Lou Walcher, owner of the large San Francisco coin machine distributorship, Advance Automatic Sales, had an idea for a new type of pingame which used 5 balls ("one-balls" were definitely out) and which scored replays by lighting numbers in a given pattern. He then challenged the industry to design games using his new idea. As a result the first "in-line" or "bingo" type pingames came into being.
Bally's entry into this new field of games was BRIGHT LIGHTS, which had a playfield about the size of a "one-ball" and six 5 by 5 cards.
Before very long, these games, known as “BINGOS” were also being challenged in court as being "gambling devices" primarily due to the fact that they had no flippers (not much "skill factor") and because a player could win large numbers of replays which, in most locations, were paid off in cash by the proprietor.
United’s MANHATTAN Bingo Pin appears below. Note the insanely complicated mechanical scoring apparatus in the back-box!