Printed circuit synchiro

Claim 1

IN COMBINATION: A THIN SUBSTRATE OF ELECTRICALLY INSULATING MATERIAL HAVING ROWS OF APERTURES SPACED FROM AND ALIGNED WITH A REFERENCE LINE AND EXTENDING THROUGH SAID SUBSTRATE; A FIRST PATTERN OF INDEPENDENT ELECTRICAL CONDUCTORS ON ONE SURFACE OF SAID SUBSTRATE, EACH OF SAID CONDUCTORS ON ONE SURFACE OF SAID SUBSTRATE, EACH OF SAID CONDUCTORS EXTENDING GENERALLY TRANSVERSELY OF THE REFERENCE LINE FROM A FIRST APERTURE TO A SECOND APERTURE DISPLACED IN THE DIRECTION OF THE REFERENCE LINE FROM THE FIRST APERTURE; A SECOND PATTERN OF INDEPENDENT ELECTRICAL CONDUCTORS ON THE OTHER SURFACE OF SAID SUBSTRATE, EACH OF SAID CONDUCTORS EXTENDING GENERALLY TRANSVERSELY OF THE REFERENCE LINE FROM A FIRST APERTURE TO A SECOND APERTURE DISPLACED IN THE DIRECTION OF THE REFERENCE LINE FROM THE FIRST APERTURE; ELECTRICALLY CONDUCTING MEANS EXTENDING THROUGH SAID APERTURES INDIVIDUALLY AND MAKING CONNECTIONS BETWEEN THE RESPECTIVE CONDUCTORS OF SAID PATTERNS WHICH TERMINATE AT THE SEVERAL APERTURES TO COMPLETE A SINGLE CURRENT PATH WHICH TRANSVERSES CYCLICALLY BACK AND FORTH, BOTH ALONG AND ACROSS THE REFERENCE LINE, THE NUMBER OF TRANSVERSES OF SAID PATH IN THE DIRECTION OF THE REFERENCE LINE BEING LESS THAN THE NUMBER OF CROSSINGS OF SAID PATH ACROSS THE REFERENCE LINE AND NO TWO SUCCESSIVE CROSSINGS OF THE REFERENCE LINE BY THE PATH OCCURRING ON ADJOINING CONDUCTORS, SO THAT WHEN ADJOINING CROSSINGS ARE CONSIDERED IN ORDER, BEGINNING AT ONE END OF THE REFERENCE LINE, GROUPS OF CROSSINGS ALL IN ONE DIRECTION ALTERNATE WITH GROUPS OF CROSSINGS ALL IN THE OTHER DIRECTION TO DEFINE THEREBETWEEN, WHEN ELECTRIC CURRENT FLOWS ALONG SAID PATH, A PLURALITY OF SERIALLY CONTIGUOUS MAGNETIC POLE AREAS OF SUCCESSIVELY OPPOSITE POLARITIES, THE NUMBER OF POLE AREAS BEING AN ORER OF MAGNITUDE LESS THAN THE NUMBER OF SAID CROSSING; AND MEANS MAKING ELECTRICAL CONNECTIONS TO THE ENDS OF SAID PATH.