US3686593A
Expired / Lapsed
US
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Electromechanical resonator
Assignee: International Standard Electric Corp
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Filing: 1970-02-11
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Granted: 1972-08-22
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Expires: 1990-02-11
Abstract
Abstract An electromechanical resonator is provided incorporating a vibrating reed driven by electrostatic forces between itself and an output electrode. The output is represented by capacitance changes between the reed and an output electrode. Multiple resonators may be used to form band-pass filters and the like.
Inventors
- 👤 Hisham Mohamed Saadail Zakaria
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:51
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/70; G; G01; G01S; G01S1/00; G01S1/72; H03H9/46
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
98 words
An electromechanical resonator comprising first electrode means including an input fixed electrode and an input electrically conductive vibrator element, second electrode means including an output fixed electrode and an output electrically conductive vibrator element, and bias means for establishing an electric field between the members of each of said first and second electrode means, the input vibrator element being operatively coupled to the output vibrator element and caused to vibrate at its natural frequency solely by electrostatic forces between itself and said input fixed electrode resulting from modulation of said electric field by an input signal applied thereto.
Claim 2
Dependent Claim
98 words
An electromechanical resonator comprising first electrode means including an input fixed electrode and an input electrically conductive vibrator element, second electrode means including an output fixed electrode and an output electrically conductive vibrator element, and bias means for establishing an electric field between the members of each of said first and second electrode means, the input vibrator element being operatively coupled to the output vibrator element and caused to vibrate at its natural frequency solely by electrostatic forces between itself and said input fixed electrode resulting from modulation of said electric field by an input signal applied thereto.
Claim 3
Dependent Claim
38 words
An electromechanical resonator as claimed in claim 1 wherein said input vibrator element is coupled to said output vibrator element so as to form a single vibrator unit functioning as both the input and the output vibrator elements.
Claim 4
Dependent Claim
67 words
An electromechanical resonator as claimed in claim 1 wherein said input vibrator element is elongated and anchored at one end to a ground plane and vibratable in bending oscillation about said anchored end by said electrostatic forces, the output of the resonator being represented by capacitance changes between said input vibrator elEment and said output vibrator element, the latter being of corresponding electrical shape with the former.
Claim 5
Dependent Claim
33 words
An electromechanical resonator as claimed in claim 1 wherein the second electrode means and a third electrode means are placed adjacent to, and spaced apart from the same side of the vibrator element.
Claim 6
Dependent Claim
33 words
An electromechanical resonator as claimed in claim 2 wherein the output conductive vibrator element of said second means is coupled to said third electrode means so as to provide a single conductive member.
Claim 7
Dependent Claim
68 words
An electromechanical resonator as claimed in claim 4 wherein the second electrode means are provided by a first conductive member, wherein a third electrode means are provided by a second conductive member which is connected to an output terminal, wherein the first and second conductive members coupled together, wherein the vibrator element is biased above earth potential and wherein the vibrator element is connected to an input terminal.
Claim 8
Dependent Claim
31 words
An electromechanical resonator as claimed in claim 1 wherein the second electrode means and a third electrode means are adjacent to, and spaced apart from opposite sides of the vibrator element.
Claim 9
Dependent Claim
33 words
An electromechanical resonator as claimed in claim 1 wherein the second electrode means includes at least one input conductive member, and wherein a third electrode means includes at least one output conductive member.
Claim 10
Dependent Claim
31 words
An electromechanical resonator as claimed in claim 1 wherein the resonator includes a single vibrator element, and the resonator''s input and output terminals are each connected to the single conductive member.
Claim 11
Dependent Claim
19 words
An electromechanical resonantor as claimed in claim 1 wherein the resonator''s input terminal is connected to the vibrator element.
Claim 12
Dependent Claim
35 words
An electromechanical resonator as claimed in claim 1, wherein the resonator includes a plurality of vibrator elements which are each adapted to vibrate in bending oscillators at a different frequency to the other vibrator elements.
Claim 13
Dependent Claim
37 words
An electromechanical resonator as claimed in claim 5, which also includes, between adjacent conductive members, an additional conductive member which is connected to earth potential, and which is adjacent to, and spaced apart from, the vibrator element.
Claim 14
Dependent Claim
22 words
An electromechanical resonator as claimed in claim 1 which includes an electrical voltage source connected between the vibrator element and earth potential.
Claim 15
Dependent Claim
34 words
An electromechanical resonator as claimed in claim 1 which includes an electrical voltage source that is connected between earth potential and each conductive member, and wherein the vibrator element is connected to earth potential.
Claim 16
Dependent Claim
59 words
An electromechanical resonator as claimed in claim 13 wherein the electrical voltage source is a DC voltage source, the positive side of which is connected, via a high impedance to the vibrator element, and the negative side of which is connected to earth potential, and wherein the high impedance and DC voltage source are shunted by a decoupling capacitance.
Claim 17
Dependent Claim
26 words
An electromechanical resonator as claimed in claim 8 wherein a plurality of output conductive members are provided which are each connected to a separate output terminal.
Claim 18
Dependent Claim
55 words
An electromechanical resonator as claimed in claim 8 wherein a plurality of vibrator elements are provided, wherein an input conductive member is associated with one of the vibrator elements, wherein an output conductive member is associated with another one of the vibrator elements, and wherein the resonator includes coupling means situated between adjacent vibrator elements.
Claim 19
Dependent Claim
18 words
An electromechanical resonator as claimed in claim 17 which also includes coupling means situated between non-adjacent vibrator elements.
Claim 20
Dependent Claim
15 words
An electromechanical resonator as claimed in claim 17 wherein the coupling means are either electrical.
Claim 21
Dependent Claim
38 words
An electromechanical resonator as claimed in claim 19 wherein the electrical coupling means includes a conductive plate which is spaced apart from the vibrator elements, and which is arranged transverse to the longitudinal axes of the vibrator elements.
Claim 22
Dependent Claim
53 words
An electromechanical resonator as claimed in claim 19 wherein the electrical coupling means includes for each vibrator element, a conductive plate which is adjacent to, and spaced apart from the associated vibrator element, and wherein each conductive plate is connected to a separate one of the other conductive plates via an amplifier unit.
Claim 23
Dependent Claim
22 words
An electromechanical resonator as claimed in claim 6 wherein the first and second conductive members are coupled together via an amplifier unit.
Claim 24
Dependent Claim
36 words
An electromechanical resonator as claimed in claim 1 wherein the conductive members are each provided with a mesh of micro-holes therein which are arranged to reduce air resistance between the member and the associated vibrator element.
Claim 25
Dependent Claim
20 words
An electromechanical resonator as claimed in claim 1 which includes an evacuated chamber within which the electrode means are located.
References Cited (Backward Citations)
GB321151A
Cited
US2002191A
Cited
US2542611A
Cited
GB865093A
Cited
US3020455A
Cited
US3064213A
Cited
US3192456A
Cited
US3166696A
Cited
US3376521A
Cited
US3369200A
Cited
US3283226A
Cited
US3413497A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |