Abstract: A rapper for use in vibrating parts of an electrostatic precipitator by utilizing an impact force. An anvil is connected to a part of an electrostatic precipitator, such as, a section of electrodes either discharge electrodes or collecting plates or electrodes. A striker is engageable with an impact force on the anvil for vibrating the anvil as a result of the striker applying an impact force to the anvil. The vibration of the anvil is transmitted to the part. An elongated connector has one end connected to the striker. Crank means is connected to the elongated connector for raising the striker above the anvil and allowing the striker to drop into impact engagement with the anvil vibrating the anvil and the part of the electrostatic precipitator.

Abstract: This invention relates to an improved method and construction for straightening collector plates in an electrostatic precipitator by employing a torque bar. The torque bar includes an elongated bar which is positioned in an edge of a collector plate. A bracket is fixed to one end of the elongated bar. The bracket has an offset. A connector has one end fixed to a fixed portion of the electrostatic precipitator. A lock secures the bracket to the connector at a selected position to hold the elongated bar in a selected attitude. The method of straightening the plate includes a step of applying a torque moment to the elongated bar to apply a torque moment to the plate to straighten the plate.

Abstract: A pipe and tube end preparation apparatus for simultaneously cutting an inside and an outside chamfer on a tube end is herein disclosed. The apparatus generally includes a tube holder and a housing connected to the tube holder. A head carriage mechanism is connected to the housing. The head carriage mechanism is progressively axially movable with respect to the tube holder and the housing. A drive train is rotatably supported by the head carriage mechanism. A cutter head assembly is fixed to the drive train. The cutter head assembly includes an inside chamfer cutter and an opposed outside chamfer cutter, which acts as a cutting guide for the inside chamfer cutter. A tube end, which is to be prepared, is secured by the tube holder. The drive train rotates the cutter head assembly with respect to the tube end. The head carriage mechanism advances the rotating cutter head assembly into cutting engagement with the tube end, thus simultaneously forming an inside chamfer and an outside chamfer on the tube end.