Wave transmission lines and networks – Coupling networks – Delay lines including elastic bulk wave propagation means
Patent
1978-06-12
1980-04-01
Yasich, Daniel M.
Wave transmission lines and networks
Coupling networks
Delay lines including elastic bulk wave propagation means
116205, 219413, 310335, 116137A, G01D 2100, H01P 102, H03H 730
Patent
active
041964063
ABSTRACT:
A control device includes a housing having a serpentinely disposed channel and a cover, secured to the housing, which converts the channel into an ultrasonic waveguide. One end of the waveguide is bounded by a stationary reflector and the other end of the waveguide communicates with a bore which holds a piezoelectric device matched to the waveguide so as to provide therein, when actuated, a propagating transverse wave in the ultrasonic frequency range. The cover includes three elongated slots, each of which slidably supports a different reflector unit. Each unit has a reflector extending into the waveguide and can be positioned anywhere along its corresponding slot. Actuation of the piezoelectric transducer by an electrical pulse causes an ultrasonic pulse to propagate down the waveguide and parts thereof are reflected back to the transducer where an electrical group of pulse signals are caused to appear. Each signal of the group is delayed with respect to the applied signal, the delay of each signal being related to the position of a different one of the reflectors.
REFERENCES:
patent: 2407294 (1946-09-01), Shockley et al.
patent: 2505364 (1950-04-01), McSkimin
patent: 2826745 (1958-03-01), Page
patent: 2979022 (1961-04-01), Adel
patent: 3145355 (1964-08-01), Wright
patent: 3834233 (1974-09-01), Willis et al.
patent: 3935485 (1976-01-01), Yoshida et al.
patent: 3940637 (1976-02-01), Ohigashi et al.
General Electric Company
Nieves Carlos
Platt Leonard J.
Powers George R.
Yasich Daniel M.
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