Electrical transmission or interconnection systems – Switching systems – Condition responsive
Patent
1991-10-04
1993-11-23
Pellinen, A. D.
Electrical transmission or interconnection systems
Switching systems
Condition responsive
307309, 324236, 32420716, 331 65, H01H 3600, G01N 2772, G01R 3312
Patent
active
052647331
ABSTRACT:
An inductive proximity switch contains an oscillator that generates an alternating magnetic field and which, when a trigger penetrates the alternating field, changes its oscillating state. An evaluation circuit uses the change in state to generate a switching signal to control a load switch. To achieve a proximity switch response distance that is as large as possible regardless of the trigger material and the ambient temperature, two sensing coils are located in the alternating field to detect the difference between voltages induced in them. The sensing coils are designed so that the alternating voltage differential becomes zero at a desired response distance. When the alternating voltage differential is zero at an input of oscillator amplifier, the oscillator abruptly changes its oscillating state. The change in oscillation state is detected by the evaluation circuit and converted into a binary switching signal for the load switch.
REFERENCES:
patent: 3805185 (1974-04-01), Kishi
patent: 4091833 (1978-05-01), Ellis et al.
patent: 4350954 (1982-09-01), Seilly
patent: 4513257 (1985-04-01), Miyamoto et al.
patent: 4587486 (1986-05-01), Soyck
patent: 4677384 (1987-06-01), Payne
patent: 4719362 (1988-01-01), Nest et al.
patent: 4757213 (1988-07-01), Tigges et al.
patent: 4879531 (1989-11-01), Tigges et al.
patent: 5012206 (1991-04-01), Tigges
Mutron Katalog '73H Nettopreise Ohne Mehrwertsteuer, Distribution und Fachgrosshandel, Muller & Co. KgIhr Lieferant fur aktive, passive und elektromechanisch Elektronik-Bauteile und Zubehor, p. 690, no English translation.
Gekoppelt Vereinfachte Signal aufbereitung fur Langenmessungen, John Sylvan/Otto Panvitius, Elektronik Prazis-Nr. 11-Jun. 7, 1990, pp. 68-70 and 75, no English translation.
"Transducers, Theory & Applications", Allocca, et al., Reston Publishing Company, 1984, pp. 69-88.
Elms Richard T.
Pellinen A. D.
Werner Turck GmbH & Co. KG
LandOfFree
Inductive proximity switch does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Inductive proximity switch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Inductive proximity switch will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1851694