Original Publication Date: 1984-Mar-01
Included in the Prior Art Database: 2005-Feb-03
Vertical lifting of objects or tools in the 10-8m range is important in connection with the treatment or investigation of surfaces. This article describes a jack (Fig. a) which comprises two wedge-shaped blocks 1 and 2. Block 1 can be horizontally moved on a bench 3 by means of a piezoelectric rod 4 rigidly fixed between block 1 and a frame 5, while block 2 is secured against horizontal movement by a guide 6. Contraction of rod 4 by Wx causes block 1 to be moved to the right and block 2 to be lowered through Wx $ tga, where a is the wedge angle. In an alternative arrangement (Fig. b), blocks 1 and 2 are separated by a dielectric 7. With a potential applied between blocks 1 and 2, they electrostatically clamp to one another, and elongation of rod 4 by Wx results in a corresponding horizontal displacement of both blocks.