Gräfenberg — Chambers's Encyclopaedia

A detailed technical illustration of a circular dividing-engine. The device consists of a large circular plate (A) mounted on a central vertical column (E). The plate is divided into numerous radial segments. A tangent-screw (TT') is positioned along the edge of the plate, with a handle (T') for turning it. A carriage (D) is attached to the screw, and a dividing-knife is mounted on it. The entire assembly is supported by a sturdy frame with four legs. Various adjustment screws and handles are visible, including a disc-shaped head (T) and a handle (K) for the tangent-screw. The illustration is labeled with letters A, C, D, E, K, P, T, and TT' to identify specific components. — Fig. 2.—Dividing-engine.

Gräfenberg, a village in the north-west corner of Austrian Silesia, 50 miles N. of Olmütz. It is celebrated as the spot where the water-cure (see HYDROPATHY) was introduced in 1826 by Vincenz Priessnitz (1799-1851). It still is visited yearly by some 1500 persons. on any work laid on the divided circle. Fig. 2 represents one form of the instrument. A, A is the circle, usually 4 or 5 feet in diameter, divided at its edge, and ratched into teeth at its lower edge, C. The axis of the circle is in the column, E. TT' is the tangent-screw; T', a handle for turning it; T, a disc-shaped head, the divisions on the circumference of which allow of the number of whole and fractional turns of the screw being counted. The carriage, D, in which works the dividing-knife (not seen in the figure), may be adjusted to different heights by the screws on the pillars, P, which support the parallel beams on which the dividing-knife carriage moves; it may also be adjusted to circles of different radii