A quarter-turn screw typically uses a spring feature to keep it in place when it is in a locked position. The attached components are firmly held in place, but under spring load, they can still move and are susceptible to loosening under vibration. In sealing applications, spring-loaded designs can be a problem because they don't provide a very tight joint.
This quick-insertion, quarter-turn screw clamps as well as a standard threaded screw.
This D-shaped threaded screw inserts and is held captive in a round clearance hole. The mating part uses a D-shaped hole to create a quick-insertion-type screw that, when rotated a quarter turn, engages the straight section of the D hole to provide a clamping force.
Bernie Leibman, Xerox Corp.,800 Phillips Rd., M.S. 111-06J, Webster, NY 14580; Tel: (716) 422-1294; Fax: (716) 422-3321; E-mail: Bernie.leibman@ usa.xerox.com.
Festo's BionicKangaroo combines pneumatic and electrical drive technology, plus very precise controls and condition monitoring. Like a real kangaroo, the BionicKangaroo robot harvests the kinetic energy of each takeoff and immediately uses it to power the next jump.
Design News and Digi-Key presents: Creating & Testing Your First RTOS Application Using MQX, a crash course that will look at defining a project, selecting a target processor, blocking code, defining tasks, completing code, and debugging.
These are the toys that inspired budding engineers to try out sublime designs, create miniature structures, and experiment with bizarre contraptions using sets that could be torn down and reconstructed over and over.
PowerStream is deploying the microgrid at its headquarters to demonstrate how people can generate and distribute their own energy and make their homes and businesses more sustainable through renewables.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.