In State v. Jackson, 213 Kan. 219, 225, 515 P.2d 1108 (1973), the court interpreted the requirements K.S.A. 22-2402: "In order to justify the search for weapons authorized under the provisions of subsection (2) of 22-2402, the officer must have prior knowledge of facts or observe conduct of the person or receive responses to the limited interrogation authorized by subsection (1) which, in the light of his experience, would cause the officer to reasonably suspect that his personal safety requires such search."