Abstract: A cordless extension cord for providing access to electrical power wirelessly to one or more corded electrical devices situated remotely from a power source. The cordless extension cord comprises a male plug and a female plug socket, wherein the male plug is configured to connect to a conventional power source and convert electrical energy into electromagnetic waves to be sent to the female plug socket and the female plug socket is configured to convert electromagnetic waves received from the male plug into electricity while physically engaged to conventional electrical plugs of electrical devices so as to provide such electricity through the conventional electrical plugs to the electrical devices. In this manner, the cordless extension cord allows electrical devices to receive electricity through their existing cord/plug structure without placement location being limited the length of the cord.

Abstract: An apparatus for simultaneously measuring longitudinal and shear wave speeds in materials under load via echo or transmission is described. The apparatus comprises a housing with an open end, a closed end opposite the open end with a hole in the closed end, and a housing exit port. A spacer resides inside the housing, the spacer having a spacer specimen side and a spacer transducer side. A load transferring body having a transducer hole fits inside the housing and contacts an interior surface of the housing. An ultrasonic transducer fits inside the transducer hole of the load transferring body. A transducer depressing mechanism secures the ultrasonic transducer against the spacer transducer side, whereby users can simultaneously measure longitudinal and shear wave speeds of specimens inserted into the hole in the closed end of the housing and contacting the spacer.

Abstract: A general method for simultaneously measuring longitudinal and shear wave speeds in materials under load via echo or transmission is described. This process proceeds in simple steps. Users load a specimen, either compressionally, tensilely, or torsionally and the loading is directed along a loading axis. Users connect a transducer with the specimen without loading the transducer and connect the transducer with a data collection apparatus. An ultrasonic pulse is launched from the transducer into the specimen along the loading axis, simultaneously triggering the data collection apparatus. The user measures signals on the data collection apparatus, allowing the user to calculate longitudinal wave speeds and shear wave speeds, whereby both longitudinal wave speeds and shear wave speeds of specimens under load can be measured simultaneously using one transducer. A novel device for measuring longitudinal and shear wave speeds in materials simultaneously is also described.