes so as to hold the conductors in place.
  • Fig. 3 I have indicated at 80 random voltage fluctuation which'may be present in the oscillator circuit.
  • the oscillator when subjected to an anode energizing potential 82 will start to oscillate and build-up an impulse envelope such as indicated by the impulses B4 and 85 depending upon the amplitude of the random fluctuation 80 at the instant of application of the potential 82.
  • the envelope 84 which is assumed was initiated by a low amplitude random fluctuation, is of smaller amplitude than impulse 85 which is assumed to have been initiated by a voltage fluctuation of greater amplitude..
  • I produce impulses whichare substantially constant in amplitude and in which the wave fronts occur at substantially the same time relation With respect to th energizing wave fronts of the energizin potentials.
  • the spark gap between the carbons 58 and 60 will break down and an arc will be formed. The are that is thus formed will excite the quarter wavelength conductor 36 and cause it to oscillate at the frequency to which it is resonant.
  • This oscillation in the conductor 36 will be instantaneously radiated to the resonant linear circuits of the oscillator so that voltages will be induced therein thus causing radio frequency oscillations to begin immediately.
  • This excitation radiation from the conductor 36 induces oscillation in the oscillator circuit at or immediately following the application thereto of the energizing potential 82.
  • pulses build-up irregu larly, depending on many factors one of which is the amplitude of random voltage present in the circuit due to random circuit noise. Due to the fact that the spark gap breaks down consistently at the same voltage, each time a pulse potential from the modulator is applied to the anode input IS, a uniformity of pulse build-up is effected. In addition, I have found that the shock excitation from conductor 36 greatly improves the efliciency of the circuit and thus produces pulses of greater amplitude, that is, greater peak power.
  • the method of stabilizing the impulse generation of an oscillator having an anode input which includes the steps of developing recurring energizing potentials, applying these recurring energizing potentials to the anode input of the oscillator to effect for each energizing potential the generation of an impulse, exciting the oscillator with a second, excitation voltage by radiating energy to the oscillator, and controlling the radiation in accordance with the development of each recurring energizing potential, whereby said oscillator is excited by said excitation voltage substantially simultaneously with the application of each recurring energizing potential.
  • An impulse generator comprising an oscillator, an anode input therefor, means to apply energizing potentials to said input to initiate oscillation for production of impulses, and means readily excitable to resonance in response to application of said potentials to said input, said readily excitable means being so disposed with respect to said oscillator that radiation therefrom establishes in the circuit of said oscillator an excitation of substantial amplitude substantially simultaneously wtih the application of the energizing potential, thereby efiecting for successively applied similar potentials substantially identical impulse oscillations.
  • the readily excitable means includes a resonatable element of a length substantially equal to one quarter of the wavelength at which said oscillator is resonant.
  • the readily excitable means includes a resonatable element of a length substantially equal to one quarter of the wavelength at which said oscillator is resonant, and a spark gap adapted to be quickly broken down by said potentials.
  • An impulse generator including, in combination, an oscillator including a pair of electron discharge devices, each having an anode, a cathode and a grid, a first linear resonant circuit means connected to the anodes, a second linear resonant circuit means connected to said cathodes and a third linear resonant circuit means connected to said grids, a source of recurring energizing potentials, means applying said source to one of said linear circuits, a resonant radiating device positioned within excitable range of said linear resonant circuits, and means energizing said radiating device from said recurring potential source.

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  • Ultra Sonic Daignosis Equipment (AREA)
  • Particle Accelerators (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
US466561A 1942-07-30 1942-11-23 Impulse producing oscillator Expired - Lifetime US2418121A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
BE476640D BE476640A (fr) 1942-11-23
US452901A US2416367A (en) 1942-07-30 1942-07-30 Pulse generating system
US466561A US2418121A (en) 1942-11-23 1942-11-23 Impulse producing oscillator
GB19414/43A GB579673A (en) 1942-11-23 1943-11-19 Means for pulsing radio frequency oscillators
FR953820D FR953820A (fr) 1942-11-23 1947-08-06 Systèmes générateurs d'impulsions
FR57666D FR57666E (fr) 1942-11-23 1947-08-06 Systèmes générateurs d'impulsions
CH262128D CH262128A (de) 1942-11-23 1947-09-22 Verfahren zur Stabilisierung der Impulserzeugung eines Hochfrequenz-Röhrenoszillators und Impulsgenerator zur Durchführung des Verfahrens.
ES0182202A ES182202A1 (es) 1942-11-23 1948-02-09 Un sistema generador de impulsos

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US466561A US2418121A (en) 1942-11-23 1942-11-23 Impulse producing oscillator

Publications (1)

Publication Number Publication Date
US2418121A true US2418121A (en) 1947-04-01

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ID=23852229

Family Applications (1)

Application Number Title Priority Date Filing Date
US466561A Expired - Lifetime US2418121A (en) 1942-07-30 1942-11-23 Impulse producing oscillator

Country Status (6)

Country Link
US (1) US2418121A (fr)
BE (1) BE476640A (fr)
CH (1) CH262128A (fr)
ES (1) ES182202A1 (fr)
FR (2) FR953820A (fr)
GB (1) GB579673A (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2446829A (en) * 1946-02-21 1948-08-10 Hazeltine Research Inc Modulated-signal generator
US2498495A (en) * 1943-01-23 1950-02-21 Gen Electric Method and apparatus for producing rapid build-up of radio frequency oscillations
US2524175A (en) * 1945-06-28 1950-10-03 Mini Of Supply Keying of high-frequency oscillators
US2534098A (en) * 1945-06-23 1950-12-12 Gen Electric Ultra high frequency wave generator
US2546952A (en) * 1946-02-27 1951-03-27 Raytheon Mfg Co Electrical system
US2565112A (en) * 1947-12-27 1951-08-21 Westinghouse Electric Corp Oscillator mode suppression
US2856599A (en) * 1948-04-22 1958-10-14 Gen Precision Lab Inc Pulsed magnetron system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1695042A (en) * 1923-08-15 1928-12-11 Western Electric Co High-efficiency discharge-device system
US2057170A (en) * 1932-10-07 1936-10-13 Rca Corp Oscillation generation

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1695042A (en) * 1923-08-15 1928-12-11 Western Electric Co High-efficiency discharge-device system
US2057170A (en) * 1932-10-07 1936-10-13 Rca Corp Oscillation generation

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2498495A (en) * 1943-01-23 1950-02-21 Gen Electric Method and apparatus for producing rapid build-up of radio frequency oscillations
US2534098A (en) * 1945-06-23 1950-12-12 Gen Electric Ultra high frequency wave generator
US2524175A (en) * 1945-06-28 1950-10-03 Mini Of Supply Keying of high-frequency oscillators
US2446829A (en) * 1946-02-21 1948-08-10 Hazeltine Research Inc Modulated-signal generator
US2546952A (en) * 1946-02-27 1951-03-27 Raytheon Mfg Co Electrical system
US2565112A (en) * 1947-12-27 1951-08-21 Westinghouse Electric Corp Oscillator mode suppression
US2856599A (en) * 1948-04-22 1958-10-14 Gen Precision Lab Inc Pulsed magnetron system

Also Published As

Publication number Publication date
ES182202A1 (es) 1948-04-01
GB579673A (en) 1946-08-12
CH262128A (de) 1949-06-15
BE476640A (fr)
FR953820A (fr) 1949-12-14
FR57666E (fr) 1953-05-04

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