Current sensor switch

• US 6,222,283 B1
• Filed: 06/17/1999
• Issued: 04/24/2001
• Est. Priority Date: 03/17/1998
• Status: Expired due to Fees

• Current Assignee: Stryker Corporation
• Original Assignee: American Immuno Tech, LLC
• Inventors: Regla, Peter
• Primary Examiner(s): FLEMING, FRITZ M
• Application Number:
  US09/326,994
• Time in Patent Office: 677 Days
• Field of Search: 307/116, 307/117, 307/125, 307/129, 307/130, 307/131
• US Class Current: 307/117
• CPC Class Codes: A61B 18/00 Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body eye surgery A61F9/007; ear surgery A61F11/00
• CPC Class Codes: A61B 2218/008 for smoke evacuation
• CPC Class Codes: A61L 11/00 Methods specially adapted for refuse disintegrating medical waste B02C19/0075; disposal of medical waste B09B3/00
• CPC Class Codes: B01D 53/005 by heat treatment

Abstract

An IR current sensor circuit which is operative to detect an existing current level in a conductor and to produce output signals representative of the existing current level wherein changes of the current level in the conductor can produce changes in the output signals and effect a control function in response thereto.

Claims

1. A current sensor circuit comprising,

coil means adapted to be disposed adjacent to a current carrying conductor to sense the current level in said conductor and to produce signals representative of said current level,

comparator means having a plurality of inputs and an output,

an amplifier connected between said coil means and a first input of said comparator means,

a reference amplifier connected between the output of said amplifier and a second input of said comparator means,

said comparator means operative to receive input signals from said amplifier and said reference amplifier and to produce output signals at the output thereof which output signals represent the current level which is passed through said current carrying conductor,

frequency generator means connected to the output of said comparator means and operative to produce a frequency signal representative of said current level,

infra red source means connected to said frequency generator means and operative to produce infra red signals representative of the frequency signal produced by said frequency generator means, and

infra red receiver means spaced apart from said infra red source means and adapted to receive the infra red signals produced by said infra red source means and to produce an output signal representative of the current level in said current carrying conductor.

2. The circuit recited in claim 1 including,

a computer connected to receive an output signal from said infra-red receiver means and to produce an output signal representative of the current level in said current carrying conductor.

3. The circuit recited in claim 2 including,

a discriminator circuit connected to receive the output signal from said infra red receiver means and to supply signals to said computer.

4. The circuit recited in claim 2 including,

a utility device connected to said computer and adapted to be rendered operative in response to the output signal produced by said computer.

5. The circuit recited in claim 4 including,

a manual input controller connected to said computer in order to manually control the output signal produced by said computer.

6. The circuit recited in claim 1 including,

a power source connected to the components of said circuit to provide operating power thereto.

7. The circuit recited in claim 6 including,

an ambient light sensor connected to said power source to selectively disable said power source and render said circuit inoperative when a prescribed ambient light condition exists.

8. A current sensor circuit comprising,

a coil adapted to be disposed adjacent to a current carrying conductor and to produce output signals representative of the current magnitude in said current carrying conductor,

a first amplifier connected to receive output signals front said coil,

a second amplifier connected to receive output signals from said first amplifier,

a comparator connected to both of said first and second amplifiers to receive signals therefrom and to produce output signals which represent the magnitude of the current which exists in said current carrying conductor,

a frequency generator connected to receive the output signals from said comparator and operative to produce a frequency signal representative of the magnitude of said current in said current carrying conductor,

an infra-red source connected to said frequency generator means and operative to produce infra-red signals representative of the frequency signal produced by said frequency generator, and

an infra-red receiver unconnected to said infra-red source and operative to receive via open space, the infra-red signals produced by said infra-red source means and to produce an output signal representative of the magnitude of said current in said conductor.