The indexer was initially developed for bicycle gear shifting to keep rides within a predetermined pedaling cadence range.
A patented mechanical indexer indexes a fixed number of degrees when the motor input shaft reaches a preset speed. The initial 2.5-inch diameter model has five indexes and rotates through 17 degrees. For other models, the angle varies by the number of indices and size of the unit. When a preset speed is attained, a flyweight with a helical segment engages and interlocks with a helical thread on the inside bore of the housing. This action advances the output drum one index. If the input shaft drops a fixed amount below the present speed, the mechanism will index back to its original start position. If the input shaft speed drops to a speed between the advance and return speed, a ball-detent mechanism will stop indexing and hold position. The speed differential at which the indexer will advance, hold, or return is adjustable by changing the helix' circumferential position. Applications include advance or retard speed indexing such as on bicycle shift mechanisms.
Oliver Tysver, T DESIGN LTD, W76N1062 Hampton Ave; Cedarburg, WI 53012 Tel: (262) 375-8727; E-mail: email@example.com.
Truchard will be presented the award at the 2014 Golden Mousetrap Awards ceremony during the co-located events Pacific Design & Manufacturing, MD&M West, WestPack, PLASTEC West, Electronics West, ATX West, and AeroCon.
Robots that walk have come a long way from simple barebones walking machines or pairs of legs without an upper body and head. Much of the research these days focuses on making more humanoid robots. But they are not all created equal.
The IEEE Computer Society has named the top 10 trends for 2014. You can expect the convergence of cloud computing and mobile devices, advances in health care data and devices, as well as privacy issues in social media to make the headlines. And 3D printing came out of nowhere to make a big splash.
For industrial control applications, or even a simple assembly line, that machine can go almost 24/7 without a break. But what happens when the task is a little more complex? That’s where the “smart” machine would come in. The smart machine is one that has some simple (or complex in some cases) processing capability to be able to adapt to changing conditions. Such machines are suited for a host of applications, including automotive, aerospace, defense, medical, computers and electronics, telecommunications, consumer goods, and so on. This discussion will examine what’s possible with smart machines, and what tradeoffs need to be made to implement such a solution.