US2234321A - Moving picture film reel - Google Patents

Description

Marsh 11, 1941. w SEARJEANT 2,234,321

MOVING PICTURE FILM REEL Filed Feb. 8, 1938 INVENTOR Mum/a H. 55/; RJEA N7- BY AT RNEY Patented Mar. 11, 1941 UNITED STATES PATENT OFFICE MOVING PICTURE FILM REEL tion of New York Application February 8, 1938, Serial No. 189,367

7 Claims.

This invention relates to moving picture film reel constructions and has for one of its objects to provide a novel hub construction for such a reel.

Another object of this invention is to provide the hub of a moving picture film reel with novel fastening means for fastening the hub to the sides of the reel.

A further object of this invention is to provide the hub of the reel with novel reinforcing means.

All these and other objects and attendant advantages will become more readily apparent from the detailed description of the invention which follows, reference being had to the accompanying drawing in which Figure l is a side elevation of a moving picture film reel embodying my invention.

Figure 2 is an edge elevation thereof.

Figure 3 is a vertical sectional view of the hub of the reel, the section being taken on the line 3;r3;r of Figure 2.

Figure 4 is a vertical sectional View of the hub of the reel, the section being taken on the line Sn-4:10 of Figure 3.

Figure 5 is a sectional view of the hub portion of the reel taken on the line 5:12-53: of Figure 1.

Figure 6 is an end elevation of the pro-formed blank from which the hub of the reel is made up.

Figure '7 is a top plan view of the hub blank illustrated in Figure 6.

Figure 8 is a detail perspective view of the bearing sleeve or core of the reel.

In the several figures of the drawing like reference numerals indicate like parts.

Moving picture film reels, especially the larger sizes, when made up of sheet metal, have a tendency to bend, get out of shape or their sides become loosened on the hub due to the weakness in the construction of the hub and its fastening means to the sides of the reel. Ihese weak points a the construction of sheet metal moving picture reels have been successfully overcome in my present invention by the use of a novel form of sheet metal hub which embodies novel fastening means for its anchorage to the sides and its support thereon.

As illustrated in the several figures of the drawing the sides 2, 2 of the reel are provided with acircurnferentially extending reinforcing bead 3, suitable radially extending reinforcing embossings 4, 4 and circularly arranged openings 5, 5. The center of each side is provided with a small circular depression 6 which is perforated in the center with a substantially square hole. A square bearing sleeve I extends thru the holes of both of the sides of the reel and lugs 8, 8 on the outer ends of the sleeve are bent back against the sides to hold the sleeve anchored in the square openings of the reel and provide the reel with an elongated bearing on which it is adapted to be supported by a spindle. One side of the bearing sleeve, as well as one side of each of the square center holes in the sides 2, 2 of the reel, are slotted in such a manner that all of the slots are in line with each other and provide a keyway for the engagement of a key carried by the supporting or driving spindle for driving purposes.

In order to strengthen the sides of the reel around the square holes thereth-ru and prevent the bearing sleeve from working loose in these holes, a reinforcing bar 9 is anchored to the inside of each of the sides of the reel. This reinforcing bar extends diagonally across the center portion of the sides as illustrated in Figure 3 and is provided with a square hole with a keyway on one side so as to match the holes in the sides of the reel. The added thickness of the reinforcing bar thus provides each side of the reel with a suificient bearing surface around the square openings so that the bearing sleeve anchored therein will not work loose therein when the driving torque is applied by a driving spindle inserted into the bearing sleeve.

For the purpose of anchoring the outer ends of each of the reinforcing bars to the side of the reel, each of the bars is provided at both ends with a circular hole In and the sides of the reel are provided with the openings ll, ll which have their edges flared inwardly to form a short anchoring sleeve surrounding the opening on the inside of the reel. These anchoring sleeves project thru the holes in the anchoring bars so that the outer ends of the sleeves can be expanded and their edges rolled over to firmly clamp the bars against the sides of the reel as illustrated in Figures 3 and 4. The holes H, it may also be used as finger holes for the insertion of two fingers when handling the reel.

The reel is provided with a hub of predetermined diameter which surrounds the bearing sleeve to suitably support and hold the inner end of the roll of film on the reel. This hub is made up of sheet metal in either one or more sections. In the form illustrated in Figures 6 and 7 the hub is made up of a single strap l2 which is shaped and formed as illustrated in these figures 'so as to have the tubular cross members or ribs I3, l3 formed on one side thereof. The opposing sides l4, M of the outer ends of-these cross members extend beyond the edges of the metal strap and in conjunction with the lugs I5, l5 which project directly from the edges of the metal strap serve as anchoring lugs with which the metal hub is rigidly held between the sides of the reel as will hereinafter appear.

The sides of the reel are provided with suitable circular holes l6, [6 as well as the slots I1, I! and these holes and slots are arranged so that with the metal strap l2 formed into a cylinder,

, the projecting end portions l4, 14 of the tubular cross members or ribs l3 and the lugs l5 register with the holes [6 and slots l1 respectively and project therethru. The ends of the tubular cross members and the lugs are bent or folded back against the outside of the reelto draw the sides thereof against the edges of the metal strap to properly space the sides of the reel and hold the hub securely in place between them.

In the formation of the hub the lugs i5 extend from the edges tangentially thereto, whereas the outer ends I4 of the tubular cross member extend substantially radially thereto. Furthermore the lugs l5, when bent against the sides of the reel, extend outwardly of the hub, whereas the ends I 4 of the cross members or ribs extend inwardly of the hub on the outside of the reel. In this way the inwardly extending anchoring ends M of the tubular cross members or ribs, when folded against the side of the reel, provide for the hub a firm anchorage which cannot be loosened in the handling of the reel. This is due to the fact that the anchoring ends M are located within the hub area and not outside thereof and extend substantially radially to the hub so that a bending of the sides of the reel outwardly of the hub. cannot pry these ends loose.

Anchoring lugs such as are provided by the anchoring ends I4 also make possible the use of a greater number of large or longer lugs for a given perimeter of the hub and the ends of the tubular cross members or ribs which carry the lugs increase the edge surface of the hub against which the sides of the reel are drawn. This further increases the rigidity of the reel and prevents its sides from working loose from the hub.

While I have shown the hub made up of a single strap as illustrated in Figures 6 and 7, this strap may be divided into sections by dividing the strap, as for example, along the line A-A so that the hub may be formed in two sections.

For the purpose of holding the end of a film on the hub when it is to be wound up on the reel, the end is inserted into any of the transverse slits 18 provided in forming the tubular cross members or ribs l3. In this way the end of the film is located and held in a hollow cross. member or rib during the winding and unwinding of the film on the hub of the reel. For this reason no separate holding means or slot need be provided on the hub in order to hold the end of the film on the hub when the film is being wound up thereon.

As will be seen from an inspection of Figures 3, 4 and 8 the bearing sleeve or core 1 is provided on three sides with the lugs l8, l8 which are struck up so as to form shoulders which holdthe reinforcing bars 9, 9 in place on the sleeve in their proper position in contact with the sides of the reel while the lugs 8, 8 are folded over the outside of the reel to lock the sleeve in the reel. The bearing sleeve or core 1 is formed of sheet metal as illustrated in Figure 8 and each end of one side is cut out to provide the keyways l9, l9 therein. The middle portion of the sleeve, which is not cut away, keeps the sleeve expanded.

I claim:

1. In a reel construction, the combination of a pair of sides having a plurality of holes therethru, a cylindrical sheet metal hub between said sides, tubular ribs on the inside of said hub adjacent the inner surface thereof and extending axially of the hub and beyond the ends thereof; and thru the holes in said sides of the reel with the ends thereof bent over the outer face of the sides of the reel.

2. In a reel construction, the combination of a pair of sides having a plurality of holes therethru, a cylindrical sheet metal hub between said sides, tubular ribs formed in the sheet metal hub adjacent the inner surface thereof and axially thereto, and anchoring lugs carried by and forming extensions of said tubular ribs for engagement thru the holes in the sides of the reel and for fastening against the outer face of the sides of the reel.

3. In a reel construction, the combination of a pair of sides having a plurality of holes therethru, a sheet metal hub between said sides, tu-

bular ribs formed in the hub adjacent the inner wall with the opposing longitudinal edges of the ribs arranged so as to provide slits in the periphery of the hub and extensions on said tubular ribs for engagement thru said holes and for fastening against the face of the sides of the reel.

4. In a reel construction, the combination of a pair of sides, a bearing sleeve mounted centrally of said reel, said bearing sleeve comprising a sheet metal tube of substantially rectangular cross section formed of a single sheet of metal with the free longitudinal edges abutting each other intermediate one of the sides of the sleeve, keyways extending inwardly of the ends in the side of said sleeve formed by the abutting longitudinal edges thereof and held expanded by the middle portion of the abutting longitudinal edges of the sleeve, shoulder lugs struck up from the sides of the sleeve for the sides of the reel to rest thereagainst and lugs forming extensions of the sides of the sleeve adapted to be folded over the outside of the sides of the reel to hold the sides of the reel on the sleeve between the extension lugs and the shoulder lugs thereof,

5. In a moving picture reel construction the combination of a pair of sides having holes therein, a cylindrical sheet metal hub, tubular ribs formed integrally with and on the inside of said hub; and lugs forming extensions at the ends of each of said tubular ribs and extending through the holes in said sides of the reel so as to be arranged substantially radially in the sides of the reel and bent over the sides of the reel in opposite directions away from each other.

6. In a moving picture reel construction the combination of a pair of sides having holes therein, a cylindrical sheet metal hub, tubular ribs formed integrally with and on the inside of said hub; and a partially cylindrical lug at the end of each of said tubular ribs and extending through the holes in the sides of the reel and bent over the sides of the reel in the direction of rotation of the reel.

'7. In a reel construction, the combination of a pair of sides, each having a pair of holes therethru at diametrically opposite points of the cen-- ter thereof, a reinforcing bar extending diametrically across the center of each of the sides of the reel on the inside thereof, each of said bars having a pair of holes therethru, the edges of the holes in the sides being turned inward th u the holes in the reinforcing bars and back upon the edges of the latter to clamp the bars in place on said sides, a bearing sleeve mounted between said sides and supported by said reinforcing bars centrally of the sides of the reel, means provided on said bearing sleeve for holding said sides with the reinforcing bars spacedly fastened together, a sheet metal hub between said sides of the reel and encircling said reinforcing bars, tubular ribs 5

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