Patent US3594632A successfully refreshed from Google Patents.
US3594632A
Expired / Lapsed
US
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Adjustable attenuators and filter apparatus
Assignee: Individual
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Filing: 1970-03-13
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Granted: 1971-07-20
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Expires: 1990-03-13
Abstract
Abstract Three types of potentiometer circuits, resistive, capacitive and inductive are employed in overall adjustable attenuator systems. Each element in a switching network is either a single-terminal element or a double-terminal element and minimum contact between networks follow a switch rule principle.
Inventors
- 👤 Paul P Luger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:13
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/01; H03H7/06; H03H7/24
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
199 words
In combination, in an attenuator device, a plurality of impedance networks, a switch member, three power terminals, each said impedance network having terminals, said terminals of said networks having a plurality of electrical contacts and as required a number up to one for each switch position, said impedance networks being of two types, first of said types of networks capable of interconnection with switch member at each switch position into a series circuit between first and second of three said power terminals and of such relative values as to be able to effect levels of attenuation, together with other cooperating said networks, for a given network design; switch selection means, including ganged common, movable switch contacts for each switch position, said switch positions together with said impedance networks being capable of numerical counting and said switch positions together with selected networks from said impedance networks capable of accommodating signal attenuation; second of said two types of networks designed for parallel connection between selectable points along said series circuit at selected switch positions and third said power terminal, and said first and third power terminals constituting an attenuator input and said second and third power terminal constituting the attenuator output.
Claim 2
Dependent Claim
199 words
In combination, in an attenuator device, a plurality of impedance networks, a switch member, three power terminals, each said impedance network having terminals, said terminals of said networks having a plurality of electrical contacts and as required a number up to one for each switch position, said impedance networks being of two types, first of said types of networks capable of interconnection with switch member at each switch position into a series circuit between first and second of three said power terminals and of such relative values as to be able to effect levels of attenuation, together with other cooperating said networks, for a given network design; switch selection means, including ganged common, movable switch contacts for each switch position, said switch positions together with said impedance networks being capable of numerical counting and said switch positions together with selected networks from said impedance networks capable of accommodating signal attenuation; second of said two types of networks designed for parallel connection between selectable points along said series circuit at selected switch positions and third said power terminal, and said first and third power terminals constituting an attenuator input and said second and third power terminal constituting the attenuator output.
Claim 3
Dependent Claim
18 words
In an attenuator device as described in claim 1, said numerical counting to represent levels of signal attenuaTion.
Claim 4
Dependent Claim
213 words
In an attenuator device, a plurality of attenuator sections such as described in claim 1, main power terminals comprised of a first main power terminal, an input terminal; a second main power terminal, an output terminal; a third main power terminal, a common terminal to both input and output; a fourth main power terminal for use as a principal ''''slide'''' terminal; and further main power terminals for use as additional ''''slide'''' terminals; said first and third said main power terminals connected to the input terminals of a first said attenuator section, the output terminals of the first said attenuator section connected to the input terminals of a second attenuator section, the output terminals of the second said attenuator section connected to the input terminals of a third attenuator section and so on until all sections are interconnected, the output terminals of the last attenuator section connected to the main output terminals, namely, the said main second power terminal, and the said main third power terminal, the latter being interconnected to the third terminal of all filter sections, and the fourth said main power terminal and other main power terminals being connected to selected points along the series circuit which is terminated at its ends by the first and second said main power terminals.
Claim 5
Dependent Claim
176 words
In combination, in an attenuator device, a three terminal potentiometer, two terminals of which are across the total potentiometer impedance and the third terminal of said three terminal potentiometer is the ''''slide'''' terminal, with switch selectable impedance values between two of three terminals, a two terminal impedance device with switch selectable impedance values, a fixed impedance device of the same type of impedance as the said two terminal impedance device, three main power terminals, said two terminal impedance device to be connected in series with the said fixed impedance device to form a series impedance device, this series impedance device to be placed in parallel across the total impedance of the said three terminal potentiometer and also to be connected to two of the three said main power terminals, said series impedance device at the point of connection between said two terminal impedance device and said fixed impedance device to be connected to said ''''slide'''' terminal of said three terminal potentiometer, said slide terminal of said potentiometer to be connected to said third main power terminal.
Claim 6
Dependent Claim
176 words
In combination, in an attenuator device, a three terminal potentiometer, two terminals of which are across the total potentiometer impedance and the third terminal of said three terminal potentiometer is the ''''slide'''' terminal, with switch selectable impedance values between two of three terminals, a two terminal impedance device with switch selectable impedance values, a fixed impedance device of the same type of impedance as the said two terminal impedance device, three main power terminals, said two terminal impedance device to be connected in series with the said fixed impedance device to form a series impedance device, this series impedance device to be placed in parallel across the total impedance of the said three terminal potentiometer and also to be connected to two of the three said main power terminals, said series impedance device at the point of connection between said two terminal impedance device and said fixed impedance device to be connected to said ''''slide'''' terminal of said three terminal potentiometer, said slide terminal of said potentiometer to be connected to said third main power terminal.
Claim 7
Dependent Claim
42 words
In an attenuator device according to claim 4, said first two main power terminals to serve as an attenuator input, and said third main power terminal together with one of the first two main power terminals to serve as an attenuator output.
Claim 8
Dependent Claim
37 words
In an attenuator device according to claim 4, said three terminal potentiometer to be a resistive potentiometer, said two terminal impedance device to be a capacitive device and said fixed impedance device to be a capacitive device.
Claim 9
Dependent Claim
37 words
In an attenuator device according to claim 4, said three terminal potentiometer to be an inductive potentiometer, said two terminal impedance device to be a capacitive device and said fixed impedance device to be a capacitive device.
Claim 10
Dependent Claim
37 words
In an attenuator device according to claim 4, said three terminal potentiometer to be a capacitive potentiometer, said two terminal impedance device to be a resistive device and said fixed impedance device to be a resistive device.
Claim 11
Dependent Claim
37 words
In an attenuator device according to claim 4, said three terminal potentiometer to be a capacitive potentiometer, said two terminal impedance device to be an inductive device and said fixed impedance device to be an inductive device.
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) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |