Importance

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Abstract

A material sensing switch comprising a body having an open first end and a second end closed by a wall member. A flange extends outwardly from the body at the first end thereof for securing the body to a supporting structure. A backing plate removably closes the first end to define an interior body compartment between the backing plate and the inner surface of the wall member. A fiber optic switch is positioned within the body compartment and has a plunger extending therefrom so that the outer end thereof is positioned outwardly of the outer surface of the wall member. A pressure plate is removably mounted on the second end of the body at the outer surface of the wall member and is adapted to engage the switch plunger to actuate the fiber optic switch upon movement of the pressure plate relative to the plunger. A flexible member is removably secured to the body at the second end thereof and covers the pressure plate. A ring member secures the flexible member to the body. An adjustment spring is provided for yieldably resisting the movement of the pressure plate towards the switch plunger. The backing plate, body, flexible member and ring are comprised of a non-corrosive material.

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First Claim