Moving coil electrical instrument
First Claim
Patent Images
1. A moving coil electrical meter mechanism which comprises:
- a substantially rectangular coil;
a magnetic structure surrounding first, second, and third sides of the coil and defining first, second, and third magnetic flux filled air gaps whereinthe first and third sides of the coil are opposing sides of the rectangle and are located in the first and third air gaps, respectively, said first and third air gaps having therein oppositely-directed magnetic fields which are substantially perpendicular to said first and third coil sides, andthe second side of the coil, lying between the first and third sides, is located in the second air gap, said air gap having therein a magnetic field which is substantially perpendicular to said second coil side and orthogonal to the fields in the first and third air gaps, said magnetic field in said second air gap further having a direction such that the force exerted on the side of the coil located in the second air gap is in the same direction as the forces exerted on the sides of the coil located in the first and third air gaps, said magnetic structure comprisingfirst, second, and third permanent magnets each having a different orientation, anda core assembly of magnetically permeable materials magnetically connected to said first, second, and third permanent magnets to form first, second, and third magnetic circuits, said first, second, and third magnetic circuits providing magnetic flux for the first, second, and third air gaps, respectively;
means mounting the coil for rotational motion within said magnetic structure about an axis parallel to the second side of the coil; and
indicator means responsive to coil movement.
0 Assignments
0 Petitions
Accused Products
Abstract
A moving coil electrical meter mechanism has a substantially rectangular coil and a magnetic structure surrounding first, second and third sides of the coil and defining first, second and third magnetic flux filled air gaps containing magnetic fields so oriented that the forces exerted on the first, second and third sides of the coil are in the same direction. The rectangular coil is mounted to rotate under the influence of the magnetic fields around an axis adjacent to the fourth side of the coil, with the magnetic fields remaining orthogonal to the coil sides during rotation.
-
Citations
12 Claims
-
1. A moving coil electrical meter mechanism which comprises:
-
a substantially rectangular coil; a magnetic structure surrounding first, second, and third sides of the coil and defining first, second, and third magnetic flux filled air gaps wherein the first and third sides of the coil are opposing sides of the rectangle and are located in the first and third air gaps, respectively, said first and third air gaps having therein oppositely-directed magnetic fields which are substantially perpendicular to said first and third coil sides, and the second side of the coil, lying between the first and third sides, is located in the second air gap, said air gap having therein a magnetic field which is substantially perpendicular to said second coil side and orthogonal to the fields in the first and third air gaps, said magnetic field in said second air gap further having a direction such that the force exerted on the side of the coil located in the second air gap is in the same direction as the forces exerted on the sides of the coil located in the first and third air gaps, said magnetic structure comprising first, second, and third permanent magnets each having a different orientation, and a core assembly of magnetically permeable materials magnetically connected to said first, second, and third permanent magnets to form first, second, and third magnetic circuits, said first, second, and third magnetic circuits providing magnetic flux for the first, second, and third air gaps, respectively; means mounting the coil for rotational motion within said magnetic structure about an axis parallel to the second side of the coil; and indicator means responsive to coil movement. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A moving coil electrical meter mechanism which comprises:
-
a substantially rectangular coil; means mounting said coil for rotational motion about an axis perpendicular to one pair of sides of the coil and passing through the interior of the coil, said axis dividing said coil into a first portion and a second portion; a first magnetic structure surrounding the first portion of the coil, said magnetic structure defining first, second, and third magnetic flux filled air gaps wherein first and third opposing coil segments, perpendicular to the axis of rotation and surrounded by the first magnetic structure, are located in the first and third air gaps, respectively, said air gaps having therein oppositely-directed magnetic fields substantially perpendicular to their respective coil segments, and a first full side of the coil, lying between the first and third coil segments, is located in the second air gap, said air gap having therein a magnetic field which is substantially perpendicular to the first full side of the coil and orthogonal to the fields in the first and third air gaps, said magnetic field in said second air gap further having a direction such that the force exerted on the first full side of the coil is in the same direction as the forces exerted on the first and third coil segments by the fields in the first and third air gaps; and indicator means responsive to coil movement. - View Dependent Claims (11, 12)
-
Specification