With signal, scale, illuminator, or optical viewer:
(under subclass 700) Apparatus including, in addition to structure for performing a class type operation, either (1) means to produce a perceptible (e.g., audible or visual) manifestation of a condition of a part (or all) of the machine or the work; (2) means to designate a characteristic of the apparatus, the work, or the product; (3) means to increase the lighting intensity in the vicinity of the apparatus or the work; or (4) means to modify light waves to make characteristics of the apparatus, the work, or the product more readily discernable to the view of the operative.
