Oscillators – With magnetically controlled space discharge device – With frequency adjustment
Patent
1979-01-31
1980-11-18
Grimm, Siegfried H.
Oscillators
With magnetically controlled space discharge device
With frequency adjustment
315 3961, 331178, 333226, H01P 704, H03B 910, H03B 2300
Patent
active
042348552
ABSTRACT:
A resonant cavity of a microwave generator, such as a magnetron oscillator, is provided with a tuning piston which is displaceable between two terminal positions, corresponding to respective limiting frequencies f.sub.1 and f.sub.2, by means of a rotating crankshaft to which the piston is coupled by a linkage including a pitman with a substantially linearly guided extremity remote from the crankshaft axis. The length p of the pitman, measured between the pivotal axes of its extremities, is related to the eccentricity e of the crankshaft by the expression ##EQU1## where q is the length of the stroke of the linearly guided extremity between its extended dead-center position and an intermediate position in which the operating frequency of the generator has its mean value (f.sub.1 +f.sub.2)/2. With this dimensioning, the frequency varies as a sinusoidal function of the crankshaft angle and is therefore proportional to the output voltage of an angle sensor coupled with the crankshaft.
REFERENCES:
patent: 3414761 (1968-12-01), Glenfield
patent: 3441794 (1969-04-01), Chun
patent: 3441795 (1969-04-01), Hynes et al.
patent: 3590313 (1971-06-01), Stoke
patent: 3852638 (1974-12-01), Stoke
Busacca Guido
Luparello Pietro
Marranca Lucio
Sanfilippo Michele
Grimm Siegfried H.
Ross Karl F.
Societa Italiana Telecomunicazioni Siemens S.p.A.
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