Title:
ELECTRIC CURRENT DETECTING ELEMENT
Document Type and Number:
Japanese Patent JP3426311
Kind Code:
B2
Abstract:
PURPOSE: To make it possible to calculate an electric current reaching a load actually by subtracting the electric current flowing into a standard conductor from a main conductor by a subtracter.
CONSTITUTION: For example, using an electric current transformer 24, the electric current flowing in the standard conductor 22 is magnetically subtracted, from the current flowing in the main conductor 14. The main conductor 14 is wound in the predetermined direction in the transformer 24, and the standard conductor 22 is wound in the reversed direction in the same transformer 24. Output of power from the current transformer 24 becomes the difference of the current flowing between the main conductor 14 and standard conductor 22, i.e., the current reaching a load 12a (an incision instrument). The current detected by electric current sensor 20 and use for controlling a cut-off circuit 18 is this electric current. By means of this constitution, it can calculate the electric current reaching the actual load 12a.
Inventors:
Richard K. Thompson
Ernest G. Sevilla
Ernest G. Sevilla
Application Number:
JP33469893A
Publication Date:
July 14, 2003
Filing Date:
December 28, 1993
Export Citation:
Assignee:
Commed Corporation
International Classes:
A61B18/12; A61B18/14; A61B17/34; G01R15/14; A61B19/00; (IPC1-7): A61B18/12; A61B17/34; G01R15/14
Domestic Patent References:
| JP2116362A | ||||
| JP58221938A | ||||
| JP380846A | ||||
| JP5275882A |
Attorney, Agent or Firm:
Shoichi Ui (4 others)
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