Portable telephone communication device for the hearing impaired

• US 4,268,721 A
• Filed: 05/02/1977
• Issued: 05/19/1981
• Est. Priority Date: 05/02/1977
• Status: Expired due to Term

• Current Assignee: SRI International, Inc.
• Original Assignee: SRI International, Inc.
• Inventors: Stehle, Roy H., Fylstra, David J., Nielson, Donald L.
• Primary Examiner(s): Stellar, George G.
• Application Number:
  US05/792,761
• Time in Patent Office: 1,478 Days
• Field of Search: 179/1 C, 179/2 C
• US Class Current: 379/52
• CPC Class Codes: G09B 21/009 Teaching or communicating with deaf persons G09B21/04 takes precedence; deaf and dumb persons G09B21/00
• CPC Class Codes: H04M 1/2155 Acoustic coupling
• CPC Class Codes: H04M 1/2475 for a hearing impaired user
• CPC Class Codes: H04M 11/066 Telephone sets adapted for data transmision

Abstract

A portable telephone communications device for the hearing impaired can be carried in the pocket of the user and attaches directly to the telephone handset without intrusion. It includes a keyboard and a readout which enables the user to transmit data by means of the keyboard and receive data which is presented on either an electronic display or a printer or both.

Claims

1. A telephone communication terminal for enabling the use of a conventional telephone for communication with the hearing impaired, comprising:

a portable container means,

means for attaching said container means to a telephone handset to be supported thereby including acoustical coupling means at one surface of said container, for removably coupling to said telephone handset,

said container means including a keyboard with a complete set of alphanumeric characters for use to generate signals representing any complete selected message of alphanumeric characters,

circuit means within said container means responsive to actuation of said keyboard to generate signals responsive thereto suitable for transmittal through said acoustical coupling means over an acoustical telephone line,

pickup means within said container means responsive to acoustical signals received from said telephone handset to generate signals related thereto,

a display device,

control means including modem means adopted to simultaneously control the transmittal of the signals generated by said circuit means through said acoustical coupling means over the acoustical telephone line, and to respond to the signals generated by said pickup means, said control means include means to activate said display means to provide a display of alphanumeric characters related to the acoustical signals received from said telephone handset, and said container means comprises two separate parts, a first part including a first acoustical coupling means for coupling to the transmitter of a telephone handset, a second part including a second acoustical coupling means for coupling to the receiver of said telephone handset, and extensible hinge means coupling said first and second parts together, whereby said two parts are substantially foldable on one another.

2. A system as recited in claim 1 wherein said first acoustical coupling means comprises a hollow cylinder having an internal diameter to releasably fit over the receiver portion of said telephone handset, and

said second acoustical coupling means includes a hollow cylinder having an internal diameter to releasably fit over the transmitter portion of said telephone handset.