US3622871A - Oscillograph with electron beam tuning indicator tube - Google Patents

Oscillograph with electron beam tuning indicator tube Download PDF

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Publication number
US3622871A
US3622871A US868840A US3622871DA US3622871A US 3622871 A US3622871 A US 3622871A US 868840 A US868840 A US 868840A US 3622871D A US3622871D A US 3622871DA US 3622871 A US3622871 A US 3622871A
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Prior art keywords
oscillograph
slots
slotted member
light band
indicator tube
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Expired - Lifetime
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US868840A
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English (en)
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Joachim Seidel
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Individual
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Individual
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R13/00—Arrangements for displaying electric variables or waveforms
    • G01R13/04—Arrangements for displaying electric variables or waveforms for producing permanent records

Definitions

  • the dissecting means comprises a slotted member having equally spaced slots extending in the direction of change in length of the light band, the slots being narrow relative to the width of the light bands, and the slotted member being adapted to cause the slots to sweep across said width.
  • the slotted member is preferably a hollow slctted cylinder of a size to fit over and rotate about the indicator tube, and the spacing between the slots is preferably at least equal to the width of the light band.
  • the so-called sweep for the generation of a two-dimensional image is produced by electronic means.
  • Oscillographs are known in which the sweep is produced by mechanical dissecting means in place of the cathode-ray tube to reduce the cost of the oscillograph.
  • German Pat. No. 364,206 discloses an arrangement, which allows stroboscopic observation of the movement of the light beams by means of a slotted member having equally spaced slots extending in the direction of oscillation and being moved transversely thereof.
  • US. Pat. No. 2,532,731 discloses an oscillograph operating with coverage modulation, in which the light source producing a light band is arranged in the interior of a cylindrical rotary slotted member having a spirally extending slot. The combined use of a magic-band type electron-beam tuning indicator tube and a driven slotted member having equally spaced slots has not as yet been proposed.
  • the slotted member proposed by the invention can, for example, be a flat disc or a hollow cylinder.
  • a hollow cylinder is preferred since, contrary to a flat disc, a cylinder can be provided with parallel slots.
  • FIG. 1 is a side elevation of an electron-beam tuning indicator tube used in the oscillograph of this invention
  • FIG. 2 is an axial section through a hollow cylinder serving as a slotted member and constituting one embodiment of the dissecting means of the oscillograph;
  • FIG. 3 is a side elevation of the hollow cylinder according to FIG. 2, which accommodates a tube according to FIG. I;
  • FIG. 4 is an axial section through another type of hollow slotted cylinder
  • FIG. 5 is a schematic diagram of a device for the separate registration of two different voltages
  • FIGS. 6 and 7 show two embodiments of means providing torsional vibration of the slotted member
  • FIG. 8 is a perspective view of an embodiment of an oscillograph which is combined with a generator model.
  • FIG. 9 is a perspective view of a driving synchronous motor combined with indicating means for showing phase-shifts between different applied voltages.
  • FIG. 1 shows a magic-band type electron-beam tuning indicator tube.
  • the light band of this tube consists of two sections 1 and 2.
  • Numerals 3 and 4 designate the two inner light band edges, the position of which is variable.
  • 'FlG. 2 shows a section through a hollow cylinder including a plurality of parallel slots 5, which have a width much smaller than that of the light band.
  • FIG. 3 illustrates the 1 relative disposition of the electron-beam tuning indicator tube and the hollow cylinder in the oscillograph.
  • the spacing of the slots preferably is equal to the width of the light band of the tube. However, the spacing of the slots can be either larger or smaller than the width of the light band of the tube. If the spacing is larger, only a section of a cyclic process will be registered (so-called sweep magnification); if it is smaller, more than one cycle will be registered.
  • a small modulation of the electron-beam tuning indicator tube should be used to keep the distortions of the oscillogram as small as possible. Since the oscillogram obtained in this case is very small, it is advisable to observe the latter through an optical magnifying arrangement. The curvature of the light layer on the inside of the tube bulb is small relative to the size of the image and does not result in any disturbing effect if the magnification is kept within reasonable limits.
  • the showing of an oscillogram will generally be made by use of the edge of one light band section only, since the oscillograms produced by the two light band edges 3 and 4 are symmetrical.
  • One light band section should therefore preferably be obscured.
  • a slotted member of particular design can be used for the separate registration of the oscillograms of two different voltages. If an oscillograph of the proposed type includes a slotted member having two rows of slots 6 and 7 such as shown in FIG. 4, the edge 3 of the upper light band (FIG. 1) produces one oscillogram and the edge 4 of the lower light band produces the other oscillogram, if the two voltages to be illustrated are alternately applied to the electron-beam tuning indicator tube in properly timed relationship and if the slotted member is so arranged in the oscillograph that one row of slots 6 is aligned with the upper light band (section I in F IG. 1) and the other row of slots 7 is aligned with the lower light band (section 2 in FIG. I) of the tube.
  • the slots of the two rows are relatively staggered by half their spacing, and the spacing of adjacent slots of each row is twice as large as the width of the light band of the tube.
  • the changeover of the oscillograph input between the two voltages to be illustrated, which changeover is necessary to produce two oscillograms, can be achieved by mechanical or photoelectric means. In any event, the changeover must be in synchronism with the motion of the slots.
  • FIG. 5 shows an arrangement which provides separate registration of two oscillograms.
  • numeral 8 designates a motor driving a slotted member 9.
  • 10 indicates a shaft driven by the slotted member 9.
  • the shaft 10 provides a changeover of the oscillograph input 14 between two input terminal pairs 12 and 13 within a switch box II.
  • Numeral l5 designates the voltage supply and amplifier stage for the electron-beam tuning indicator tube designated by numeral 16.
  • An auxiliary device can be mounted on the oscillograph to show Lissajous figures in the oscillogram. If such an auxiliary device provides such a movement of the slotted member that only one slot reciprocates in front of the light band of the tube, the obtained oscillogram will be a Lissajous figure, if a sinusoidal alternating-current voltage is applied to the oscillograph input.
  • the reciprocating movement of one slot can, for example, be obtained by actuating a spring 17, the one end 18 of which is stationary and the other end 19 of which is secured to the slotted member 9 (FIG. 6).
  • Another possibility of providing a reciprocatory movement of the slotted member 9 is given by a rotating shaft 20 coupled to an eccentric 21 (FIG. 7).
  • the oscillograph is completed by an arrangement which permits that various arrangements to be oscillographically tested are connected with their rotatable structural parts to the slotted member by means of a gear.
  • This arrangement is to provide the possibility of mechanically coupling, for example, rotary switches, generator models, slotted discs or sector discs (the latter in combination with light sources and photoelectric structural parts) to the oscillograph.
  • FIG. 8 illustrates an embodiment in which, as an example, a generator model 22 may be coupled to the oscillograph 23.
  • the alternating-current voltage generated by the generator is applied to the oscillograph input through lines 24.
  • This generator model is for example used as a students training instrument and is not described in greater detail, since its construction is generally known.
  • Numeral 8 designates a motor mounted in the oscillograph and driving the slotted member 9 and the generator model 22, toothed wheels 25 transmitting the driving power therebetween.
  • the slotted member may be driven by hand or by a motor. If the slotted member is driven by a synchronous motor, the motor is advantageously mounted in such a manner that its casing may be rotated about its axis of rotation, as indicated by the double-headed arrow in FIG. 9, which shows a synchronous motor to be coupled to the oscillograph from the exterior thereof. With this arrangement, the oscillogram produced by the oscillograph can be laterally displaced, thus permitting the determination of the phase-shift between two alternating-current voltages. To this end, it is merely necessary to mount a dial 28 on the motor support 27 and a pointer 29 on the motor 26, the pointer being pivotable about the axis of rotation of the motor, which axis is indicated by numeral 30.
  • the dial providing with appropriately spaced calibration marks, permits direct reading of the phase-shift between two alternating-current voltages, if one proceeds as follows: the synchronous motor 26 is rotated to adjust a characteristic point of the oscillogram of the first alternatin -current voltage to a vertical calibration mark (or to the rightand or left-hand edge of the light band of the tube). After adjustment of the synchronous motor to this position, the pivotable pointer 29 is aligned with the zero mark of the dial (without angularly displacing the synchronous motor). When the second alternat ing-current voltage is applied to the oscillograph and the second oscillogram is brought into the position of the first one, the pointer 29 will indicate the phase-shift between the two voltages on the dial 28.
  • an oscillograph having a magic-band type electronbeam tuning indicator tube and mechanically driven dissecting means passing thereover and adapted to change the length of the displayed light band of said indicator tube as a function of time
  • said improvement comprising using as said dissecting means a slotted member having equally spaced slots extending in the direction of change in length of said light band, said slots being narrow relative to the width of said light band transversely of the direction of change in length thereof, said slotted member being adapted to cause said slots to sweep across said width.
  • coupling means are connected to said slotted member and are adapted for coupling rotatable structural parts of arrangements which are to be oscillographically tested, said coupling means including a gear having such a transmission ratio that such structural parts carry out one or more revolutions or rotate through an angle, the whole-number multiple of which is a complete revolution, while said slots continue to move through the distance of the spacing of adjacent slots.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Radiation (AREA)
  • Details Of Measuring And Other Instruments (AREA)
  • Particle Accelerators (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
US868840A 1968-10-31 1969-10-23 Oscillograph with electron beam tuning indicator tube Expired - Lifetime US3622871A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681806303 DE1806303B1 (de) 1968-10-31 1968-10-31 Oszillograph mit einer Elektronenstrahl-Abstimmanzeigeroehre

Publications (1)

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US3622871A true US3622871A (en) 1971-11-23

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ID=5712040

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Application Number Title Priority Date Filing Date
US868840A Expired - Lifetime US3622871A (en) 1968-10-31 1969-10-23 Oscillograph with electron beam tuning indicator tube

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US (1) US3622871A (cs)
BE (1) BE740954A (cs)
CA (1) CA928795A (cs)
CH (1) CH514140A (cs)
CS (1) CS151529B2 (cs)
DE (1) DE1806303B1 (cs)
ES (1) ES372947A1 (cs)
FR (1) FR2022014A1 (cs)
GB (1) GB1268256A (cs)
NL (1) NL6916214A (cs)
SE (1) SE351048B (cs)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4184827A (en) * 1975-12-16 1980-01-22 General Electric Company Apparatus for monitoring and controlling the operation of a dual platen press

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1877566A (en) * 1930-10-06 1932-09-13 Westinghouse Electric & Mfg Co Facsimile transmitter
FR1398688A (fr) * 1964-06-16 1965-05-07 Agip Spa Dispositif électro-optique pour l'enregistrement de valeurs physiques variables
US3287639A (en) * 1964-10-08 1966-11-22 Marion L Vail Precision a. c. phase sensor

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE364206C (de) * 1921-10-22 1922-11-18 Wilhelm Geyger Verfahren zur punktweisen Aufnahme von Wechselstromkurven
US2532731A (en) * 1946-12-28 1950-12-05 Bell Telephone Labor Inc Visualization of complex waves
DE1282176B (de) * 1964-03-23 1968-11-07 Rudolf Mackiol Einrichtung zum Sichtbarmachen elektrischer Schwingungen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1877566A (en) * 1930-10-06 1932-09-13 Westinghouse Electric & Mfg Co Facsimile transmitter
FR1398688A (fr) * 1964-06-16 1965-05-07 Agip Spa Dispositif électro-optique pour l'enregistrement de valeurs physiques variables
US3287639A (en) * 1964-10-08 1966-11-22 Marion L Vail Precision a. c. phase sensor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4184827A (en) * 1975-12-16 1980-01-22 General Electric Company Apparatus for monitoring and controlling the operation of a dual platen press

Also Published As

Publication number Publication date
NL6916214A (cs) 1970-05-04
GB1268256A (en) 1972-03-29
CA928795A (en) 1973-06-19
FR2022014A1 (cs) 1970-07-24
CH514140A (de) 1971-10-15
SE351048B (cs) 1972-11-13
BE740954A (cs) 1970-04-01
ES372947A1 (es) 1971-11-16
DE1806303B1 (de) 1970-06-25
CS151529B2 (cs) 1973-10-19

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