Fuse
In 1852, Elisha Otis invented a freight elevator equipped with a safety device to prevent falling in case the supporting cable would break.
The purpose of a safety device is to reduce the danger of injury.
A Safety Sentry Trailer Device is a Safety Device that will prevent Accidental Separation from Towing Vehicle and Towed Trailer.
This safety device is called a fusible link that is situated inside of a fuse cartridge.
J.L. Love invented the "Love's Safety Lock," a device designed to improve safety in the operation of railway trains. This invention aimed to prevent accidents by ensuring that trains could not be accidentally set in motion. Love's design contributed to advancements in railway safety protocols during its time.
King Camp Gillette invented the throw away blades with the help of William Nickerson.
Force and motion might be associated with a safety device.
Blanchard, French aeronaut (Balloonist) also invented the parachute as a safety device. The date looks okay.
The safety pin was invented to pay off a debt.
Vakavtchiev and Violin invented the neutral safety switch.
King C. Gillette invented it.King Camp Gillette invented the safety razor in 1903
If it pertains to electrical controls on a machine then the safety device is called an emergency stop button.