Proximity switch insensitive to interference fields

Details Proximity switch insensitive to interference fields Proximity switch insensitive to interference fields

1985-10-15

1987-06-16

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Switching systems

Condition responsive

361179, H01H 3600

Patent

active

046738274

ABSTRACT:
A proximity switch comprises two magnetic field sensors for detecting an roach of a machine having a magnet. The two sensors are arranged in such a way that one of the sensors is at a smaller distance from the machine than the other sensor when the machine is in a detectable distance so that each of the two sensors responds to the approach of the magnetic field of the machine and outputs a detected signal based on the electrical output characteristics of the sensor. The detected signals from both sensors are fed to a differential circuit for generating a differential signal. In order to compensate interference field, the differential signal due to the magnetic field of the machine is set greater than the differential signal generated from the interference field. A circuit for converting the differential signal into an output signal is provided for the proximity switch.

REFERENCES:
patent: 3953770 (1976-04-01), Hayashi
patent: 4161659 (1979-07-01), Jacob
patent: 4271763 (1981-06-01), Berger
patent: 4349814 (1982-09-01), Akehurst
patent: 4414541 (1983-11-01), Ho
patent: 4513257 (1985-04-01), Miyamoto et al.

Affiliated with

Also associated with

Rating

Proximity switch insensitive to interference fields does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Proximity switch insensitive to interference fields, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Proximity switch insensitive to interference fields will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-685336