Two-wire proximity detector

Details Two-wire proximity detector Two-wire proximity detector

1977-12-02

1979-09-18

Miller, Jr., Stanley D.

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307252R, 328 5, 361179, H01H 3600, H03K 1700

Patent

active

041684435

ABSTRACT:
In a two-wire proximity detector, a supply to a probe and auxiliary apparatus is obtained from a bridge rectifier through two regulating circuits of which the first operates when an inhibitor transistor is conducting, while the second operates when the inhibitor transistor is blocked. The first regulating circuit is of the ballast type. The second regulator circuit is of the type which produces a delay in the triggering of a switch thyristor (9). The detector can be fed with an alternating voltage variable over a wide range.

REFERENCES:
patent: 3743865 (1973-07-01), Riechmann
patent: 3747010 (1977-07-01), Buck

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