US PATENT SUBCLASS 335 / 290
.~.~.~ With circuit control means

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


335 /   HD   ELECTRICITY: MAGNETICALLY OPERATED SWITCHES, MAGNETS, AND ELECTROMAGNETS

209  DF  MAGNETS AND ELECTROMAGNETS {10}
285  DF  .~ Work or object holding type {4}
289  DF  .~.~ Electromagnet type (e.g., electromagnetic chuck) {2}
290.~.~.~ With circuit control means

DEFINITION

Classification: 335/290

(under subclass 289) Subject matter wherein the electromagnet type work holder includes means to control the magnetic flux of the electromagnet such as, for example, shunt means or circuit controlling switch means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

237, for magneto-mechanical motive device type electromagnet with adjustable shunt path.

295, for permanent magnet type work holding device with magnetic hold control means.

SEE OR SEARCH CLASS

361, Electricity: Electrical Systems and Devices,

139+, for control circuits for an electromagnetic chuck.