US2031635A

US2031635A - Film reel

Info

Publication number: US2031635A
Application number: US747393A
Authority: US
Inventors: Vry Herman A De
Original assignee: Individual
Current assignee: Individual
Priority date: 1934-10-08
Filing date: 1934-10-08
Publication date: 1936-02-25
Anticipated expiration: 1953-02-25

Description

Fb. 25, 1936. A, DE; VRY 2,031,635

FILM REEL Filed 0G17. 8, 19:54V 2 Sheets-Sheet -1 Trmen Fb. 25, 1936. A DE VRY 2,031,635

FILM REEL Filed Oct. 8, 1934 2 Sheets-Sheet 2 lfa/197222? Herman Ziel/y //D/MM 5 Patented Feb. 25, 1936 UNITED STATES PATENT OFFICE FILM REEL Herman A. de Vry, Chicago, Ill.

Application october s, 1934, serial No. 747,393 s claims. (01.1242-70) My invention relates to reels or spools particularly for use in motion picture apparatus for winding lm.

It is the principal purpose of this invention to g, provide a reel which cannot readily be distorted cr bent out of shape by rough handling.

My invention contemplates the provision of a reel which consists of a hub with two spaced guiding rims connected to the hub by means of 1g. spokes in such a. fashion that, if the rims are bent apart or pushed together, no tendency to stretch or permanently change the length of the spokes will be produced.

My invention contemplates also the provision 1;, of a reel of this characterwhich can be/readily knocked down for shipping andr assembled in compact form.'

' .My invention also contemplates the provision of a novel means for securing the film to the reel.

'I'he invention further contemplates the provision of a reel construction wherein resilient or spring material may be used to aid the reel in holding its original shape without the necessity of attempting to spot weld the spring material which often results in not only destroying the resiliency but in cracking or breaking the material.

My invention contemplates further the provision of a reel of this character wherein a single spring serves to provide resilient clamping means at several spaced points on the hub -for clamping the -illm to the reel hub.

Other and more specific objects and advantages of the invention will appear as the description proceeds in connection withv the accompanying drawings wherein the preferred form of the invention is shown. It is to be understood, however, that the description and drawingsare illustrative only and are not to vbe taken as limiting the invention except in so far as it is limited by the claims. v v

In the drawings- Fig. l is a side view of the reel;

Fig. 2 is a plan view of the reel; 3 is an enlarged'plan view of the hub with part of one side thereof broken away to show the interior construction; Y

Fig. 4 is a sectional view on the line 4-4 ofhow the nim may be attached to the hub by one 55, of the attaching means.

Referring now in detail to the drawings, the" reel is made up of a hub II), a pair of rims II and I2, and spokes I3 mounting the rims on the hub. The rims II and I2 and the spokes I3 are preferably vconstructed of at spring Wire having rounded edges such for example as clock spring material. The rims are curved in the plane of greatest width of the wire, and the spokes are secured to the rims for example by means of suitable rivets illustrated at I4. The spokes are fastened to the outer sides of the rims, and the rivets are smoothed oif on the inner surfaces of the rims to avoid any sharp edges that might engage the iilm and tear it. The spokes preferably so connect the hub and the rims as to permit of a limited movement lengthwise of the spokes between the rim and the hub so that, if the rims are bent together or spread apart so as to cause the spokes to bend, the spokes themselves will not be stretched or permanently pulled out of shape.

In order to accomplish this purpose, the hub is made up of the two plates I5 and I6 secured together by means of the posts such as Il and the screws I8 and I8 for each post. Each of the plates have struck up therefrom the webs such as I9 and 20 for each spoke to pass beneath, and, at the inner end of the spoke, there is provided a suitable stop 2I for each spoke.

From the above description, it will be seen that the spokes may move readily beneath the webs I9 and 20 toward and away from the stops 2|, the movement thus compensating for any bending of the rims without stretching or permanently distorting the spokes. If the bending is oi' such an extent as to permanently bend the spokes, the individual spokes may be straightened without causing a dish in the reel because of the sliding mounting oi.' the spokes on the hub.

The means provided for fastening the film to the hub consists of two separate instrumentalities one of which provides a spring grip for gripping the tllm and the other of which provides teeth for engaging in the perforations in the film. The two instrumentalities are provided by the pieces indicated by the

numerals

22 and 23.

The pieces 22 it will be noted are flat strips having the V-shaped portions 24 which extend in between the hub plates I5 and I6 around the posts I1. At opposite ends the members 22 are provided with the

portions

25 and 26 which are slightly wider than the space between the hub plates I5 andy IB and which rest on top of these plates between the opposite spokes. These members 22 have the

teeth

21 and 28 struck up therefrom, and, between these teeth within the V, portion of the members 22, the hub plates have the

projections

29 and 30 formed thereon. By an inspection of Fig. 6, it will be seen how the perforations in the film are Acaused to engage the teeth such as 21 and 28 by merely pressing the film down past the

projections

29 and 30 within the V-shaped part of the members 22. The

portions

25 and 26 of the members 22 have the proper curvature to flt flat upon the edges of the hub plates I5 and I6.

The members 23 are fiat strips bent into substantially T shape as shown in Fig. 3 with the free ends 3I and 32 curved somewhat more than the

ends

25 and 26 oi' the members 22 so that, where they overlap with the

ends

25 and 26, a line contact as distinguished from a surface or plane contact is made. I'his gives a better gripping of the film and always insures that a good grip will be had. The members 23 are .pressed `outwardly by means of the annular spring 33 which is threaded in suitable slots such as 34 and 35 cut in the doubled portions of the members 23. 'Ihe free ends of the spring 33 are Y shown at 36 and 31 in Fig. 3 as turned up on opposite sides of one oi' the members 23 so that, when any one of these members is pressed inwardly, the spring may adjust itself by relative sliding motion between the

ends

36 and 31; and, when the pressure is released, the spring will force the member 23 back into gripping position.

The device may be readily knocked down by removal of the screws I8 and I9 from the several posts I1 so that the rims and the hub plates and the spokes may be stacked flat one on top of the other, and the parts such as the posts and the screws together with the

members

22 and 23 may be placed between the spokes to thus form a very compact group for shipping several reels in knocked down condition.

From the above description, it is believed that the construction and advantages of this device will be readily apparent to those skilled in this art.

Having thus described one specific form of the invention, what I claim as new and desire to secure by Letters Patent is:

1. A nlm reel comprising a hub and a pair of rims spaced apart axially of the reel to receive the illm therebetween, and spokes mounting the rims von the hub, said spokes being movable endwise with respect to their mounting at one end thereof.

2. A illm reel comprising rims of at spring wire curved in the plane oi' their greatest width, a hub, and spokes of spring material connecting the rims to the hub.

3. A film reel comprising rims of spring material,y a hub, and spokes connecting the rims to the hub, said spokes being mounted for endwise movement at one end thereof" and stop means limiting the endwise movement of said spokes.

4. A film reel having a pair oi separable hub plates and having lm holding' members held between said plates, said lm holding members comprising a stationary member held in fixed position between said plates and a radially movable member of different curvature than the sta-A tionary member mounted between said plates and separable from said stationary member to receive a film therebetween.

5. A film reel having a pair of separable hub plates and having film holding members held between said plates, said members having end portions overlapping the hub plates, and an intermediate portion extending inwardly between the hub plates, and tie means tying said hub plates together and securing said film holding members between the plates, said members having teeth adjacent the junctions of said portions for receiving the lm perforation.

6. A lm reel having a pair of separable hub plates and having fllm holding members lheld between said plates, said film holding members comprising a stationary member held in fixed position between said plates and a radially movable member of different curvature than the stationary member, said radially movable member overlapping the stationary member and being separable therefrom to receive a film between said members and a spring urging said movable members against the stationary members.

'7. A film reel comprising a hub and a pair of rims spaced apart axially of the reel to receive the lm therebetween, and spok'es mounting the rims on the hub, said spokes being movable endwise in the hub.

8. A reel comprising a hub, a pair of axially spaced rims adapted to receive a film therebetween, spokes connecting the rims to the hub, and said hub having guides for said spokes which restrain said spokes from movement axially or circumferentially of the hubbut allow endwise movement oi' the spokes on the hub, and stop means limiting the endwise movement of said spokes.

HERMAN A. nr: VRY.