Patent US4297411A successfully refreshed from Google Patents.
Patent US3681664A successfully refreshed from Google Patents.
US3681664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trimmer capacitor for printed circuit board
Assignee: Jfd Electronics Corp
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Filing: 1971-08-19
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Granted: 1972-08-01
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Expires: 1991-08-19
Abstract
Abstract A trimmer capacitor having painted conductive leads is soldered directly to appropriate conductive sections of a printed circuit panel. A portion of the adjustment mechanism of the printed circuit board is disposed at least partly within an opening in the printed circuit board so that the trimmer capacitor has a minimum height above the upper surface of the printed circuit board. During manufacture, a lug is soldered to the printed circuit, which lug is to be connected to the rotor electrode, and the board is then cleaned of soldering flux. The stator of the capacitor is then soldered to the printed circuit board and the board is again rinsed clean of soldering flux. The rotor assembly is later mounted on the soldered stator assembly, and the rotor electrode is connected to the printed circuit board by a pressure connection to the lug. The sliding interface between the stator and rotor is not subjected to soldering fluxes, so as to not interfere with intimate seating and free sliding of these surfaces relative to one another.
Inventors
- 👤 Louis G Metzger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:00
CPC Classifications
H; H01; H01G; H01G5/00; H01G5/01; H01G5/013; H01G5/0134; H01G5/0136; G; G04; G04F; G04F5/00; G04F5/04; G04F5/06; G04F5/063; G04F5/066; Y; Y10; Y10T; Y10T29/00; Y10T29/43; Y10T29/435
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
332 words
In combination, a printed circuit board, a trimmer capacitor; said printed circuit board comprising a generally flat, elongated insulation board having a first conductive region on a first surface thereof; said printed circuit board having an opening therethrough; said trimmer capacitor comprising a stator body, a rotor body, and adjustment shaft, and lug means for making electrical connection from said rotor body; said stator body comprising a first flat body of dielectric material and a flat, elongated stator electrode supported by said first flat body at a surface adjacent one side of said first body; the opposite side of said first body being mechanically secured to said first surface of said printed circuit board and extending across said opening in said printed circuit board; said stator electrode being electrically connected to said first conductive region; said rotor body comprising a second flat body of dielectric material, disposed adjacent said one side of said first body and a flat, elongated rotor electrode supported by said second flat body in a plane generally parallel to the plane of said stator electrode; said rotor body being rotatable relative to said stator body; said stator and rotor electrodes being shaped to present a different overlapping area with rotation of said rotor body in order to vary the capacitance defined by said stator and rotor electrodes; said adjustment shaft comprising an elongated conductive shaft disposed perpendicular to said first and second flat bodies extending through aligned central openings in said first and second flat bodies and extending into said opening in said printed circuit board; one end of said adjustment shaft being mechanically connected to said rotor body and being electrically connected to said rotor electrode; the other end of said adjustment shaft being disposed within said opening in said printed circuit board and being connected to said opposite side of said first body, thereby to press said first and second bodies toward one another; said lug means comprising a conductive lug connected to said adjustment shaft.
Claim 2
Dependent Claim
332 words
In combination, a printed circuit board, a trimmer capacitor; said printed circuit board comprising a generally flat, elongated insulation board having a first conductive region on a first surface thereof; said printed circuit board having an opening therethrough; said trimmer capacitor comprising a stator body, a rotor body, and adjustment shaft, and lug means for making electrical connection from said rotor body; said stator body comprising a first flat body of dielectric material and a flat, elongated stator electrode supported by said first flat body at a surface adjacent one side of said first body; the opposite side of said first body being mechanically secured to said first surface of said printed circuit board and extending across said opening in said printed circuit board; said stator electrode being electrically connected to said first conductive region; said rotor body comprising a second flat body of dielectric material, disposed adjacent said one side of said first body and a flat, elongated rotor electrode supported by said second flat body in a plane generally parallel to the plane of said stator electrode; said rotor body being rotatable relative to said stator body; said stator and rotor electrodes being shaped to present a different overlapping area with rotation of said rotor body in order to vary the capacitance defined by said stator and rotor electrodes; said adjustment shaft comprising an elongated conductive shaft disposed perpendicular to said first and second flat bodies extending through aligned central openings in said first and second flat bodies and extending into said opening in said printed circuit board; one end of said adjustment shaft being mechanically connected to said rotor body and being electrically connected to said rotor electrode; the other end of said adjustment shaft being disposed within said opening in said printed circuit board and being connected to said opposite side of said first body, thereby to press said first and second bodies toward one another; said lug means comprising a conductive lug connected to said adjustment shaft.
Claim 3
Dependent Claim
31 words
The combination of claim 1 which includes spring means disposed within said opening in said printed circuit board and connected between said other end of said shaft and said first body.
Claim 4
Dependent Claim
84 words
The combination of claim 1 wherein said conductive lug is disposed at least partly within said opening in said printed circuit board; said conductive lug having a disk-shaped body portion disposed around said adjustment shaft and in electrical contact therewith; said printed circuit board having a second conductive region on the surface thereof opposite to said first surface; said conductive lug hAving an extending section extending from out of said opening in said printed circuit board and into contact with said second conductive region.
Claim 5
Dependent Claim
49 words
The combination of claim 3 which includes spring means disposed within said opening in said printed circuit board and connected between said other end of said shaft and said first body; said disk-shaped body portion of said lug means being disposed between said first body and said spring means.
Claim 6
Dependent Claim
84 words
The combination of claim 1 wherein said rotor electrode is embedded in said second body, and wherein said stator electrode is deposited on the top of said one side of said first body, whereby said stator and rotor electrodes are spaced from one another by the thickness of the dielectric of said second body from said rotor electrode to the exterior side of said second body adjacent said first body; and lubrication means for lubricating the engaging surfaces of said first and second bodies.
Claim 7
Dependent Claim
34 words
The combination of claim 1 wherein said stator electrode has an axially extending portion extending along a side edge of said first body; said axially extending portion being soldered to said first conductive region.
Claim 8
Dependent Claim
106 words
The combination of claim 1 wherein said stator electrode has an axially extending portion extending along a side edge of said first body; said axially extending portion being soldered to said first conductive region; and wherein said stator further contains a conductive pad on said one side; said pad being spaced from said stator electrode and defining a continuous surface with said stator electrode for the support of said rotor body; said conductive pad having an axially extending portion extending along a side edge of said first body; said axially extending portion of said pad being soldered to said first surface of said printed circuit board.
Claim 9
Dependent Claim
84 words
The combination of claim 3 wherein said rotor electrode is embedded in said second body, and wherein said stator electrode is deposited on the top of said one side of said first body, whereby said stator and rotor electrodes are spaced from one another by the thickness of the dielectric of said second body from said rotor electrode to the exterior side of said second body adjacent said first body; and lubrication means for lubricating the engaging surfaces of said first and second bodies.
Claim 10
Dependent Claim
34 words
The combination of claim 3 wherein said stator electrode has an axially extending portion extending along a side edge of said first body; said axially extending portion being soldered to said first conductive region.
Claim 11
Dependent Claim
43 words
The combination of claim 9 wherein said stator further contains a conductive pad having an axially extending portion extending along a side edge of said first body; said axially extending portion being soldered to a second conductive region of said printed circuit board.
Claim 12
Independent Claim
167 words
The method of manufacture of a trimmer capacitor comprising the steps of: forming an opening in a support insulation panel; inserting a connection lug within said opening and soldering an extension thereof to one surface of said panel, and thereafter cleaning said panel and lug of soldering flux; attaching a dielectric stator body to the opposite surface of said panel by soldering from said opposite surface to a conductive stator electrode on said stator body, and thereafter cleaning said panel and stator body of soldering flux; lubricating the upper surface of said stator body; and mechanically connecting a rotor body and an adjustment shaft connected thereto to said stator body by connecting one end of said shaft to said connection lug, with one surface of said rotor body in rotatable engagement with said upper surface of said stator body, whereby soldering flux due to the soldering to said lug and said stator electrode does not effect the properties of the lubricant between said rotor and stator bodies.
Claim 13
Independent Claim
167 words
The method of manufacture of a trimmer capacitor comprising the steps of: forming an opening in a support insulation panel; inserting a connection lug within said opening and soldering an extension thereof to one surface of said panel, and thereafter cleaning said panel and lug of soldering flux; attaching a dielectric stator body to the opposite surface of said panel by soldering from said opposite surface to a conductive stator electrode on said stator body, and thereafter cleaning said panel and stator body of soldering flux; lubricating the upper surface of said stator body; and mechanically connecting a rotor body and an adjustment shaft connected thereto to said stator body by connecting one end of said shaft to said connection lug, with one surface of said rotor body in rotatable engagement with said upper surface of said stator body, whereby soldering flux due to the soldering to said lug and said stator electrode does not effect the properties of the lubricant between said rotor and stator bodies.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |