US PATENT SUBCLASS 439 / 303
.~.~.~ Requiring destruction of lamp envelope

Current as of: June, 1999
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439 /   HD   ELECTRICAL CONNECTORS

296  DF  WITH COUPLING MOVEMENT-ACTUATING MEANS OR RETAINING MEANS IN ADDITION TO CONTACT OF COUPLING PART {15}
301  DF  .~ Retaining means requiring destruction of element before separation {1}
302  DF  .~.~ Threaded coupling part {1}
303.~.~.~ Requiring destruction of lamp envelope

DEFINITION

Classification: 439/303

Required destruction of lamp envelope:

(under subclass 302) Coupling part for use with or comprising the electrical connector of an illumination device including provision to require breakage of the glass bulb associated with the illumination device before the electrical connection can be broken.

(1) Note. Included herein is a theft preventing device that eliminates theft by making any lamp removed unusable.