(0)H03J:1/1:
IPC6
SECTION H - ELECTRICITY
TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
H03J
2/2
<<   >>   H03J005/00 - H03J009/04  

5
/ 00 Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner (H 03 J 7/00, H 03 J 9/00 take precedence; for bandspreading H 03 J 3/10) [3]

5
/ 02 • with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings  

5
/ 04 • • operated by hand  

5
/ 06 • • • Settings determined by single indexing means with snap action  

5
/ 08 • • • Settings determined by a number of separately-actuated positioning means  

5
/ 10 • • • Settings determined by a number of positioning means mounted on a common support, which is adjustable to desired positions, a different positioning means being in operation in each position  

5
/ 12 • • • Settings determined by a number of separately-actuated driving means which adjust the tuning element directly to desired settings  

5
/ 14 • • operated by auxiliary power  

5
/ 16 • • • Settings determined by a number of separate positioning means actuated by hand  

5
/ 18 • • • Settings determined by a number of separate positioning means actuated by electromagnets  

5
/ 20 • • • Settings determined by a number of positioning means actuated by a second means adjustable to different positions by the same or by a second auxiliary power  

5
/ 22 • • • Settings determined by a number of separately actuated driving means which adjust the tuning element directly to desired settings  

5
/ 24 • with a number of separate pretuned tuning circuits or separate tuning elements selectively brought into circuit, e.g. for waveband selection, for television channel selection (switches in general H 01 H)  

5
/ 26 • • operated by hand  

5
/ 28 • • • Tuning circuits or elements supported on a revolving member with contacts arranged in a plane perpendicular to the axis  

5
/ 30 • • • Tuning circuits or elements supported on a revolving member with contacts arranged in lines parallel to the axis  

5
/ 32 • • • Stationary tuning circuits or elements selected by push-button  
 

 7
/ 00 Automatic frequency control; Automatic scanning over a band of frequencies [3]

7
/ 02 • Automatic frequency control (H 03 J 7/18 takes precedence; automatic tuning control for television receivers H 04 N 5/50) [3]  

7
/ 04 • • where the frequency control is accomplished by varying the electrical characteristics of a non-mechanically adjustable element or where the nature of the frequency controlling element is not significant [3]  

7
/ 06 • • • using counters or frequency dividers [3]  

7
/ 08 • • • using varactors, i.e. voltage variable reactive diodes (H 03 J 7/06 takes precedence) [3]  

7
/ 10 • • • • Modification of automatic frequency control sensitivity or linearising automatic frequency control operation [3]  

7
/ 12 • • • • Combination of automatic frequency control voltage with stabilised varactor supply voltage [3]  

7
/ 14 • • • Controlling the magnetic state of inductor cores (H 03 J 7/06 takes precedence) [3]  

7
/ 16 • • where the frequency control is accomplished by mechanical means, e.g. by a motor [3]  

7
/ 18 • Automatic scanning over a band of frequencies [3]  

7
/ 20 • • where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element [3]  

7
/ 22 • • • in which an automatic frequency control circuit is brought into action after the scanning action has been stopped (H 03 J 7/24 takes precedence) [3]  

7
/ 24 • • • using varactors, i.e. voltage variable reactive diodes (H 03 J 7/28 takes precedence) [3]  

7
/ 26 • • • • in which an automatic frequency control circuit is brought into action after the scanning action has been stopped [3]  

7
/ 28 • • • using counters or frequency dividers [3]  

7
/ 30 • • where the scanning is accomplished by mechanical means, e.g. by a motor [3]  

7
/ 32 • • with simultaneous display of received frequencies, e.g. panoramic receivers [3]  
 

 9
/ 00 Remote-control of tuned circuits; Combined remote-control of tuning and other functions, e.g. brightness, amplification (mechanical remote-control arrangements H 03 J 1/00) [3]

9
/ 02 • using radio transmission; using near-field transmission [3]  

9
/ 04 • using ultrasonic, sonic or infrasonic waves [3]  

9
/ 06 • using electromagnetic waves other than radio waves, e.g. light [3]  

 

 

 
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