While residing in Phoenix, Armstrong made a living for almost 25 years off a patented invention that he devised for mounting aluminum-coated Mylar screens in car and truck windows to deflect the brutal Southwestern sun.

• 当他住在美国亚利桑那州凤凰城时，将近25年的时间，他以自行发明的专利维生；这项专利是用在车内与车窗上的镀铝聚酯树脂薄膜，可以抵挡美国西南部无情的阳光。