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US 4,912,398 AGranted
Moving iron instrument
OwnerYuji Kawaiinventor
Life of this patent
Estimating the term…
Abstract
A moving iron instrument comprising a cylinder divided into two parts, a cylinder member to which a fixed iron vane is attached, and a frame member for holding a moving shaft to which a moving iron vane is attached, wherein the two members are made of an insulating material.
Claims10
A moving iron instrument comprising
- a cylinder;
- a fixed iron vane;
- a moving iron vane;
- a moving shaft having said moving iron vane attached thereto and disposed inside said cylinder having said fixed iron vane;
- wherein
- said cylinder comprises
- a cylinder member made of an insulating material and to which said fixed iron vane is attached, and
- a frame member made of an insulating material and to which said moving shaft is held, said frame member being movably fitted within said cylinder member, whereby adjustment of the relative position between the moving iron vane and the fixed iron vane is achieved by rotating the cylinder member relative to the frame member.
5 more elements
A moving iron instrument comprising
- a moving section comprising a moving shaft having pivots at both ends thereof, a pointer secured to said moving shaft, and a moving iron vane attached to said moving shaft;
- a frame member made of plastic, comprising a member having a bridge to which an upper jeweled screw is attached, a member to which a lower jeweled screw is attached, and a stem portion for connecting said two members, wherein said moving section is held to be rotatable between said upper and said lower jeweled screws;
- a cylinder member made of plastic and formed as a cylindrical body, wherein a fixed iron vane different in size from said moving iron vane is attached to an outer side of the cylindrical body, said lower jeweled screw being inserted to be rotatable within a cylindrical space of said cylinder member so that said fixed iron vane faces toward said moving iron vane;
- a cylindrical field coil covered with a shield, wherein said cylinder member is insulated within a cylindrical space thereof;
- and
- means for guiding which allow said cylinder member to rotate with respect to said frame member such that the relative position of said moving iron vane and said fixed iron vane is changed thereby adjusting the sensitivity of said instrument.
3 more elements
Dependencies are inferred from the claim text.