2.1 SOME POPULAR MECHANISMS

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Some basic mechanism types are listed below, and split into some suggested categories

2.1.1 Locking/Engaging

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Snap-action mechanisms - typically bistable mechanisms, such as electrical breaker switches, or toggle mechanisms such as XXXX

Clamping Mechanisms - vices, collets, etc.

Locational Devices - self alining/centering devices

Ratchets and Escapements - A locking mechanism, like a ratchet wrench or winch

Indexing Mechanisms - e.g. the geneva mechanism

Reversing Mechanisms - A mechanism that can disengage a transmission, and reverse direction of transmission

2.1.2 Motion Transmission/Transformation

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Linear Actuators - produce a straight line motion. can be done with threads, or hydraulic cylinders

Fine Adjustments - screws, wedges, etc. - these can overcome imperfections during manufacture

Couplings and Connectors - transmit rotations between rotating shafts. e.g. pulleys and belts

Sliding Connectors - transmit linear motions in different directions

2.1.3 Four Bar Linkages

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Swinging or Rocking Mechanism - produce cyclic motions

Stop/Pause/Hesitation - a motion is produced that appears to come to a stop for a short period of time.

Curve Generators - mechanisms set up to follow complex paths - typically four bar linkages.

Straight Line - mechanisms are set up to generate straight line motions

2.1.4 Reciprocating

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Reciprocating Mechanisms - converts a rotational motion to a linear motion

2.1.5 Six Bar Linkages

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These allow more complex motion, especially when ternary links are used.

In Watt linkages there are two ternary links touching,

In Stephenson linkages the terary links don't touch,