Design and Fabrication of staircase elevator with lead screw mechanism for elderly peopleKilaru Kalpana, M. Balavanth Reddy, Shaik Sailani, E. Poornima and Prashant ChaudharyE3S Web Conf., 430 (2023) 01144DOI: https://doi.org/10.1051/e3sconf/202343001144