US3678419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three-terminal modular electric filters
Assignee: Societe Anonyme de Telecommunications SAT
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Filing: 1970-12-28
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Granted: 1972-07-18
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Expires: 1990-12-28
Abstract
Abstract An improved modular construction of a three-terminal electric filter element comprising an adjustable inductance and a plurality of fixed capacitors, comprising an insulating base bearing output pins and assembled to a metal casing, wherein the capacitors are fixed mechanically and connected electrically to a connecting plate which is made of an insulating material and at least one of whose surfaces bears a circuit of electric connections in the form of a printed circuit for connecting the members making up the modular element, and wherein the pins extend through the inside of the casing to engage in holes with which the connecting plate is formed at selected points of the printed circuit.
Inventors
- 👤 Jacques R Boulin
- 👤 Alexis Nepomiastchy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:06
CPC Classifications
H; H05; H05K; H05K5/00; H05K5/04; H03; H03H; H03H1/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
161 words
A three-terminal filter modular element, in combination with a variable inductance and one or more fixed capacitors in a single mechanically constructed unit, said modular element comprising a metal casing, an insulating base bearing output pins which is assembled to said metal casing, a connecting plate, said capacitors being mechanically fixed and electrically connected to said connecting plate which is made of an insulating material and at least one surface of said connecting plate bearing a printed circuit for connecting the electrical members making up said modular elements, said pins extending through the inside of said casing to engage in holes with which said connecting plate is formed at selected points of said printed circuit, and said variable inductance comprising a coil and a magnetic ferrite pot of rectangular cross-section disposed in a square section of the modular element casing and allowing the output pins to extend freely through the gaps between the casing and the pot to the connecting plate.
Claim 2
Dependent Claim
161 words
A three-terminal filter modular element, in combination with a variable inductance and one or more fixed capacitors in a single mechanically constructed unit, said modular element comprising a metal casing, an insulating base bearing output pins which is assembled to said metal casing, a connecting plate, said capacitors being mechanically fixed and electrically connected to said connecting plate which is made of an insulating material and at least one surface of said connecting plate bearing a printed circuit for connecting the electrical members making up said modular elements, said pins extending through the inside of said casing to engage in holes with which said connecting plate is formed at selected points of said printed circuit, and said variable inductance comprising a coil and a magnetic ferrite pot of rectangular cross-section disposed in a square section of the modular element casing and allowing the output pins to extend freely through the gaps between the casing and the pot to the connecting plate.
Claim 3
Dependent Claim
42 words
A three-terminal filter modular element as set forth in claim 1, wherein an adjusting aperture is formed in the base to enable the ferrite pot to be adjusted, the aperture being closed after adjustment by a sealing-tight disc which can be applied.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |