초록 ▼

A proximity switch for signaling the location of a movable member at either of opposite end limits of movement relative to a stationary frame includes a movable member, such as a piston, traveling along a fixed path of movement between a first position and a second position and having an aperture fo

A proximity switch for signaling the location of a movable member at either of opposite end limits of movement relative to a stationary frame includes a movable member, such as a piston, traveling along a fixed path of movement between a first position and a second position and having an aperture formed within the movable member extending from one end toward another end. A housing encloses a portion of the movable member to form a first fluid chamber between the movable member and a first end of the housing, and to form a second fluid chamber between a second end of the housing and the movable member. Expansion of the first fluid chamber drives the movable member to the first position and expansion of the second fluid chamber drives the movable member to the second position. A sensor-supporting member is connected at one end to the housing with another end extending parallel to the path of travel of the movable member toward the second end of the housing engaged within a non-electrically conductive sleeve fixedly disposed in the aperture of the movable member. Sensor switches are mounted on a non-electrically conductive portion of the sensor-supporting member for sensing the first and second positions of the movable member. The sensor switches are activated by annular electrically conductive contacts disposed on an inner surface of the insulated sleeve disposed within the aperture of the movable member.

대표청구항 ▼

A proximity switch comprising: a movable member traveling along a fixed path between a first position and a second position, said movable member having an aperture extending parallel to the fixed path from one end of the movable member toward another end of the movable member; a housing enclosing a

A proximity switch comprising: a movable member traveling along a fixed path between a first position and a second position, said movable member having an aperture extending parallel to the fixed path from one end of the movable member toward another end of the movable member; a housing enclosing a portion of the movable member to form a first expansible fluid chamber between a first end of the housing and the movable member, and forming a separate second expansible fluid chamber between a second end of the housing and the movable member, wherein expansion of the first fluid chamber drives the movable member to the first position and expansion of the second fluid chamber drives the movable member to the second position; a sensor-supporting member connected to one end of the housing and extending parallel to the fixed path toward another end of the housing, said sensor-supporting member having a non-electrically conductive portion engaged within the aperture of the movable member; separate fixed sensor means mounted on the non-electrically conductive portion of the sensor-supporting member said respective sensor means being electrically insulated from each other within said aperture; and electrically conductive contact means within the aperture of the movable member and movable therewith to bridge the respective sensor means when in the first position.