US1298427A - Rewinding film-reel for projecting-machines. - Google Patents

Description

' Y UNITED s TATiis; P

EINAR G. WENNERBLA'D, or E MERYVILLE, CALIFORNIA, AssiGNoR or ONE-HALF' To PETER M. DIERS, OF BERKELEY, CALIFORNIA.

.EWINDING- FILM-REEL FOR PROJECTING-MACHINES.

Z 10 all lwhom it may concern.'

B e it known that I, EINAR'G. VENNER- BLAD, a .citizen of the United States, residing at Emeryville, inthe county of Alameda and State of California, have invented new and useful Improvements in4 Rewinding Film- Reels for Projecting-Machines, of which the following is a specification.

C 'nisnr efe'iring to the drawings lindetaihA in- This invention relates to a rewinding reel for moving picture films; and the object of the invention is to provide a reel which will wind the film, after it has passed through the pi'ojector of a machine'. in such a manner that. there is no necessityof rewinding the film before it is ready for use the second time. This is 0f great importance asA it not only saves the time and labor occupied in rewnding, but it materially reduces' theI wear and tear of the film. Further objects will hereinafter appear. f i 1 The invent-ion consists of the parts and the construction and combination of parts as hereinaftermore fully described claimed, having reference to the accompanying drawings, in which- Figure 1 is a plan view of the reivinding film. reel with connected operating mecha- 2V'is` a Isideelevationr of the vfilm reel detached.

adicates -.a suitable supporting member, in which is secured a stationary shaft 2. Turnably'monted on the shaft is a sleeve 3,. and secured to the-shaft isa diskl, the inner face of which is' ra'dially slotted, as at 6. These slots are preferably dovetailed in cross ,section andl eachservesas a guide for a block 7 on whichV is journaled a roller 8. The

blocks carrying .the rollers are'each provided with an outwardly projecting lug 9, and

mounted interiorly of said lugs vis a spiral spring-10 which is adapted toV exert anoutward pressure and thereby force the blocks vand rollers against an exterior rim 11 s ecured on a disk 5- integral with the sleeve 3.

Journaled inthe frame, as at 12, is a shaft'4 which may be driven in unison with any suitable revolving part of the proj ectingmazchine, and journaled' in a support, as at 13,-

is a 'second shaft on which is secured a friction driving pulley 14. This pulley engages the .outer face of the disk 5. and thereby serves-as a friction drive, as will hereinafter bedescribed, power'being transmitted from and pulleys i and a Specification of Letters Patent. Patented lil-3,1. 25, 1919. i,

- Application med December 27,1917.- seriaiNvo. 209,143.

In actual operation, it can-readily be seen that if the shaft 12 is driven in unison with some revolving part of the projecting machine movement will be transmitted through the pulleys 15 and the friction Apulley 14 to revolve the disk 5. `The freeend ofthe film shown at 17, if attached to the outerriin, as'

This roller is also attachedfto 8 and it, therefore," gradually recedes in an inward direction as the film is being rewound. The spiral spring 1 0 overlaps itself,

as shown at 10, and gradually decreases in diameter, thus permitting the rollers and the sliding blocks upon which they are mounted to recede as each coil offilm is being wound.

f The friction drive produced by the provilsion of the pulley 14 permits a'slippage 'which willv cause the reel to revolve com partively slowly when the winding operation is first startedand gradually to increase its speed as the interior diameter' of the' wound film decreases. This is an essential feature .as the constant decreasing interior diameter ofthe film'c'oil as itis being rewound demands a constant increase in peripheral speed, thisincrease in'sp'eed being essential to remove the film as quick'ly as it 'rs being discharged by the projector.

While a frictiondrive is here shown, I

wish it understood that any other drive perployed. The film rewinding mechanism here i mitting a similar speed variation may he ein# shown permits the film to' be wound as it is being discharged bythe projector and asthe Winding operation is the reverse to that generally employed, it can readily be seen that the film is in the right :position for immediate use, thereby reducing the Wear and tear to which a film is ordinarily subjected and at the same time`savin'0f valuable. time.

which vis otherwise lost. he' mechanism .here shown is furthermore simple and substantial in construction and is adapted to be this reel by removingthe rim section ll or it projectmay be removed from this reeland placed on an ordinary reel if desired. I also wish it understood that the n'iaterials and finish of the several parts of the device may4 be sur-h as the experience and judgment of thev manufacturer may dictate aud that various changes iu form, proportions andininor dei tails'ot' kconstruction may be resorted to within .the .si-"ope of the appended claims and that design and construction here. shown.

Ila ving` thus described my invention, what l claim and desire to secure by Letters Patent isik A rewinding film. reel comprising a disk having a projecting peripheral rim formed thereon, i-neans `for attaching a film to the inner face ofvsaid rim, a support within the rim, a plurality of radially movable rollers mounted on the support, means for guiding the film over one of said rollers softhat it may be wound interiorly of the projecting rim, and means for revolving the disk at. a gradually increasing speed as the winding of the film progresses.

211A' rewinding film reel comprising a disk having a projecting peripheral rim formed thereon7 means for attaching a film to the inner .face of said rim, a support within the rim, a pluralityfofv radially disposed grooves formedE inthe -face of the support, a block slidably mounted in each groove, a roller carried by eac-h block, means for. exerting an outward pressure on each block. and means for guiding the film between said rollers and the rim to permit reivincling of the film in theinanner described.

3. A rewinding film -reel comprising a disk having a projecting. peripheral rim' formed thereon, means for attaching a film" tothe inner face of said rim, a.l support within lthe rim, a plurality -of radially disposed grooves formed in the fac-e of the support, a 'block slidably :mounted in each groove` a roller carried b v eachblock, a. eollapsi'ble` coil spring mounted interiorly of the blocks engaging the .blocks and .adapted toexert an outward `pressure on the same,

aii .l ap angular-ly 'disposed roller .carried by one of the` blocks adapted to direct and guide the film between'the rollers and the rim'tov permit the film to be reivoundi .as described.

. i f i 1 y i A reivinding film reel comprising a.

. dislfl having a projecting peripheral rim formed thereon, means for attaching' a film' j `to` `the rinner face ofsaid-rnn, a support ,en .ivithm the rim, a pluralityof radially-disdisk having a. projectingl ,peripheral 4:rim

yan angularly disposed-roller -carried by one of the 'blocks adapted to direct and guide, the film between the rollers and the rim to permit the film to be rewound asdescribed, `and means for driving the disk to constantly maint-ain the lm taut-'as .tlie .wind-v ing progresses'.

5. A rewindi'ng film reel comprising a.

disk lia-ving 4a projecting peripheral rim 804 .l do not wish to limit myself to the specific `ofthe blocks 'adapted te direct and guide the lm between the rollers 4and the rim to -permitthe film to'be rewound as described, and|` a friction driving'member adapted to .revolve the disk, said `friction drive per- 95 mitt-ing a slippage so that the disk ma-y revolve 'comparatively slowly when the film winding operation is started and toy gradually increase in speed vas the film Winding operation progresses.' fi.

reivinding film Vree-l comprising a formed thereon, means for attaching a. film lto therinner faceof' said rim,`a support within the rim, a plurality of radially" dis- A posed grooves formed in the face of the support, a block slidabl'y mounted fin. each' groove. a' roller carried by each block. means for exerting an outward pressureon each 'blot-Ali, means for guiding the ilmbetiveen 110 said rollers andthe rim to permit reivinding of the film inthe manner described, and a friction fdriving member adapted to rei volve the i disk, said friction drive permit.

ting a slippage so that the disk may revolvev 115 comparatively.slow when the film winding operation is started and to gra-dually'increase in speed as the ilm.iv'-ind'ing operation progresses.

A reivinding'film reel .comprising a 12.() rotatable member. having a.r projecting peripheral rim formed thereon, means for attaching la film. 'to the `inner face of said rim, a stationary support yWithin the rim, a lplurality of radially disposed grooves formed in 'the support, a block slidably mounted in each groove, a rol-ler carried by 'eaehb1ock, outwardly projecting lugs car-y ried by the blocks, and a coiled spring sup.a

ported by and mounted interiorly ofthe lso lugs for exerting an outward pressure on the rollers.

8. A rewinding'filrn reel omprising a rotatable member having a projecting pe- 5 riplieralrim formed thereon, means for attaching a film to the inner, face of said rim, a stationary support within the rim, a plurality of radially disposed grooves i formed in the support, a iblock'Slidabljy 10 mounted in each groove, aroller jcarred by 'each block, means for feeding a film sub' stantially axially of the disk, and'y means carried by one of the blocks for guiding the film from the feeding means to the adjacent roller. 15

In testimony whereof I have hereunto set my hand in the presence of two subscribing Witnesses. y

EINAR G. WENNERBLAD. lfVitnesses JOHN H. HERRINQ Y W. W. HEALEY.

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