Detection of ophthalmic surgical handpiece by injecting current

Electricity: electrical systems and devices – Control circuits for electromagnetic devices – For relays or solenoids

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361180, H01H 4712

Patent

active

059911425

ABSTRACT:
An apparatus to detect the presence of a surgical handpiece is provided. The handpiece is electrically isolated from its source of electric power by a transformer having two primary windings and one secondary winding. The first winding provides power to the handpiece and the second winding is used in the handpiece detection apparatus. The handpiece detection apparatus includes a detection circuit and a comparator that compares the electrical signal input to a standard to determine the presence of the handpiece.

REFERENCES:
patent: 4757213 (1988-07-01), Tigges et al.
patent: 4771359 (1988-09-01), Link
patent: 4820938 (1989-04-01), Mix et al.
patent: 5636288 (1997-06-01), Bonneville et al.
patent: 5798913 (1998-08-01), Tiesinga et al.

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