Lafayette College

David M Mante

Zachary W Coleman

Aaron Buck

A sensor device for detecting static modulus of elasticity in situ comprising: top and bottom frame end plates, the top and bottom frame end plates connected by frame side bars; a dry cavity connected to the top frame end plate and comprising a piston, precompression mechanism, and piston transfer plate; a displacement measurement gauge extending from the dry cavity along a longitudinal axis of the sensor device having a first end in contact with the piston transfer plate and a second end in contact with a bottom inner face of the bottom frame end plate; and a top inner face connected to the piston transfer plate wherein a portion of elastomeric material is positioned on the bottom and top inner faces, the elastomeric material positioned to prevent contact with either bottom or top inner faces except for a portion along the longitudinal axis of the displacement measurement gauge.

Sensor for concrete static modulus of elasticity in situ measurement

A sensor device for detecting static modulus of elasticity in situ comprising: top and bottom frame end plates, said top and bottom frame end plates connected by at least two frame side bars; a dry cavity connected to said top frame end plate comprising a piston, precompression mechanism, and piston transfer plate; a displacement measurement gauge extending from said dry cavity along a longitudinal axis of said sensor device having a first end in contact with said piston transfer plate and a second end in contact with a bottom inner face of said bottom frame end plate; and a top inner face connected to said piston transfer plate, wherein a portion of elastomeric material is positioned on said bottom and top inner faces, said elastomeric material positioned to prevent contact with either bottom or top inner faces except for a portion along the longitudinal axis of the displacement measurement gauge.

A surface marked threaded fastener comprising an elongated and threaded shaft and a head at one end of the elongated and threaded shaft; said head comprising on a surface contacting face a readable matrix comprising a dot pattern, said dot pattern defining a tightening specification.

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Easton, PA, United States of America

David M Mante