US1869527A - Film controlling mechanism - Google Patents

Description

Aug. 2, 1932. s. USUN FILM CONTROLLING MECHANISM Filed July 20. 1928 2 Sheets-Sheet l AT-Tom l EY WITNESSWQWW Aug. 2, 1932. s. USUN FILM CONTROLLING MECHANISM Filed July 20. 1928 2 Sheets-Sheet 2 30% gal NVENTOR BY W \ I wlTNEsswmm ATTORNEY Patent Aug. 2, 1932 I meat? SERGE UBUN, F 8A0 PAULO, 1

Applicatloa'flled July 20, 1928. Serial No, 294,288.

The object oi. this invention is to provide means whereby a film for a motion picture machine may be employed and properly timed after the perforations along one edge have become worn, resulting in the imperfect projection of the pictures.

A further object is to effect this result by the use of means for engaging that row of perforations opposite the one usually engaged, and which remains in good condition long after the openin s forming the first row, or other row of per orations grimarily engaged have become enlarged an fail to function properly.

A further object is to provide a Geneva stop arrangement in which the film is first caused to buckle slightly, is next moved forward, and then stretched sli htly, and then stopped for the production of t e picture.

With the foregoing and other objects in view, the invention consists in the novel construction and arrangement of elements described, illustrated and claimed, it being understood that modifications may he made within the scope of the claims without departin from the s irit of the invention.

in the drawings forming part of this application,

Figure 1 is a view of the mechanism in side so elevation, with a pressure device in section, at

the left of the view.

Figure 2 is a section on line 2-2 of Figure A Figure 3 is a section on line 3-3 of Figes ure 1.

Figure a shows by the use of arrows, that slack is first produced in the film, then forward movement, then slight stretching, and thereafter the film is stationary long enough as for producing the picture.

r'igure 5 is a detail chiefly in section, in a plane indicated by line 5-5 or Figure 1, and shows especially a pair of idler wheels mounted on a shaft and adapted to hold the film with reference to one of the rollers re ferred to below.

Figure 6 is a detail in section showing the engagement of the perforated film by one of the rubber idler wheels or rollers.

The film 10 is engaged by upper notched wheel 11 andpassesbetween thelatter and idle wheel 11', and passes thence over a roller 12 with which idlers 13 cooperate, this roller 12 having a friction surface, or havingteeth 12 engaging the series of rforations on the a film opposite to the series engaged by the usual type of mechanism, orv primarily en-' ga edt ereby.

gtar wheel 14 moving with this roller 12 is engaged by the pin 16 onwheel 17, and the latter is cared to wheel 18 carrying pin 19,pin 16 Eeing a little in advance of the other in. The gearing includes meshing gear wheels 20, 21, 22, and the wheels 17 an 18 rotate in the same direction, or clockwise 66 in Figure 1. a

Engagement is provided between pin 19 and star wheel 24, and idlers 24' cooperate with roller 25 moving with this star wheel. The film passes over roller 25 and is then engaged by teeth on wheel 26 and by idlers 27, it

eing understood that any or all of the idlers may be of the double form shown in F igure 5.

Between rollers 12 and 25 the filmlpasses [5.

between pressure elements 30, 31, and lgure 4 shows that slight bucklin movement is produced in the first stage 0 the operation, starwheel 14 being alone in efiective operation,then both star wheels and rollers 12 25 are in efiective operation in the secon stage, and the film moves forwardly. In the third stage the u per star wheel has ceased to rotate, having'geen stopped in advance of the other, and the film is stretched slightly,- and in the fourth stage both star wheels are stationary and the film is also stationary, for the production of the picture. Cylinder 25 has a smooth or polished surface, and slight sliding movement takes place when the M rotation of the upper cylinder 12 ceases, and the lower cylinder continues movement for a brief interval, as shown diagrammatically in Figure 1. Otherwise, there is sufiicient friction to carry the film along.

Havin described the invention what is claimed is 1. In film controlling means, means includ- 1ng a Geneva stop mechanism for imparting positive intermittent movement to the film,

means including a second Geneva ate a meme nm for lmpartmg movement to and Fearing causing the rotation of themeehanism t named for an interva aim: the com istion 'of operation of the mechanism st named, said mechanism operating for equal periods of time, said stop mechanisms incln' mg star-wheel engaged pins each timed for engagement exclusively of the other in the first and third stages of movement of the film, and timed for simultaneous engagement during the intervening stage, producing slack in the film, uniform movement during the intervening stage, and then slight tensioning of the film. V

2. In film controlling means, means including a Geneva stop mechanism for imparting positive intermittent movement to the film,

means including a second Geneva stop mechanism for imparting movement to the film, means engaging the film at a point between said mechanisms, and gearing causing the ro= tation of the mechanism East named for a interval after the compietion of operation of: the mechanism first named, said mechai operating for equal periods of time, said We mechanisms including star-wheei pins each timed for engagement ezcins of the other in the first and third i movement of the film, and timed so taneo'us en agement during the inter? stage, pro ucing slack in the .e': movement during the intervening stage, then slight tensioning of the In testimony whereof I afix my signature,

. SERGE assess?

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