Multipurpose headset amplifier

Details Multipurpose headset amplifier Multipurpose headset amplifier

1989-12-01

1991-10-15

Ng, Jin F.

Telephonic communications

Terminal accessory or auxiliary equipment

With circuit connection to terminal

379430, 379395, H04M 100

Patent

active

050581554

ABSTRACT:
A multipurpose headset amplifier for the connection of a headset (11) to a telephone instrument comprises a housing (5) having an ascending, thready holder (10) for a headset (11) and connection jacks (21, 22, 23) for the headset (11), the telephone instrument (22) and for the telephone instrument's handset, the housing having at the upper side comprises manuel operating members (6, 7, 8) for the adjustment of the device, and manual controls (15) at the underside for the adaptation of a headset to the impedance and signal level of any telephone instrument. The amplifier comprises an internal power supply (12) and a jack (13) for external power supply. The amplifier is furthermore provided with a microphone switch having a light-emitting diode (9), a volume control (7) and a switch (6).

REFERENCES:
patent: 3742153 (1973-06-01), Matsuda et al.
patent: 4162374 (1979-07-01), Girard et al.
patent: 4696032 (1987-09-01), Levy
patent: 4754484 (1988-06-01), Larkin et al.
patent: 4782524 (1988-11-01), McQuinn et al.
patent: 4918726 (1990-04-01), Snyder
patent: 4930148 (1990-05-01), Lee
patent: 4930156 (1990-05-01), Norris
patent: 4951002 (1990-08-01), Hanan

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