Did You Know...
...that in the early 1940s GE engineer James Wright was charged with a task of utmost importance to the war effort: develop a cheap substitute for rubber that could be used to produce tires, gas masks and a whole host of military gear. Wright tackled the task diligently -- and wound up inventing Silly Putty.
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US Patent 5270593 - Air cored, linear induction motor for magnetically levitated systems
US Patent Issued on December 14, 1993
Estimated Patent Expiration Date:
November 10, 2012Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
Estimated Patent Expiration Date:
November 10, 2012Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.AbstractApparatus for propelling, suspending and guiding a conveyance across ground without contact between said conveyance and said ground, comprising an electromagnetic, air cored induction motor including a primary formed of a coaxial array of coils; means for energizing said coils with polyphase electrical alternating currents to create an electromagnetic wave traveling longitudinally along the array; a secondary formed of a sleeve concentric to and surrounding said array of coils and made of conducting material, said sleeve being electromagnetically coupled to said primary and being cut along a longitudinal generatrix thereof to define a slot permitting the support means which supports the primary to pass there through. | InventorsApplicationNo. 974177 filed on 11/10/1992US Classes:310/12, Linear104/282, Propulsion means employed to suspend car104/292Propulsion by active guideway; e.g., linear synchronous motor, etc.Field of Search310/12, Linear310/14, Solenoid and core type310/13, Fixed and movable wound elements104/281, MAGNETICALLY SUSPENDED CAR104/282, Propulsion means employed to suspend car104/283, By permanent magnets only104/284, Including means to sense or control car position or attitude with respect to guideway104/292Propulsion by active guideway; e.g., linear synchronous motor, etc.ExaminersPrimary: Stephan, Steven L.Assistant: Jones, Judson H. Attorney, Agent or FirmUS Patent References4839543, Linear motorIssued on: 06/13/1989 Inventor: Beakley , et al.5085149Ground vehicle suspension and guidance and electromagnetic system thereof with multiple surface arcuate reaction rails Issued on: 02/04/1992 Inventor: Huson Foreign Patent References
International ClassesH02K 041/02B60L 013/04 |
