Gruebler Paradoxes
There are some examples of paradoxes which disobey the Gruebler’s criterion due to their unique geometry. The designer needs to
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Types of Vibration
Free Vibrations: Elastic vibrations in which there are no friction and external forces after the initial release of the body. Forced
Read MoreType of Governors
Centrifugal governors: Its action depends on the change of speed and centrifugal effect produced by the masses, known as governor
Read MoreCompound Gear Train
When a series of gears are connected in such a way that two or more gears rotate about an axis
Read MoreStatic Balancing
Static Balancing A system of rotating masses is said to be in static balance if the combined mass centre of
Read MoreClassification of Gear
Parallel Shafts Spur Gears: They have straight teeth parallel to the axes and thus are not subjected to axial thrust
Read MoreTypes of Cam
According to Shape Wedge and flat cams: A wedge cam has a translational motion. The follower can either translate or
Read MoreKleins Construction
In Klein’s construction, the velocity and the acceleration diagrams are made on the configuration diagram itself. The line that represents
Read MoreCoriolis Acceleration Component
The Coriolis component is positive if the link AR rotates clockwise and slider moves radially outwards or if the link
Read MoreTheory of Instantaneous Centre
Instantaneous centre of rotation or virtual centre. Let a plane body ‘P’ having non-linear motion relative to another plane body
Read MoreFour-Bar Mechanism
Grashof’s law s + l ≤ p + q Here, s = Shortest link, l = Longest linkp, q =
Read MoreDegrees of freedom
The connection of a link with another imposes certain constraints on their relative motion thus, Degrees of freedom = 6
Read MoreTypes of Constrained Motion
Completely constrained motion: When motion between two elements of a pair is in a definite (single) direction irrespective of the
Read MoreRELIEF DISPLACEMENT
Relief is the elevation of object above or below the datum. Relief displacement is the lateral displacement (also called as
Read MoreGROUND CO-ORDINATES
These co-ordinates are measured with respect to x-axis and y-axis. The origin of these axes is at the datum principal
Read MoreAERIAL PHOTOGRAPH
Aerial photograph is the photograph of an area taken from air with a camera mounted on an aircraft. This image
Read MoreUSE OF TRIANGULATION
Triangulation survey is conducted for one or more of following purposes: For establishing accurate ground control points for photogrammetric survey
Read MorePRINCIPLE OF TRIANGULATION
In triangulation, the whole area under consideration is covered with a framework of triangles. It is based on the principle
Read MoreTANGENTIAL METHOD OF TACHEOMETRY
In the absence of stadia hairs, the tangential method of tacheometry is resorted to. This method is used when the
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