Electric lamp and discharge devices: systems – Combined load device or load device temperature modifying... – Distributed parameter resonator-type magnetron
Patent
1986-03-12
1988-05-31
Chatmon, Saxfield
Electric lamp and discharge devices: systems
Combined load device or load device temperature modifying...
Distributed parameter resonator-type magnetron
315 3959, 315 3961, H01J 2550
Patent
active
047483792
ABSTRACT:
The invention relates to a tunable magnetron comprising a rotatable tuning element (10) projecting into a ring shaped interaction space between coaxially arranged cathode and anode systems. The tuning element (10) is driven by an electric motor (11) and produces upon rotation a periodic variation of the tuning. The tuning element (10) is situated within the evacuated space of the magnetron and the motor (11) in situated outside said space. The drive torque of the motor is then transferred to the tuning element via a coupling (12) having two active parts situated one on each side of the evacuated envelope (17) of the magnetron. Such a coupling can only transfer a limited torque. According to the invention the magnetron comprises means for limiting the torque which can be transferred to the coupling (12), both upon starting and stopping, for example a torque limiter (21-26) between the motor (11) and the coupling (12), whereby the start and stop procedures can be performed with optimum torque. Therefore starting and stopping of the tuning element (10), for example when switching between different fixed frequencies, can be made with maximum speed (FIG. 3).
REFERENCES:
patent: 3297909 (1967-01-01), Foreman et al.
patent: 3379925 (1968-04-01), Edwards
patent: 3564340 (1971-02-01), Bahr
patent: 3599035 (1971-08-01), Frerichs et al.
patent: 3671801 (1972-06-01), Masek
Chatmon Saxfield
Tamoshunas Algy
U.S. Philips Corporation
Wieghaus Brian J.
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