Spherical Geneva Mechanism

Spherical Geneva mechanism is a type of intermittent motion mechanism. It translates a continuous rotation into intermittent rotary motion. The driver and the driven wheels are on perpendicular shafts. The rotating drive wheel has a pin that reaches into a

Difference between a machine and a structure

Before we go through the difference between a machine and a structure, let’s first see what they are. Once we comprehend that, understanding the difference between them will be a cakewalk for us. Machine: A machine typically contains mechanisms that

Linear Geneva Mechanism

Linear Geneva mechanism is a type of intermittent motion mechanism. It translates a continuous rotation into intermittent linear motion. The crank (driver) has a pin that reaches into a slot of the slider. The driver wheel has a raised circular

Grashof’s Law

Consider this four bar mechanism: s = length of the shortest link l = length of the largest link p and q = lengths of the other two links By Grashof law, for at least one link to be capable

Ratchet and Pawl Mechanism

Ratchet and Pawl mechanism is a type of intermittent motion mechanism. It allows the rotation of the shaft in one direction only and prevents its motion in the other direction. It consists of an arm that pivots about the center

Difference between Machines and Mechanisms

What is a mechanism? A mechanism is a device which transforms motion to some desirable pattern and typically develops very low forces and transmits little power. Some examples of common mechanisms are a pencil sharpner, a camera shutter, an analog

Difference between Kinematics and Kinetics

Kinematics and Kinetics Kinematics: The study of motion without regard to forces.Kinetics: The study of forces on systems in motion. These two concepts are really not physically separable. One cannot design most dynamic mechanical systems without taking both topics into

Need for another law after the First Law of Thermodynamics

Inadequacy of the First law of thermodynamics and the need for another law: It is common experience that a cup of hot coffee left in a cooler room eventually cools off. This process satisfies the first law of thermodynamics since