Sheet detector

Claim 1

IN A SHEET DETECTING MECHANISM, A SHEET SUPPORT, MEANS FOR TRANSPORTING SHEETS IN LAPPED STREAM FASHION ALONG SAID SUPPORT TO PROVIDE SAI STREAM WITH ALTERNATE THICK LAP AND THINNER STREAM SECTIONS IN THE DIRECTION OF TRAVEL OF SAID SHEETS, MEANS SENSING THE THICKNESS OF SAID STREAM IN SAID THINNER STREAM SECTIONS, MEANS FOR PERFORMING A CONTROL FUNCTION UPON DETECTION OF AN EXCESS THICKNESS OF SHEETS PRESENTED TO SAID SENSING MEANS, SWITCH OPERATING MEANS TIMED WITH THE TRAVEL OF SHEETS ALONG SAID SUPPORT, A FIRST SWITCH INDEPENDENT OF SAID SWITCH OPERATING MEANS, SAID FIRST SWITCH BEING ADAPTED TO BE CLOSED BY SAID SENSING MEANS UPON DETECTION OF AN EXCESS SHEET THICKNESS IN A STREAM SECTION OF SAID STREAM, AND A SECOND SWITCH OPERATED BY SAID SWITCH OPERATING MEANS TO OPEN EACH TIME SAID SENSING MEANS IS NORMALLY SENSING A LAP SECTION AND TO CLOSE EACH TIME SAID SENSING MEANS IS NORMALLY SENSING A STREAM SECTION, SAID SWITCHES BEING IN SERIES CIRCUIT WITH SAID CONTROL MEANS, WHEREBY SAID FIRST SWITCH CAN FUNCTION TO OPERATE SAID CONTROL MEANS ONLY DURING THAT PORTION OF A CYCLE WHEN THE SENSING MEANS IS SENSING A SECTION WHICH IS NORMALLY A STREAM SECTION.