US PATENT SUBCLASS 250 / 224
.~.~.~.~ Article and light ray relatively moved during sensing

Current as of: June, 1999
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250 /   HD   RADIANT ENERGY

200  DF  PHOTOCELLS; CIRCUITS AND APPARATUS {11}
216  DF  .~ Optical or pre-photocell system {11}
221  DF  .~.~ Controlled by article, person, or animal {1}
222.1  DF  .~.~.~ Inanimate article {3}
224.~.~.~.~ Article and light ray relatively moved during sensing

DEFINITION

Classification: 250/224

(under subclass 222) Subject matter having means for causing relative movement between the inanimate article and the light ray while the article is in the light path between light source and photocell.

(1) Note. The motion referred to above is one above and beyond that required to bring the object into the testing or sensing station. During sensing, either the object, light

source, photocell or some other part of the optical system may move.

(2) Note. As an illustrative example, this subclass includes camera shutter photocell sensing devices, where the camera shutter opens and closes while in the light beam and roller photocell sensing devices, where the roller is rotated while being sensed for size.

SEE OR SEARCH THIS CLASS, SUBCLASS:

223, for similar subject matter where the inanimate article is moved through the sensing station by a conveyor.

559.01+, and 566+, for similar subject where the object is a coded record or a web, strand, strip or sheet which is conveyed to the sensing point.