Rockett, Frank H. Engineering Consultant, Charlottesville, Virginia.
Last reviewed:June 2020
- Related Primary Literature
- Additional Reading
Any of a wide variety of mechanisms, many used to open or close electrical contacts abruptly and all characterized by the control of a large force by a small one. The basic action of a toggle mechanism is shown in illus.a. When α = 90°, forces P and Q are independent of each other. Again, when α = 0° the forces are isolated, force Q being sustained entirely by the frame, and force P serving only to hold the link in position. At α = 45° from the symmetry |P| = |Q|, the mechanism serves to transfer the direction of forces to achieve equilibrium. If frame, connecting rod, and slider blocks with their pivots are sufficiently strong to support the maximum force encountered and if the coefficients of friction at the pin and slider joints are negligible, at intermediate positions the forces are related by the equation below.
The content above is only an excerpt.
for your institution. Subscribe
To learn more about subscribing to AccessScience, or to request a no-risk trial of this award-winning scientific reference for your institution, fill in your information and a member of our Sales Team will contact you as soon as possible.
to your librarian. Recommend
Let your librarian know about the award-winning gateway to the most trustworthy and accurate scientific information.
AccessScience provides the most accurate and trustworthy scientific information available.
Recognized as an award-winning gateway to scientific knowledge, AccessScience is an amazing online resource that contains high-quality reference material written specifically for students. Contributors include more than 10,000 highly qualified scientists and 46 Nobel Prize winners.
MORE THAN 8700 articles covering all major scientific disciplines and encompassing the McGraw-Hill Encyclopedia of Science & Technology and McGraw-Hill Yearbook of Science & Technology
115,000-PLUS definitions from the McGraw-Hill Dictionary of Scientific and Technical Terms
3000 biographies of notable scientific figures
MORE THAN 19,000 downloadable images and animations illustrating key topics
ENGAGING VIDEOS highlighting the life and work of award-winning scientists
SUGGESTIONS FOR FURTHER STUDY and additional readings to guide students to deeper understanding and research
LINKS TO CITABLE LITERATURE help students expand their knowledge using primary sources of information