Apparatus for estimating the range of a golf course flagstick in terms of a number of paces which is common to all users. An opaque body adapted to be held in the hand is so shaped that its profile has two parallel ridges which face in the same direction, are separated by 47/64 inch, and lie on the same side of a perpendicular line along which they terminate. In use, the apparatus is held at arm's length so that the ridges are horizontal and the lower ridge is aligned with the lowermost visible extremity of the flagstick. In the special case when the upper ridge is found to be in line with the uppermost end of the flagstick the observer is 100 paces from the flagstick. In the general case the distance to the flagstick in relation to 100 of the user's paces then consists in the ratio of the observed distance between the ridges to the observed height of the flagstick. In one embodiment the ridges are comprised by the elevational profiles of a pair of spaced annular elements, the elements being separated by a stem of reduced diameter, a second stem element depending from one of the annular elements so that it may be easily grasped by a user. BACKGROUND OF THE INVENTION The present invention relates to geometrical instruments, and more particularly to a hand-held sighting device for estimating distance in terms of the actual paces of an observer. In day-to-day life an individual is repeatedly required to estimate distances. Most such estimations are of a casual nature, i.e., not requiring any particular degree of precision. Other estimates, such as those made while operating a motor vehicle, may be of crucial importance. However, at least in the example of the motor vehicle the continuous control afforded by the operator allows initial estimates to be compensated for and refined as the vehicle accelerates, is brought to a stop, or is maneuvered to avoid an obstacle. Other estimations, however, are made with respect to activities which cannot be continuously controlled. Such activities, such as throwing a ball, firing a gun, or shooting an arrow all depend upon the accuracy of the aim of the actor. In the case of firearms, considerable effort has gone into the design of sophisticated sighting mechanisms to allow a manually-held firearm to be "sighted in" on a distant object, while compensating for the ballistic trajectory of the missile to be fired. However, in other areas, particularly those involving sporting activities, less attention has been given to the construction of useful sighting devices. This is partially for the reason that the ability to estimate distances has probably been regarded as one of the inherent attributes of a successful athlete. The accurate estimate of long distances, however, requires considerable practice and consistent use which is not always possible for the casual participant. Further, it is well known that human distance estimation relies principally upon the stereoscopic effect arising from the very slight inward turning of the eyes necessary to train them upon an object. The degree of convergence of the lines of sight of the eyes is thus a function of the distance to the object of interest. The human brain learns at an early age to automatically recognize this effect, and to thus provide an automatic estimation of distance. It is apparent, however, that individuals who suffer from even minor visual handicaps may be seriously penalized in their ability to estimate distance although they may be quite proficient with regard to other aspects of a sport. Particularly in the game of golf it is necessary that one be able to judge long distances in order to determine how hard to strike a golf ball. Even in the case of an individual who has unusually good eyesight, the distances involved on a golf course are substantially greater than those normally involved in day-to-day distance estimations so that the occasional golfer can neither develop nor maintain an ability to judge such distances accurately. For the foregoing reasons, it is apparent that there is a need on the part of golf participants for an easily-manipulated device for estimating distances, particularly to the flagstick which marks the location of each successive hole in a round of golf. Some devices, such as optical range finders, are presently being marketed and perform satisfactorily. However these devices suffer from the dual disability of being expensive, and of representing distance in objective rather than subjective units. To be more explicit, such a range finder is intended for use by practically anyone and is designed to provide an indication of distance in fixed units such as feet, yards, meters, etc. Most individuals, however, simply have not had sufficient experience with fixed units of measure to have a subjective perception of the meaning of a distance expressed in such units. Many individuals, for instance, are able to estimate a distance of 100 yards only by associating it with the length of a football field since common experience allows these individuals to subjectively "know" the length of such a field. Particular individuals, depending upon their experience, may be able to estimate particular distances by relating them to the width of a lawn, the distance between a pair of familar objects, etc. Such estimations, however, can only be made for particular distances. The problem discussed above also arises in archery wherein a distance must be properly estimated in order to allow the archer to gauge the drop of an arrow in flight and compensate for it. To this end, a number of sighting devices have been developed for use in connection with the sport of archery. For instance, in U.S. Pat. No. 2,574,599 - Stieber a particular sighting device is shown which includes a series of notches or openings of varying widths. The widths of a properly-sized opening is aligned with a distant bulls-eye target which is of a known, standard diameter. The openings provided in the sights are graduated from top to bottom in decreasing order of width so that the further away the target, the higher the bow must be raised in order to align an appropriate opening with the bulls-eye. As a consequence of the raising of the bow, the attitude of the arrow is increased to compensate for its "drop" in flight which is in turn a function of distance from the target. The Stieber device is therefore actually a sighting compensation device rather than a distance estimation means. As shown in the Stieber patent, numbers indicating the absolute distance (in yards) from the target can be associated with various openings. This does not, however, allow a user to subjectively relate his activity to the distance involved, and moreover requires the use of either a plurality of openings or a single elongate opening of tapering width. In view of the foregoing, it will be understood that it would be advantageous to provide a device for estimating distances in terms of a known number of an individual's own paces, and to do so by means of a simple apparatus which is of a common size for all individuals. It is therefore an object of the present invention to provide an improved hand-held distance estimating device. It is another object of the present invention to provide means for determining the distance to an observed golf flagstick in terms of an observer's own paces. A still further object of the invention is to provide a simple and economical hand-held means for signifying when one is a fixed number of paces from a golf flagstick.
A golf cart mounted range finding apparatus is disclosed which accurately determines the distance between a golfer's ball and the flag stick on the putting surface. The golf cart mounted range finder comprises a clip with a face plate containing a baseline and yardage indicators which is mounted on the frame which supports the roof of the cart. The golf-cart-mounted range finder is positioned at the seated golfer's eye level. The range finder preferably is clipped where an imaginary horizontal line, at eye level of the seated golfer, passes through the golf cart frame supporting the roof. The clip is formed so that it can be slid up and down the frame to adjust for golfers of differing heights. After accurately determining the distance between the ball and the flag stick, the golfer can make the proper club selection.
A golf glove having a base line and a plurality of yardage lines. Each of the yardage lines is spaced a predetermined distance from the base line and each yardage line is associated with a predetermined distance. The base line is alignable with a bottom portion of a golf flag and the upper end of the golf flag is alignable with one of the yardage lines wherein distance associated with the yardage line aligned with the upper end of the golf flag indicates the estimated distance between the individual and the golf flag.
A radiation detector includes a flat housing 14 having a radiation sensor 16 at one end thereof and a bar graph display 18 at the other end thereof. The bar graph display provides an indication of radiation sensed from a limited surface area as the sensor is scanned across an extended surface area. The width of the housing 14 is such that, when the housing is held at about arm's length in the line of sight, the width defines a field of view which approximates the field of view of the radiation sensor.
