And he brought forth the king's son, and put the crown upon him, and gave him the testimony; and they made him king, and anointed him; and they clapped their hands, and said, God save the king. Put the crown upon him - This was a diadem or golden band that went round the head.
And - the testimony - Probably the book of the law, written on a roll of vellum. This was his scepter. Some think that it was placed upon his head, as well as the diadem. The diadem, the testimony, and the anointing oil, were essential to his consecration.
They clapped their hands - This I believe is the first instance on record of clapping the hands as a testimony of joy.
God save the king - יחי המלך yechi hannmelech; May the king live! So the words should be translated wherever they occur.