Wireless inductive coupled switch

Details Wireless inductive coupled switch Wireless inductive coupled switch

2000-03-02

2001-08-14

Easthom, Karl D. (Department: 2832)

Electricity: circuit makers and breakers

Special application

C361S179000

Reexamination Certificate

active

06274829

ABSTRACT:

FIELD OF THE INVENTION
This invention relates generally to industrial application switches and, more particularly, to a wireless inductive coupled switch for detection of switch closure across an air gap.
BACKGROUND OF THE INVENTION
Often, a machine will have multiple moving parts on which it is desired to detect switch closure. Currently, wires are moved around and between the moving parts to detect proper line up of switches, such as proximity switches, across some distance between components. As portions of equipment are moved from one position to another, proper positioning is detectable using the wired detection means. However, arranging and moving the wires for detection around the moving equipment can result in breakage of the wires.
Although the existing art proposes some wireless methods for detecting a switch closure across an air gap, these existing methods are quite complex. For example, using radio signals requires a small radio transmitter and receiver. Transmitting signals or data across the air gap then requires additional electronics in both the transmitter and receiver.
It would be desirable, then, to have a less complex method for detecting switch closure across an air gap.
SUMMARY OF THE INVENTION
This need is met by the present invention wherein a wireless inductive coupled switch is provided for detection of switch closure across an air gap.
In accordance with one embodiment of the present invention, a device is provided for detecting switch closure across an air gap. The device comprises a wireless inductive coupled switch for use with a proximity sensor to transmit a switch closure across an air gap.
Objects and advantages of the invention will be apparent from the following description, the accompanying drawings and the appended claims, to which reference may be had for a full understanding of the nature of the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS
In the Drawings:
FIG. 1
illustrates a device for detecting a switch closure across an air gap;
FIG. 2
is a wireless inductive coupled switch portion of the device of
FIG. 1
; and
FIG. 3
illustrates the electrical relationship between the portions of the device of
FIG. 1
, for detecting switch closure.


REFERENCES:
patent: 4071714 (1978-01-01), Satoh
patent: 4322701 (1982-03-01), Drapeau
patent: 4980526 (1990-12-01), Reneau
patent: 5416293 (1995-05-01), Reneau
patent: 5578977 (1996-11-01), Jansseune
patent: 5731666 (1998-03-01), Folker et al.
patent: 5831802 (1998-11-01), Ahmed et al.
patent: 6130489 (2000-10-01), Heimlicher

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