Compensating for the elongation of large chain or belt drives generally requires installation of two or more tensioning elements on the slack side of the chain. This is no longer necessary with the "Boomerang" tensioner. Because of its bent double arm equipped with two chain wheels or a combination of belt pulleys/flat rollers, the simple design triple compensates for chain or belt elongation caused by aging.
Due to the loop guiding of the chain, elongation is compensated three times.
Key to the Boomerang's success is a ROSTA rubber suspension element. Constructed of four pre-tensioned rubber inserts between the outer housing and the inner square-section tube, offset at an angle of 45º, the suspension element combines the functions of a torsion spring, a pivot bearing, and vibration damper—all in one. The element has no metal-to-metal contacts or friction, so operation is silent and maintenance-free.
Rich Kasprzyk, ROSTA LLC, 2655 Wisconsin Ave., Downers Grove, IL 60515; Tel: (630) 852-7762; Fax: (630) 852-1641; E-mail: email@example.com
Are they robots or androids? We're not exactly sure. Each talking, gesturing Geminoid looks exactly like a real individual, starting with their creator, professor Hiroshi Ishiguro of Osaka University in Japan.
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.