Surgery – Truss – Pad
Patent
1983-02-08
1986-06-17
Howell, Kyle L.
Surgery
Truss
Pad
433 69, 307101, 324251, A61B 510
Patent
active
045950229
ABSTRACT:
In an exemplary embodiment, one or more flux pickups with ferromagnetic properties, preferably Hall generators provided with antennas, are provided for the detection of a field flux or of a change of field flux proceeding from a field generator. Magnetization pulses (I.sub.2) are provided in periodic sequence to the flux pickups (I through VIII), the pulse height and width (t.sub.im) being selected in such manner that the saturation field strength (M.sub.s) of the flux pickups is therewith achieved, so as to produce a maximum residual magnetization (M.sub.R). The flux pickups (I through VIII) are preferably driven by means of pulse-shaped signals (I.sub.1), with the magnetization pulses being supplied in the pulse interval (i.sub.s) of these signals synchronous to the pulse repetition rate. The method is particularly employed in gnathography for recording the lower jaw movement of a human being.
REFERENCES:
patent: 3482163 (1969-12-01), Peek et al.
patent: 3772617 (1973-11-01), Ciesielka
patent: 4059798 (1977-11-01), Dierker et al.
patent: 4303077 (1981-12-01), Lewin et al.
patent: 4371836 (1983-02-01), Nickel et al.
Hanley John C.
Howell Kyle L.
Siemens Aktiengesellschaft
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