Electronic score-keeper for table tennis

An electronic score-keeper for table-tennis comprising:

• first and second scoring switches,
• first and second sets of numerical display devices,
• first and second serve indicators,
• a sucker's serve indicator,
• an electronic control circuit comprising first and second electronic counters and a serve controller,
• reset means,
• means for coupling said serve controller to said first and said second scoring switches and to said first and second serve indicators,
• means for coupling said first electronic counter to said first scoring switch and to said first set of numerical display devices,
• means for coupling said second electronic counter to said second scoring switch and to said second set of numerical display devices,
• said first electronic counter being responsive to actuation of said first scoring switch and said second electronic counter being responsive to actuation of said second scoring switch,
• said serve controller responding to the actuation of either of said first and said second scoring switches by appropriately controlling the energization of said first and second serve indicators, and
• said reset means being coupled to said first and said second electronic counters and to said serve controller,
• whereby when said first or second scoring switch is actuated by the associated player each time a point is gained, the associated said sets of display devices register the running score of each player, said first and said second service indicators being alternately energized as appropriate to identify which of said players has the responsibility for the serve,
• at the conclusion of the game, when said reset means is actuated by one of the players said first and said second counters and said serve controller are reset to zero for the start of another game,
• wherein said serve controller comprises a five-point shift controller, and
• a twenty-point disable network,
• said five-point shift controller being coupled to said first and said second serve indicators and to said first and said second scoring switches,
• said twenty-point disable network being coupled to said first and said second electronic counters, to said five-point shift controller, and to said sucker's serve indicator,
• said five-point shift controller being responsive to said first and said second scoring switches until disabled by said twenty-point disable network,
• said twenty-point disable network being responsive to said first and said second electronic counters, and
• said sucker's service indicator being responsive to said twenty-point disable network,
• whereby said five-point shift controller selectively energizes one or the other of said first and said second serve indicators prior to the scoring of a total of twenty points by either of the opposing players and the twenty point disable network responds to the twentieth point scored by either of the players by causing said first and second serve indicators to be deenergized and said sucker's serve indicator to be energized for the remainder of the game.