Title:
TELEPHONE ADAPTER
Document Type and Number:
Japanese Patent JPS5417605
Kind Code:
A
Abstract:
A telephone adapter for hands-free telephony, adapted for use with a telephone handset having structure including an earpiece, comprising: a transmit signal path comprising, in series, a microphone, amplification means, disabling means and a transducer; a receive signal path having means for amplifying sound energy from said earpiece, said receive path comprising, in series, a coupler, amplification means, disabling means and speaker means; bias means for maintaining said transmit path in an active state when no signals are present; and, means for interrupting said circuit paths in a complementary manner.
Inventors:
ABURAMU NASANIERU SUPANERU
REONAADO EFU SHIEPAADO
REONAADO EFU SHIEPAADO
Application Number:
JP7310778A
Publication Date:
February 09, 1979
Filing Date:
June 16, 1978
Export Citation:
Assignee:
SPANEL ABRAM NATHANIEL
International Classes:
H04M1/21; H04M1/215; H04M1/60; (IPC1-7): H04M1/21
Domestic Patent References:
| JPS50126106A | 1975-10-03 | |||
| JP41015643A |