Slide attenuator

Claim 1

A SLIDE ATTENUATOR COMPRISING TWO RECTANGULAR PRINTED CIRCUIT BOARDS MOUNTED IN SPACED PARALLEL RELATIONSHIP, EACH OF SAID PRINTED CIRCUIT BOARDS HAVING ON ITS OUTER SIDE A SERIES OF TRANSVERSE ELONGATE CONTACT BARS MOUNTED SIDE-BY-SIDE WITH TERMINAL PORTIONS IN A ROW LENGTHWISE OF THE BOARD AND WITH RESISTOR-WIRE HOLES IN ROWS ALSO LENGTHWISE OF THE PRINTED BOARD OF WHICH A FIRST ROW OF HOLES IN INTERMEDIATE OF THE LENGTHS OF THE CONTACT BARS AT THE INNER ENDS OF SAID TERMINAL PORTIONS AND A SECOND ROW OF HOLES IS AT THE FAR ENDS OF THE CONTACT BARS OPPOSITE SAID TERMINAL PORTIONS, EACH OF SAID PRINTED CIRCUIT BOARDS HAVING ALSO A SLIP BAR LENGTHWISE OF THE BOARD AND ADJACENT SAID ROW OF TERMINAL PORTIONS, SERIES ELECTRICAL RESISTORS CONNECTED BETWEEN SUCCESSIVE CONTACT BARS WITH ONE TERMINAL WIRE OF EACH RESISTOR ENGAGING AN INTERMEDIATE HOLE IN A RESPECTIVE CONTACT BAR AND THE OTHER TERMINAL WIRE OF THE RESISTOR ENGAGING A FAR END HOLE OF A NEXT ADJACENT CONTACT BAR, A SUPPORTING RECTANGULAR FRAME FOR SAID PRINTED CIRCUIT BOARDS SURROUNDING SAID BOARDS EDGEWISE THEREOF, A ROD BETWEEN SAID PRINTED CIRCUIT BOARDS SUPPORTED AT ITS END BY THE END WALLS OF SAID FRAME, A SLIDE MOUNTED ON SAID ROD HAVING SIDE PORTIONS EXTENDING BEYOND THE OUTER SIDES OF SAID PRINTED CIRCUIT BOARDS, A TOP WALL OF SAID FRAME HAVING A SLOT OF A WIDTH LESS THAN THE WIDTH OF THE SPACE BETWEEN SAID PRINTED CIRCUIT BOARDS AND OF A LENGTH EQUAL APPROXIMATELY TO THE LENGTH OF SAID SLIP BAR, A HANDLE ON SAID SLIDE EXTENDING OUTWARDLY THROUGH SAID SLOT, AND A BRIDGING CONTACT MOUNTED INSULATEDLY ON EACH SIDE PORTION OF SAID SLIDE BEYOND THE EDGE OF SAID SLOT FOR CONNECTING THE RESPECTIVE SLIP BAR TO SAID TERMINAL PORTIONS SELECTIVELY AS SAID SLIDE IS MOVED MANUALLY ALONG THE PRINTED BOARDS.