US PATENT SUBCLASS 266 / 93
.~.~.~ By means sensing presence or absence of work

Current as of: June, 1999
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266 /   HD   METALLURGICAL APPARATUS

78  DF  WITH CONTROL MEANS RESPONSIVE TO SENSED CONDITION {6}
90  DF  .~ With means responsive to condition of treated material {2}
92  DF  .~.~ By means sensing position of work {2}
93.~.~.~ By means sensing presence or absence of work

DEFINITION

Classification: 266/93

(under subclass 92) Device wherein the control means is responsive to the entrance or exit of the treated material from a particular position in the apparatus.

(1) Note. Devices which have means which sense the presence of a workpiece which has been conveyed to the device and which means actuate the device are classified herein.