Transmit only acoustic coupler

Claim 2

An acoustic coupler for semipermanent attachment to a telephone handset microphone cover for permitting either live voice or recorded voice and tone-encoded data transmission over a voice grade switched telephone network, comprising: enclosure cover means pneumatically sealed to the handset microphone cover for excluding ambient noise in the data transmission mode, a dynamic speaker pneumatically sealed to said enclosure cover without back venting to the external environment and having air port access to said microphone, valve means contained within said enclosure cover, said valve being adjustable between a pneumatically sealed position for permitting recorded voice and data transmission and an open position for permitting live voice transmission, whereby ambient noise is excluded from the handset microphone during data and recorded voice transmission.

Claim 3

An acoustic coupler for semipermanent attachment to a telephone handset microphone cover for transmitting recorded voice and tone encoded data over voice grade switched telephone networks, comprising: an enclosure cover having a data transmission port and a plurality of voice transmission ports, a dynamic speaker pneumatically sealed to said enclosure cover over the outside opening of said data transmission port, without back venting to the outside environment, clamping means and gasket means for pneumatically sealing said enclosure cover to said telephone handset, annular gasket means mounted on said cover and circumscribing said voice ports, annular baffle means cooperating with said annular gasket means for pneumatically sealing said voice ports when in the data transmission mode, and handle means for releasing said baffle means to open said voice ports when in the live voice transmission mode.

Claim 4

An acoustic coupler for semipermanent attachment to a telephone handset microphone cover for transmitting recorded voice and tone encoded data over voice grade switched telephone networks, comprising: an enclosure cover having a data transmission port and a plurality of voice transmission ports, a dynamic speaker pneumatically sealed to said enclosure cover over the outside opening of said data transmission port, without back venting to the outside environment, clamping means and gasket means for pneumatically sealing said enclosure cover to said telephone handset, annular gasket means mounted on said cover and circumscribing said voice ports, annular baffle means cooperating with said annular gasket means for pneumatically sealing said voice ports when in the data transmission mode, and handle means for releasing said baffle means to open said voice ports when in the live voice transmission mode.

Claim 5

An acoustic coupler for semipermanent attachment to a telephone handset microphone cover for transmitting recorded voice and tone encoded data over voice grade switched telephone networks, comprising: an enclosure cover having a data transmission pOrt and a live voice transmission port means, a dynamic speaker pneumatically sealed to said enclosure cover over the outside opening of said data transmission port, without back venting to the outside environment, clamping means and gasket means for pneumatically sealing said enclosure cover to said handset cover, rotor means rotatably mounted on said enclosure cover over said voice port means and having second live voice transmission port means, said second port means being aligned with said voice port means when in the live voice transmission mode, and second gasket means for pneumatically sealing said voice port means when said rotor is rotated into the data transmission mode.

Claim 6

An acoustic coupler for semipermanent attachment to a telephone handset microphone cover for transmitting recorded voice and tone encoded data over voice grade switched telephone networks, comprising: an enclosure cover having a data transmission pOrt and a live voice transmission port means, a dynamic speaker pneumatically sealed to said enclosure cover over the outside opening of said data transmission port, without back venting to the outside environment, clamping means and gasket means for pneumatically sealing said enclosure cover to said handset cover, rotor means rotatably mounted on said enclosure cover over said voice port means and having second live voice transmission port means, said second port means being aligned with said voice port means when in the live voice transmission mode, and second gasket means for pneumatically sealing said voice port means when said rotor is rotated into the data transmission mode.

Claim 7

The acoustic coupler of claim 3 characterized in that said second gasket means comprises three O-ring seals whereby in the data transmission mode the clamping force between said rotor and said enclosure cover is evenly distributed to enhance the pneumatic sealing of said voice port means.