Multiple Coin Pinballs
When the pinball industry began in the early Thirties the main competition to the fledgling pinball machines were the three reel slot machines, commonly referred to as "bell machines". Slot machines were still legal in many areas of the country at that time and were a major product of the coin machine industry.
Slot machine players deposited many coins in a relatively short period of time as opposed to pinball in which a game of 5 or 10 balls - at a penny or nickel a game - lasted a minute or two. The introduction of electricity (first from batteries and then A.C.) into pinball during the 1934-1936 period made possible a new concept in pinball design, the "multiple coin" pinball. In this type of pingame the player could deposit more than one coin (if desired) before starting the game to increase his chances of winning. In addition, in most of these games, the number of balls per game was decreased to one and these games were soon referred to as "one-ball machines".