Channel selecting shaft mounting arrangement for UHF tuners

Details Channel selecting shaft mounting arrangement for UHF tuners Channel selecting shaft mounting arrangement for UHF tuners

1975-04-15

1977-08-23

Scott, Samuel

Machine element or mechanism

Shaft operators

Plural speed

74102, 74 1041, 64 30LB, 192 67R, 1161241R, F16H 3518

Patent

active

040432068

ABSTRACT:
In arrangement of a channel selecting device used for a UHF tuner of the continuously variable type, a taper clutch is employed for transmitting the rotation of the detented selector shaft to the output drive gear which is secured to the fine tuning shaft positioned inside the selector shaft. The taper clutch is formed by engagement of the annular inner surface of a hollow portion in the end of the selector shaft and the annular outer surface of a hub member of the fine tuning shaft, each of surfaces has a taper angle (2.theta.) in the range of about 20.degree. to 9.degree. to frictionally couple the selector shaft and the drive gear, and is coated with a layer of lubricant materials to permit the rotation of the fine tuning shaft independent of the selector shaft. This taper clutch provides stable and smooth operation in the extended temperature range and without any undesired creep between the selector shaft and the fine tuning shaft.

REFERENCES:
patent: 2046910 (1936-10-01), Barrett
patent: 2643531 (1953-06-01), Hayes
patent: 2655811 (1953-10-01), Behrens
patent: 3333477 (1967-08-01), Denkowski
patent: 3774459 (1973-11-01), Valdettaro
patent: 3844176 (1974-10-01), Valdettaro

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