US3553374A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustic coupler
Assignee: Digitronics Corp
•
Filing: 1969-03-20
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Granted: 1971-01-05
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Expires: 1989-03-20
Abstract
Abstract An acoustic coupler for coupling a telephone handset to a source of shift frequency signals representing binary information comprising an enclosure adapted to mount a handset on edge so that the microphone of the handset is oriented in a vertical position. The coupler''s speaker, having a cone with a mouth portion, is tightly sealed within a housing with the mouth portion of the speaker cone in communication with an opening in the housing and the housing is sealed within the enclosure. The mouth portion of the speaker cone is also directly opposite and axially withdrawn from an exit portion in the enclosure so that there is a passage between the mouth of the speaker cone and the interior of the enclosure. The area of the exit port is slightly smaller than the area of the mouth portion of the speaker cone, and the peripheral edge of the exit port is surrounded by a collar of elastomeric material to acoustically and sealingly engage the transmitter portion of the telephone handset. An acoustic energy absorbing material such as felt covers the mouth portion of the speaker cone to provide an acoustic low-pass filter and the walls of the enclosure to provide high audio frequency damping.
Inventors
- 👤 Edgar Wolf
- 👤 Francis C Marino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:06
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/02; H04M1/21; H04M1/215; H04M1/2155
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
177 words
A transducer for use with a telephone handset and the like comprising a housing, said housing being provided with an opening, a speaker positioned in said housing, said speaker including a speaker cone with a mouth portion positioned in the opening of said housing, and a low-pass filter means completely covering the mouth portion of said speaker cone, said low-pass filter means comprising a felt disc, said transducer further including sealing means for sealing said speaker in said housing so that only the mouth portion of said speaker cone can communicate with the region external to said housing, an enclosure provided with an exit port enclosing said housing and said speaker with the mouth portion of said speaker cone directly opposite the exit port, said sealing means including spacing means for supporting said speaker so that the mouth portion of the speaker cone is within said enclosure and axially withdrawn from said exit port, and a passage between the mouth of the speaker and the interior of the enclosure to control low frequency response of said speaker.
Claim 2
Dependent Claim
177 words
A transducer for use with a telephone handset and the like comprising a housing, said housing being provided with an opening, a speaker positioned in said housing, said speaker including a speaker cone with a mouth portion positioned in the opening of said housing, and a low-pass filter means completely covering the mouth portion of said speaker cone, said low-pass filter means comprising a felt disc, said transducer further including sealing means for sealing said speaker in said housing so that only the mouth portion of said speaker cone can communicate with the region external to said housing, an enclosure provided with an exit port enclosing said housing and said speaker with the mouth portion of said speaker cone directly opposite the exit port, said sealing means including spacing means for supporting said speaker so that the mouth portion of the speaker cone is within said enclosure and axially withdrawn from said exit port, and a passage between the mouth of the speaker and the interior of the enclosure to control low frequency response of said speaker.
Claim 3
Dependent Claim
25 words
A transducer as in claim 1, in which said sealing means further includes a washer of acoustically-absorbing material between said housing and said speaker cone.
Claim 4
Dependent Claim
206 words
A transducer for coupling tones to the transmitter portion of a telephone handset comprising a housing provided with an opening, a speaker including a speaker cone having a mouth portion, said speaker being disposed in said housing with thE mouth portion of said speaker cone being disposed in said opening, means for tightly sealing said speaker in said housing so that only the mouth portion of said speaker cone can communicate with the region external to said housing, an enclosure provided with an exit port, said housing and said speaker being disposed in said enclosure with the mouth portion of said speaker cone directly opposite the exit port, and a collar of elastomeric material around the peripheral edge of the exit port for acoustically sealingly engaging the transmitter portion of the telephone handset, the area of said exit port being slightly smaller than the area of the mouth of said speaker, said transducer further including means for supporting said housing and said speaker so that the mouth portion of the speaker cone is within said enclosure and axially withdrawn from the exit port, and a passage between the mouth of the speaker and the interior of the enclosure to control low frequency response of said speaker.
Claim 5
Dependent Claim
206 words
A transducer for coupling tones to the transmitter portion of a telephone handset comprising a housing provided with an opening, a speaker including a speaker cone having a mouth portion, said speaker being disposed in said housing with thE mouth portion of said speaker cone being disposed in said opening, means for tightly sealing said speaker in said housing so that only the mouth portion of said speaker cone can communicate with the region external to said housing, an enclosure provided with an exit port, said housing and said speaker being disposed in said enclosure with the mouth portion of said speaker cone directly opposite the exit port, and a collar of elastomeric material around the peripheral edge of the exit port for acoustically sealingly engaging the transmitter portion of the telephone handset, the area of said exit port being slightly smaller than the area of the mouth of said speaker, said transducer further including means for supporting said housing and said speaker so that the mouth portion of the speaker cone is within said enclosure and axially withdrawn from the exit port, and a passage between the mouth of the speaker and the interior of the enclosure to control low frequency response of said speaker.
Claim 6
Dependent Claim
55 words
A transducer as in claim 3, in which said enclosure includes a bottom wall, a top wall, opposed sidewalls, a front wall, and a rear wall; said exit port being provided in said front wall, whereby a telephone handset is oriented with the granular carbon transmitter in a vertical position when connected with said transducer.
Claim 7
Dependent Claim
21 words
A transducer as in claim 3, and high audio frequency damping means disposed on the interior wall portions of said enclosure.
Claim 8
Dependent Claim
211 words
A transducer for coupling tones to the transmitter portion of a telephone handset comprising a housing provided with an opening, a speaker including a speaker cone having a mouth portion, said speaker being disposed in said housing with the mouth portion of said speaker cone being disposed in said opening, means for sealing said speaker in said housing so that only the mouth portion of said speaker cone can communicate with the region external to said housing, and enclosure provided with an exit port, said housing and said speaker being disposed in said enclosure with the mouth portion of said speaker cone directly opposite the exit port, a member of material which partially absorbs acoustic energy completely covering said exit port to provide and acoustic filter, a collar of elastomeric material around the peripheral edge of the exit port for acoustically sealingly engaging the transmitter portion of the telephone handset, means for supporting said housing and said speaker so that the mouth portion of the speaker cone is within said enclosure and axially withdrawn from the exit port and the face of said housing is spaced from the interior side of the wall defining said exit port, and acoustic energy absorbing means disposed on the interior wall portions of said enclosure.
Claim 9
Dependent Claim
211 words
A transducer for coupling tones to the transmitter portion of a telephone handset comprising a housing provided with an opening, a speaker including a speaker cone having a mouth portion, said speaker being disposed in said housing with the mouth portion of said speaker cone being disposed in said opening, means for sealing said speaker in said housing so that only the mouth portion of said speaker cone can communicate with the region external to said housing, and enclosure provided with an exit port, said housing and said speaker being disposed in said enclosure with the mouth portion of said speaker cone directly opposite the exit port, a member of material which partially absorbs acoustic energy completely covering said exit port to provide and acoustic filter, a collar of elastomeric material around the peripheral edge of the exit port for acoustically sealingly engaging the transmitter portion of the telephone handset, means for supporting said housing and said speaker so that the mouth portion of the speaker cone is within said enclosure and axially withdrawn from the exit port and the face of said housing is spaced from the interior side of the wall defining said exit port, and acoustic energy absorbing means disposed on the interior wall portions of said enclosure.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |