Fairground strikers and similar games of strength are as old as the fairground itself. Coin-operated Strength Testers first appeared with Robert William Page's patent of 1885. By measuring a force applied to a spring or counter-weight, they were mechanically similar to weighing scales. Testing grip, twist, punch and blow (spirometers), they were popular in the hard-living, working class culture of the industrial age. An alternative to arm wrestling, they could be used to settle wagers or impress the opposite sex with demonstrations of physical prowess.