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United States Patent  D249,509
Henricksen  September 19, 1978 
Acoustical transformer for coupling sound waves from the diaphragm to the throat of a horn-type loudspeaker
Claims
The ornamental design for a accoustical transformer for coupling sound waves from the diaphragm to the throat of a horn-type loudspeaker, as shown. 
 
Inventors:  Henricksen; Clifford A. (Yorba Linda, CA) 
Assignee:  Altec Corporation (Anaheim, CA) 
Appl. No.:  725981
Filed:  September 23, 1976
 
Current U.S. Class: D14/222; 181/159 
Intern'l Class:  D1401/; D1499/
Field of Search:  181/156,158,166,159,185 D14/37 
References Cited [Referenced By]
U.S. Patent Documents
 
2037187 Apr., 1936 Wente 181/159. 
2183528 Dec., 1939 Blackburn 181/159. 
2858377 Oct., 1958 Levy 181/159. 
2942071 Jun., 1960 Witchey 181/159. 
3852529 Dec., 1974 Schafft 179/1. 

Primary Examiner: Ansher; Bernard
Attorney, Agent or Firm: Sokolski; Edward A.

Description

FIG. 1 is a top plan view of the accoustical transformer for coupling sound waves from the diaphragm to the throat of a horn-type loudspeaker showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is a side elevational perspective view thereof; and

FIG. 5 is a side elevational perspective view thereof taken from the side opposite to that shown in FIG. 4.

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