Ironically during the silver age, the various heroes that gained superpowers through accidents often used their under super-minds to develop superior gadgets that aided them. Beyond the mere web-shooters and gamma-gadgets of the day, perhaps the most prolific of these was Barry Allen, the Flash of Earth-One. He invented the Cosmic Threadmill, a device that absorbs cosmic energy (ever abundant, ask Ted Knight) and allowed the operator to travel through time guided by a radioactive pulses from a cosmic ray clock. Beside this time (and dimension) travel device, Barry also devised a ring that housed a specialized chemical compound that shrunk fabric to fit within its housing, and then eject said fabric into a full-sized costume, hence the Flash's quick changes.
His counterpart on Earth-Two, Jay Garrick aka the Flash, himself improved upon Barry's designs and created the Time Vortex, which like the Treadmill sent the rider(s) through the ages to the desired temporal destination. In addition, it generated a force field which projected a fabric generator, which through programming specifically designed the necessary garb for the travelers during their journey. And it was a silver age Rosetta Stone translator! Take that, Allen!