Abstract: A surgical instrument, has an end effector that includes an ultrasonic blade, and a clamp arm that moves relative to the ultrasonic blade from an opened position toward an intermediate position and a closed position. The clamp arm is offset from the ultrasonic blade to define a predetermined gap in the intermediate position between the opened position and the closed position. A clamp arm actuator connects to the clamp arm and moves from an opened configuration to a closed configuration to direct the clamp arm from the opened position toward the intermediate position and the closed position. A spacer connects with the clamp arm to inhibit movement of the clamp arm from the intermediate position toward the closed position for maintaining the predetermined gap between the clamp arm and the ultrasonic blade.

Abstract: A modular support structure for scale-model railroad tracks utilizes a plurality of planks, a plurality of suspension members for suspending at least some of said planks from an architectural structure, and a plurality of rails interconnecting said planks. The rails and planks define a modular support structure suitable for supporting a scale-model railroad track. The modular support structure is easily installed with a minimum of labor. The modular support structure optionally utilizes a plurality of support members for supporting at least some of said planks above a surface, such as soil, stone, concrete, floors, etc.