The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 28, 2005
Filed:
Mar. 11, 2003
Frederick a Johnson, Sevenoaks, GB;
Frederick A Johnson, Sevenoaks, GB;
BAE SYSTEMS Electronics Limited, Farnborough, GB;
Abstract
A support actuatorcomprises an electro-magnethaving an input current, provided through a current controller, and which is arranged to generate a magnetic fieldhaving a variable intensity proportional to a variable currentsupplied by the controller. The intensity of the fieldis controlled to ensure that the magnetis separated from a support armaturearranged to carry a load by an operational gap A load cellis connected between the armatureand a mounting positionfor the armature. The cellproduces a control signalrepresenting variations in force generated by the magnetic fieldwhich acts on the load, and the signalis fed backward, along a feedback control pathto the controllerso as to control the variable currentsuch that it is made substantially equal to a gain demand force D.