Signals and indicators

SECTION I - CLASS DEFINITION

(A) This class is limited to mechanical, as distinguished from electrical, devices for giving signals of the nature of either alarms or indicators, which signals are generally due to some movement of some part or element from a normal or nonsignaling or signal-controlling position. The signal may be of any type which appeals to any one or more of the senses, but is generally a bell, horn, whistle, semaphore, light-shutter, explosive device, pointer, or flag. Methods are classified in the appropriate subclasses with the signal devices unless specifically provided for by a method subclass.

(B) The patents of this class are divided into several main groups:

(1) Those for devices having combined functions, as signaling, and also some additional function, as igniting a lamp, fastening a door or window, etc.

(2) Those adapted for some special purpose, as code signaling, ships" telegraphs, vehicle motion and direction, street traffic, etc.