FF-1111 Toggle Joint Apparatus

This unit is used to study the workings of a toggle joint. Toggle joint is an apparatus consisting of 3 members. The members are joined together to form a triangular shape. Of the three members, two have fixed length while the third member, also called the base member, can have variable length. The length of the base member is not fixed as when some load is applied at the top of the triangular structure, the length of base member changes under tension. This entire apparatus is supported on a metallic base structure. The base structure isfixed at one end but the other end is moveable. At the top of the triangular structure, there is a hangar attached. Hangar is there so that some weights can be loaded on the toggle joint. There is a spring balance at the base of the toggle joint which would show the elongation and the force acting on the moveable end of the base structure due to the applied load. Using this table apparatus, the reaction forces as a function of the lever angle can be demonstrated based on the example of a loaded toggle joint. To determine the forces, straightforward force resolution is used. The apparatus is of robust, solid metal construction. Using the adjustment device, the angle can be continuously adjusted between 30* to 135*. The horizontal force in the bearing is determined using a spring balance. A set of weights permits the load to be varied in steps.