US2322081A - Swivel mount for striking bags - Google Patents

Description

June 15, 1943. A WRI HT 2,322,081

SWIVEL MOUNT FOR STRIKING BAGS Filed March 16, 1942 Patented June 15, 1943 UNITED srres PATENT OFFICE SWIVEL MOUNT FOR STRIKING BAGS Alvin C. Wright, Grand Rapids, Mich.

Application March 16, 1942, Serial No. 434,816

3 Claims.

The present invention relates to swivel mounts for striking bags.

The primary objects of the invention are to provide a swivel mount for striking bags which is so designed that it greatly prolongs the life of the rope by means of which the striking bag is suspended, thus eliminating the necessity of frequent demounting of the bag and replacement of the rope; to provide such a swivel mount for striking bags which is smooth and quiet in action; to provide such a swivel mount comprising a ball and socket joint, and means in the ball whereby the striking bag rope is securely gripped but may readily be removed and a new rope quickly substituted when replacement becomes necessary; to provide such a ball and socket swivel mount in which adjustment may be made of the frictional engagement between the ball and socket to thus adjust as desired the freedom of movement of the striking bag, said adjusting means serving further to compensate for wear between the ball and the socket, and insuring a snug fit between the ball and the socket so as to eliminate jumping of the bag and consequent interference with the rhythm of the bags swing; and to provide such a swivel mount which is emcient in use, economical in manufacture, and attractive in appearance.

An illustrative embodiment of the invention is shown in the accompanying drawing, wherein:

Figure 1 is a front elevational view of a striking bag secured by means of the swivel mount of the present invention to a rebound board affixed to a ceiling, the bag being shown in its uppermost swung position in dotted lines;

Figure 2 is an enlarged sectional view thereof taken on line 2-2 of Figure 1 and showing the swivel mount in bottom plan view;

Figure 3 is a sectional view of the swivel mount taken on line 33 of Figure 2;

Figure 4 is a sectional view of the same taken on line 4-4 of Figure 3;

Figure 5 is a perspective view of certain parts of the swivel mount prior to their assembly; and

Figure 6 is an enlarged fragmentary sectional view taken on line 6-6 of Figure 3.

Referring now in detail to this drawing wherein like parts are designated by the same numerals in the several views, a conventional striking bag I having a rope 2 attached thereto is swingably suspended from the usual rebound board 3 attached by any suitable means to a horizontal surface or ceiling 4, by means of the swivel mount of the present invention which comprises an annular metal base 5 having a flange 6 secured to the rebound board 3 as by means of wood screws 1 passing through apertures 8 in said flange and into the rebound board. The base 5 has a downwardly extending externally threaded shank 9 whose bottom surface If] is downwardly divergent. The base 5 may have a hollow center II as shown, thus conserving metal.

An internally threaded collar I2 is detachably mounted on the lower end of the shank 9, said collar [2 having a downwardly convergent spherically formed bearing surface l3 in its lower end which forms with the downwardly divergent bottom surface I0 of the shank 9 a socket generally designated I4. The bottom surface l5 of the collar I2 is downwardly divergent for a purpose hereinafter described. A lock nut I6 is threaded on the shank 9 above the collar 12 for locking the collar l2 in adjusted position on the shank 9, and the collar I2 and lock nut iii are provided with external radial bores ll, I8 respectively into which may be inserted a suitable tool for tightening these parts. 5

p A ball I9 is disposed in the socket i l and is provided with an upwardly extending annular cavity 20 therein adapted to receive the upper end of the rope 2 on the striking bag 1. Means are provided for firmly but detachably securing the rope 2 in the cavity 20 of the ball l9, which means comprise a pair of semi-cylindrical complementary internally threaded clamping members 2|, 22 adapted to grip the rope 2 therebetween and to snugly fit within the annular cavity 20 in the ball 19.

A pair of set screws 23, 24 are diametrically oppositely threaded in the ball I9, and these screws have hexagonal openings 25, 26 respectively in their outer ends for the reception of a suitable wrench by means of which the screws may be tightened into engagement with the complementary clamping members 2!, 22, and the clamping members are thus firmly but detachably secured within the cavity 20 with the rope 2 securely gripped therebetween. The outer end surfaces of the set screws 23, 24 are spherically formed to conform to the spherical contour of the ball l9 when these parts are assembled.

In assembling the swivel mount, the rope 2 attached to the striking bag I is first passed through the collar [2 which at this phase is demounted from the shank 9 of the base 5. The rope 2 is then manually pressed between the clamping members 2!, 22 which are next inserted into the cavity 20 in the ball I9, whereupon the set screws 23, 24 are tightened down, all as suggested in Figure 5. The collar I2 is then turned onto the shank 9'of the base 5 until the desired freedom of movement of the ball [9 within the socket I4 is attained, and the lock nut I6 is then turned down against the collar 12 to lock these parts in assembly.

It will readily be seen that as wear occurs between the ball and the socket, the collar I2 may be turned slightly farther onto the shank 9 when assembling the mount, thus compensating for the wear, and that any desired degree of freedom of movement between the ball and the socket may be attained. Preferably the parts are so-adjusted in position that the ball has a maximum of freedom of movement but there is no play of the ball within the socket, thus eliminating jumping of the striking bag and consequent interference with the bags rhythm and with the timing of the striker.

The downwardly divergent bottom surface [5 of the collar I2- is preferably approximately '75 degrees from the perpendicular and the outer and inner edges of this surface are preferably slightly rounded as indicated at 21, 28 respectively in Figure 6. This formation provides a smooth surface for the rope 2 to butt against when the bag reaches the uppermost phase of its swing, and the surface is substantially in line with the rope during this phase. Thus very little wear is inflicted on the rope, and the frequent replacement of the rope which was found necessary in th use of former types of swivel mounts which virtually cut" the rope, has been elimi nated.

While but. one speicific embodiment of the invention has been herein shown and described, it will be understood that numerous details of construction of that particular embodiment of the invention may be altered or omitted without departing from the spirit of the invention as the same is defined by the following claims.

I claim:

1. In a device of the class described, a base adapted for attachment to a horizontal surface and having a downwardly extending shank, a collar detachably mounted on the lower end of said shank and having a bearing surface in its lower end forming with the lower end of the shank a socket, a ball disposed in the socket and provided with an upwardly extending cavity therein adapted to receive the end of a rope, and means for detachably securing said rope within said cavity comprising complementary internally threaded clamping members adapted to grip said rope therebetween and to snugly fit within said cavity.

2. In a device of the class described, a base adapted for attachment to a horizontal surface and having a downwardly extending shank, a collar detachably mounted on the lower end of said shank and having a bearing surface on its lower end forming with the lower end of the shank a socket, a ball disposed in the socket and provided with an upwardly extending cavity therein adapted to receive the end of a rope, and means for detachably securing said rope within said cavity comprising complementary internally threadedclamping members adapted to grip said rope therebetween and to snugly fit within said cavity and a pair of set screws diametrically oppositely threaded in the ball and adapted to grip said clamping members therebetween.

3. In a device of the class described, a base adapted for attachment to a horizontal surface and having a downwardly extending externally threaded shank with a downwardly divergent bottom surface, an internally threaded collar detachably mounted on the lower end of said shank and having a downwardly convergent bearing surface in its lower end forming with the downwardly divergent bottom surface of the shank a socket and the bottom surface of the collar being downwardly divergent, a lock nut threaded on said shank above the collar, a ball disposed in the socket and provided with an upwardly extending cavity therein adapted to receive the end of a rope, and means for detachably securing said rope within said cavity comprising complementary internally threaded clamping members adapted to grip said rope therebetween and to snugly fit within said cavity-and a pair of set screws diametrically oppositely threaded in the ball andadapted to grip said clamping members therebetween.

ALVIN C. WRIGHT.

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