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US3837655A Expired / Lapsed US ⏱️ 0.0 years remaining

Apparatus for detecting spin of golf ball in indoor golf playing system

Assignee: Individual
•
Filing: 1973-03-13
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Granted: 1974-09-24
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Expires: 1993-03-13
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Abstract

Abstract In an indoor golf playing system, it is very advantageous if a golfer can determine the amount of side spin, i.e., slice or hook imparted to the ball. The ball is placed at a known point which is part of the indoor system and is hit into an impact surface such as a wall or screen which displays a picture of an appropriate portion of a golf course as it is seen by a golfer. A row of detectors is positioned in front of the impact surface and, as the golf ball is hit toward the surface and crosses the row of detectors, it actuates one or more of the detectors to produce an output. In this manner, the path of the ball travelling towards the surface is detected. The ball, upon hitting the surface, rebounds back toward the golfer and is again detected by one or more of the detectors as it passes back through the row of detectors. The angle at which the ball rebounds from the surface is a function of the side spin imparted to the ball by the golfer. Therefore, by detecting the point at which the ball crosses the row of detectors as it travels toward the surface and comparing this point to the point at which the ball travels through the row of detectors as it rebounds from the surface, the amount of side spin can readily be determined. In the event the golf ball is to be hit from points of origin that may not be determined, a second row of detectors may be positioned between the first row of detectors and the points of origin.

Inventors

  • 👤 A Angelos

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-27 13:48
CPC Classifications
A; A63; A63B; A63B24/00; A63B24/0021; A63B63/00; G; G01; G01P; G01P3/00; A63B2024/0037; A63B2024/0043; A63B69/00; A63B69/0097

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 133 words
Apparatus for detecting the amount of spin imparted to a ball when hit in free flight from a point of origin, said apparatus comprising: an impact surface positioned in the path of travel of the ball for rebounding the ball therefrom, detector means positioned between said point of origin and said impact surface for detecting the location of a first point at which the ball passes said detector means as it is travelling in flight toward said surface, and for detecting the location of a second point at which the ball rebounding in flight from said impact surface passes said detector means, without interfering with the flight of the ball, and means responsive to the detection of said first and said second points for determining the amount of spin imparted to the ball.
Claim 2
Dependent Claim 133 words
Apparatus for detecting the amount of spin imparted to a ball when hit in free flight from a point of origin, said apparatus comprising: an impact surface positioned in the path of travel of the ball for rebounding the ball therefrom, detector means positioned between said point of origin and said impact surface for detecting the location of a first point at which the ball passes said detector means as it is travelling in flight toward said surface, and for detecting the location of a second point at which the ball rebounding in flight from said impact surface passes said detector means, without interfering with the flight of the ball, and means responsive to the detection of said first and said second points for determining the amount of spin imparted to the ball.
Claim 3
Dependent Claim 12 words
The apparatus of claim 1, wherein said impact surface is substantially planar.
Claim 4
Dependent Claim 12 words
The apparatus of claim 1, wherein said impact surface is a screen.
Claim 5
Dependent Claim 29 words
The apparatus of claim 1, wherein said detector means and said last-mentioned means are so constructed and arranged to determine the amount of side spin imparted to the ball.
Claim 6
Dependent Claim 27 words
The apparatus of claim 1, wherein said last-mentioned means comprises indicator means connected to said detector means for indicating the amount of spin imparted to the ball.
Claim 7
Dependent Claim 18 words
The apparatus of claim 1 wherein said detector means comprises a plurality of sensors arranged in a row.
Claim 8
Dependent Claim 20 words
The apparatus of claim 6 wherein said sensors comprise photo detectors, and means are provided to illuminate said photo detectors.
Claim 9
Dependent Claim 120 words
The apparatus of claim 6 wherein said means responsive to the detection of said first and second points comprises: a. resistance means, b. a plurality of switch means interconnected with said resistance means, each of said switch means corresponding to one of said plurality of sensors, whereby detection of the ball by one of said sensors operates said switch means to thereby change the resistance of said resistance means, c. a voltage source connected to said resistance means, and d. output means for detecting the voltage across said resistance means which varies in accordance with the variation of the resistance of said resistance means, said output means producing a signal indicative of the amount of spin imparted to the ball.
Claim 10
Dependent Claim 37 words
The apparatus of claim 8 wherein said resistance means and said plurality of switch means are interconnected to form a variable voltage divider having a configuration which changes in accordance with the operation of said switch means.
Claim 11
Dependent Claim 47 words
The apparatus of claim 8 wherein said output means includes storage means for storing a voltage corresponding to said first point and for storing a voltage corresponding to said second point, and means for comparing said stored voltages and for producing an output indicative of the comparison.

References Cited (Backward Citations)

US2784000A Cited
US2783999A Cited
US3072410A Cited
US3559996A Cited
US3452990A Cited
US3591184A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-09-23 1978-03-25 1978-09-24 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-09-23 1982-03-25 1982-09-24 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-09-23 1986-03-25 1986-09-24 $7700.00 Window Closed / Lapsed

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