Abstract: A practice device includes a base, a support tube, a post, an axle, a first ball rod, and a brake. The support tube extends upward from the base and has a support tube longitudinal axis. The post extends from the support tube and has a first portion and a second portion. The first portion is engaged with the support tube and the second portion includes a first arm. The axle is coupled to the first arm and has a rotation axis. The first ball rod is coupled to a first practice ball and extends between the first practice ball and the axle. The first ball rod is configured to rotate about the rotation axis of the axle and when the first ball rod rotates about the rotation axis of the axle, the first practice ball contacts the brake to slow rotation of the first ball rod.

Abstract: The present disclosure is directed to a novel golf ball stopping device. The golf ball stopping device includes an upper plate, set at a height so it slows or stops a golf ball which rolls under the plate. The underside of the plate includes a material and structure that provides resistance to the golf ball as it contacts the device. The plate may be supported by a center post or an extension arm located along the side of the plate. The center post and extension arm fit together with a base and are adjustable to the base so the plate can be positioned at a desired height. The base is designed to achieve the optimal friction on the golf ball and to provide stability to the device.

Abstract: The present disclosure is directed to a novel golf ball stopping device. The golf ball stopping device includes an upper plate, set at a height so it slows or stops a golf ball which rolls under the plate. The underside of the plate includes a material and structure that provides resistance to the golf ball as it contacts the device. The plate may be supported by a center post, so the golf ball can be aimed at the device from any direction and perform the same function. The center post fits together with a base, and is adjustable to the base so the plate can be positioned at a desired height. The base may be weighted to achieve the optimal friction on the golf ball and to provide stability to the device. The base may include a plurality of downward facing protrusions in order to grip the surface on which it is set and keep the device from spinning when a golf ball rolls under the outer edge of the device.

Abstract: A method of determining spin parameters of a spot ball, such as spin axis and rotation velocity of a golf ball. The spin axis is determined solely from the trajectory of the flying ball, and the rotational velocity is determined from a frequency analysis of a signal provided by a radar, which signal comprises spectrum traces positioned equidistantly in frequency, which frequency distance relates to the spin velocity.

Abstract: A ball trap comprises a carrier about which is spaced a number of suspended flaps so as to be positioned, in use, about the surface on which the ball travels and which are configured, so that when a—or the—flap is impacted by a ball, the flap is pushed aside to a position where, provided the impact force is sufficient, the ball passes underneath the flap and the flap falls back to its position of rest to prevent the ball from escaping; characterised by the feature that the flap region which the ball pushes aside on impact is spaced sufficiently, radially outward from the carrier that the same region can subsequently come down behind the ball and act as the escape-preventing means.

Abstract: This invention, the “Dual Purpose Golf Putting practice Device”, is characterized by two unique concepts which offers the player a practice device which better simulates the conditions of putting on the golf course green. One is a “vertical target hole”, constructed with “Flaps”, into which properly putt balls role, and disappears as into the hole on the golf course green. The other is the arrangement of “Flaps”in rows, which intercept balls according to their rolling force, enabling the player to practice the required force for putting from various distances. The device consists of a housing, having no bottom surface, a target cage, which provides a circular target as the hole, and row or rows of “Flaps”, which indicate the force of the rolling ball.

Abstract: A putting practice device having a first circular plate being generally parallel to and vertically offset from a second circular plate. The second circular plate is positionable upon a putting surface. The first circular plate and the second circular plate are spaced apart from each other by an intermediate circular member. This arrangement defines a golf ball receiving channel, which is capable of receiving and retaining a golf ball therein.