Patent ID: 11906504
Assignee: PRATT & WHITNEY CANADA CORP.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An electromagnetic chip detector for detecting a metallic chip in lubricating fluid of an engine, the electromagnetic chip detector comprising:
a first electrically conductive terminal;
a second electrically conductive terminal spaced apart from the first electrically conductive terminal to define a chip-receiving gap therebetween;
a magnetizing circuit including:
a first coil inductively coupled to the first electrically conductive terminal to generate a first generated magnetic field of a first polarity; and
a second coil inductively coupled to the second electrically conductive terminal to generate a second generated magnetic field of a second polarity opposite the first polarity, the first coil and the second coil being electrically connected in series between a first node and a second node;

a chip detection circuit in parallel with the magnetizing circuit, the chip detection circuit including:
the first electrically conductive terminal electrically connected to the first node;
the second electrically conductive terminal electrically connected to the second node; and
the chip-receiving gap defined between the first electrically conductive terminal and the second electrically conductive terminal.