Today in 1934, Laurens Hammond patented his pipeless organ.  Here are some more facts about the organ.

FACT:  Laurens Hammond was originally a clock maker, and the sounds created by his electronic clocks gave him the idea for his pipeless organ.
FACT:  Laurens Hammond's organ became a popular church instrument, because it was more affordable than the traditional pipe organ. 
FACT:  In the early 20th century, organs were commonly featured in movie theaters, and were played to accompany silent films.
FACT:  Johann Sebastian Bach is considered the most famous composer of organ music.