US3738655A

US3738655A - Magnetic pool ball

Info

Publication number: US3738655A
Application number: US00064272A
Authority: US
Inventors: E Feddick; G Wassman
Original assignee: Victor Comptometer Corp
Current assignee: Kidde Inc
Priority date: 1962-07-05
Filing date: 1970-08-17
Publication date: 1973-06-12
Anticipated expiration: 1990-06-12

Abstract

A pool ball comprising a spherical body of non-magnetic material and circumferentially extending loops of magnetic material embedded in the body inwardly of the outer surface of the nonmagnetic material but outwardly of a portion of the non-magnetic material, the body having its center of mass located at its geometric center.

Description

United States Patent 1 Feddick et a1.

[11] 3,738,655 June 12, 1973 MAGNETIC POOL BALL [75] Inventors: Earl W. Feddick; Gustane-Wassman,

both of Bay City, Mich.

[73] Assignee: Victor Comptometer Corporation,

Chicago, 111.

[22] Filed: Aug. 17, 1970 [21] Appl. No.: 64,272

Related US. Application Data [62] Division of Ser. No. 696,344, Jan. 8, 1968, Pat. No. 3,547,439, which is a division of Ser No. 207,694, July 5, 1962, Pat. No. 3,362,910.

[52] US. Cl 273/59 A, 273/1 M [51] Int. Cl A6311 37/00 Field of Search 273/59, 220, 228,

[56] References Cited UNITED STATES PATENTS 113,272 4/1871 Dertz et al. 273/59 R 1,339,992 5/1920 Wais 273/59 R 700,658 5/1902 Kempshallm. 273/59 R 2,277,057 3/1942 Bach 273/58 A X 2,939,709 6/1960 Verveer 273/119 A X 705,359 7/1902 Kempshall 273/234 X 1,221,181 4/1917 Hooper 273/87 B FOREIGN PATENTS OR APPLICATIONS 7,902 1910 Great Britain 273/220 Primary Examiner-George J. Marlo Attorney-Learman, Learman & McCulloch [5 7] ABSTRACT A pool ball comprising a spherical body of nonmagnetic material and circumferentially extending loops of magnetic material embedded in the body inwardly of the outer surface of the non-magnetic material but outwardly of a portion of the non-magnetic material, the body having its center of mass located at its geometric center. 7

1 Claim, 10 Drawing Figures PAIENIE JUN I 2 ma SIEHZIIS NVENTORJ eda Jsmann.

m mw PATENIED 3.738.655

SIEUSI3 'INVENTORJ 20? 0% 506112077. 57 m /aam WW flTTORNEYS MAGNETIC POOL BALL This application is a division of application Ser. No. 696,344, filed Jan. 8, 1968, now U.S. Pat. No. 3,547,439, which is a division of application Ser. No. 207,694 filed July 5, 1962 now US. Pat. No. 3,362,910, granted Jan. 9, 1968.

This invention relates to pool balls and tables, particularly tables equipped with a normally locked, coin actuated pool ball compartment into which the balls roll, by gravity, when played, and to methods and means for effecting magnetic separation of the unnumbered cue ball from the numbered object balls in the event the cue ball inadvertently is shot or rolls into one of the pockets during the progress of the game.

Most coin operated pool tables have distributor troughs leading from the individual pockets of the table to a normally locked object ball compartment which can be opened only-upon the depositing of a coin of the proper denomination. It frequently happens that the cue ball is shot or rolls into one of the pockets of the table and thus would be subjected to the same treatment as the other balls if provision were not made to prevent the cue ball from being delivered to the object ball compartment. This problem has been solved heretofore by so forming the cue ball that it has a slightly larger diameter that the object balls, i.e., there is a size differential between the cue ball and the object balls, so that when the cue ball is inadvertently shot or rolls into one of the table pockets it is incapable of entering the locked object ball compartment. Instead, the oversize ball bypasses the object ball compartment and is delivered to a cue ball compartment, thereby making it unnecessary to insert a coin in the mechanism to retrieve the cue ball prior to completion of the game.

Although an oversize cue ball permits its separation from the other balls, there are many objections to utilizing a cue ball that is larger than the remaining balls. One of the salient objects of the invention, therefore, is to provide means and methods applicable to coin operable pool games for enabling the cue ball to be made the same size as the object balls and still enable the cue ball to be separated automatically from the object balls.

Another object of the invention is to provide a cue ball having magnetic material forming a part of the ball.

With the above and other objects in view, the present invention consists in the combination and arrangement of parts, hereinafter more fully described, illustrated in the accompanying drawings, and more particularly pointed out in the appended claims, it being understood that changes may be made in the form, size, proportion and minor details of construction, without departing from the spirit, or sacrificing any of the advantages of the invention.

IN THE DRAWINGS FIG. 1 is a top plan view of a pool table constructed according to the invention with the playing surface of the table broken away to show the ball chutes and distributing trough, the broken lines showing a cue ball andobject balls;

FIG. 2 is an enlarged, fragmentary, longitudinal sectional view through the distributor trough and cue ball compartment taken on the line 22 of FIG. 1;

FIG. 3 is a sectional plan view taken on line 3-3 of FIG. 2;

FIG. 4 is a transverse, sectional view through the distributor, taken on the line 4-4 of FIG. 3;

FIG. 5 is an enlarged, elevational view of a cue ball formed according to one embodiment of the invention, with a part broken away to show the construction;

FIGS. 6-8 are views similar to FIG. 5, but illustrating other embodiments;

FIG. 9 is an enlarged, fragmentary perspective view of the magnet;

FIG. 10 is a view similar to FIG. 4, but illustrating a modification.

Apparatus constructed according to the invention comprises a complement of pool balls including a plurality of numbered object balls P and one unnumbered cue ball C, the balls being adapted for use with a substantially conventional pool table T. The table has underslung ball chutes 1 communicating with each pocket 2, each chute 1 terminating at a lower level, downwardly inclined trough 3 leading to a normally locked object ball compartment A into which the object balls P may roll by gravity. The trough 3 also leads to a cue ball compartment B into which the cue ball C may roll when the game is completed, or when it is inadvertently shot into a pocket during the progress of the game. The cue ball compartment is provided with an access opening H to permit the ball to be removed from the compartment B when desired.

The cue and object balls preferably are formed of phenolic resins of the type disclosed in US. Pat. Nos. 2,223,394 or 2,395,675, but any other suitable and conventional material having the desired characteristics, as hereinafter set forth, may be utilized.

As is best shown in FIGS. 2, 3 and 4, the trough 3 has a bottom wall or floor 4 having a width somewhat greater than the diameter of the balls. In advance of the cue ball compartment B, a portion of the floor 4 is removed to form an exit opening 5 beneath which is mounted a deflector plate 7 that is adapted to deflect a falling ball into a chamber 8 that communicates with the compartment A through an opening 9. Adjacent the opening 5 the floor 4 has a width such that any ball arriving at the opening will be diverted through the latter by gravity unless it is acted upon by an external force.

The cue ball C is formed to the same diameter as the object balls and follows the same path to the exit opening 5 whenever it is inadvertently shot or rolls into one of the pockets 2 of the'table. To eliminate the possibility of the cue balls rolling through. the exit opening v5 and following the path of travel of the object balls, one side wall 10 of the distributor trough is slotted as at 11 for substantially the full length of the opening 5 to accommodate an elongated magnet M of known construction, for a purpose presently to be described.

The magnet M is adapted to attract and guide the cue ball past the exit opening 5, so that it bypasses the locked compartment A and continues to roll down the a The cue ball can be formed in various ways and,

when completed, preferably is of the same weightand diameteras the object balls P. Moreover, the magnetically attractive material must be so distributed that the center of mass of the ball coinsides with the geometric center of the ball so as to permit the ball to roll true when played,

In one embodiment, the resin forming the ball C is molded about a plurality of uniformly spaced apart, stainless steel strips 12 in the form of circular or semicircular loops. The molding process can be any one of a number of conventional embedding processes as long as each strip or loop is embedded in the body of the ball so that they all are completely covered by the resin material of which the ball is formed and as long as the strips are evenly spaced so that the center of mass of the ball is at the geometric center of the ball. Alternatively (FIG. 6), a hollow sphere 12a of metal may be embedded in the ball by a molding process and the sphere can be perforated as at 12b to allow the plastic resin to flow into the sphere to form a core within the sphere. An alternative method (FIG. 7) is to mold a ball with peripheral grooves 12c in its outer surface, the depth of the grooves being greater than the thickness of the strips 12. Thereafter the strips 12 may be inserted in the grooves and the grooves filled to the outer surface of the ball with the resin which subsequently may be cured to form a smooth exterior. A still further method (FIG. 8) is to substitute for the loops 12 segment shaped pieces of metal 12d similar to orange sections and either mold the ball around such sections, or insert them in a ball having grooves therein to accommodate them, and subsequently fill the grooves with resin and cure the latter to form a smooth surface.

In all of the foregoing embodiments, it is desirable that the metal in the ball extend as close as possible to the surface of the ball to assure adequate attraction of the ball by the magnet M. Accordingly, it is necessary that the resin used in forming the ball be capable of adhering to the metal and remaining adhered thereto. Moreover, the resin should be sufficiently tough to avoid cracking in the regions adjacent the metal.

If desired, the exposed face of the magnet M can be concave in cross section to provide for a greater area of contact with the ball. The strength of the attraction between the cue ball and the magnet should be sufficient to maintain the ball against the side wall 11 of the trough, but it should not be of such magnitude as to prevent the ball from rolling past the exit opening 5, thus assuring its reaching the cue ball compartment B.

In any of the described embodiments, the metal embedded in the cue ball C can be magnetized. In such an arrangement, the magnet M can be replaced by a strip of magnetically attractive material such as steel. It should be understood that the terms magnetic means in the claims refers interchangeably to magnet, magnetized material, or non-magnetized magnetizable material.

If it should be desired to repel, rather than attract the cue ball, the metal in the ball can be so arranged that its magnetic polarity is the same as the polarity of the magnet M. This construction would require mounting the magnet M on the trough wall that is opposite the wall 11, as is shown in FIG. 9.

In practice, the player first inserts a coin (not shown) in a coin slide lever 16 (FIG. 1) and pushes the lever inwardly to actuate mechanism (not shown) to unlock the ball compartment A. The complement of object balls and the cue ball then may be assembled on the playing surface of the table and a game begun. Any object ball P that rolls into a pocket 2 will be delivered to the locked compartment A, from which it cannot be retrieved until another coin is deposited. Should the cue ball C be shot into a pocket, however, it will be forcibly attracted by the magnet M so as to prevent its being diverted to the locked compartment A. Instead, the cue ball will bypass the exit opening 5 and will be delivered to the compartment B where it may be retrieved and put in play.

The disclosed apparatus constitute presently preferred embodiments of the invention, but this disclosure is intended to be illustrative rather than definitive of the invention. The invention is defined in the claims.

What is claimed is:

1. A magnetically attractable pool cue ball adapted for use with other pool balls in playing a pool game and having a diameter corresponding to the diameter of the other pool balls, said cue ball comprising a spherical body having a smooth, continuous outer surface, said body being composed of molded, non-magnetic resinous material within which is embedded magnetically attractable material, said magnetically attractable material comprising a spherical cage composed of a plurality of uniform, curvilinear metal loops uniformly spaced from one another circumferentially of said cage and extending along lines which intersect at common polar locations of said cage, said cage being concentric with the geometric center of said body and being of such diameter relative to the diameter of said body that said cage occupies a position radially remote from the center of said body and adjacent but wholly inwardly of the outer surface of said body and at a uniform depth from the outer surface of said body, said non-magnetic resinous material being identical throughout said body and being adhered to and completely enveloping said loops.