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Figure 1,--Back and front view of assembled speaker in the foreground and, in the background, a dis- 
(C) metalized Mylar diaphragm, 
assembled speaker showing (A) aluminum body, (B) adjustment bolt, 
(D) Plexiglas backplate, (E) brass backplate, and (F) Plexiglas cup, 
6-32 TAP 
6 HOLES 
60° APART 
Von 
, 
‘ | 
, 
tL 
Ls 
(METALIZED MYLAR) 
— ALUMINUM BODY 
“——— DIAPHRAGM 
=> BACKPUATE 
BRASS) 
(SINTERED 
———— ed, 
a PLASTIC BACKPLATE 
Tiare a —_— PLEXIGLAS CUP 
ADJUSTMENT BOLT 
4-281" 
16 THREAD 
3/8" 
Figure 2,--A detailed drawing of the ultrasonic speaker components, A cross-sectional view of 
the aluminum body is shown at the bottom of the drawing, The 1/2-inch-diameter adjustment 
-long Allen-type head bolts hold the Plexiglas 
bolt is threaded 13 threads per inch, One-inch 
cup against the aluminum body, 
