Who invented stiforator automatic cooler and electric grinders?

The Stiforator Automatic Cooler was invented by Alfred Charles Gilbert. He was an American inventor and toymaker who founded the A.C. Gilbert Company in 1909. The Stiforator was one of Gilbert's most popular inventions. It was a tabletop cooler that used a fan to circulate cold air around a water tank. The water tank was made of glass and had a capacity of about one gallon. The fan was powered by an electric motor. The Stiforator was first sold in 1931 and was a popular product for many years.

Electric Grinders

The first electric grinders were invented in the late 19th century. The first electric coffee grinder was invented in 1883 by John Oster. Oster's grinder used a small electric motor to turn a burr mill. The burr mill was made of two metal discs with sharp edges. The coffee beans were placed between the discs and the motor powered the discs so they rubbed against each other, grinding the beans into a fine powder. Oster's grinder was a commercial success and was soon followed by other electric grinders.

In 1895, an American inventor named Thomas Edison patented an electric meat grinder. Edison's grinder used an electric motor to power a series of knives that cut the meat into small pieces. The meat was then forced through a series of holes in a screen, producing ground meat. Edison's meat grinder was also a commercial success and helped to popularize the use of electric grinders in homes and restaurants.