US3710040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microphone having improved piezoelectric transducer supports
Assignee: EF Johnson Technologies Inc
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Filing: 1970-09-03
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Granted: 1973-01-09
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Expires: 1990-09-03
Abstract
Abstract A microphone assembly in which a piezoelectric transducer beam is attached at one end to a flexible diaphragm and is supported at the other end by simply resting upon an electrical contact without being connected thereto. The transducer beam is pressed against the supporting contact by a second electrical contact that is shaped to support the transducer beam near its center and to apply a rotary force thereto. The second electrical contact has a rectangular opening formed in an end portion thereof for receiving and supporting the transducer beam and the end portion of the electrical contact beyond the rectangular opening is rolled over to form a spring for applying rotary force to the transducer beam.
Inventors
- 👤 F Swinehart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:06
CPC Classifications
H; H04; H04R; H04R17/00; H04R17/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
146 words
In a microphone assembly including a flexible diaphragm adapted to vibrate in response to sound waves, a piezoelectric transducer beam having first and second electrodes disposed on the surfaces thereof and being attached at one end to said diaphragm for translating the vibrations thereof into corresponding electrical signals, and two electrical contact elements for making electrical contact with respective electrodes on said transducer beam to receive said electrical signals, the improvement wherein the first electrical contact is connected to a first electrode and includes means for supporting a transducer beam at a first point and further means to apply a force to said beam so as to tend to cause rotation thereof about said first point, and wherein the second electrical contact is connected to a second electrode and shaped and positioned to support the transducer beam at a second point in opposition to said force.
Claim 2
Dependent Claim
146 words
In a microphone assembly including a flexible diaphragm adapted to vibrate in response to sound waves, a piezoelectric transducer beam having first and second electrodes disposed on the surfaces thereof and being attached at one end to said diaphragm for translating the vibrations thereof into corresponding electrical signals, and two electrical contact elements for making electrical contact with respective electrodes on said transducer beam to receive said electrical signals, the improvement wherein the first electrical contact is connected to a first electrode and includes means for supporting a transducer beam at a first point and further means to apply a force to said beam so as to tend to cause rotation thereof about said first point, and wherein the second electrical contact is connected to a second electrode and shaped and positioned to support the transducer beam at a second point in opposition to said force.
Claim 3
Dependent Claim
56 words
The microphone assembly of claim 1 wherein said first electrical contact has an opening formed in one end portion thereof for receiving said transducer beam, said one end portion of said first electrical contact being rolled over to comprise a spring for applying the force to said transducer beam when it is inserted in said opening.
Claim 4
Dependent Claim
45 words
The microphone assembly of claim 1 and further comprising a hollow, metallic housing adapted to support said flexible diaphragm at the periphery thereof, both of said electrical contacts being attached to the bottom of said housing, and said second contact being insulated from said housing.
Claim 5
Dependent Claim
46 words
The microphone assembly of claim 3 and further comprising two locating bosses formed in the bottom of said housing for indicating the correct location of said two electrical contacts and means associated with said electrical contacts for engaging said locating bosses to correctly position said contacts.
Claim 6
Dependent Claim
34 words
The microphone assembly of claim 4 and further comprising means attached to said second electrical contact for receiving a first electrical conductor and means attached to said housing for receiving a second electrical conductor.
Claim 7
Dependent Claim
45 words
The microphone assembly of claim 5 wherein said flexible diaphragm is attached to said one end of said transducer beam by means of a drive pin connected between said diaphragm and said transducer beam transverse to the surface of said diaphragm and said transducer beam.
Claim 8
Dependent Claim
35 words
The microphone assembly of claim 2 wherein said second electrical contact contains an upstanding end portion having a notch cut therein for receiving the end of said transverse beam and securing it against transverse motion.
Claim 9
Dependent Claim
42 words
The microphone assembly of claim 3 and further comprising a pair of downwardly depending edges on said second electrical contact and an insulator block adapted to fit between said downwardly depending edges to insulate said second electrical contact from said metallic housing.
Claim 10
Dependent Claim
72 words
The microphone assembly of claim 8 and further comprising two locating bosses formed in the bottom of said housing for indicating the correct location of said two electrical contacts, an opening formed in said insulator block for engaging one of said locating bosses to correctly position said second electrical connector, and an opening formed in said first electrical contact for engaging the other locating boss to correctly position said first electrical contact.
Claim 11
Dependent Claim
39 words
The microphone assembly of claim 9 and further comprising an opening formed in each of said first and second electrical contacts for receiving corresponding rivets to attach said first and second electrical contacts to the bottom of said housing.
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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |