초록 ▼

Photoelectric reflective object sensors are mounted in an exteriorly mounted auxiliary switch case to detect a member on a movable contact assembly of the contactor to produce logic level output signals indicative of the operational state of the contactor electromagnet. One or a pair of photoelectri

Photoelectric reflective object sensors are mounted in an exteriorly mounted auxiliary switch case to detect a member on a movable contact assembly of the contactor to produce logic level output signals indicative of the operational state of the contactor electromagnet. One or a pair of photoelectric sensors are used in a side mounted auxiliary switch to detect the contactor movable contact assembly in the energized or de-energized position, or en route between the two positions. A single photoelectric sensor is used in a top adder auxiliary switch to detect if the movable contact assembly is or is not in the extended (de-energized) position. The auxiliary switches provided logic level output signals directly usable with microprocessor based controllers.

대표청구항 ▼

[ We claim:] [9.] An auxiliary switch for an electromagnetic contactor wherein said contactor comprises:a housing having a side wall and a window in said side wall;an electromagnet in said housing, said electromagnet comprising a fixed core and a movable armature;a target disposed internally of said

[ We claim:] [9.] An auxiliary switch for an electromagnetic contactor wherein said contactor comprises:a housing having a side wall and a window in said side wall;an electromagnet in said housing, said electromagnet comprising a fixed core and a movable armature;a target disposed internally of said housing, said target being operably connected to said armature and positioned in said window; andmeans biasing said armature to a first position spaced from said core whereat said target is at a first position in said window, operation of said electromagnet effecting movement of said armature to a second position whereat said target is at a second position in said window; andsaid auxiliary switch comprises:a case attached to said side wall over said window; andphotoelectric sensor means mounted to said case, said sensor emitting a light beam toward said window and receiving said light beam reflected from said target, said sensor generating an electrical output signal in response to a predetermined one of presence of said reflected light beam or absence of said reflected light beam for indicating a position of said armature.