Magnetic field shim coil structure utilizing laminated printed circuit sheets

Claim 2

Electrical circuit apparatus comprising a plurality of separate electrical circuits mounted on a plurality of insulating sheets, certain ones of said electrical circuits being mounted on one side of a different one of said insulating sheets, the insulating sheets being stacked one on top of the other, the sheets being stacked such that the electrical circuits on the one side of one sheet are positioned under the other side of the next sheet in the stack, the electrical terminals of each of the circuits on each of the sheets being brought out to at least one terminal edge of said sheet, the terminal edges of the plurality of sheets in the stack being in alignment, the terminals of each of the sheets being located at a position along the terminal edge different than the terminal positions of the other sheets in the stack, each sheet in the stack having a recess in its terminal edge to expose the terminals on the terminal edges of each of the sheets below said sheet in the stack.

Claim 3

An electrical apparatus as claimed in claim 1 wherein said electrical circuits comprise printed conductors on said insulating sheets.

Claim 4

An electrical structure as claimed in claim 2 wherein electrical connections are made between separate circuits on a sheet by conductive jumpers affixed to internal terminals of said circuits and insulated from other conductors on the sheet.

Claim 5

An electrical apparatus as claimed in claim 1 wherein a thin film of adhesive between sheets serves to secure the sheets in said stacks.

Claim 6

An electrical apparatus as claimed in claim 1 wherein one of said sheets has a recess in its terminal edge which is aligned with and exposes the terminals on the sheet below, the terminals on said one sheet being positioned adjacent said recess, and wherein an upper sheet above said one sheet has a recess in its terminal edge which is aligned with and exposes the terminals of both said one sheet and the sheet below said one sheet, the terminals on said upper sheet being positioned adjacent the recess in said upper sheet.

Claim 7

An electrical apparatus as claimed in claim 1 wherein said electrical circuits are printed conductors on said insulating sheets.

Claim 8

An electrical apparatus as claimed in claim 1 wherein said electrical circuits are electrical coils.

Claim 9

An electrical apparatus as claimed in claim 7 wherein said coils are printed conductors on said insulating sheets.

Claim 10

Electrical apparatus comprising a pair of spaced-apart electrical structures, each structure including a plurality of separate electrical circuits, each circuit of one set having an associated circuit in the other set, tHe associated circuits in the two sets being electrically coupled together, a plurality of insulating sheets, certain ones of said electrical circuits in a set being mounted on one side of a different one of said insulating sheets, the insulating sheets in each set being stacked one on top of the other, the two stacks of sheets being stacked such that the electrical circuits on the one side of one sheet are positioned under the other side of the next sheet in the stack, the electrical terminals of each of the circuits on each of the sheets being brought out to one edge of said sheet, the terminal edges of the plurality of sheets in a stack being in alignment, the terminals of each of the sheets in a set being located at a position along the terminal edge different than the terminal positions of the other sheets in the set, each sheet in the stack having a recess in its terminal edge to expose the terminals on the terminal edges of each of the sheets below said sheet in the stack.

Claim 11

Electrical apparatus comprising a pair of spaced-apart electrical structures, each structure including a plurality of separate electrical circuits, each circuit of one set having an associated circuit in the other set, tHe associated circuits in the two sets being electrically coupled together, a plurality of insulating sheets, certain ones of said electrical circuits in a set being mounted on one side of a different one of said insulating sheets, the insulating sheets in each set being stacked one on top of the other, the two stacks of sheets being stacked such that the electrical circuits on the one side of one sheet are positioned under the other side of the next sheet in the stack, the electrical terminals of each of the circuits on each of the sheets being brought out to one edge of said sheet, the terminal edges of the plurality of sheets in a stack being in alignment, the terminals of each of the sheets in a set being located at a position along the terminal edge different than the terminal positions of the other sheets in the set, each sheet in the stack having a recess in its terminal edge to expose the terminals on the terminal edges of each of the sheets below said sheet in the stack.

Claim 12

An electrical apparatus as claimed in claim 1 wherein said electrical circuits are printed conductors on said insulating sheets.

Claim 13

An electrical apparatus as claimed in claim 10 wherein series connections are made between separate circuits on a sheet by conductive jumpers affixed to internal terminals of said circuits and insulated from other conductors on the sheet.

Claim 14

An electrical apparatus as claimed in claim 9 wherein the two sets of stacked sheets are mounted together in spaced-apart parallelism at their terminal edges.

Claim 15

An electrical apparatus as claimed in claim 9 wherein a thin film of adhesive between sheets serves to secure the sheets in said stacks.

Claim 16

An electrical apparatus as claimed in claim 9 wherein one of said sheets has a recess in its terminal edge which is aligned with and exposes the terminals on the sheet below, the terminals on said one sheet being positioned adjacent said recess, and wherein an upper sheet above said one sheet has a recess in its terminal edge which is aligned with and exposes the terminals of both said one sheet and the sheet below said one sheet, the terminals on said upper sheet being positioned adjacent the recess in said upper sheet.

Claim 17

An electrical coil apparatus as claimed in claim 14 wherein said electrical circuits are printed conductors on said insulating sheets.

Claim 18

An electrical apparatus as claimed in claim 15 wherein series connections are made between separate circuits on a sheet by conductive jumpers affixed to internal terminals of said circuits and insulated from other conductors on the sheet.

Claim 19

An electrical apparatus as claimed in claim 14 wherein the two sets of stacked sheets are mounted together in spaced-apart parallelism at their terminal edges.

Claim 20

An electrical apparatus as claimed in claim 14 wherein a thin film of adhesive between sheets serves to secure the sheets in said stacks.

Claim 21

An electrical apparatus as claimed in claim 9 wherein said electrical circuits are electrical coils.

Claim 22

An electrical apparatus as claimed in claim 19 wherein said electrical coils are printed conductors on said insulating sheets.