Abstract: A pumpjack includes a walking beam pivotally connected to a vertical support for oscillation in a generally vertical plane about a first axis. A first end of the walking beam is connected to a sucker rod string. A carriage is movably mounted to the walking beam to move back-and-forth along a length of a tail end of the walking beam. A pitman arm has a first end pivotally connected to the carriage for rotation about a second axis and a second end pivotally connected to a crank arm. A counterweight is mounted to the crank arm and a hydraulic ram is connected to the carriage to move the carriage back-and-forth along the walking beam and establish reciprocation of the sucker rod string.

Abstract: A method for remotely administering a fault detected on an unmanned powered system that is controlled through a lead powered system, the method including detecting an operational fault on an unmanned powered system, communicating information about the fault to the lead powered system, through a wireless communication protocol operable with a wireless communication system, and communicating a reset message to the unmanned powered system to reset the fault detected. A system and computer software code, stored on a computer readable media and executable with a processor, are also disclosed for remotely handling a fault detected on an unmanned powered system that is controlled through a lead powered system.

Abstract: A method for remotely administering a fault detected on an unmanned powered system that is controlled through a lead powered system, the method including detecting an operational fault on an unmanned powered system, communicating information about the fault to the lead powered system, through a wireless communication protocol operable with a wireless communication system, and communicating a reset message to the unmanned powered system to reset the fault detected. A system and computer software code, stored on a computer readable media and executable with a processor, are also disclosed for remotely handling a fault detected on an unmanned powered system that is controlled through a lead powered system.

Abstract: A communications system having a common equipment unit and a plurality of telephone station sets coupled to the common equipment unit comprises a common equipment unit having at least one trunk interface for coupling at least one central office telephone line to the common equipment unit and an analog to digital converter for converting analog signals on the telephone line into digital form, and at least one station interface coupling the common equipment unit to at least one of the station sets by a single wire pair.