When crank 1 rotates about fixed axis B, link 9, connected by turning pairs C and D to crank 1 and to roller 10, oscillates and the roller is rolled along surface a of link 3. This oscillates lever 2 about fixed axis A, applying a variable load to test piece 8. Guide surface a, inclined with respect to lever 2, can be turned by special device 4 to regulate the applied load. In testing with a static load it is applied by a pump delivering fluid to cylinder 5. Plunger 6 transmits the load to upper grip 7.
$3941$LHP,M$