(under subclass 282) Apparatus comprising a means to sense a condition which may or may not occur, or a lack of such condition, or the result of such condition, the sensing means causing or permitting operation of a separate means for controlling said cleaning agent applying means, said constituent removing means or said accumulation preventing means, without the intervention of a human attendant.
(1) Note. An example of an automatic means under this definition is a device in which a diaphragm, responding to a differential pressure across the media, an increased pressure upstream of the media or a decreased pressure downstream of the media, moves a stem attached to the diaphragm to open a valve for applying a cleaning agent to the media.
An example of means which is not automatic control under this definition is a motor or clock driven cam which controls the valve for applying a cleaning agent at predetermined times or revolutions.
