Golf game and practice apparatus

• US 4,177,994 A
• Filed: 12/20/1976
• Issued: 12/11/1979
• Est. Priority Date: 12/20/1976
• Status: Expired due to Term

• Current Assignee: Spin-Alizer Corporation
• Original Assignee: University of Iowa Research Foundation
• Inventors: Lindquist, Everet F.
• Primary Examiner(s): Marlo, George J.
• Application Number:
  US05/752,022
• Time in Patent Office: 1,086 Days
• Field of Search: 273/181 E, 273/185 R, 273/185 A, 273/185 B, 273/184 R, 273/176 FA
• US Class Current: 473/156
• CPC Class Codes: A63B 2024/0034 during flight
• CPC Class Codes: A63B 2024/0037 on a target surface or at impact on the ground
• CPC Class Codes: A63B 2220/30 Speed
• CPC Class Codes: A63B 2220/801 Contact switches
• CPC Class Codes: A63B 2220/805 Optical or opto-electronic sensors
• CPC Class Codes: A63B 24/0021 Tracking a path or terminating locations
• CPC Class Codes: A63B 69/3658 Means associated with the ball for indicating or measuring, e.g. speed, direction

Abstract

An apparatus for simulating the game of golf and aiding golfers in improving their game by providing an indoor practice facility. The apparatus employs a unique penetrable grid consisting of parallel spaced-apart conductors in one plane positioned ahead of a second group of conductors in a second plane parallel to the first plane. The conductors are connected in an electrical circuit, and when the grid is struck by a golf ball, a conductor in one group engages a conductor in the other group thereby producing a signal that is used to provide an accurate measurement of the direction and velocity of the golf shot. The electrical circuit includes diodes and electrical connections to a units lead and a tens lead. Each pair of units and ten leads is connected to the detecting means. The detecting means includes latches to detect the contact of the first ones of the conductors in the first and second planes. A screen is positioned behind the penetrable grid in order to stop the flight of driven golf balls, and provide a surface on which images of a golf course may be projected. Using this apparatus, the lie of the golf ball resulting from that shot can be predicted and plotted on a map of the golf course. The basic procedure employed using the apparatus can be repeated to simulate play over an entire golf course.

Claims

1. An apparatus for predicating the flight and measuring the direction of a golf ball or the like hit by a player from an initial position in a player station by measuring the critical dimensions of the initial segment of the trajectory, said apparatus comprising a penetrable grid through which said ball travels, said grid having a first group of a plurality of spaced-apart electrical conducting wires positioned in the same first plane, a first supporting structure to which said wires are affixed, a second group of a plurality of spaced-apart electrical conducting wires positioned on said grid in the same second plane, a second supporting structure to which said wires are affixed, said first and second supporting structures being relatively positioned so that one of said planes is located closer to the player station than the other of said planes with the wires in said first plane extending transversely to the wires in said second plane, said first and second planes being spaced-apart so that the wires in one plane do not normally contact the wires in the other plane, means for securing the wires in each of said planes to their respective supporting structures so as to provide for limited movement of the wires without permanent deformation thereof within the range of limited movement, said limited movement being sufficient to permit the wires in each plane to separate and allow a ball to pass through the grid, the spacing of said first and second planes being within the range of said limited movement of said wires to provide for contact of a wire in the plane closer to the player station with a wire in the other plane when struck by a ball, and electrical detecting means to detect the point of contact of the first pair of wires one in each of said planes when a ball hit from said player station passes through said grid.

2. In the apparatus of claim 1, a penetrable grid in which the wires in each of said first and second planes are parallel to one another and equally spaced apart, the spacing of said wires in each of said planes being less than the diameter of the ball the flight of which is being determined.

3. In the apparatus of claim 2, a penetrable grid in which the wires in said first plane extend vertically and the wires in said second plane extend horizontally.

4. In the apparatus of claim 3, a penetrable grid in which said first and second planes are parallel to each other and are spaced apart less than an inch.

5. In the apparatus of claim 4, a penetrable grid in which the first plane containing the vertically extending wires is located closer to the player station than the second plane containing the horizontally extending wires.

6. In the apparatus of claim 1, a screen, and means by which a visual image can be projected on said screen, said screen also providing a backstop to absorb the impact of a moving ball, said wire grid being located closer to the player station than said screen and backstop.

7. In the apparatus of claim 1, an electrical circuit including sensing means located in said player station to measure certain dimensions of the initial part of the flight of the ball when struck by a player, said sensing means being combined with said detecting means to provide for measurement of the time required for the ball to reach said grid and to determine the point of penetration of the grid.

8. In the apparatus of claim 7 in which said sensing means includes a light source providing a beam of light and a light sensitive means in alignment with said light beam, said beam extending across the area in which the ball is placed prior to being struck by the player.

9. In the apparatus of claim 1, an electrical circuit including diodes, electrical leads connected through said diodes to each of the wires in said first group and to each of the wires in said second group, each of said wires being connected through said diodes to a units lead and to a tens lead, each pair of units and tens leads being connected in said circuit with said detecting means, said detecting means including latches to detect the contact of the first ones of the wires in said first and second planes.

10. In the apparatus of claim 9, means in said circuit for visually displaying the identity of the first ones of the wires to come into contact when struck by a ball and the time required for the ball to reach said grid.