Acoustic transducer of improved construction

Details Acoustic transducer of improved construction Acoustic transducer of improved construction

1979-01-08

1981-06-09

Brown, Thomas W.

29594, 179184, H04R 1100, H04R 3100

Patent

active

042726549

ABSTRACT:
An improved transducer construction of the type having a U-shaped armature mounted to have a vibrating arm extending through the tunnel of a cooperating coil. The arms of the armature are joined by a smooth bend to provide improved shock-resistant characteristics. The coil is initially located and properly positioned relative to the arm extending through the tunnel by means of shims. The transducer includes a case comprising a cup, and a cover for the cup, both being of a magnetic material. The cup and cover are joined together by welding to insure low reluctance flux paths therebetween to retain the magnetic fields developed by the transducer within the casing.

REFERENCES:
patent: 1156898 (1915-10-01), Gravell
patent: 1871739 (1932-08-01), Ringel
patent: 2163161 (1939-06-01), Wadsworth
patent: 2251001 (1941-07-01), Quam
patent: 3092694 (1963-06-01), Walczak
patent: 3432622 (1969-03-01), Sebesta et al.
patent: 3491436 (1970-01-01), Carlson
patent: 3588383 (1971-06-01), Carlson et al.

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