Telephonic communications – Terminal – Housing or housing component
Patent
1985-08-20
1988-08-16
Ng, Jin F.
Telephonic communications
Terminal
Housing or housing component
379 52, 379422, 381 682, 381 98, H04R 103, H04R 122, H04R 2500, H03G 502
Patent
active
047649577
ABSTRACT:
An earpiece comprises a suction cup sensor, a preamplifier, a potentiometer for varying the gain of the amplifier, a pass band filter and electronic means enabling the user to adjust the central frequency and/or the width of the pass band of the filter. One application of the invention is the construction of self-contained and individualized telephone handsets or headphones which may be connected without any wire connection on any telephone set.
REFERENCES:
patent: 2167462 (1939-07-01), Rechnitzer
patent: 2186072 (1940-01-01), Huth
patent: 2411190 (1946-11-01), Brown
patent: 2659772 (1953-11-01), O'Hara
patent: 2778889 (1957-01-01), Hausdorf
patent: 3101390 (1963-08-01), Maille
patent: 3784750 (1974-01-01), Stearns et al.
patent: 3818149 (1974-06-01), Stearns et al.
patent: 3849602 (1974-11-01), Gendin
patent: 4119814 (1978-10-01), Harless
patent: 4293937 (1981-10-01), Sharp et al.
patent: 4298970 (1981-11-01), Shawhan et al.
patent: 4320473 (1982-03-01), Smither et al.
patent: 4321680 (1982-03-01), Bertrand et al.
patent: 4489610 (1985-12-01), Slavin
patent: 4596899 (1986-06-01), Wojcik et al.
1981 IEEE International Symposium on Circuits and Systems Proceedings, vol. 1 of 3, Apr. 27-29, 1981, pp. 303-306, Chicago, US; W. Brandenbusch: "Multiple Parameter Tunable Active Integrator Filters".
Angelini Theophile M.
Canevet Georges
Foti Marc S.
Santon Francois C.
Byrd Danita R.
Centre National de la Recherche Scientifique-C.N.R.S.
Ng Jin F.
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