advantages of crank &slotted mechnism
spefications ,diisadvantages

crank mechanism advantages and disadvantages

What is a Crank and Slider?
The rotating part is called to be the crank and the piston which is made to move forword and backword is said to be the the slider. in case of automobiles the input energy or the valve motion of the slider rotates tehe crank as well and the force that has been supplied to the slider produces the torque on the crank which helps in the rotation of the wheel as aresult the vehical starts moving.The other examples are Reciprocating pumps, Reciprocating comprssor etc. And also in case of the Typewriter,Clocks etc, the force that has been suplied to the slider is unable to over come the friction of the crank and hence the force is utilise as much it is required.

What are the advantages of scotch yoke mechanism over slider crank mechanism?

Reduced friction, smoother operation, more power delivered.
A big disadvantage is that the slot in the yoke wears rapidly due to sliding friction.