.~ Predetermined center frequency selector (e.g., push-button control)
DEFINITION
Classification: 334/29
(under subclass 17) Subject matter wherein the electromagnetic operator is connected to or controlled by a position or sensing means which acts to position the variable reactance tuning unit in a predetermined position upon being actuated.
(1) Note. The motor control circuit is usually energized by a plurality of push button switches with each of the switches representing a preselected frequency (i.e., a television tuner driven by a motor). The motor once energized drives the tuner element to the proper position to tune in the desired frequency and then the motor is automatically turned off.
SEE OR SEARCH THIS CLASS, SUBCLASS:
7, for push button and/or lever operated tuners of the mechanical type which may tune in predetermined frequencies.
21, for motor operated band scanning or selector circuits which selects a predetermined frequency such as, for example, the strongest signal found within the band scanned.
SEE OR SEARCH CLASS 318, Electricity: Motive Power Systems,
466+, for motor systems with movement, position or limit-of-travel sensing means. Also see subclasses 560+, for position servomechanisms.
