Coldproof reflex horn speaker

Details Coldproof reflex horn speaker Coldproof reflex horn speaker

1980-06-10

1982-02-23

Stellar, George G.

179 1E, H04R 100, H04R 906

Patent

active

043170099

ABSTRACT:
A coldproof reflex horn speaker comprising a frame, a magnet mounted thereto, a diaphragm having a voice coil in its periphery, and inner and outer horns, which is provided with an electric heater device disposed to the outer horn in order to prevent ice and snow from being frozen thereon in cold circumstances.

REFERENCES:
patent: 2058555 (1936-10-01), Betts et al.
patent: 2588086 (1952-03-01), Cole

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