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US 4,609,894 AGranted
Tuning device
AssigneeCitizen Watch Co., Ltd.
InventorToshiaki Oguchi
Life of this patent
Estimating the term…
Abstract
A tuning device has a dial drum rotatably supported in a frame, and a rheostat operatively connected to the dial drum. A knob is disposed in alignment with the dial drum. The dial drum has an outer toothing formed on the periphery thereof. A drive gear is secured to the knob, and a reduction gear train is disposed between the drive gear and the outer toothing for transmitting the rotation of the drive gear to the dial drum.
Claims3
A tuning device comprising:
- a frame;
- a dial drum, rotatably supported in said frame, said dial drum having characters for tuning and having an outer toothing formed on the periphery thereof;
- a rheostat operatively connected to said dial drum;
- a knob having the rotational axis thereof in alignment with the rotational axis of said dial drum;
- a drive gear co-axially secured to said knob and rotatably supported in said dial drum;
- and
- a gear reduction train disposed between said drive gear and said outer toothing for transmitting the rotation of the drive gear to said drum, said gear reduction train comprising:
- a large diameter gear engaged with said drive gear;
- a small diameter gear engaged with said large diameter gear and disposed in an integral relationship with said large diameter gear;
- whereby the axis of rotation of each gear is parallel to the axis of rotation of said knob.
7 more elements
A tuning device comprising:
- a frame;
- a dial drum, rotatably supported in said frame, said dial drum having characters for tuning and having an outer toothing formed on the periphery thereof;
- a rheostat operatively connected to said dial drum;
- a supporting plate;
- a knob disposed external to said supporting plate such that the rotational axis thereof is in alignment with the rotational axis of said dial drum;
- a drive gear co-axially secured to said knob and rotatably supported in said dial drum and said supporting plate;
- a gear reduction train disposed between said drive gear and said outer toothing for transmitting the rotation of the drive gear to said dial drum.
4 more elements
A tuning device comprising:
- a frame;
- a dial drum, rotatably supported in said frame, said dial drum having characters for tuning and having an outer toothing formed on the periphery thereof;
- a rheostat operatively connected to said dial drum;
- a supporting plate;
- a knob disposed external to said supporting plate such that the rotational axis thereof is in alignment with the rotational axis of said dial drum;
- a drive gear co-axially secured to said knob and rotatably supported in said dial drum and said supporting plate;
- and
- a gear reduction train disposed between said drive gear and said outer toothing for transmitting the rotation of the drive gear to said dial drum, said gear reduction train comprising:
- a large diameter gear engaged with said drive gear;
- a small diameter gear engaged with said large diameter gear and disposed in an integral relationship with said large diameter gear.
7 more elements
Dependencies are inferred from the claim text.