摘要 |
974,493. Measuring pressure electrically. WESTERN ELECTRIC CO.Inc. Nov.23, 1960 [Nov. 25, 1959], No. 40273/60. Heading G1N. Also in Divisions H1 and H3] The frequency of oscillation of the coaxial line oscillator shown in Fig. 6 comprising a tunnel diode 20 varied in response to pressure applied to diaphragm 26, which alters the negative resistance of the diode. Specification 966, 757 is referred to. |