Across
- 1. Most notable for his invention of the gas mask in 1912 and the three-light traffic system in 1922.
- 3. Developed the first automatic clothes dryer that used a series of suspension rods over a specifically designed stove to dry clothes.
- 4. Invented the first home security system in 1966 as a solution to the high crime rate they experienced in the neighborhood of Queens, New York.
- 7. Invented the first outdoor mailbox that featured a hinged door that kept the letters secure but also kept out rain and snow.
- 8. Received the patent for his automatic gear shifter in 1932 and it was quickly welcomed by major vehicle companies.
Down
- 1. Created an “improved golf tee” made out of rubber and wood, but he was also a dentist and became the first African American to become a professor at Harvard University.
- 2. Invented the “Chamber Commode,” which is essentially a toilet that featured a mirror, bookrack, washstand, table and easy chair.
- 5. Made significant improvements to the folding chair making it extremely portable.
- 6. Invented a heating system that drew in cold air and conveyed the heat through a heat exchanger.
- 9. Came up with the inspiration for the automatic elevator doors after watching his daughter Grace suffer a life-threatening injury when she fell down an elevator shaft.