Electricity: measuring and testing – Magnetic – Displacement
Reexamination Certificate
2006-03-28
2006-03-28
Ledynh, Bot (Department: 2862)
Electricity: measuring and testing
Magnetic
Displacement
C324S207240, C324S207250, C340S870360
Reexamination Certificate
active
07019514
ABSTRACT:
A rotary input for a linear variable differential transformer (LVDT) system connects to a gear reduction system. The gear reduction produces a reduced rotary output in a rotary output member. The output member is threaded, and a nut is threaded onto the output member. Therefore, the nut translates as the rotary output member rotates. The armatures of one or more LVDTs attach to the nut. Each armature contains a magnetic member. As the nut translates along the threaded output member, the nut translates the armatures. Armature movement moves the magnetic members to create a differential voltage between the secondary coils of the LVDT.
REFERENCES:
patent: 2445445 (1948-07-01), Rights et al.
patent: 4777436 (1988-10-01), Fiori, Jr.
patent: 5006797 (1991-04-01), Smith
patent: 5289120 (1994-02-01), Moretti et al.
patent: 5469053 (1995-11-01), Laughlin
patent: 5547290 (1996-08-01), Ouchi et al.
Jeffer Mangels Butler & Marmaro LLP
Kavlico Corporation
Ledynh Bot
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