US944749A - Safety shutter device for moving-picture apparatus. - Google Patents

Description

APPLICATION FILED JULYS,1909.

Patented Dec. 28, 1909.

.INVENTOR.

Wald

ink

UNITED srnrns PATENT OFFlCE.

CHARLES M. STANLEY, or HAMILTON, oHIo.

SAFETY SHUTTER DEVICE FOR MOVING-PICTURE APPARATUS.

i Specification of Letters .Iatent.

Patented Dec. 28, 1909.

ppl'leation filed July 3, 1909. Serial No. 505,892.

To all whom it may concern:

Be it known that LQHARLES M. STANLEY, a citizen of the United States, residing at Hamilton, in the county of Butler and State ofOhio, have invented new and useful lmprovementsin. Safety Shutter Devices for ignition of the inflammable films, consisting in passing over and in contact with the film at the area exposed to the light and accompanying heat. rays, a current of air, to modify and reduce the effects of heat upon the. film.

My present invention is supplemental to said former invention and. is intended to meet certain conditions or exigencies of use, and protect the film, where for any reason the protecting air current may fail to operate.

To this end it consists in the provision and use of an opaque shutter, adapted to be interposed in and across the path of the light and heat rays to the film, whenever the protecting air current ceases to operate, and to be withdrawn from said pathv Whenever the current becomes again operative. The invention thus supplements my former one referred to, and completes the protection intended, by making it impossible to use or continue 'the use of the light for its intended purpose when the protecting air current is for any reason stopped, or so reduced in force as to be insufficient to hold up-the shutter. The mechanism is so constructed that, whatever the position of the parts both in use and disuse, the film is effectually screened from the light 'andheat of the lamp by the interposed shutter.

Mechanism embodying and illustrating my invention is shown in the drawings accompanying and forming part of this specification, in which drawings:

Figure 1 is a general side elevation of a common form of moving-picture apparatus employing a continuous film, equipped with my safety devices hereinafter described; and Fig. 2 is a detail (enlarged) of the pivscription.

oted shutter or screen, showing more clearly its relation to the air-nozzle and the aircurrent passin from the same; and Fig. 3 IS a Slmllfll" etail, showing the pivotedshutter thrown back when out of use, in position to still cover the path of rays passing outward from the lamp.

Referring now to the drawings, Av designates the lamp chamber, a the lens frame, 0 the hellowsextension of the light channel, and a a further extension of the light chan nel in the form of a somewhat funnel-shaped mouth-piece. All these parts, together with their supporting parts and adjusting devices, ete, constitute the light-projecting apparatus as usually constructed and used.

'13 designates the supporting stand for the feed-mechanism or: the film stri) Fwhich mechanism is not shown, excepting to indicate the relative positions of the feed rolls 5)" 52 5 6 lenscjfinder 5 and storage reels if, 5 ,the whole constituting, the apparatus generally employed, in connection with. the

. light chamherA and its adjuncts, in projecting theconcentrated rays of light from a source of light within the chamber A. through the channels indicated, and the final cylinder (7 to a screen {not shown) on which.- the photographs upon the film F are thrown and exhibit-ed. All these are mounted on a stand S, form no partof my present invention, and require no further illustration or dein connection with these, I employ a tan or blower S which may be driven by an electric motor 0, and connected by an air-delivery tube 01 to a delivery nozzle d T he tube is preferably connected to the nozzle by a swivel pipe-joint d located upon the stand S between the light mouth-piece a and the film stand B in such relation to the film at its point of crossing the path of the light rays as to discharge upward upon the face of the film.

To the outer endor" the air-discharge nozzle d is secured a'rectangular frame 6 at such an angle as that when the parts are in operative position, the frame a rests upright against the contiguous face of the lightopenin of the stand B. To the upper part above the path of the light rays when the apparatus is in use,'as shown in Fig. 1. To secure this result, a short auxiliary nozzle (Z is provided, leading vertically upward out of the nozzle (l to direct a small current of air directly upward against the flap 6 when in the horizontal position shown, and maintain it in such pos1tion;the flap being con,- structed of light-weight material or suitably counterbalanced to facilitate this result. As will bereadily inferred, should the air current cease to flow, or become too weak, the flap or shutter 0 will at once drop to a vertical position across the path of light and etfectually screen and protect the film.

By way of further precaution against forgetfulness of the operator, and to insure a proper disposition of the screen in operating the picture mechanism, it may now be explained that the function of the swivel oint d is to permit the nozzle d to be swung back, when out of use (as when the film is being changed), to the position indicated in dotted lines in Fig. 1, and in full lines in Fig. 3, against the rear face of the bellowsextension a the mouth piece a being swung aside on its pivoted holding arm a for this purpose.- The frame 6 in this position of the parts leans against the face of the bellows extension, and the .flap or shutter e -hangs down across the light'opening, thus rendering it impossible to work the apparatus until the arts are properly re-adjusted as already indicated- I claim as my invention and desire to secure by Letters Patent of the United States:

1. The combination, with light-projecting apparatus of the character indicated, of

means to prevent over-heating of the film, and an opaque shutter secured in proximity to the ath of light and arranged to automatical y cross the same and intercept the light rays when the means to prevent overheating of the film, cease to operate, but remain out of the path of the light rays when said means are operating.

2. In combination with picture apparatus ofthe character indicated, means for projecting a current of air in contact with the film interposed between the source of light and heat rays and the film, and across the area exposed to light and heat rays, and an opaque shutter adapted, when the air current is operating, to be held out of the path of said rays, but upon cessation or diminution of the air current to drop into a position across the path of said rays.

' 3'. In combination with picture apparatus of the character indicated, means for producing an air current, an adjustable delivery nozzle attached thereto, and a pivoted shutter mediately connected to said nozzle and adapted to hang normally across the path of the light, but be held out of the path of light by the air current when the latter is in operation.

4. In combination with picture apparatus of. the character indicated, an air nozzle and a pivoted shutter mediately attached thereto, said nozzle adjustable to hold the screen across the opening of the film-feeding apparatus, or across the opening of the light projecting apparatus as desired.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

CHARLES M. STANLEY. Witnesses LEWIS M. HOSEA, 'WALT R A. KNIGHT.

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