Load indicating member, apparatus and method

Measuring and testing – Specimen stress or strain – or testing by stress or strain... – Threaded fastener stress

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G01L 104

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active

046761098

ABSTRACT:
A method of measuring the load in a member subjected to longitudinal stress, a load measuring device and a fastener tightening device using the method of measuring, a load indicating member and a load indicating fastener for use in conjunction with the method of measuring, a method of making the load indicating fastener, and a method of tightening the load indicating fastener. A preselected end of a pin is secured to a shank of a load indicating member, such as a load indicating fastener, in a manner such that the pin is unaffected by the elastic deformation of the shank in response to longitudinal stress. Coplanar first and second flat surfaces are formed, respectively, adjacent to the longitudinal ends of the pin and the shank furthest from the preselected end of the pin such as to provide reference surfaces for the measurement of the elongation of the shank in response to longitudinal stress.

REFERENCES:
patent: 2503141 (1950-04-01), Stone
patent: 2562831 (1951-07-01), Stone
patent: 2995033 (1961-08-01), Stifano
patent: 3248923 (1966-05-01), Blakeley
patent: 3799108 (1974-03-01), Mosow
patent: 3943819 (1976-03-01), Charron
patent: 4525114 (1985-06-01), Hirst

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