Contactless stimulus transducer
OwnerJoachim Adolf Maassinventor
Life of this patent
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Abstract
A contactless stimulus transducer which induces a stimulus current into a living system by means of a changing magnetic field which is produced by an electric field winding on a ferro-magnetic core which consists of two similarly or nearly similarly shaped pole pieces whose lateral boundary surfaces have equidirectional curvatures and whose concave sides face each other.
Claims8
Apparatus for stimulating a biological specimen, comprising at least two ferro-magnetic pole pieces, means for positioning said pole pieces in operative relation to said biological specimen, each of said pole pieces having an outer boundary surface of predetermined curvature and an inner curved surface intersecting the outer surface at opposite ends of the pole piece, said inner curved surfaces of the pole pieces confronting each other in at least partially encircling relation to the biological specimen to define a stimulus zone, a field winding mounted on each of said pole pieces intermediate the opposite ends thereof, a source of energizing current, and means connecting said source to the field windings for generating opposing magnetic fields extending from the inner surfaces of the pole pieces into the stimulus zone.
Dependencies are inferred from the claim text.