| 摘要 |
1,030,191. Bowling alleys. AMERICAN MACHINE & FOUNDRY CO. Jan. 15, 1963 [Jan. 16, 1962], No. 1796/63. Heading A6D. A system for indicating to a bowler the optimum path for the second ball of a frame in the pin bowling games comprises an indicator operated by a ball path selector unit, the latter being primed for operation by means (such as switches on the pinsetter deck) which sense the pins remaining standing on the playing deck after the first ball of the frame. The ball path selector unit comprises a plurality of groups of relay-operated, normally open contacts, each group of contacts corresponding to a particular pin position, and the contacts thereof being closed when the pin sensing mechanism detects that the corresponding pin is standing on the playing deck. The contacts are additionally wired in circuits corresponding to different pin combinations, the circuits each including means such as a lamp or switch forming part of the indicator. Depending on the combination of pins remaining standing after the first ball of the frame, the associated circuit of contacts in the ball path selector unit is made, and the indicator operated to illustrate the optimum ball path for that particular pin combination. The lamps or switches referred to above respectively illuminate arrows on an indicator board (Fig. 11), or control the travel of an index number 152 round the periphery of the indicator board (Fig. 8) so that the index is arrested at the optimum point of entry of the ball into the array. The indicators illustrated additionally comprise an array of lamps corresponding with an array of ten pins on the playing deck of the alley, the lamps being selectively operated by the pinsensing means to give a visual indication on the indicator of the pins remaining standing after the first ball of the frame. The apparatus may also comprise switches for operation by the bowler and which control means on the indicator for indicating the optimum ball path for the first ball of the frame. |
