US4178488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telephone set
Assignee: Toa Corp
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Filing: 1978-07-14
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Granted: 1979-12-11
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Expires: 1998-07-14
Abstract
Abstract A telephone set has a transmitter-receiver including a first portion for mounting a microphone, a second portion for mounting a speaker for loudspeaking, an earphone for low speaking with an opening formed in the first portion so that the side walls of the opening connect the microphone to the second portion without acoustic coupling between the first and second portions, and a base member shaped to support the transmitter-receiver. The base member has a telephone number operating board which is accessible through the opening in the first portion when the transmitter-receiver is positioned on the base member. A mechanical switch on the base member responds to the placement of the transmitter-receiver to effect switching between the loudspeaking and lowspeaking modes of operation. Also disclosed is a microphone support member which can support the microphone without exerting any adverse effect on the characteristics thereof.
Inventors
- 👤 Yukihiro Nishihata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:41
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/60; H04M1/62; H04M1/02; H04M1/03
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
182 words
A combined loudspeaking and lowspeaking telephone set comprising: a transmitter-receiver, said transmitter-receiver having: a slightly bent portion at the center thereof, a first portion on one side of said bent portion, said first portion having a microphone compartment therein and an opening therethrough, the sides of said opening connecting said microphone compartment to said bent portion, and a second portion on the side of said bent portion opposite said first portion, said second portion having a speaker compartment therein; microphone means in said microphone compartment for receiving sound waves; speaker means in said speaker compartment for selectively delivering both loudspeaking and lowspeaking sound waves; a base member shaped to receive said transmitter-receiver thereon, said base member having an inclined portion and a telephone number operating board projecting from said inclined portion; and said opening through said first portion being removably fitted over and around said projecting operating board, whereby positioning said opening over and around said operating board permits access to said operating board through said opening and allows said first portion to rest on said inclined portion of said base member.
Claim 2
Dependent Claim
182 words
A combined loudspeaking and lowspeaking telephone set comprising: a transmitter-receiver, said transmitter-receiver having: a slightly bent portion at the center thereof, a first portion on one side of said bent portion, said first portion having a microphone compartment therein and an opening therethrough, the sides of said opening connecting said microphone compartment to said bent portion, and a second portion on the side of said bent portion opposite said first portion, said second portion having a speaker compartment therein; microphone means in said microphone compartment for receiving sound waves; speaker means in said speaker compartment for selectively delivering both loudspeaking and lowspeaking sound waves; a base member shaped to receive said transmitter-receiver thereon, said base member having an inclined portion and a telephone number operating board projecting from said inclined portion; and said opening through said first portion being removably fitted over and around said projecting operating board, whereby positioning said opening over and around said operating board permits access to said operating board through said opening and allows said first portion to rest on said inclined portion of said base member.
Claim 3
Dependent Claim
42 words
A telephone set as claimed in claim 1, wherein said speaker means is comprised of: a loudspeaker adjacent the upper surface of said speaker compartment; and an earphone for lowspeaking positioned against the lower surface of said speaker compartment of said transmitter-receiver.
Claim 4
Dependent Claim
80 words
A telephone set as claimed in claim 1, wherein a stepped portion is formed on one side of said inclined portion of said telephone number operating board at substantially the central portion of said base member; and further comprising loudspeaking/lowspeaking mode changeover switch means projecting from said stepped portion for switching said speaker means between loudspeaking and lowspeaking in conjunction with the positioning of said first portion around said number operating board on said stepped portion of said inclined portion.
Claim 5
Dependent Claim
31 words
A telephone set as claimed in claim 1, wherein an intercepting wall is provided in said second portion of said transmitter-receiver at said speaker compartment for hermetically sealing said speaker compartment.
Claim 6
Dependent Claim
129 words
A telephone set as claimed in claim 1, wherein said microphone means is comprised of: a microphone in said microphone compartment; a supporting member of elastic material around the base of said microphone, said supporting member having: a first thickened portion fitted around the bottom of said microphone, a second thick flange portion surrounding and spaced from said first thickened portion and fixed to the inside wall of said microphone compartment, and a third edge portion extending between and connecting said first and second portions; lead wires connected to said microphone and extending through said first thickened portion; a printed plate board adjacent said first thickened portion connected to said wires extending through said first thickened portion; and connecting wires connected to and leading from said printed plate board.
Claim 7
Dependent Claim
17 words
A telephone set as claimed in claim 5, wherein said third edge portion has a wavy configuration.
Claim 8
Dependent Claim
19 words
A telephone set as claimed in claim 5, wherein said third edge portion has a plurality of openings therethrough.
Claim 9
Dependent Claim
73 words
A telephone set as claimed in claim 1, wherein: said transmitter-receiver is comprised of an upper casing and a lower casing fitted to said upper casing, one of said casings having a recessed groove therein around the circumference of said speaker compartment; and a packing material is fitted into said groove between said upper and lower casings around said speaker compartment, whereby said speaker compartment is sealed when said casings are fitted together.
Claim 10
Dependent Claim
26 words
A telephone set as claimed in claim 8, wherein said packing material is comprised of a silicone resin the the form of an endless hollow tube.
References Cited (Backward Citations)
US2720332A
Cited
FR1372895A
Cited
US3521008A
Cited
US3564164A
Cited
GB1215958A
Cited
US3659050A
Cited
DE2139207A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-10 | 1983-06-11 | 1983-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-10 | 1987-06-11 | 1987-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-10 | 1991-06-11 | 1991-12-11 | $7700.00 | Window Closed / Lapsed |