Acoustics – Diaphragm and enclosure – Moisture proof
Patent
1976-04-28
1978-01-31
Tomsky, Stephen J.
Acoustics
Diaphragm and enclosure
Moisture proof
181167, 181199, H05K 500, A47B 8106
Patent
active
040711110
ABSTRACT:
A weatherproof loudspeaker assembly includes a box-like one-piece open-front plastic housing and a corrugated fiberboard member folded so as to line the inside of the housing with two crossed layers of corrugations on each of the walls surrounding the open front. A plastic grille plate has a plurality of slots therethrough separating forwardly projecting vanes, and a loudspeaker has a water-repellent front portion including a peripheral mounting and sealing flange mounted in watertight sealing engagement with the rear of the grille plate in surrounding relationship with the slots by means of plastic posts extending from the grille plate through holes in the loudspeaker flange and melted in place to form a rivet-like fastening. The grille plate is screwed to the housing or ultrasonically shear-welded to the housing around the entire perimeter of the open front for closing same with the loudspeaker disposed within the corrugated member and with loudspeaker lead wires extending through a hole in the bottom of the housing. A plastic mounting plate is disposed in a recess in the outer surface of the housing bottom surrounding the hole and has an energy-directing ridge which is ultrasonically welded to the housing completely around the hole and the lead wires. The housing is molded of material blown with a blowing agent to prevent sinks.
REFERENCES:
patent: 1377677 (1921-05-01), Gelbert
patent: 2003908 (1935-06-01), Smith et al.
patent: 2829728 (1958-04-01), Brown
patent: 3037577 (1962-06-01), Steglich
patent: 3391754 (1968-07-01), Montanaro
patent: 3731760 (1973-05-01), Hammes
patent: 3938618 (1976-02-01), Ambruoso
patent: 3941207 (1976-03-01), Croup
patent: 3946832 (1976-03-01), Takano et al.
Acoustic Fiber Sound Systems, Inc.
Tomsky Stephen J.
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