US2105530A - Moving picture film reel - Google Patents

Description

Jan. 18, 1938. J. M. GOLDBERG MOVING PICTURE FILM REEL Filed Dec. 4, 1936 Patented Jan. 18, 1938 UNITED STATES PATENT OFFICE 2,105,530 MOVING PICTURE FILM REEL Jacob M. Goldberg, Denver, 0010.

Application December 3 Claims.

This invention relates to improvements in reels and has reference in particular to a reel of the type employed for moving picture films.

In U. S. Letters Patent 2,051,334 granted to me on August 18, 1936, a film reel, constructed almost entirely from sheet metal formed by proper dies is shown. The present invention is in the nature of an improvement in the structure of the reel disclosed and claimed in the patent above indentifled.

It is the object of this invention to produce a film reel of substantial construction that can be formed almost entirely of sheet metal, drawn to the desired shape by dies.

Another object is to produce a' reel in which the hub, is positively held from rotation in the reel and whose construction is such that it will withstand the severest strains to which it may be subjected in normal operatiomwithoutbreaking loose from the reel or moving transversely there- A further object is to produce a construction in which the 'hub is provided with a radial flange or plate secured to it in such a way that neither relative, rotary. longitudinal or wobble movement can take place. I I

A still further object of this invention is to produce whose ends are engaged by the. edges of openings in hub portions of the side members, in such a way that it is braced against accidental displacement from its perpendicular position and in which the hub portions serve to prevent axial displacement of the hub.

The above and other objects that may become apparent as this description proceeds are attained by means of a construction and an arrangement of parts that will now be described in detail, and reference for this purpose will be had to the accompanying drawing in which the structure has been illustrated and in which:

Figure l is a side elevation of the reel, to a reduced scale;

Figure 2 is a section taken on line 2-2, Fig. l. and shows the center portion of the reel to a scale approximately twice that used in Fig. 1;

Figure 3 is a view, partly a plan and partly a section, taken on line 3-3., Fig. 2;

Figure 4 is a side elevation of the hub member andthe anchor plate that is attached to it;

Figure 5 is a fragmentary section showing a modified construction; and

Figure 6 shows a slight modification.

The reel comprises two side members 6 that are identical in size and shape. It is not essential a reel having a tubular elo'ngatedhub of the side members also.

4, 1936, Serial No. 114,171

that they shall be identical, but it is preferable because both can then be formed by a single die. The sides have offset circular, areas 1' that are connected to them by substantially cylindrical walls 8. From Fig. 2 it will be observed that the 5 center portions 1 are surrounded by beads or ridges 9 which abut when the reel is assembled, in the manner shown in Fig. 2. The beads are not, however, essential to: this invention.

The offset areas or portions 1 are provided 10 with a plurality-of holes l0, six' being shown.- These holes are formed in a circular row by-the dies and alternate holes are punched out full size, while the others are drawn so as to leave'a' cylindrical flange like that indicated by dotted lines in Fig. 2 and designated by numeral II. The tubular flanges are in the nature of tubular rivets andare employed to hold the parts in assembled relation, as-will hereinafter be pointed out. The ofiset portions 1 may each have an integral hub portion l3, provided with a central opening I4, surrounded by an inwardly directed flange l5, whose function will appear as the description proceeds. i

A metal plate 16 is positioned in the space betwen the opposed or adjacent surfaces of the offset portions land this plate is provided with openings of the proper size to receive the tubular flanges H, which in the assembled reel, are flanged outwardly in the manner common with tubular rivets andthe flanges I! serve to secure the sides and theplate l6 together as a unitary; assembly. The thickness of plate 16 is such that 1 it will fill the space between the offset portions when the heads 9 are in contact, as shown in Fig. 2. If the construction illustrated in Fig. 6 is employed, the thickness of the plate and the extent of the offset must be so calculated that the distance between the inner surfaces of the sides will be 'suflicient to receive the fllm. It is 40 evident that the plate l6, when the parts are assembled, will be positively held against rotation, and when the plate is made from steel, it will impart great strength and rigidity to the center portion of the reel.

Plate 16 is provided with a central opening of any suitable shape, either round, polygonal or oblong and the center of this opening must coincide with the center of the cylindrical walls 8 and I3. The center opening in plate IE is formed by dies in such a way as to leave a flange 18 that engages the outer surface of an elongated tubular hub memberlQ, whose size and shape is such that it will fit the opening with a snug driving fit. Since the flange I8 is formed by dies, the

employed, the ends aremade circular, as indicated at 20, whereby shoulders 2| are formed against which the flanges I5 rest; this serves to v and provided with flanges of parts 1.

Plate l6 serves as an anchor for the hub member l9 and positively 22 that are overlapped its axis perpendicular to the plane of plate 5, and this action is further assisted by the action of the hub portions l3 and Ba.

The sides 6 are provided with the usual openings 23 and have strengthening ribs 24.

The circular surfaces 1, 1' and 1" are oifset to an extent that is to one half to one-half the thickness of plate before described.

Reels constructed in accordance with this inventioncan be formed from sheet metal, with the exception of the hub member l9, and] it is also practical to form this from formed into a tube.

hub IS, the reel will cessfully resist forces as new is: t

1. A moving picture film reel comprising two by the edges Due to the fact that plate I6 is quite rigid and is firmly attached to the substantially identical circular side members, each having a central circular area, ofl'set from the of the plate, and means for eflfecting a non-rotatbetween the hub and plate.

JACOB M. GOLDBERG.

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