 Why did Kalvin continue researching on his own at home?
Kalvin Feetch shrunk visibly. "But Mr. Piltdon," remonstrated Feetch unsteadily under his employer's glare, "don't you remember? I want it completely developed, engineered and tooled-up, ready for production. "But Mr. Piltdon, four months is hardly time enough for development, even with an adequate staff. I've been trying to tell you for years that we're bound to fall behind because we don't have enough personnel to conduct research. A designer had to dream at his board, investigate, search, build, test, compare, discard. He had always wanted to devote all his time to research, but Piltdon Opener had not given him that opportunity. Twenty-five years of close supervision, dead-lines, production headaches, inadequate facilities and assistance. What had happened, to the proud dream he once had, the dream of exploring uncharted engineering regions, of unlimited time to investigate and develop? Ah, well, thought Feetch straightening his thin shoulders, he had managed somehow to design a few good things during his twenty-five years with Piltdon. Twenty-five years of your life you put in with Piltdon, and he'd fire you just like that if you don't do the impossible. "I drew my pay every week so I suppose I have no complaints. Nine completed and tested, two in work. Several days later, however, Piltdon himself charged into the drawing room and slapped Feetch heartily on the back, causing him to break a pencil point.
 He wanted to better understand the technology and create a solution.
 He wanted to be sure it was safe.  He needed to work extra hours to meet the deadline.  He wanted to patent the Super-Opener idea for himself.  He wanted to better understand the technology and create a solution.