Material testing machine with screw columns made expandable

Details Material testing machine with screw columns made expandable Material testing machine with screw columns made expandable

1992-03-24

1993-11-23

Myracle, Jerry W.

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

By loading of specimen

254 98, G01N 308

Patent

active

052633730

ABSTRACT:
A material testing machine devised so as to be capable of complying with a long test piece without employing a long-sized screw columns. The machine consists essentially of a pair of intermediate rods rotatably installed on a table for being driven by a motor, a pair of screw columns screw-cut in the region corresponding to a possible elongation of a test piece and devised so as to be expandable with respect to and rotatable integrally with the pair of intermediate rods, holder means for rotatably holding the screw columns at any desired position of expansion, and a crosshead having both its ends screw-engaged with the pair of screw columns for being driven through the rotation of the screw columns to exert force on a test piece between the same and the table.

REFERENCES:
patent: 1208748 (1916-12-01), Chew
patent: 2352600 (1944-07-01), Brackett

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