Patent US3562429A successfully refreshed from Google Patents.
US3562429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sound transmitter with feedback and polarization circuitry
Assignee: TEACHOUT WEST ELECTRO ACOUSTIC
•
Filing: 1968-04-29
•
Granted: 1971-02-09
•
Expires: 1988-04-29
Abstract
Abstract A sound transmitter system utilizing a solid electrolyte battery as a permanent polarization source, and utilizing motional and remote feedback systems.
Inventors
- 👤 Roger A West
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:38
CPC Classifications
H; H04; H04R; H04R19/00; H04R19/02; H04R3/00; H04R3/002
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
143 words
An electrostatic transducer system comprising, an electrically activated acoustic transducer consisting of fixed driving electrode means, fixed feedback electrode means, and fixed acoustically transparent shield electrode means and a movable diaphragm, a direct current polarizing source imposing on said transducer a substantially constant polarizing charge, a signal input source imposing on said driving electrode means and said diaphragm a varying signal, said signal interacting with said constant charge to cause said transducer to produce acoustic energy proportional to said varying signal, and feedback means carrying a feedback signal produced in said feedback electrode means to said signal input source to adjust the amplitude of said varying signal, said shield electrode means being discrete from said diaphragm and being positioned between adjacent driving electrode means and feedback electrode means and shielding said feedback electrode means from the electrostatic field of said driving electrode means.
Claim 2
Dependent Claim
143 words
An electrostatic transducer system comprising, an electrically activated acoustic transducer consisting of fixed driving electrode means, fixed feedback electrode means, and fixed acoustically transparent shield electrode means and a movable diaphragm, a direct current polarizing source imposing on said transducer a substantially constant polarizing charge, a signal input source imposing on said driving electrode means and said diaphragm a varying signal, said signal interacting with said constant charge to cause said transducer to produce acoustic energy proportional to said varying signal, and feedback means carrying a feedback signal produced in said feedback electrode means to said signal input source to adjust the amplitude of said varying signal, said shield electrode means being discrete from said diaphragm and being positioned between adjacent driving electrode means and feedback electrode means and shielding said feedback electrode means from the electrostatic field of said driving electrode means.
Claim 3
Dependent Claim
63 words
A system according to claim 1 in which each of said driving electrode means, feedback electrode means and shield electrode means comprises a plurality of individual electrodes distributed over an area around one surface area of said diaphragm, one electrode of said shield electrode means interposed between each pair of adjacent electrodes of said feedback electrode means and of said driving electrode means.
Claim 4
Dependent Claim
52 words
An electrostatic transducer system according to claim 2 in which said driving electrode means, said feedback electrode means and said shield electrode means further comprises a driving electrode, a feedback electrode and a shield electrode placed proximate the opposite side of said diaphragm from said plurality of driving, shield, and feedback electrodes.
Claim 5
Dependent Claim
20 words
An electrostatic transducer system according to claim 1, in which said direct current polarizing source comprises a solid electrolyte battery.
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |