Test range for determining the aerodynamic characteristics of a ball in flight
First Claim
1. In a test range for determining the velocity of a golf ball in flight, said test range comprisinga frame defining an elongated path;
- launch means at one end of said frame for propelling a golf ball into and through said path;
at least one pair of spaced apart ballistic screens adjustably mounted on said frame longitudinally of said path, each said screen having means for forming a curtain of light transversely of said path for passage of a propelled golf ball therethrough and sensing means for emitting a pulse in response to passage of a propelled golf ball therethrough at high speed;
a calibration system mounted on said frame for establishing an exact position of said curtain of light of at least one of said screens relative to a point on said system; and
a ranging device adjacent said launch means for measuring the distance from said launch means to said point on said calibration system as a measure of the distance of said curtain of light of said one screen from said launch means.
4 Assignments
0 Petitions
Accused Products
Abstract
The test range is provided with a calibration system for calibrating the exact position of a light curtain formed by a ballistic screen. The calibration system uses a model ball which can be moved through a light screen at high speed in order to simulate the actual passage of a driven golf ball through the light screen. Positioning of the model golf ball at a point at which the golf ball just contacts the light screen serves to determine the exact location of the light screen. A laser ranging device is used to locate the calibration system relative to a launch point. Thus, the precise distance of the curtain of light from the launch point can be readily determined. The calibration system may also be used to determine if a ballistic screen is mounted in a true vertical plane.
103 Citations
20 Claims
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1. In a test range for determining the velocity of a golf ball in flight, said test range comprising
a frame defining an elongated path; -
launch means at one end of said frame for propelling a golf ball into and through said path; at least one pair of spaced apart ballistic screens adjustably mounted on said frame longitudinally of said path, each said screen having means for forming a curtain of light transversely of said path for passage of a propelled golf ball therethrough and sensing means for emitting a pulse in response to passage of a propelled golf ball therethrough at high speed; a calibration system mounted on said frame for establishing an exact position of said curtain of light of at least one of said screens relative to a point on said system; and a ranging device adjacent said launch means for measuring the distance from said launch means to said point on said calibration system as a measure of the distance of said curtain of light of said one screen from said launch means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. In a test range for determining the velocity of a ball in flight, said test range comprising
a frame defining an elongated path; -
launch means at one end of said frame for propelling a ball into and through said path; a plurality of vertically disposed ballistic screens adjustably mounted on said frame along said path, each ballistic screen having means for forming a curtain of light across said path for passage of a propelled ball therethrough and sensing means for emitting a pulse in response to passage of a propelled ball therethrough at high speed; a calibration system mounted on said frame for establishing an exact position of said curtain of light of each said ballistic screen relative to a point on said system; and a ranging device adjacent said launch means for measuring the distance from said launch means to said point on said calibration system as a measure of the distance of each curtain of light relative to said launch means. - View Dependent Claims (12, 13, 14, 15, 16)
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17. In a calibration system for establishing the position of a curtain of light of a ballistic screen, the combination comprising
a model ball; -
a shaft mounting said ball on one end thereof; and means for moving said shaft at high speed to propel said model ball through a curtain of light of a ballistic screen, said speed being sufficient to simulate the speed of a driven golf ball. - View Dependent Claims (18, 19, 20)
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Specification