1,4 addition to α,β-unsaturated carbonyls?
It is called 1,4 - addition because when you go through the mechanism of this reaction, then actually you will find that the carbonyl bond will break and oxygen will get negative charge. 
Then nucleophilic will attack on beta carbon, i.e. carbon at 4th position and proton will migrate to negative oxygen which is at first position. Double bond will form between the carbonyl carbon and  carbon at 3rd position.

Thus, 1,4-addition takes place. But in the last step, keto-enol tautomerism takes place. And proton transfer takes place from oxygen to the carbon alpha to carbonyl. Therefore, final product is again saturated carbonyl compound.