US3051879A - Variable impedance device - Google Patents

Variable impedance device Download PDF

Info

Publication number
US3051879A
US3051879A US84196A US8419661A US3051879A US 3051879 A US3051879 A US 3051879A US 84196 A US84196 A US 84196A US 8419661 A US8419661 A US 8419661A US 3051879 A US3051879 A US 3051879A
Authority
US
United States
Prior art keywords
shell
bore
screw
tubular portion
small diameter
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
US84196A
Inventor
Lazar Nicholas
Keith S Mcintosh
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.)
Corning Glass Works
Original Assignee
Corning Glass Works
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 Corning Glass Works filed Critical Corning Glass Works
Priority to US84196A priority Critical patent/US3051879A/en
Priority to GB1877/62A priority patent/GB944528A/en
Application granted granted Critical
Publication of US3051879A publication Critical patent/US3051879A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F17/00—Fixed inductances of the signal type 
    • H01F17/04—Fixed inductances of the signal type  with magnetic core
    • H01F17/041—Means for preventing rotation or displacement of the 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
    • H01F21/10—Variable inductances or transformers of the signal type continuously variable, e.g. variometers by means of a movable shield
    • 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
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18568—Reciprocating or oscillating to or from alternating rotary
    • Y10T74/18576—Reciprocating or oscillating to or from alternating rotary including screw and nut
    • Y10T74/18752—Manually driven

Definitions

  • a trimmer capacitor as in ⁇ claim l wherein the means for resiliently seating the head of said screw against the sloping surface of said shell comprises a support for the capacitor secured to the shell and a spring partly compressed between such head and the support.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Description

Aug. 28, 1962 N. LAzAR ETAL VARIABLE IMPEDANCE DEVICE Filed Jan. 23, 1961 INVENTORS /V/cf/mas nze mvp /Vf/ r J. /7c//v 70s/f United StatesV Patent iifice 3,051,879 Patented Aug. 28, 1962 3,051,879 VARIABLE vIMPEDAN CE DEVICE Nicholas- Lazar, Scranton, and Keith S. McIntosh, Derrick City, Pa., assignors to Corning Glass Works, Corning, N.Y., a corporation of New York Filed Jan. 23, 1961, Ser. No. 84,196 Claims. (Cl. 317-249) The present invention relates to impedance devices which may alternatively take the form of a variable inductance or capacitance.
Such devices in order to satisfactorily serve their purpose, must be readily adjustable and reasonably free from microphonics, ie., free from uncontrolled variables while being adjusted and subsequently when the equipment with whic-h they are to be used is subjected to vibrations.
The invention has to do with an improved form of variable capacitor or inductor of the general type wherein a fixe-d cylindrical electrode element or spiralled conductor element is carried about one end portion of a glass or ceramic tube, and wherein such tube is secured at the other end to suitable hardware supporting an electrode element within the tube bore axially adjustable therein to change the electrical impedance of the device.
The invention can best be described by reference to the accompanying drawing wherein:
FIG.1 is an enlarged sectional elevation of a trimmer capacitor embodying the invention.
FIG. 2 is a sectional View taken on line 1-1 of FIG. l.
FIG. 3 is an end elevation of the capacitor.
FIG. 4 is a side elevational View of a variable inductor embodying the invention.
Referring to the drawing in detail, the hardware of either `device comprises in the main an exteriorly circular metal shell comprising a tubular portion 11 of relatively small diameter and an adjoining tubular portion '12 of relatively large diameter. The tubular portion 11 at its free end has a square bore 15. In the region of juncture of portions I11 and 12 the bore defining wall surface 16 of portion 12 is preferably conical or may be said to slope outwardly.
A screw 21 occupies the coextensive bores of shell portions 11 and 12 and has a head 22 preferably having a chamfered peripheral surface portion 23 abutted against the sur-face 16 of shell portion 12.
The screw head 22 is resiliently held against surface 16 of portion 12 via a washer 25 and a compression spring 26, by means of a tubular impedance element support 29 which has a large diameter bore bordered by its wall 27 into which portion 112 is projected and held by means of solder 28 or the like. A small diameter externally threaded tubular portion 30 of the support 29 facilitates panel mounting of the device, while its bore 31 -gives access to the ,screw head 22 for purposes of adjustment.
An electrode comprising an axially movable hollow cylinder 35 surrounds the tubular portion 11 of the shell and is provided with a tubular shaft 36 threaded onto the screw 21. -Externally thel shaft 36 is square in cross section and is freely slidable in the square bore of tubular portion 11. A split ring 37 occupies the end thread of screw 21 to limit the movement of cylinder 35 in the direction away from the screw head 22.
Closely surrounding cylinder 35 is a tube 40` of dielectric material attached at one end to shell portion 12 by solder 43. The other end of tube 40 is provided with a metal electr-ode element comprising a cylinder 44 to which is attached a suitable lead wire 45, or alternatively is provided with a spiralled winding 46 having suitable terminals 47 and 48. Electrical connection to the movable electrode element comprising cylinder 35 is mad-e through the medium of screw 21 and the shell portion 12 or through the support 29.
When the secrew 21 is rotated as by means of a screw driver or other suitable instrument, the axial position of cylinder 35 is changed with respect to cylinder 44 to modify the impedance of the device.
What is claimed is:
l. 'In a trimmer capacitor a metal shell comprising a small diameter externally circular tubular portion and an adjoining relatively large diameter tubular end portion, at least part of the small diameter tubular portion having a non-circular bore configuration and the large diameter por'- tion having a circular bore wall defining surface tapered outwardly from its end of juncture with the small diameter tubular portion, a screw occupying the bore of said shell having a head having a chamfered portion engaging the sloping surface of said shell, means for resiliently Iseating said head against said surface, an axially movable core comprising a hollow cylinder closely surrounding the small diameter tubular portion of said shell having a tubular shaft projecting from one end thereof threaded over said screw, said shaft having a non-circular external cross section matching that of the non-circular bore configuration of Isuch small diameter portion of the shell, and a tube of dielectric material closely surrounding said hollow cylinder at one end attached to the relatively large diameter tubularportion of said shell and at the other end carrying a cylinder of metal thereabout.
2. A trimmer capacitor as in `claim l wherein the means for resiliently seating the head of said screw against the sloping surface of said shell comprises a support for the capacitor secured to the shell and a spring partly compressed between such head and the support.
3. A trimmer capacitor as in claim 2 wherein the support comprises a bushing having a Ilarge diameter bore portion ocupied by the large diameter portion of said shell and has an externally threaded relatively small diameter tubular portion through whose bore access may be had to the head of said screw.
4. In a trimmer capacitor a metal shell comprising a small diameter externally circular tubular portion and an adjoining relatively large diameter tubular end portion, at least part of the small diameter tubular portion having a non-circular bore configuration and the large diameter portion having a circular bore wall surface sloping outwardly from its end of juncture with the small diameter tubular portion, a screw occupying the bore of said shell having a head having a chamfered peripheral portion engaging such bore wall surface, means for resiliently seating said head against said surface, a movable core comprising a hollow cylinder having a tubular shaft threaded over said screw and occupying the bore of the small diameter portion of said shell, said shaft having a noncircular cross section matching that of the non-circular bore configuration of such small diameter portion of the shell, and a tube of dielectric material closely `surrounding said hollow cylinder at one end attached -to the relatively large diameter tubular portion of said shell and at the other end carrying a cylinder of metal thereabout, whereby axial -movement of one of said cylinders may be effected relative to the `other by imparting av turning movement to said screw.
S. In an impedance device a metal shell comprising a small diameter externally circular tubular portion and an adjoining relatively large diameter tubular end portion, at least part of the small `diameter tubular portion having a non-circular bore configuration and the lange diameter portion having a circular bore Wall-delining surface tapered outwardly from its end of juncture with the small 10 diameter tubular portion, a screw occupying the bore of said shell having a head having a charnfered portion engaging the sloping surface of said shell, means for resiliently .seating `said head against said surface, an axially movable core comprising a hollow cylinder closely sur- 15 2,930,952
References Cited in the tile of this patent UNITED STATES PATENTS 2,922,093 Kellerman Jan. 19, 1960 Glauber Mar. 29, 1960-
US84196A 1961-01-23 1961-01-23 Variable impedance device Expired - Lifetime US3051879A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US84196A US3051879A (en) 1961-01-23 1961-01-23 Variable impedance device
GB1877/62A GB944528A (en) 1961-01-23 1962-01-18 Variable impedance device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US84196A US3051879A (en) 1961-01-23 1961-01-23 Variable impedance device

Publications (1)

Publication Number Publication Date
US3051879A true US3051879A (en) 1962-08-28

Family

ID=22183428

Family Applications (1)

Application Number Title Priority Date Filing Date
US84196A Expired - Lifetime US3051879A (en) 1961-01-23 1961-01-23 Variable impedance device

Country Status (2)

Country Link
US (1) US3051879A (en)
GB (1) GB944528A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3196331A (en) * 1962-10-22 1965-07-20 Voltronics Corp Piston trimmer capacitor
US3219893A (en) * 1962-03-21 1965-11-23 Richard U Clark Variable capacity trimmer condensers
US3226616A (en) * 1962-08-22 1965-12-28 Jfd Electronics Corp Trimmer capacitor with direct travel mechanism
US3263140A (en) * 1963-07-24 1966-07-26 Jfd Electronics Corp Trimmer capacitor with direct travel mechanism
US3267764A (en) * 1964-03-03 1966-08-23 Berman Nelson Torque element
US3273031A (en) * 1963-10-21 1966-09-13 Matthew A Lafer Direct travel trimmer capacitor
US3274465A (en) * 1966-09-20 Two-position trimmer capacitor
US3360697A (en) * 1962-03-29 1967-12-26 Jfd Electronics Corp Trimmer capacitor with direct travel mechanism
US3808479A (en) * 1973-08-06 1974-04-30 Victor Insetta Air dielectric capacitor
EP1962301A1 (en) * 2007-02-23 2008-08-27 HÜTTINGER Elektronik GmbH + Co. KG Element for adjustment network, adjustment network and application of the same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2922093A (en) * 1957-01-22 1960-01-19 Jfd Electronics Corp Coaxial trimmer capacitors
US2930952A (en) * 1958-06-12 1960-03-29 United Electronics Company Variable vacuum capacitor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2922093A (en) * 1957-01-22 1960-01-19 Jfd Electronics Corp Coaxial trimmer capacitors
US2930952A (en) * 1958-06-12 1960-03-29 United Electronics Company Variable vacuum capacitor

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3274465A (en) * 1966-09-20 Two-position trimmer capacitor
US3219893A (en) * 1962-03-21 1965-11-23 Richard U Clark Variable capacity trimmer condensers
US3360697A (en) * 1962-03-29 1967-12-26 Jfd Electronics Corp Trimmer capacitor with direct travel mechanism
US3226616A (en) * 1962-08-22 1965-12-28 Jfd Electronics Corp Trimmer capacitor with direct travel mechanism
US3196331A (en) * 1962-10-22 1965-07-20 Voltronics Corp Piston trimmer capacitor
US3263140A (en) * 1963-07-24 1966-07-26 Jfd Electronics Corp Trimmer capacitor with direct travel mechanism
US3273031A (en) * 1963-10-21 1966-09-13 Matthew A Lafer Direct travel trimmer capacitor
US3267764A (en) * 1964-03-03 1966-08-23 Berman Nelson Torque element
US3808479A (en) * 1973-08-06 1974-04-30 Victor Insetta Air dielectric capacitor
EP1962301A1 (en) * 2007-02-23 2008-08-27 HÜTTINGER Elektronik GmbH + Co. KG Element for adjustment network, adjustment network and application of the same

Also Published As

Publication number Publication date
GB944528A (en) 1963-12-18

Similar Documents

Publication Publication Date Title
US3051879A (en) Variable impedance device
US3275913A (en) Variable capacitor
US2578608A (en) Screw and nut mechanism
US2516981A (en) Trimmer condenser
US3700983A (en) Variable capacitor having a solid dielectric between its electrodes
US2502202A (en) Unitary inductor and trimming capacitor
US2149702A (en) Variable condenser
US2916723A (en) Low voltage outlet bushing
US2708729A (en) Shakeproof variable condenser
US3360697A (en) Trimmer capacitor with direct travel mechanism
US3611577A (en) Electromicrometer
US2678986A (en) Vacuum gauge of the pirani type
US2460138A (en) Variable inductance device
US2209626A (en) Radio apparatus
US3253477A (en) Trimmer condenser
US2251534A (en) High frequency terminal
US3155887A (en) Gas filled trimmer capacitor
US3268784A (en) Variable capacitor and electrical connector for use therewith
US2151102A (en) Aerial
US2819454A (en) Inductor design
US2765431A (en) Variable capacitor
US3100856A (en) Variable electrical trimmer capacitor
US3348106A (en) Tubular condenser of variable capacity
US712440A (en) Insulator.
US978494A (en) Spark-plug for internal-combustion engines.