Photoelectric pinfall detection system

Details Photoelectric pinfall detection system Photoelectric pinfall detection system

1997-04-17

1999-05-11

Pierce, William M.

Games using tangible projectile

Bowling

Handling of pin or pin representation

473 65, 473 69, A63D5/04

Patent

active

059021888

ABSTRACT:
A bowling alley is provided with a photoelectric pinfall detection system which includes a pinfall detection device by means of which it can be recognized whether or not a fallen pin is lying in the end region of the bowling lane or in one of the gutters. The pinfall detection device comprises a light sensitive sensor array which detects any radiation reflected by a pin lying in the end region of the bowling lane. For this purpose, the lower foot portion of each pin may be provided with a black ring. Thus, the reflection characteristics of the pin change in dependence whether the pin is standing upright or has fallen, because in the first case the weak reflection of the black ring is detected by the pinfall detection apparatus, while in the second case the strong reflection of the white central portion of the pin is detected.

REFERENCES:
patent: 3847394 (1974-11-01), Logemann et al.
patent: 4726587 (1988-02-01), Fitch
patent: 4827412 (1989-05-01), Form
patent: 5649869 (1997-07-01), Infantino et al.
patent: 5683080 (1997-11-01), Vaioli et al.

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