Variable inductance transducer

Abstract

Abstract 1484845 Measuring pressure CHRYSLER CORP 17 March 1976 [17 March 1975] 10745/76 Heading G1N [Also in Division H1] A variable inductance transducer comprises a plastics bobbin with end flanges 38, 40 between which a winding 24 is disposed, a plastics enclosure 32 moulded around the winding, terminals 26, 28, disposed in sockets 42, 44 at one end of the bobbin, and a displaceable ferrite core 30 in a bore 36. As shown the lower end of the bobbin extends to form the upper half of a chamber separated by a diaphragm 58 into two ports 70, 72, to constitute a vacuum-measuring arrangement. If the chamber 72 is connected to a source of vacuum, e.g. the inlet manifold of an I.C. engine, the diaphragm 58 is drawn downwards against the action of a spring 60. The diaphragm carries a pin 68 which is connected to the ferrite core by means of a flexible spring 62 which allows for tilting in the diaphragm movement. In a different arrangement, Fig. 3 (not shown) the bobbin extends downwards as an externally threaded tube which can be screwed into a mounting member. A flexible wire rod extends from the magnetic core through the tube and is connected to the member whose displacement is to be measured.

Inventors

No inventors recorded.

Bibliographic Details