Joy buzzer

When the wearer shakes hands with another person, a button on the disc releases the spring, which rapidly unwinds creating a vibration that mimics an electric shock to the unsuspecting victim.

[1] The joy buzzer was invented in 1928 by Soren Sorensen "Sam" Adams of the S.S. Adams Co.[2] It was modeled after The Zapper, a product that was similar to the joy buzzer, but did not have a very effective buzz and contained a button with a blunt point that would hurt the recipient's hand.

The instant success of the new item allowed Adams to move to a new building and increase the size of his company.

[citation needed] In 1987, Sam Adamses' son, Joseph "Bud" Adams, redesigned the mechanism for greater durability and a louder buzz, marketing it as the Super Joy Buzzer.

[citation needed] A common misconception, largely due to false advertising by the makers of the device, is that the joy buzzer delivers an electric shock, when in fact it only causes a vibration simulating a shock.