OXOPYRROLIDINE COMPOUNDS, PREPARATION OF SAID COMPOUNDS AND THEIR USE IN THE MANUFACTURING OF LEVETIRACETAM AND ANALOGUES

摘要

The detector utilises the microstructure and effects integration of an electric field over the volume of a ferrite core. The detector, in one form, includes upper ferrite pole half (1), lower ferrite pole half (7), circuit board (4), insulating washer (5) and spring conductor (2). Assembled, betwee n the ferrite halves (1 and 7) is the spring conductor (2) compressed against the upper ferrite (1) and the circuit board (4) with the washer (5) between the circuit board (4) and the lower ferrite (7). There are two conducting plates (3), either side of the circuit board (4), a first insulated from the lower ferrite (7) by the washer (5) and the second in electrical contact wit h the upper ferrite (1) via spring conductor (2). A voltage produced across th e plates (4) is related to the detected electric field.