US Patent Class 334
TUNERS



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Current as of: June, 1999
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  DF  CLASS NOTES
1  DF  COMBINED DIVERSE-TYPE TUNERS
2  DF  .~ With plural diverse disk or plural diverse cylinder-type turret tuners
3  DF  .~ With mutual tuning element
4  DF  MAGNETIC FIELD-RESPONSIVE TUNER
5  DF  CONDITION-RESPONSIVE (E.G., TEMPERATURE COMPENSATION)
6  DF  .~ With condition-responsive inductor or capacitor
7  DF  PUSH BUTTON AND/OR LEVER-TYPE MECHANICALLY OPERATED TUNER
8  DF  REMOTELY CONTROLLED TUNER
9  DF  .~ With electromagnetic operator
10  DF  .~.~ Solenoid or relay operator
11  DF  TUNER UNIT DIRECTLY RESPONSIVE TO VOLTAGE AND/OR CURRENT VARIATION
12  DF  .~ Saturable core-type inductor
13  DF  .~.~ Automatic frequency-centering circuit
14  DF  .~ Reactance tuning
15  DF  .~.~ Semiconductor reactance circuit
16  DF  .~.~ Automatic frequency-centering circuit
17  DF  TUNER UNIT WITH ELECTROMAGNETIC OPERATOR
18  DF  .~ Band scanning or selector circuit
19  DF  .~.~ Solenoid or relay-operated tuner means
20  DF  .~.~ Motor-operated
21  DF  .~.~.~ Predetermined frequency selector
22  DF  .~.~.~ With reversing means
23  DF  .~.~.~ Clutch means
24  DF  .~.~.~ Relay-controlled
25  DF  .~.~.~.~ Plural relays
26  DF  .~ Automatic frequency-centering circuit
27  DF  .~.~ Tool-driven aligning apparatus
28  DF  .~.~ Plural signal sources
29  DF  .~ Predetermined center frequency selector (e.g., push-button control)
30  DF  WITH RESONANCE INDICATOR
31  DF  .~ Meter type
32  DF  .~.~ With optical and/or shading device
33  DF  .~ Cathode ray type
34  DF  .~.~ Magic eye
35  DF  .~.~.~ Plural shadows
36  DF  .~ Lamp type
37  DF  .~.~ Glow discharge
38  DF  WITH REACTOR ELEMENT WINDING AND UNWINDING COMBINED
39  DF  COMBINED
40  DF  SENSITIVITY OR "Q" ADJUSTMENT MEANS IN TUNED CIRCUITRY
41  DF  WITH RESONANT LINE ELEMENTS
42  DF  .~ Plural-operated tuning units
43  DF  .~.~ With shaft operator
44  DF  .~ Deformable
45  DF  .~ With lumped capacitor in tuned circuit
46  DF  WITH COMPRESSIBLE OR DEFORMABLE-TYPE TUNER
47  DF  WITH SWITCHING MEANS
48  DF  .~ Tuner switch rockable for fine tuning
49  DF  .~ Disk-type turret tuner
50  DF  .~ Drum or cylinder-type turret tuner
51  DF  .~.~ With vernier tuning means
52  DF  .~ Switch operated by variable tuning means
53  DF  .~.~ Rectilinearly operated switch
54  DF  .~ Rectilinearly operated switch
55  DF  .~ Capacitor only modified or substituted by switching
56  DF  .~ Inductor only modified or substituted by switching
57  DF  .~.~ With vernier tuning means
58  DF  .~.~.~ Variable capacitor
59  DF  .~ Tuned transformer circuit substituted by switching
60  DF  .~.~ Tuned circuit shorted by switch
61  DF  MUTUAL INDUCTANCE VARIABLE MEANS
62  DF  .~ Variometer
63  DF  .~ Plural coils having common adjustable core
64  DF  SERIES TUNED CIRCUIT
65  DF  INDUCTOR AND CAPACITOR BOTH VARIABLE
66  DF  .~ With variable inductor and capacitor structure in common
67  DF  .~.~ Butterfly-type tuner
68  DF  .~.~ Rectilinearly movable reactance adjusting elements
69  DF  .~ Inductor and capacitor simultaneously varied
70  DF  .~.~ Core tuned inductor
71  DF  VARIABLE INDUCTOR TUNED
72  DF  .~ Movable contact adjustable over length of inductor
73  DF  .~.~ With capacitor-type contact
74  DF  .~ Adjustable core type
75  DF  .~.~ With inductor wound in particular shape
76  DF  .~.~ With particular shape and/or type of core
77  DF  .~.~ Gang-operated
78  DF  VARIABLE CAPACITOR TUNED
79  DF  .~ Straight-line frequency type
80  DF  .~ With variable spacing between plates
81  DF  .~ Rectilinearly sliding plates
82  DF  .~ With particular shape and/or arrangement of plates
83  DF  .~ Gang-operated capacitors
84  DF  .~ Capacitor drive means
85  DF  WITH SHIELDING OR HOUSING MEANS
86  DF  WITH INDICATOR
87  DF  .~ Band-switching
88  DF  WITH STOP OR POSITIONING MEANS (E.G., DETENTS)
89  DF  MISCELLANEOUS