US3688226A - Tubular electronic reactor component having an embedded electrode - Google Patents

Tubular electronic reactor component having an embedded electrode Download PDF

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Publication number
US3688226A
US3688226A US55854A US3688226DA US3688226A US 3688226 A US3688226 A US 3688226A US 55854 A US55854 A US 55854A US 3688226D A US3688226D A US 3688226DA US 3688226 A US3688226 A US 3688226A
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US
United States
Prior art keywords
layer
electrode
tubular
sheet
cylinder
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
US55854A
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English (en)
Inventor
Frank G Mezey
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.)
American Technical Ceramics Corp
VICTOR INSETTA
Original Assignee
VICTOR INSETTA
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Publication date
Application filed by VICTOR INSETTA filed Critical VICTOR INSETTA
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Publication of US3688226A publication Critical patent/US3688226A/en
Assigned to AMERICAN TECHNICAL CERAMICS CORP. reassignment AMERICAN TECHNICAL CERAMICS CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: PHASE INDUSTRIES, INC., A NY. CORP.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F5/00—Coils
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type 
    • H01F17/0006—Printed inductances
    • H01F17/0033—Printed inductances with the coil helically wound around a magnetic core
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F21/00—Variable inductances or transformers of the signal type
    • H01F21/02—Variable inductances or transformers of the signal type continuously variable, e.g. variometers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H5/00—One-port networks comprising only passive electrical elements as network components
    • H03H5/02—One-port networks comprising only passive electrical elements as network components without voltage- or current-dependent elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type 
    • H01F17/0006—Printed inductances
    • H01F2017/004—Printed inductances with the coil helically wound around an axis without a core
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/43—Electric condenser making
    • Y10T29/435—Solid dielectric type

Definitions

  • An electronic reactor component is comprised of a tu- 51 Int. Cl.
  • a helical metallic layer may be bounded to theiexteri- 2,998,840 9/1961 Davis 333/31 C or of the dielectric body to constitute an inductor.
  • This invention concerns improvements in electronic components, and more particularly concerns both a reactance component having a tubular dielectric member with an electrode embedded therein, and a method of fabricating such a reactance component.
  • the present invention is directed to overcoming the above and other difl'rculties, disadvantages and objections of prior tubular reactors, and providing an improved reactance component and a new method of making such a component.
  • an extremely thin metallic layer is deposited on a thin, flexible dielectric sheet.
  • the sheet is spirally rolled on a rod or cylindrical mandrel so that metallic layer assumes a spiral form.
  • the dielectric sheet is then fired, plasticized or set to form a homogeneous tube with the metallic layer embedded therein and defining a tubular electrode.
  • the reactance component thus formed can then be assembled as a tubular stator with a rotor to form a trimmer capacitor.
  • the invention is especially intended for forming a 4 miniature, adjustable capacitor, however, it is also adapted to be made into a miniature inductancecapacitance circuit, or a tuned L-C circuit.
  • Another object of the present invention is to provide a solid state reactor which is cylindrical in form and has a stator with a metallic electrode embedded therein.
  • Still another object of the present invention is to provide a method for manufacturing a solid state reactor of the type hereinabove mentioned.
  • FIG. 1 is a longitudinal sectional view of a capacitor assembly embodying the invention
  • FIG. 2 is an enlarged cross sectional view taken along line 2-2 of FIG. 1;
  • FIG. 3 is an oblique plan view of a dielectric sheet and metallic layer shown at one stage in the process of making a tubular reactance component
  • FIG. 4 is a longitudinal sectional view taken along line 4-4 of FIG. 3;
  • the bushing 22 may be tapered and cut cir- FIG. 5 rs a plan view of a tubular reactance component shown at another stage in the process of fabrication thereof;
  • FIG. 6 is a cross sectional view taken along line 6-6 of FIG. 5;
  • FIG. 7 is a longitudinal sectional view taken along line 7-7 of FIG. 6;
  • FIG. 8 is an oblique plan view similar to FIG. 3, showing another dielectric sheet and metallic layers used in forming a tubular L-C reactor component;
  • FIG. 9 is a plan view of the tubular L-C reactor component
  • FIG. 10 is an enlarged fragmentary longitudinal sectional view taken along line 10-10 of FIG. 9;
  • FIG. 11 is a cross sectional view taken along line 11-11 ofFIG. l0;
  • FIG. 12 is a diagram of the equivalent circuit of th reactor of FIGS. 10 and 1 1.
  • FIGS. 1 and 2 there is illustrated in FIGS. 1 and 2 a capacitor assembly generally designated as reference numeral 20 of the panel mounting type.
  • the capacitor 20 has an externally threaded bushing 22 which may be inserted in a hole in a panel and secured thereto by a nut 24 which is threaded on the bushing.
  • the bushing has an annular flange 26 and a dielectric hollow cylindrical reactor generally designated by reference numeral 50 which embodies the invention.
  • the reactor 50 is secured to the flange 26 by a metal band 30 held by solder 32.
  • Within the reactor 50 is a spirally embedded electrode 54 and across the open end of reactor 50 is an electrically'conductive metallic end cap 62 which is in contact with the embedded electrode 54.
  • the cylindrical reactor 50 and the electrode 34 form a stationary part or stator of the capacitor assembly 20.
  • an electrically conductive metallic piston 28 Slidably mounted inside the reactor cylinder 50 is an electrically conductive metallic piston 28.
  • the piston 28 at its right end, as view in FIG. 1, is in circumferential contact with the inner wall of the hollow cylindrical reactor 50.
  • a force fitted plug 55 which is secured to an axial threaded stud 56 engaged in a threaded axial bore 58 of the bushing 22.
  • the piston 28 is advanced axially in reactor 50 by turning the stud 56 which has a slotted outer end 61 which may be engaged by a screwdriver.
  • a nut 60 on I the stud may be tightened to lock the stud and thereby prevent longitudinal motion of the movable piston 28.
  • One end of a wire 65 may be connected by solder 63 to a terminal 64 on the bushing 22. It will be apparent that axial movement of the piston 28 with respect to electrode 54 varies the capacitance and capacitive reactance of the assembly 20.
  • the capacitor assembly 20 as shown in FIGS. 1 and 2 may be made in a very small size for use as a trimmer capacitor.
  • the assembly may be made with a very large capacitance since the wall thickness between the embedded electrode and the piston 28 may be one-tenth as thick as the thickness between the inner and outer diameters of the reactor 50.
  • FIGS. 3-7 illustrate the steps in the fabrication of the cylindrical or tubular reactor 50.
  • a rectangular dielectric sheet 79 which may be comprised of a green, unfired vitreous material, or a ceramic, glass, thermoplastic, or unset thermosetting plastic material, and upon which is applied a thin metallic film 54.
  • This film may be silver, gold or the like applied by evaporation or other suitable techniques known in the art.
  • the film 54' may have a thickness of about 0.3 mil while sheet 70 may have a thickness as small as 1.0 mil, whereby the wall thickness of the reactor 50 may be times thicker than the thickness of sheet 70.
  • Sheet 70 and film 54' are quite flexible and may be wrapped spirally around a cylindrical rod or mandrel 75 shown in FIGS.
  • the metallic film 54 is embedded between inner and outer turns of the sheet 70 and preferably defines a single spiral turn best shown in FIG. 6. It will be noted that the film 54 is initially disposed at one edge 73 of sheet 70 and is spaced from lateral edges 74, 76 but may be closer to the edge 76. After the sheet and film are wrapped around the rod 75 as shown in FIG. 7, it may be fired to integrate the several turns of the sheet 70 and form the tubular reactor 50 shown in FIG. 1 and 2. The wrapped sheet on the mandrel may be fired in such a way as to eliminate the edge 76 of the sheet shown in I FIG. 6, and be truly round as shown in FIG. 2, i.e., using a tubular fixture. Alternatively, after the firing the outer diameter may be ground to provide a smooth outer cylindrical surface. In any case after the firing is completed the cylinder will be a right cylindrical body with the electrode 54 embedded therein.
  • FIG. 8 shows another thin, flexible, dielectric sheet 80 onto which is applied a metallic layer 82 extending for the entire width of the sheet between edges 84, 86 but spaced from lateral edges 87 88.
  • This sheet 80 may be wound on a rod or mandrel like the rod 75 so that the layer 82 assumes a spiral form.
  • spiral electrode 82a After firing the coiled sheet 80, spiral electrode 82a, will be embedded in a homogenous integrated tubular body 80a as shown in FIGS. 9, 10 and 11 and will extend along the full length of the body 80a.
  • a thin metallic helical layer or stripe 90 may be bounded to the exterior of the body 80a along its full length.
  • Wires 92, 94 may be connected to opposite ends of the conductive coil defined by a layer 90.
  • a further wire 96 may be connected to the electrode 82a. This may be done by forming a slot 98 inside the body 80a to expose the electrode 82a as shown in FIG. 10.
  • FIG. 12 shows the equivalent circuit generally designated as reference numeral 166 of the electronic reactor 50a.
  • the coiled layer 90 is an inductor and the electrode 82a is a capacitor electrode and in circuit constitute a electronic filter, tuned circuit, passive L-C network or serve as an input terminal of circuit 100 and the wire 94 will be an output terminal with the wire 96 acting as a grounded terminal.
  • Reactor 50a may, if desired, be used with the piston 28 (FIG. 1) to form part of an adjustable reactor assembly having a fixed inductive reactance and variable capacitive reactance.
  • the reactors 50 and 50a have rugged, monolithic structures which insure dimensional stability, permanency of electrical parameters, and mechanical resistance to shock and vibration. They may be manufactured relatively inexpensively in ve small or miniature sizes for use in COI'IJUIICICIOI'I WI printed circuit, transistors, etc. They can have extended variable capacitance ranges from substantially zero up to rather high capacitance values.
  • the invention claimed is: 1. In a trimmer capacitor of the type wherein a piston moves longitudinally in a tubular monolithic homogeneous dielectric cylinder and wherein said piston serves as a first electrode, the improvement comprising a thin tubular metallic electrode, said electrode being wound radially in a substantially single spiral and embedded in said cylinder in coaxial alignment therewith; and
  • a tubular trimmer capacitor as defined in claim 1 further comprising a helical metallic layer bonded to the exterior of said cylinder to constitute an inductor per se and a capacitance in conjunction with the electrode embedded in said cylinder.
  • a method of making an electronic reactor component comprising the steps of bonding a thin, metallic layer to a portion of a thin flexible dielectric sheet;
  • a method as defined in claim 5, comprising the further steps of connecting conductors to ends of said inductor and to said electrode.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
  • Coils Or Transformers For Communication (AREA)
US55854A 1970-07-17 1970-07-17 Tubular electronic reactor component having an embedded electrode Expired - Lifetime US3688226A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US5585470A 1970-07-17 1970-07-17

Publications (1)

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US3688226A true US3688226A (en) 1972-08-29

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US55854A Expired - Lifetime US3688226A (en) 1970-07-17 1970-07-17 Tubular electronic reactor component having an embedded electrode

Country Status (4)

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US (1) US3688226A (de)
DE (1) DE2135767C3 (de)
FR (1) FR2099441B1 (de)
GB (1) GB1315878A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3818390A (en) * 1973-04-12 1974-06-18 Us Army Superconductive tunable filter with narrow band and broad tuning range
US4385279A (en) * 1981-08-04 1983-05-24 Motorola, Inc. Tunable helical resonator
US6498712B1 (en) 2002-03-06 2002-12-24 Voltronics Corporation Variable capacitor
US20060290448A1 (en) * 2005-06-24 2006-12-28 Wynn Tracy A Tunable resonant cable trap

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2420521B (en) * 2004-11-24 2007-08-15 Lg Philips Displays B V Improvements in and relating to electrodes and to tube manufacture
US8908350B2 (en) * 2008-06-25 2014-12-09 Core Wireless Licensing S.A.R.L. Capacitor

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2654034A (en) * 1951-05-31 1953-09-29 Designers For Industry Inc Circuit tuning device
US2688177A (en) * 1950-03-24 1954-09-07 Aerovox Corp Capacitor
GB743717A (en) * 1953-02-09 1956-01-25 British Dielectric Res Ltd Improvements in the manufacture of electric circuit components
US2827601A (en) * 1955-06-15 1958-03-18 Amron Israel Ltd Trimming condensers
US2860248A (en) * 1954-06-09 1958-11-11 Aladdin Ind Inc Wide range radio frequency tuner
US2884605A (en) * 1953-09-11 1959-04-28 Cornell Dubilier Electric Electrical suppressor
US2998840A (en) * 1957-02-28 1961-09-05 Polymer Corp Laminated strip product for electrical purposes
US3064257A (en) * 1958-02-14 1962-11-13 James D Guest Antenna with adjustable tuning reactance
US3135936A (en) * 1962-10-10 1964-06-02 Collins Radio Co Movable slug inductor tuned tank circuit having capacitor means compensating mechanical vibration
US3206659A (en) * 1963-05-10 1965-09-14 Jfd Electronics Corp Trimmer capacitor with radiation absorbing glass envelope
US3274466A (en) * 1963-10-04 1966-09-20 Aladdin Ind Inc Variable capacitor
US3284682A (en) * 1964-03-16 1966-11-08 Myron E Lippman Controlled environment capacitive element

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2303283A (en) * 1938-06-14 1942-11-24 Reyrolle A & Co Ltd Electrically insulating bodies
US2989630A (en) * 1957-10-14 1961-06-20 Motorola Inc Tuning apparatus

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2688177A (en) * 1950-03-24 1954-09-07 Aerovox Corp Capacitor
US2654034A (en) * 1951-05-31 1953-09-29 Designers For Industry Inc Circuit tuning device
GB743717A (en) * 1953-02-09 1956-01-25 British Dielectric Res Ltd Improvements in the manufacture of electric circuit components
US2884605A (en) * 1953-09-11 1959-04-28 Cornell Dubilier Electric Electrical suppressor
US2860248A (en) * 1954-06-09 1958-11-11 Aladdin Ind Inc Wide range radio frequency tuner
US2827601A (en) * 1955-06-15 1958-03-18 Amron Israel Ltd Trimming condensers
US2998840A (en) * 1957-02-28 1961-09-05 Polymer Corp Laminated strip product for electrical purposes
US3064257A (en) * 1958-02-14 1962-11-13 James D Guest Antenna with adjustable tuning reactance
US3135936A (en) * 1962-10-10 1964-06-02 Collins Radio Co Movable slug inductor tuned tank circuit having capacitor means compensating mechanical vibration
US3206659A (en) * 1963-05-10 1965-09-14 Jfd Electronics Corp Trimmer capacitor with radiation absorbing glass envelope
US3274466A (en) * 1963-10-04 1966-09-20 Aladdin Ind Inc Variable capacitor
US3284682A (en) * 1964-03-16 1966-11-08 Myron E Lippman Controlled environment capacitive element

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3818390A (en) * 1973-04-12 1974-06-18 Us Army Superconductive tunable filter with narrow band and broad tuning range
US4385279A (en) * 1981-08-04 1983-05-24 Motorola, Inc. Tunable helical resonator
US6498712B1 (en) 2002-03-06 2002-12-24 Voltronics Corporation Variable capacitor
US20060290448A1 (en) * 2005-06-24 2006-12-28 Wynn Tracy A Tunable resonant cable trap

Also Published As

Publication number Publication date
DE2135767A1 (de) 1972-01-20
DE2135767B2 (de) 1978-10-26
FR2099441A1 (de) 1972-03-17
DE2135767C3 (de) 1979-06-28
FR2099441B1 (de) 1976-04-02
GB1315878A (en) 1973-05-02

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AS Assignment

Owner name: AMERICAN TECHNICAL CERAMICS CORP., A CORP. OF DE.

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:PHASE INDUSTRIES, INC., A NY. CORP.;REEL/FRAME:004690/0101

Effective date: 19861222