Oscillators – With electromagnetic or electrostatic shield
Patent
1979-07-03
1982-07-06
Grimm, Siegfried H.
Oscillators
With electromagnetic or electrostatic shield
310317, 331 68, 331116R, 333 12, H03B 536
Patent
active
043385761
ABSTRACT:
Noise potentials and radiation in an ultrasonic nebulizer are reduced by separating the oscillator and power supply and shielding the former, with one of the DC power lines to the oscillator passing through an aperture in the metal casing that shields the oscillator, while the other power supply line is connected to that casing. Oscillator control may be achieved by an unshielded variable resistor coupled by conductors of extended length to the oscillator by a filter circuit.
REFERENCES:
patent: 1994905 (1935-03-01), Bowles
patent: 2296678 (1942-09-01), Linder
patent: 2404640 (1946-07-01), Lawrance
patent: 3278862 (1966-10-01), Danzer
patent: 3528032 (1970-09-01), Tahmisian, Jr. et al.
patent: 4054848 (1977-10-01), Akita
patent: 4152671 (1979-05-01), Tuma et al.
Mitsui Sadao
Takahashi Minoru
Grimm Siegfried H.
Scobey Robert
TDK Electronics Co. Ltd.
Westin Edward P.
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