US1359821A

US1359821A - Reinforced moving-picture-fiim drive

Info

Publication number: US1359821A
Authority: US
Publication date: 1920-11-23
Anticipated expiration: 1937-11-23

Description

M. T. MI'NOGUE.

REINFORCED MOVING PICTURE FILM DRIVE.

APPLlcATIoN FILED Nov. Io, 1919.

1,359,821 Patented Nov. 23, 1920.

nya

esegesi.

UNITED smrssrarsni OFFICE.

MARTIN "r. Minoonn, or PHILADELPHIA, rENNsYLvAifriA.

REIFORCED MOVING-PIGTRE-FILII DRIVE.

l To all whom t 'may concern.'

Be it known that I, MARTIN T. MiNoeUii, a citizen of the United States, and a resident of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have iiivented certain new and useful Improve,- ments in Reinforced Moving-Picture-Film Drives, of which the following is a specification.

@ne object of my invention is'to so reinforce the ordinary manufactured film to prevent breaking or fracture atv the sprocket holes or breaking otherwise during the operation of same, thus greatly adding to the wear and usefulness of the film.

A further obj ect of my invention is to so reinforce a movingpicture film as to render it practically non-breakable in actual use thus maintaining a synchronism between the moving picture' and a talking `machine,

working in conjunction with each other.

These objects I attain in the manner hereinafter set forth. Reference had to the accompanying drawings in which Figure l is a piece of film reinforced with a single filament or strand atA each row of sprocket holes. F ig.r Qis a piece of moving picture film reinforced with two laments or strands of material Vat each row of the sprocket holes. Fig. 3 is a longitudinal cross section of a piece of moving picture film showing the filament or strand interwoven longitudinally through the sprocket holes of the film. Fig. 4iis a cross section of a fsprocket spool driving a film reinforced with one filament. Fig". 5 is a cross section of a sprocket spool driving a fiim reinforced with two filaments.

In Fig. l of the drawing l represents a piece of film of the regular manufacture with the proper sizedand spaced sprocket holes through which a single filament 2 of teeth and extends to a depth inst below the base of the sprocket teeth 12. The filaments or strands are woven into the holes of the film l longitudinally from one sprocket hole to another and so the spaces 11i and 15 are Specification of Letters Patent. Patentgd VNov.

\ y y Application filed November 10, 1919. Serial No. 337,101. i

divided. One -half of thefilmspaces are above the filament andl the other half`r ofthe spaces 15 are below the filament andi areclamped against the surface of the spool sprocket as it `travels over same by the filaments riding on top of spaces l5. The .neXt

hlm space la being on top of the filament Zthefilament will travel in the groove 11 in the center of the sprocketwheels, thus providing a belt drive by the combined friction of the film l and the filamentQ; The

sprocket holes serve onlyiny the capacity ofy timing the pictures by the intermittent gear.

'The groove ll being slightly under the sur-` face of the ysprocket spool and deeper than the base of the sprocket teeth provides for a strong' clamping surface, ff as filament 2 presses spaces 15 against tliesurface ofthe spool sprocket. Also the filament `or strand which is on the .under Lside of the spaces ofthe film between the sprocket 'holes `rides in lthegrooves il andallows vthe film lfto adhere to -the`surface` of the spool sprocket it travels over same. y f y Figi@ ofdrawing is the regular manufactured film with twofilaiiients 5 andk 6 interwoven4 in lsprocket holes longitudinally from hole tohole, separated land each resting a the opposite sides of the sprocket holes,y otherwise it is siinilarto the reinforced film described in Fig. l with the exceptionthattlie rated and guides them to the grooves '8 and 9 around (which they travel.

T he kmaking of the doubie filament is siniilarto that of the single filament explained in Fig. l. The object of the'double filament is to provide greater strength and friction drive.

While I have described a reinforced film and drivej with a single and a double filament passing through the sprocket holes yof the entirelength of a-film reel, I do not confine myself toany particular number of filaments that may be used for reinforcement, iroviding the driving sprockets areso made to receive and drive them properly, neither y do I confine myself to any particular material for the filaments or strands but they must be small in diameter, strong and very fieXible with a very limited amount of stretching quality7 such as linen thread or cord7 copper or steel wire. Neitherdo I confine myself to Athe method of attaching the filaments to the film. It can be woven from one hole to another as explained or holes can be skipped and filaments passed through holes at any given length or desired distance. It can be placed on one or both sides of the film longitudinally withthe sprocket holes and attached to the spaces of film between the sprocket holes in any'well known way, or it can be a part of the manufactured film in which the filaments are embedded in the film bridging across sprocket holes or at the sides of same. Fig. 3 of drawing shows how i the filaments or strands are woven longitudinally from one sprocket hole to another.

Fig. l of drawing shows a sprocket spool 3 to drive a slno'le filament in each of the series of sprocket holes in each'side of thev film l. This sprocket 3 has a central groove l0- and Il in the sprocket teeth 'to receive the filaments 2 and 2. Fig. 5 of the drawing` is a sprocket rspool .7 to drive doubleV lilament as explained in l* ig. 2 with film et. The

' s Jrocket teeth i6 are formed with angle sides pointed at the top to divide the laments 5 and 6 terminating at the base with grooves 8 and 9, the laments 5 and G traveling in the` grooves 8 and 9 between the sprocket holes of the film.

I desirerto call attention to the synchronism of the moving picture to the talking machii'ie.`V rllhe great drawback encountered to properly synchronize the two machines is on account of the breaking of the picture vention ofya reinforced Vfilm and drive pre-A venting breakage and fracture of film a synchronism is constantly maintained between the moving picture and the talking machine. In the usev of vmy invention-of a non-breakable film and drive, with the ordinary projecting machines, it is only neces-V sary to remove the spool sprockets of the ma- Y chine and replace them with the proper spool sprockets 'of my invention,` which will not onlyrdrive and time the reinforced film, but will also drive and time the ordinary film that has not been reinforced. f

Having thus described my invention I claim i l. rthe combination of a moving picture i'ilm reinforced with a flexible drivingvbelt of any suitable material, passing longitudinally across the sprocket holes and interwovenV througl'i the same, a sproc ret spool having a se es oft-eeth to engage the sprocket holes of the film, the sprocket teeth' beingformed to properly receive the flexible driving belt. 2. The combination ofa. moving-picture film reinforced with a. single `filament or strand of anysuitable material passing longitudinally in the center of sprocket holes of Lhe moving picture film, said filament or strand interwoven. through the soiocl it holes,Y half of the spaces of the film betwe n he sprocket holes being aboveand the otherl half below said iilament or traiid, a sprocket Vspool having a series of teeth to engage the sprocket holes of the film,the sprocket teeth having a groovel in center of said teeth to receive said filament or strand and drive said lilamei'i't and moving `picture film as described. Y

3. The combination of a moving picture i'ilin reinforced with a flexible driving belt or filament passing longitudinally across the sprocket holes and interwoven through the r o, a sprocket spool having a series of -i to engage the sprocket holes ofthe the teeth of said sprocket spool being so. formed to properly receive the driving belt or filament, said formation of sprocket Y teeth being lower than the outer surface of the sprocket spool as described.

In testimony whereof, I havesigned my name to this specification in the presence of two subscribing witnesses.

MARTIN T. MINOG'UE. lVitnesses CHAs. L. SMITH, HARRY C. I/Vnnniz.