Abstract: A conveyor belt scraper tensioner consisting of a blade mounted on a rotatable axle and rotatably biased into the conveyor belt by means of a folded elastomeric biasing medium affixed at one end to a fixed flange and affixed at the other end to a rotatable flange mounted on said scraper blade axle. Typically one tensioning device would be used on each scraper blade axle, although dual devices mounted at each end of the scraper blade axle may be employed when desired. Additionally, the scraper blade tensioner may be fitted with a movement limiting chain to prevent the scraper blade from being drawn into and gouging the conveyor belt as the blade wears or when encountering material tightly adhered to the conveyor belt surface. A slab of gum rubber is the preferred elastomeric biasing material, however other suitable elastomeric materials may be employed.

Abstract: A remotely controlled tool for marking the location of defective tubes in a heat exchanger tube sheet, comprising an axially extensible pilot which is extended into and retracted from the defective tube to be marked by means of an internally threaded captive nut, which is attached to the pilot and is in threaded engagement with an externally threaded drive screw. The drive screw is driven by a reversible drive motor. Marking of a tube is accomplished by means of a paint-saturated annular felt marking pad carried in a cylindrical sleeve which surrounds and is axially slideable with respect to the pilot. The marking pad is driven outwardly along the pilot to engage the tube sheet surrounding the defective tube and is retracted after the marking function has been performed by means of a solenoid.

Abstract: A remotely controlled tool for marking the location of defective tubes in a heat exchanger tube sheet, comprising an axially extensible pilot which is extended into and retracted from the defective tube to be marked by means of an internally threaded captive nut, which is attached to the pilot and is in threaded engagement with an externally threaded drive screw. The drive screw is driven by a reversible drive motor. Marking of a tube is accomplished by means of a paint-saturated annular felt marking pad carried in a cylindrical sleeve which surrounds and is axially slideable with respect to the pilot. The marking pad is driven outwardly along the pilot to engage the tube sheet surrounding the defective tube and is retracted after the marking function has been performed by means of a solenoid.