Clutch

A clutch is a mechanical device that engages and disengages the power transmission, especially from driving shaft to driven shaft.

Clutches are used whenever the transmission of power or motion must be controlled either in amount or over time (e.g., electric screwdrivers limit how much torque is transmitted through use of a clutch; clutches control whether automobiles transmit engine power to the wheels).

In the simplest application, clutches connect and disconnect two rotating shafts (drive shafts or line shafts). In these devices, one shaft is typically attached to an engine or other power unit (the driving member) while the other shaft (the driven member) provides output power for work. While typically the motions involved are rotary, linear clutches are also possible.

In a torque-controlled drill, for instance, one shaft is driven by a motor and the other drives a drill chuck. The clutch connects the two shafts so they may be locked together and spin at the same speed (engaged), locked together but spinning at different speeds (slipping), or unlocked and spinning at different speeds (disengaged).

Clutch (sports)

Clutch performance in sports is the phenomenon of athletes under pressure, often in the last minutes of a game, to summon strength, concentration and whatever else necessary to succeed, to perform well, and perhaps change the outcome of the game. It occurs in basketball, hockey, football, and other sports. The opposite is "choking": failing to perform as needed, when under pressure.

It is a phenomenon that is studied in psychology and in the more specialized area of sport psychology. The greatest part of the academic literature is focused on baseball, specifically on clutch hitting, and addresses the academic issue of whether it exists or not.

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Clutch (pin fastener)

A butterfly clutch is a device that attaches to the back of a tack pin to secure an accessory to clothing.

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Wishbone

Wishbone commonly refers to the furcula, a y-shaped bone in birds and some other animals.

Wishbone may also refer to:

Wishbone (computer bus)

The Wishbone Bus is an open source hardware computer bus intended to let the parts of an integrated circuit communicate with each other. The aim is to allow the connection of differing cores to each other inside of a chip. The Wishbone Bus is used by many designs in the OpenCores project.

A large number of open-source designs for CPUs and auxiliary computer peripherals have now been released with Wishbone interfaces. Many can be found at OpenCores, a foundation that attempts to make open-source hardware designs available.

Wishbone is intended as a "logic bus". It does not specify electrical information or the bus topology. Instead, the specification is written in terms of "signals", clock cycles, and high and low levels.

This ambiguity is intentional. Wishbone is made to let designers combine several designs written in Verilog, VHDL or some other logic-description language for electronic design automation. Wishbone provides a standard way for designers to combine these hardware logic designs (called "cores"). Wishbone is defined to have 8, 16, 32, and 64-bit buses. All signals are synchronous to a single clock but some slave responses must be generated combinatorially for maximum performance. Wishbone permits addition of a "tag bus" to describe the data. But reset, simple addressed reads and writes, movement of blocks of data, and indivisible bus cycles all work without tags.

Wishbone (TV series)

Wishbone is a half-hour live-action children's television show that was produced from 1995 to 2001 and broadcast on PBS Kids. The show's title character is a Jack Russell Terrier. Wishbone lives with his owner Joe Talbot in the fictional town of Oakdale, Texas. He daydreams about being the lead character of stories from classic literature. He was known as "the little dog with a big imagination". Only the viewers and the characters in his daydreams can hear Wishbone speak. The characters from his daydreams see Wishbone as whichever famous character he is currently portraying and not as a dog. The show won four Daytime Emmies, a Peabody Award, and honors from the Television Critics Association. Wishbone's exterior shots were filmed on the backlot of Lyrick Studios's teen division Big Feats! Entertainment in Allen, Texas and its interior shots were filmed on a sound stage in a 50,000 square foot warehouse in Plano, Texas. Additional scenes were filmed in Grapevine, Texas.