Patent ID: 11885772
Assignee: ILLINOIS TOOL WORKS INC.
Field: Measurement (Instruments)
Classification: CPC G  H  Y | IPC G

Claim 0:
1. A material testing system, comprising:
a material testing apparatus configured to receive an electrical supply, wherein the material testing apparatus comprises:
guide means;
sample holding means configured for holding a sample;
force means configured for applying force to the sample; and
a crosshead arranged to support at least a portion of one or both of the sample holding means and the force means, wherein the crosshead is moveable about the guide means;

a three phase switched-mode power supply unit arranged to provide the electrical supply to the material testing apparatus; and
one or more blocking means connected with a power output of the three phase switched-mode power supply unit, wherein the blocking means is arranged to prevent an electrical current at the power output of the three phase switched-mode power supply unit from flowing in a predetermined direction.